CN105871410A - Carrier aggregation (CA) radio-frequency circuit and mobile terminal - Google Patents

Abstract

Embodiments of the present invention provide a carrier aggregation CA radio frequency circuit and a mobile terminal, which relate to the field of communication equipment, and can simplify the carrier aggregation CA radio frequency circuit and reduce costs. The carrier aggregation CA radio frequency circuit includes a radio frequency transceiver, a frequency conversion demodulation circuit, a power divider and an antenna; wherein, the antenna is used to receive the CA signal and transmit it to the power divider; the two output ends of the power divider are respectively connected to the radio frequency transceiver The first input end and the second input end of the double selection double pass unit are connected; the first input end and/or the second input end of the double selection double pass unit can be under the effect of the control signal, and the The first output terminal and/or the second output terminal are turned on; the frequency conversion demodulation circuit is configured to receive the signal sent by the dual-select dual-pass unit, and perform modulation and demodulation processing. The embodiments of the present invention are used in the manufacture of mobile terminals.

Description

A carrier aggregation CA radio frequency circuit and mobile terminal

technical field

The invention relates to the field of communication equipment, in particular to a carrier aggregation CA radio frequency circuit and a mobile terminal.

Background technique

With the development of mobile networks, people's lives are increasingly inseparable from mobile networks, and the demand for network speed is getting higher and higher. The development of mobile communication technology and the wide application of the fourth generation mobile communication standard (full name in English: the 4th Generation mobile communication, referred to as: 4G) technology has made the download rate of the mobile network higher and higher. At this stage, the main application of 4G mobile phones is The downlink carrier aggregation technology (English full name: Carrier Aggregation, abbreviation: CA) download rate has been able to make the download rate of the mobile terminal reach more than 300 Mbps.

Among them, CA is the key technology in the upgraded version of Long Term Evolution (English full name: Long Term Evolution-Advanced, referred to as: LTE-A). System transmission bandwidth. Therefore, the LTE-A system introduces a technology to increase the transmission bandwidth, that is, CA. It can aggregate multiple carriers into a wider frequency spectrum, and can also aggregate some discontinuous spectrum fragments together, that is, it can support continuous or non-consecutive carrier aggregation. CA technology can aggregate 2 to 5 LTE component carriers together to achieve a maximum transmission bandwidth of 100MHz, effectively improving the uplink and downlink transmission rates. The mobile terminal can decide according to its own needs how many carriers it can use simultaneously for uplink and downlink transmission.

At present, most mobile terminals in the industry that support CA technology use downlink CA. To implement downlink CA technology, it is necessary to receive signals on at least two carriers at the same time, that is, to realize simultaneous reception and simultaneous reception of two consecutive carriers in the same frequency band. Simultaneous reception of two carriers with discontinuous frequency bands and simultaneous reception of two carriers with different frequency bands. Usually, the wireless signal is received and modulated and demodulated by the radio frequency transceiver. Since a single frequency conversion demodulation unit in the radio frequency transceiver only supports the modulation and demodulation of the carrier within a certain frequency range, the carrier load of each frequency band Cell signals need to be modulated and demodulated through different radio frequency transceiver demodulation units, which requires two or more radio frequency transceivers to support the work of the required CA. Exemplarily, taking a mobile terminal using two radio frequency transceivers CA radio frequency circuits as an example, the mobile terminal includes a first radio frequency transceiver and a second radio frequency transceiver, and the two receiving ends of the power divider are respectively connected to the first radio frequency transceiver machine and the second radio frequency transceiver, the frequency band carrying the CA signal can be the B1 frequency band and/or the B3 frequency band:

When the mobile device is in the simultaneous reception mode of two consecutive carriers in the same frequency band or the simultaneous reception mode of two discontinuous carriers in the same frequency band, that is, the frequency band carrying CA signals is the B1 or B3 frequency band, the mobile device only needs to start the first radio frequency transceiver The transceiver or the second radio frequency transceiver receives the CA signal of the B1 frequency band or the B3 frequency band for modulation and demodulation processing.

When the mobile device is in the simultaneous reception mode of two carriers in different frequency bands, the mobile device needs to start the first radio frequency transceiver to receive the CA signal of the B1 frequency band, and at the same time start the second radio frequency transceiver to receive the CA signal of the B3 frequency band, and perform modulation and demodulation respectively Modulation processing; wherein, the CA signal in the B1 frequency band enters the first radio frequency transceiver for modulation and demodulation processing; the CA signal in the B2 frequency band enters the second radio frequency transceiver for modulation and demodulation processing.

Since the mobile terminal of the user is in the downlink reception state in most cases, which includes the downlink reception using CA, a CA radio frequency circuit is provided as shown in Figure 1 to use two radio frequency transceivers to perform two-way component carrier aggregation CA Taking receiving as an example, the CA radio frequency circuit has two radio frequency transceivers. The carrier aggregation CA radio frequency circuit shown in Figure 1 includes two radio frequency transceivers (RF transceiver 1 and RF transceiver 2), where each radio The transceivers all include: a signal transmission path S1, and at least two signal reception paths S2, S3, wherein the signal transmission path S1 includes the following structure: a signal transmission channel 18, a gating unit 19, a first transmission power amplifier 20, an upper Frequency conversion unit 21, signal receiving channel 22 and transmitting filter unit 23; S2 and S3 on the signal receiving path include the following structures: signal receiving channel 11, gating unit 12, frequency down conversion unit 13, first power amplifier unit 14, second power amplifier unit 15 . A first filtering unit 16 , and a second filtering unit 17 .

When performing downlink reception, both radio frequency transceivers are used for downlink reception, and only one of the radio frequency transceivers is used for uplink transmission, and the transmission function of the other radio frequency transceiver is idle; in addition, due to the needs of mobile terminals to transmit signals Less, another RF transceiver is only used as a receiver in most cases, therefore, the complex way of using two or more RF transceivers results in lower and lower effective utilization of RF transceivers by mobile terminals .

At the same time, due to the complexity and combination diversity of CA technology, especially when it comes to intra-band non-continuous CA and inter-band CA, the use of two or more radio frequency transceivers makes the carrier aggregation CA radio frequency circuit used for downlink carrier aggregation technology more complicated. As more and more electronic devices are used, the printed circuit board (English name: Printed Circuit Board, abbreviated as: PCB) layout area becomes larger and the cost becomes higher and higher.

Contents of the invention

Embodiments of the present invention provide a carrier aggregation CA radio frequency circuit and a mobile terminal, which can simplify the carrier aggregation CA radio frequency circuit and reduce costs.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, the present invention provides a carrier aggregation CA radio frequency circuit, including a radio frequency transceiver, a frequency conversion demodulation circuit, a power divider and an antenna;

The antenna interface of the power splitter is connected to the antenna, and the antenna is used to receive the CA signal;

The radio frequency transceiver includes a first signal receiving channel, a second signal receiving channel, a dual-select double-pass unit and a down-conversion unit; the first output end of the power divider is connected with the first signal receiving channel, and the second output end of the power divider connected to the second signal receiving channel;

The first input end of the dual-selection dual-pass unit is connected to the first signal receiving channel, the second input end of the dual-selection dual-pass unit is connected to the second signal receiving channel, and the first output end of the dual-selection dual-pass unit is connected to the down conversion unit. The second output terminal of the dual-selection unit is connected to the frequency conversion demodulation circuit, wherein the first input terminal and/or the second input terminal of the dual-selection unit can be connected with the double-selection unit under the action of the control signal conducting the first output terminal and/or the second output terminal;

The frequency conversion demodulation circuit is configured to receive the signal sent by the dual-select dual-pass unit, and perform modulation and demodulation processing.

In a second aspect, an embodiment of the present invention provides a mobile terminal, including the carrier aggregation CA radio frequency circuit provided in the first aspect of the present invention.

The carrier aggregation CA radio frequency circuit and mobile terminal provided by the present invention include a radio frequency transceiver, a frequency conversion demodulation circuit, a power splitter and an antenna; the antenna interface of the power splitter is connected to the antenna, and the antenna is used to receive CA signals; the radio frequency transceiver includes The first signal receiving channel, the second signal receiving channel, the double-selection double-pass unit and the down-conversion unit; the first output end of the power divider is connected to the first signal receiving channel, and the second output end of the power divider is connected to the second signal The receiving channels are connected; the first input end of the double-selection double-pass unit is connected to the first signal receiving channel, the second input end of the double-selection double-pass unit is connected to the second signal receiving channel, and the first output end of the double-selection double-pass unit is connected to the lower The frequency conversion unit, the second output end of the double-selection double-pass unit is connected to the frequency conversion demodulation circuit, wherein, the first input end and/or the second input end of the double-selection double-pass unit can be connected with the double-selection double-pass unit under the action of the control signal. The first output terminal and/or the second output terminal of the dual-pass unit are turned on; the frequency conversion demodulation circuit is configured to receive the signal sent by the dual-select dual-pass unit and perform modulation and demodulation processing.

It can be seen from the above that when the carrier aggregation CA radio frequency circuit receives the CA signal, the antenna receives and sends the CA signal to the power splitter, and then the corresponding output end of the power splitter outputs the CA signal, the first signal channel of the transceiver and the second The signal channels are respectively connected to the two output terminals of the power divider, and the CA signal is transmitted to the dual-selection dual-pass unit through the signal receiving channel, and then the CA signal is sent to the down-conversion unit or frequency conversion of the RF transceiver through the dual-selection dual-pass unit The demodulation circuit realizes that the down-conversion unit and the frequency conversion demodulation circuit of the radio frequency transceiver respectively perform modulation and demodulation processing on the CA signal. Because the double-select double-pass unit receives the CA signal and can selectively send the CA signal to the down-conversion unit or the frequency conversion demodulation circuit of the radio frequency transceiver, and the frequency conversion demodulation circuit can receive the CA signal sent from the radio frequency transceiver and The received CA signal is modulated and demodulated, thus avoiding separate processing of the CA signal through two radio frequency transceivers in the prior art. Compared with the prior art, the carrier aggregation CA radio frequency circuit can be simplified and the cost can be reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by the prior art;

FIG. 2 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by another embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a dual-selection-dual-pass unit provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a carrier aggregation CA radio frequency circuit provided by another embodiment of the present invention.

Reference signs:

10-carrier aggregation CA radio frequency circuit;

20 - radio frequency transceiver;

2011-signal transmission channel; 2012-first signal receiving channel; 2013-second signal receiving channel;

2021-the first transmitting power amplifier; 2022-the first power amplifier unit; 2023-the second power amplifier unit; 2024-the third power amplifier unit; 2025-the fourth power amplifier unit;

2031-up-conversion unit; 2032-down-conversion unit;

2041-transmission filter; 2042-first filter unit; 2043-second filter unit; 2044-third filter unit; 2045-fourth filter unit;

2051-Double selection double-throw unit; 2052-The first single-pole double-throw switch; 2053-The second single-pole double-throw switch; 2054-The third single-pole double-throw switch; 2055-The first switch; 2056-Gating unit;

2081-low noise amplifier unit;

30-frequency conversion demodulation circuit;

40-antenna; 4011-main antenna; 4012-diversity antenna;

50-power splitter;

60-power amplifier;

S1-signal of the first cell; S2-signal of the second cell.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present invention provides a carrier aggregation CA radio frequency circuit 10, as shown in FIG. 40; the antenna interface of the power divider 50 is connected to the antenna 40, and the antenna 40 is used to receive the CA signal; the radio frequency transceiver 20 includes a first signal receiving channel 2012, a second signal receiving channel 2013, a dual-selection and dual-pass unit 2051 and a down conversion Unit 2032; the first output end of the power divider 50 is connected with the first signal receiving channel 2012, and the second output end of the power divider 50 is connected with the second signal receiving channel 2013; the first input end of the double-selection double-pass unit 2051 Connect the first signal receiving channel 2012, the second input end of the double-selection dual-pass unit 2051 is connected to the second signal receiving channel 2013, the first output end of the double-selection dual-pass unit 2051 is connected to the down conversion unit 2032, the double-selection dual-pass unit 2051 The second output end of the double selection double pass unit 2051 is connected to the frequency conversion demodulation circuit 30, wherein, the first input end and/or the second input end of the double selection double pass unit 2051 can be connected with the first input end of the double selection double pass unit 50 under the effect of the control signal The first output terminal and/or the second output terminal are turned on; the frequency conversion demodulation circuit 30 is configured to receive the signal sent by the dual-select dual-pass unit 2051 and perform modulation and demodulation processing.

Comparing Fig. 1 and Fig. 2, it can be seen that in the present invention, a radio frequency transceiver 20 in the carrier aggregation CA radio frequency circuit using two radio frequency transceivers in the prior art is replaced by a frequency conversion demodulation circuit 30, and the frequency conversion demodulation circuit 30 It is used to receive the CA signal sent by the dual-select dual-pass unit 2051, and perform modulation and demodulation processing on the CA signal; the corresponding antenna 40 originally connected to two radio frequency transceivers 20 is also connected to one radio frequency transceiver 20 at the same time As a result, only one radio frequency transceiver 20 is required to receive the CA signal, which originally requires two radio frequency transceivers 20 , thereby simplifying the carrier aggregation CA radio frequency circuit 10 and reducing the cost.

It should be noted that, as shown in FIG. 2 , the radio frequency transceiver 20 also includes: a frequency down conversion unit 2032, a first filter unit 2042, a first power amplifier unit 2022, a second filter unit 2043 and a second power amplifier unit 2023; wherein, the radio frequency The down conversion unit 2032 of the transceiver 20 is connected to the first filter unit 2042 and the second filter unit 2043 ; the first filter unit 2042 is connected to the first power amplifier unit 2022 , and the second filter unit 2043 is connected to the second power amplifier unit 2023 .

The frequency conversion demodulation circuit 30 also includes: a third filter unit 2044, a third power amplifier unit 2024; a fourth filter unit 2045 and a fourth power amplifier unit 2025; wherein, the down conversion unit 2032 of the frequency conversion demodulation circuit 30 is connected to the third filter unit 2044 and the fourth filtering unit 2045; the third filtering unit 2044 is connected to the third power amplifier unit 2024, and the fourth filtering unit 2045 is connected to the fourth power amplifier unit 2025.

Specifically, in a carrier aggregation CA radio frequency circuit 10 provided by an embodiment of the present invention, as shown in FIG. 3 , when the CA signals are the first cell signal S1 and the second cell signal S2 in the same frequency band, the first An output end outputs the first cell signal S1 and the second cell signal S2.

The double-select double-pass unit 2051 is configured such that the first input terminal of the double-select dual-pass unit 2051 conducts the first output terminal of the double-select dual-pass unit 2051 and the second output terminal of the double-select dual-pass unit 2051 at the same time; the down-conversion unit 2032 is configured to demodulate the first cell signal S1; the frequency conversion demodulation circuit 30 is configured to demodulate the second cell signal S2.

Specifically, in the carrier aggregation CA radio frequency circuit 10 provided by the embodiment of the present invention, as shown in FIG. 4 , when the CA signals are the first cell signal S1 and the second cell signal S2 in different frequency bands, the first One output end outputs the first cell signal S1, and the second output end of the power divider 50 outputs the second cell signal S2;

The double-selection-dual-pass unit 2051 is configured such that the first input terminal of the double-selection-dual-pass unit 2051 conducts the first output terminal of the double-selection-dual-pass unit 2051, and the second input terminal of the double-selection-dual-pass unit 2051 conducts the double-selection dual-passage unit 2051. The second output terminal of the pass unit 2051; the down conversion unit 2032 is configured to demodulate the first cell signal S1; the frequency conversion demodulation circuit 30 is configured to demodulate the second cell signal S2.

It should be noted that, a carrier aggregation CA radio frequency circuit provided by an embodiment of the present invention, as shown in FIG. LN) for power amplification of the CA signal.

Specifically, with reference to the scenarios shown in Figures 3 and 4, the above solution is described as follows:

Wherein, when the carrier aggregation CA radio frequency circuit 10 is in the in-band CA mode, the PCELL signal in the B1 frequency band is the first cell signal S1 in the present invention; the SCELL signal in the B1 frequency band is the second cell signal S2 in the present invention; B1 The PCELL signal in the frequency band and the SCELL signal in the B1 frequency band together constitute the CA signal in the B1 frequency band; the PCELL signal in the B1 frequency band refers to the main component carrier under the main serving cell (the main serving cell is a cell working on the main frequency band), The SCELL signal in the B1 frequency band refers to the secondary component carrier under the secondary serving cell (the secondary serving cell is a cell working on the secondary frequency band). When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the PCELL signal in the B1 frequency band is the first cell signal S1 in the present invention; the SCELL signal in the B3 frequency band is the second cell signal S2 in the present invention; and the B1 frequency band The PCELL signal refers to the primary component carrier under the primary serving cell (the primary serving cell is a cell operating on the main frequency band), and the B3 frequency band SCELL signal refers to the secondary component carrier under the secondary serving cell (the secondary serving cell is cells on the frequency band).

In the cellular communication network, the base station is set on the three vertices of the hexagon of each cell, and each base station uses three directional antennas with 120-degree fan-shaped radiation, covering one-third of the three adjacent cells respectively. , each cell is covered by three 120-degree sector antennas, that is, the "vertex excitation" method, and the area covered by each antenna is a base station sector. For different base station sectors, the antennas and receiving channels set by the mobile terminal are also different. As shown in Figure 3, the signal receiving channels include PRX-LB1, PRX-LB2, PRX-MB1, PRX-MB2, PRX-HB1, PRX -HB2. Among them, PRX-LB1 and PRX-LB2 are used for signal transmission received by low-frequency antennas; PRX-MB1 and PRX-MB2 are used for signal transmission of intermediate-frequency antennas; PRX-HB1 and PRX-HB2 are used for signal transmission of high-frequency antennas; among them, PRX -LB1, PRX-MB1 and PRX-HB1 constitute a complete set of omnidirectional antenna signals; PRX-LB2, PRX-MB2 and PRX-HB2 constitute another complete set of omnidirectional antenna signals. The mobile terminal equipment can be connected to different receiving channels according to different cell signals to meet the reception of signals. The embodiment provided in this solution is only for one situation in signal receiving, that is, only one signal is connected to the signal receiving channel. It does not mean that there is only this kind of signal reception, so I won’t go into details here. In addition, as shown in FIGS. 3 and 4, in order to realize simultaneous processing of multiple CA signals, the radio frequency transceiver 20 is composed of a plurality of down-conversion units 2032, and the down-conversion unit 2032 in FIGS. Downconverter) implementation, and shows the quadrature downconverter of the main receiving circuit (full English name: Primary Receiver, abbreviated: PRX) and diversity receiver circuit (full English name: Diversity Receiver, abbreviated: DRX) quadrature downconverter; The antenna 40 connected to the quadrature down-converter through the signal receiving channel is mainly used for receiving and sending CA signals, and the antenna 40 connected to the DRX quadrature down-converter through the signal receiving channel is only used for receiving CA signals, wherein the radio frequency transceiver The PRX quadrature down-converter in the radio frequency transceiver 20 mainly processes the primary component carrier PCELL under the primary serving cell, and the DRX quadrature down-converter in the radio frequency transceiver 20 mainly processes the secondary component carrier SCELL under the secondary serving cell; wherein, when the antenna When 40 receives the CA signal, the antenna 40 connected to the PRX quadrature down converter in the radio frequency transceiver 20 and the antenna 40 connected to the DRX quadrature down converter in the radio frequency transceiver will all receive the CA signal, and the CA The signal is sent to the double-select double-pass unit 2051 in the radio frequency transceiver 20, and the CA signal is selectively sent to the PRX quadrature down-converter and DRX of the radio frequency transceiver 20 by the double-select double-pass unit 2051 in the radio frequency transceiver 20 The PRX quadrature down-converter and the DRX quadrature down-converter of the quadrature down-converter or the frequency conversion demodulation circuit 30, so that the antenna 40 connected to the PRX quadrature down-converter in the radio frequency transceiver 20 and the antenna 40 connected to the radio frequency The antenna 40 on the DRX quadrature down-converter in the transceiver 20 simultaneously receives a CA signal and performs corresponding processing on it so as to obtain the best signal. The DRX quadrature downconverter used here mainly separates the received multiple CA signals into irrelevant (independent) multiple CA signals, and then separates these multiple CA signals, and divides the separated CA signals into Certain rules are combined to enhance the received useful CA signal, thereby improving the signal-to-noise ratio of the received CA signal, reducing the signal fading of the CA signal during transmission, and ensuring the reliability of CA signal transmission.

Scenario 1: Referring to FIG. 3, when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, as shown in FIG. 3, the antenna 40 of the carrier aggregation CA radio frequency circuit 10 only uses one of them when receiving a CA signal The antenna 40 receives the CA signal; when the antenna 40 of the carrier aggregation CA radio frequency circuit 40 receives the CA signal, the CA signal enters the power divider 50, and outputs the CA signal through the first output terminal of the power divider 50, and then passes through the signal receiving channel PRX- MB1 sends the CA signal to the dual-selection-dual-pass unit 2051. At this time, the first input end of the dual-selection-dual-passage unit 2051 is turned on simultaneously with the first output end of the dual-selection-dual-passage unit 2051 and the first output end of the dual-selection-dual-passage unit 2051. Two output terminals; since the CA signal includes the first cell signal S1 and the second cell signal S2, the CA signal is sent to the PRX quadrature downconverter of the radio frequency transceiver 20 by the double-selection dual-pass unit 2051, and the radio frequency transceiver 20 The PRX quadrature down-converter of the first cell performs modulation and demodulation processing on the first cell signal S1; the CA signal is sent to the PRX quadrature down-converter of the frequency conversion demodulation circuit 30 through the double-selection and double-pass unit 2051, and the frequency conversion demodulation circuit 30 The PRX quadrature down-converter performs modulation and demodulation processing on the signal S2 of the second cell.

Scenario 2: Referring to FIG. 3, when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, as shown in FIG. 3, the antenna 40 of the carrier aggregation CA radio frequency circuit 10 only uses one of them when receiving a CA signal The antenna 40 receives the CA signal; when the antenna 40 of the carrier aggregation CA radio frequency circuit 10 receives the CA signal, the CA signal enters the signal receiving channel DRX-MB1, and then sends the CA signal to the dual-selection-dual-pass unit through the signal receiving channel DRX-MB1 2051, at this time, the first input terminal of the dual-selection dual-pass unit 2051 is simultaneously turned on the first output terminal of the dual-selection dual-pass unit 2051 and the second output terminal of the dual-selection dual-pass unit 2051; since the CA signal contains the first sub-district The signal S1 and the second cell signal S2 send the CA signal to the DRX quadrature downconverter of the radio frequency transceiver 20 through the double selection and dual pass unit 2051, and the DRX quadrature downconverter of the radio frequency transceiver 20 converts the signal of the first cell S1 performs modulation and demodulation processing; the CA signal is sent to the DRX quadrature down-converter of the frequency conversion demodulation circuit 30 through the double-selection and double-pass unit 2051, and the DRX quadrature down-converter of the frequency conversion demodulation circuit 30 performs the second cell signal S2 performs modulation and demodulation processing; here the first cell signal S1 and the second cell signal S2 pass through the same low noise amplifier unit 2081 on the same signal receiving channel in the radio frequency transceiver 20 .

In addition, the processing manner in the in-band continuous CA mode is similar to that in the discontinuous CA mode and will not be repeated here.

Scenario 3: Referring to Figure 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, as shown in Figure 4, the two antennas 4011 of the carrier aggregation CA radio frequency circuit 10 receive two CA signals at the same time, that is, two The antenna 4011 receives CA signals of different frequency bands at the same time, and the CA signals of different frequency bands need different antennas 4011 to receive; when the antenna 4011 of the carrier aggregation CA radio frequency circuit 40 receives the CA signal, the CA signal enters the power splitter 50 and passes through the power splitter 50. The first output terminal outputs the first cell signal S1 of the first frequency band, and then transmits the first cell signal S1 of the first frequency band to the dual-selection-dual-pass unit 2051 through the signal receiving channel PRX-MB1. At this time, the dual-selection and dual-passage The first input end of unit 2051 conducts the first output end of double-selection double-pass unit 2051, the second input end conduction of double-selection double-pass unit 2051 the second output end of double-selection double-pass unit 2051; The dual-pass unit 2051 sends the first cell signal S1 of the first frequency band to the PRX quadrature downconverter of the radio frequency transceiver 20, and the PRX quadrature downconverter of the radio frequency transceiver 20 converts the first cell signal S1 of the first frequency band Perform modulation and demodulation processing.

When the antenna 4011 of the carrier aggregation CA radio frequency circuit 10 receives the CA signal, the CA signal enters the power divider 50, outputs the second cell signal S2 of the second frequency band through the second output terminal of the power divider 50, and then passes through the signal receiving channel PRX -MB2 transmits the signal S2 of the second cell in the second frequency band to the dual-select dual-pass unit 2051, at this time, the first input terminal of the dual-select dual-pass unit 2051 is turned on to the first output terminal of the dual-select dual-pass unit 2051, and the dual-select dual-pass unit 2051 Select the second input terminal of double-selection dual-pass unit 2051 conduction second output end of double-selection dual-pass unit 2051; In the PRX quadrature down converter, the PRX quadrature down converter of the frequency conversion demodulation circuit 30 performs modulation and demodulation processing on the second cell signal S2 in the second frequency band.

Scenario 4: Referring to Figure 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, as shown in Figure 4, the two antennas 4012 of the carrier aggregation CA radio frequency circuit 10 receive two CA signals at the same time, that is, two The antenna 4012 receives CA signals of different frequency bands at the same time, and the CA signals of different frequency bands need to be received by different antennas 4012; when the antenna 4012 of the carrier aggregation CA radio frequency circuit 10 receives the CA signal, the CA signal enters the signal receiving channel DRX-MB1, and then passes through The signal receiving channel DRX-MB1 transmits the signal S1 of the first cell in the first frequency band to the dual selection and dual communication unit 2051. At this time, the first input terminal of the dual selection and dual communication unit 2051 is turned on to the first Output end, the second input end of double-selection-dual-pass unit 2051 leads the second output end of double-selection-dual-pass unit 2051; Then the first cell signal S1 of the first frequency band is sent to radio frequency transceiver by double-selection and dual-pass unit 2051 The DRX quadrature downconverter of the transceiver 20, the DRX quadrature downconverter of the radio frequency transceiver 20 performs modulation and demodulation processing on the first cell signal S1 in the first frequency band.

When the antenna 4012 of the carrier aggregation CA radio frequency circuit 10 receives the CA signal, the CA signal enters the signal receiving channel DRX-MB2, and then transmits the second cell signal S2 of the second frequency band to the dual-selection-double-pass through the signal receiving channel DRX-MB2 Unit 2051, at this time, the first input end of double selection and double pass unit 2051 is turned on the first output end of double choice and double pass unit 2051, and the second input end of double choice and double pass unit 2051 is turned on double choice and double pass unit 2051 The second output end of the second output terminal; then the second cell signal S2 of the second frequency band is sent to the DRX quadrature down converter of the frequency conversion demodulation circuit 30 through the double selection and double pass unit 2051, and the DRX quadrature down converter of the frequency conversion demodulation circuit 30 The frequency converter performs modulation and demodulation processing on the second cell signal S2 in the second frequency band; it can be seen from the above that when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the two antennas 4011 or the two antennas 4011 in the carrier aggregation CA radio frequency circuit 10 An antenna 4012 receives two CA signals of different frequency bands at the same time. The two CA signals need to enter the corresponding signal receiving channel in the radio frequency transceiver 20, and then pass through the low noise amplifier unit 2081 on the corresponding signal receiving channel.

Specifically, a carrier aggregation CA radio frequency circuit 10 provided by an embodiment of the present invention, as shown in FIG. The first common end of the double-throw switch 2052 is connected to the first output end of the double-selection double-pass unit 2051, and the first selection end of the first single-pole double-throw switch 2052 is connected to the first input end of the double-selection double-pass unit 2051. The second selection end of the double-throw switch 2052 is connected to the second input end of the double-selection double-pass unit 2051;

The second common end of the second single-pole double-throw switch 2053 is connected to the second output end of the double-selection double-pass unit 2051, and the first selection end of the second single-pole double-throw switch 2053 is connected to the first input end of the double-selection double-pass unit 2051, The second selection end of the second SPDT switch 2053 is connected to the second input end of the double selection double pass unit 2051 .

It should be noted that the specific structure of the double-select double-pass unit 2051 is shown in Figure 5, which is realized by controlling the conduction of two single-pole double-throw switches with a control signal, for example, using the high and low levels output by the register as the control signal: Between CA, when the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; when the register value is 0, B1-A2 is turned on, and B2-A1 is turned on; for the in-band CA double-selection double-pass unit The middle control signal controls B1-A1 to be turned on, and B1-A2 to be turned on.

Specifically, a carrier aggregation CA radio frequency circuit 10 provided by an embodiment of the present invention, as shown in FIG. 2 , the carrier aggregation CA radio frequency circuit 10 further includes a first switch 2055:

The first terminal of the first switch 2055 is connected to the second output terminal of the dual-select dual-pass unit 2051 , and the second terminal of the first switch 2055 is connected to the frequency conversion demodulation circuit 30 .

Specifically, a carrier aggregation CA radio frequency circuit 10 provided by an embodiment of the present invention, as shown in FIGS. 6 and 7 , the carrier aggregation CA radio frequency circuit 10 further includes a third single-pole double-throw switch 2054;

The first end of the third single-pole double-throw switch 2054 is connected to the first output end of the double-selection double-pass unit 2051, and the second end of the third single-pole double-throw switch 2054 is connected to the second output end of the double-selection double-pass unit 2051. The common end of the SPDT switch 2054 is connected to the frequency conversion demodulation circuit 30 .

It should be noted that, after the CA signal is transmitted to the down-conversion unit 2032 of the radio frequency transceiver 20 or the down-conversion unit 2032 of the frequency conversion demodulation circuit 30, the down conversion unit 2032 of the radio frequency transceiver 20 and the frequency conversion demodulation circuit 30 will perform the CA signal The modulation and demodulation processing of PCELL signal and SCELL signal in is:

When the carrier aggregation CA radio frequency circuit 10 is in the in-band CA mode:

The down-conversion unit 2032 of the radio frequency transceiver 20 is used to demodulate the PCELL signal in the CA signal into the first orthogonal I-way signal and the first Q-way signal; the first filter unit 2042 is used to filter the first I-way signal ; The first power amplifier unit 2022 is used to adjust the power of the first I-way signal after filtering; the second filter unit 2043 is used to filter the first Q-way signal; the second power amplifier unit 2023 is used to adjust the first Q-way signal after filtering The power of the signal.

The down-conversion unit 2032 of the frequency conversion demodulation circuit 30 is used to demodulate the SCELL signal in the CA signal into the second orthogonal I-way signal and the second Q-way signal; the third filtering unit 2044 is used for the second I-way signal filtering; the third power amplifier unit 2024 is used to adjust the power of the filtered second I signal; the fourth filter unit 2045 is used to filter the second Q signal; the fourth power amplifier unit 2025 is used to adjust the filtered second Q power of the signal.

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode:

The down-conversion unit 2032 of the radio frequency transceiver 20 is used to demodulate the PCELL signal or the SCELL signal in the CA signal into the first orthogonal I-way signal and the first Q-way signal; The first power amplifier unit 2022 is used to adjust the power of the filtered first I-way signal; the second filter unit 2043 is used to filter the first Q-way signal; the second power amplifier unit 2023 is used to adjust the filtered first I-way signal. The power of a Q channel signal.

The down-conversion unit 2032 of the frequency conversion demodulation circuit 30 is used to demodulate the PCELL signal or the SCELL signal in the CA signal into the second orthogonal I-way signal and the second Q-way signal; the third filter unit 2044 is used for the second I-way signal filtering; the third power amplifier unit 2024 is used to adjust the power of the filtered second I-way signal; the fourth filter unit 2045 is used to filter the second Q-way signal; the fourth power amplifier unit 2025 is used to adjust the filtered power The power of the second Q channel signal.

Here, the first I-channel signal and the first Q-channel signal or the second I-channel signal and the second Q-channel signal respectively correspond to output two independent signals, and the phase difference between the two signals is 90°. The corresponding filtering unit and the power amplifier unit connected thereto, so that the output of two stable orthogonal first I-way signals and the first Q-way signal or the second I-way signal and the second Q-way signal; as shown in Figure 3, As shown in 4, 6, and 7, the information transmission between the radio frequency transceiver 20 and the frequency conversion demodulation circuit 30 is through the main channel PRX-CA and the diversity channel DRX-CA, wherein the main channel PRX-CA refers to the radio frequency transceiver 20 The path formed between the PRX-CA on the radio transceiver 20 and the PRX-CA on the radio frequency transceiver 20; the diversity path DRX-CA refers to between the DRX-CA on the radio frequency transceiver 20 and the DRX-CA on the frequency conversion demodulation circuit 30 formed pathway.

Specifically, with reference to the scenarios shown in Figures 3, 4, 6, and 7, the above solution is described as follows:

Example 1, as shown in Figure 3, when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the power divider 50 through the antenna 40, and then the first output terminal of the power divider 50 outputs CA signal, through the signal receiving channel PRX-MB1, the CA signal is transmitted to the dual-select dual-pass unit 2051, and the CA signal is sent to the PRX quadrature down converter of the radio frequency transceiver 20 through the dual-select dual-pass unit 2051, and the radio frequency transceiver 20 The PRX quadrature down converter modulates and demodulates the PCELL signal in the CA signal.

When the CA signal enters the power splitter 50 through the antenna 40, then the CA signal is output from the first output end of the power splitter 50, and the CA signal is transmitted to the double-selection-dual-pass unit 2051 through the signal receiving channel PRX-MB1, and the dual-selection and dual-passage The pass unit 2051 sends the CA signal to the first switch, and the first switch 2055 transmits the CA signal to the PRX quadrature down converter of the frequency conversion demodulation circuit 30 for modulation and demodulation processing.

Example 2, as shown in Figure 3, when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 40, and transmits the CA signal through the signal receiving channel DRX-MB1 To the double-selection-dual-pass unit 2051, the CA signal is sent to the DRX quadrature down-converter of the radio frequency transceiver 20 through the double-selection dual-pass unit 2051, and the PCELL in the CA signal is converted by the DRX quadrature down-converter of the radio frequency transceiver 20 Signal modulation and demodulation processing.

When the CA signal enters the signal receiving channel DRX-MB1 through the antenna 40, the CA signal is transmitted to the dual-selection-dual-pass unit 2051 through the signal-receiving channel DRX-MB1, and the CA signal is sent to the first switch 2055 through the dual-selection dual-passage unit 2051, Then the first switch 2055 transmits the CA signal to the DRX quadrature down converter 2032 of the frequency conversion demodulation circuit 30 , and the DRX quadrature down converter of the frequency conversion demodulation circuit 30 modulates and demodulates the SCELL signal in the CA signal.

In addition, the processing manner in the in-band continuous CA mode is similar to that in the discontinuous CA mode and will not be repeated here.

Example 3. As shown in FIG. 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power splitter 50 through the antenna 4011, and then the first output terminal of the power splitter 50 outputs the CA signal, The CA signal is transmitted to the dual-select dual-pass unit 2051 through the signal receiving channel PRX-MB1, and the CA signal is sent to the PRX quadrature down converter of the radio frequency transceiver 20 through the dual-select dual-pass unit 2051, and the PRX of the radio frequency transceiver 20 The quadrature down converter modulates and demodulates the PCELL signal in the CA signal.

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power splitter 50 through the antenna 4011, and then the first output terminal of the power splitter 50 outputs the CA signal, and the CA signal is transmitted through the signal receiving channel PRX-MB2. The signal is transmitted to the double-select double-pass unit 2051, and the CA signal is sent to the first switch 2055 through the double-select double-pass unit 2051, and the first switch 2055 transmits the CA signal to the PRX quadrature down converter of the frequency conversion demodulation circuit 30, The SCELL signal in the CA signal is modulated and demodulated by the PRX quadrature down converter of the frequency conversion demodulation circuit 30 .

Example 4, as shown in Figure 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 4012, and transmits the CA signal to the dual channel DRX-MB1 through the signal receiving channel DRX-MB1 The dual-pass unit 2051 is selected, and the CA signal is sent to the DRX quadrature downconverter of the radio frequency transceiver 20 through the dual-selection dual-pass unit 2051, and the PCELL signal in the CA signal is modulated by the DRX quadrature downconverter of the radio frequency transceiver 20 demodulation processing.

When the CA signal enters the signal receiving channel DRX-MB2 through the antenna 4012, the CA signal is transmitted to the dual-selection-dual-pass unit 2051 through the signal-receiving channel DRX-MB2, and the CA signal is sent to the first switch 2055 through the dual-selection dual-passage unit 2051, The first switch 2055 transmits the CA signal to the DRX quadrature downconverter of the frequency conversion demodulation circuit 30 , and the DRX quadrature downconverter of the frequency conversion demodulation circuit 30 modulates and demodulates the SCELL signal in the CA signal.

Specifically, when the above solution is implemented in the form of a register-controlled single-pole double-throw switch, the specific instructions are as follows:

Example five, with reference to FIG. 3 , when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the power splitter 50 through the antenna 40, and then the first output port of the power splitter 50 outputs the CA signal, The CA signal is transmitted to the dual-selection-dual-pass unit 2051 through the signal receiving channel PRX-MB1; at this time, the control signal in the dual-selection dual-passage unit 2051 controls the conduction of B1-A1, and the conduction of B1-A2; the dual-selection dual-passage unit 2051 The CA signal is sent to the PRX quadrature downconverter of the radio frequency transceiver 20 , and the PCELL signal in the CA signal is modulated and demodulated by the PRX quadrature downconverter of the radio frequency transceiver 20 .

When the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the power divider 50 through the antenna 40, and then the first output terminal of the power divider 50 outputs the CA signal, and passes through the signal receiving channel PRX-MB1 The CA signal is sent to the double-selection-dual-pass unit 2051; at this time, the control signal in the double-selection-dual-passage unit 2051 controls B1-A1 to be turned on, and B1-A2 is turned on; the CA signal is sent to the second A switch 2055, the first switch 2055 transmits the CA signal to the PRX quadrature down converter of the frequency conversion demodulation circuit 30, and the PRX quadrature down converter of the frequency conversion demodulation circuit 30 modulates and demodulates the SCELL signal in the CA signal deal with.

Example 6. Referring to FIG. 3, when the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 40, and the CA signal is sent to the dual channel through the signal receiving channel DRX-MB1. Select the dual-pass unit 2051; at this time, the control signal in the dual-select dual-pass unit 2051 controls the conduction of B1-A1, and the conduction of B1-A2; the dual-select dual-pass unit 2051 sends the CA signal to the DRX quadrature of the radio frequency transceiver 20 The down-converter is used to modulate and demodulate the PCELL signal in the CA signal by the DRX quadrature down-converter of the radio frequency transceiver 20 .

When the carrier aggregation CA radio frequency circuit 10 is in the in-band discontinuous CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 40, and transmits the CA signal to the dual-selection-dual-pass unit 2051 through the signal receiving channel DRX-MB1; , the control signal in the double-selection and double-pass unit 2051 controls B1-A1 to be turned on, and B1-A2 to be turned on. When the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; The signal is sent to the first switch 2055, and the first switch 2055 transmits the CA signal to the DRX quadrature down converter 2032 of the frequency conversion demodulation circuit 30, and the DRX quadrature down converter 2032 of the frequency conversion demodulation circuit 30 converts the CA signal to SCELL signal modulation and demodulation processing.

In addition, the processing method in the in-band continuous CA mode is similar to that in the non-continuous CA mode and will not be described here.

Example 7. As shown in FIG. 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power splitter 50 through the antenna 4011, and then the first output terminal of the power splitter 50 outputs the CA signal, The CA signal is transmitted to the double-select double-pass unit 2051 through the signal receiving channel PRX-MB1. At this time, when the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; the double-select double-pass unit 2051 transmits the CA signal The PCELL signal in the CA signal is modulated and demodulated by the PRX quadrature down converter of the radio frequency transceiver 20 .

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power divider 50 through the antenna 4011, and then the first output terminal of the power divider 50 outputs the CA signal, and the CA signal is transmitted through the signal receiving channel PRX-MB1. The signal is transmitted to the double-select double-pass unit 2051. At this time, when the value of the register is 0, B1-A2 is turned on, and B2-A1 is turned on. The double-select double-pass unit 2051 sends the CA signal to the first switch 2055. A switch 2055 transmits the CA signal to the PRX quadrature downconverter of the frequency conversion demodulation circuit 30 , and the PRX quadrature downconverter of the frequency conversion demodulation circuit 30 modulates and demodulates the PCELL signal in the CA signal.

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power splitter 50 through the antenna 4011, and then the first output terminal of the power splitter 50 outputs the CA signal, and the CA signal is transmitted through the signal receiving channel PRX-MB2. The signal is transmitted to the double-select double-pass unit 2051. At this time, when the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; the CA signal is sent to the first switch 2055 through the double-select double-pass unit 2051, and the The first switch 2055 transmits the CA signal to the PRX quadrature downconverter of the frequency conversion demodulation circuit 30 , and the PRX quadrature downconverter of the frequency conversion demodulation circuit 30 modulates and demodulates the SCELL signal in the CA signal.

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the power splitter 50 through the antenna 4011, and then the first output terminal of the power splitter 50 outputs the CA signal, and the CA signal is transmitted through the signal receiving channel PRX-MB2. The signal is transmitted to the double-select double-pass unit 2051. At this time, when the register value is 0, B1-A2 is turned on, and B2-A1 is turned on. The CA signal is sent to the PRX of the radio frequency transceiver 20 through the double-select double-pass unit 2051 In the quadrature down converter, the PRX quadrature down converter of the radio frequency transceiver 20 modulates and demodulates the SCELL signal in the CA signal.

Example 8: As shown in Figure 4, when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 4012, and transmits the CA signal to the dual Select the double-pass unit 2051, at this time, when the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; the CA signal is sent to the DRX quadrature down-conversion of the radio frequency transceiver 20 through the double-selected double-pass unit 2051 The DRX quadrature downconverter of the radio frequency transceiver 20 modulates and demodulates the PCELL signal in the CA signal.

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the signal receiving channel DRX-MB1 through the antenna 4012, and transmits the CA signal to the dual-selection-dual-pass unit 2051 through the signal receiving channel DRX-MB1. At this time, When the register value is 0, B1-A2 is turned on, B2-A1 is turned on, the CA signal is sent to the first switch 2055 through the double-selection and double-pass unit 2051, and the first switch 2055 transmits the CA signal to the frequency conversion demodulation circuit The DRX quadrature downconverter 30 modulates and demodulates the PCELL signal in the CA signal by the DRX quadrature downconverter of the frequency conversion demodulation circuit 30 .

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the signal receiving channel DRX-MB2 through the antenna 4012, and transmits the CA signal to the dual-selection-dual-pass unit 2051 through the signal receiving channel DRX-MB2. At this time, When the register value is 1, B1-A1 is turned on, and B2-A2 is turned on; the CA signal is sent to the first switch 2055 through the double-selection and double-pass unit 2051, and the first switch 2055 transmits the CA signal to the frequency conversion demodulation circuit The DRX quadrature down converter of 30 modulates and demodulates the SCELL signal in the CA signal by the DRX quadrature down converter of the frequency conversion demodulation circuit 30 .

When the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the CA signal enters the signal receiving channel DRX-MB2 through the antenna 4012, and transmits the CA signal to the dual-selection-dual-pass unit 2051 through the signal receiving channel DRX-MB2. At this time, When the register value is 0, B1-A2 is turned on, B2-A1 is turned on, and the CA signal is sent to the DRX quadrature down converter of the radio frequency transceiver 20 through the double-selection and double-pass unit 2051, and the DRX of the radio frequency transceiver 20 The quadrature down converter modulates and demodulates the SCELL signal in the CA signal.

It should be noted that the first switch 2055 can also be a single-pole double-throw switch, and its connection structure is shown as the third single-pole double-throw switch 2054 in Figures 6 and 7, and its working principle is similar to that of the first switch 2055 in Figures 3 and 4 , which will not be repeated here. The third SPDT switch 2054 in FIGS. 6 and 7 can selectively transmit the CA signal to the PRX downconverter of the frequency conversion demodulation circuit 30, and transmit the CA signal to the PRX downconverter of the radio frequency transceiver 20; or transmit the CA signal to the PRX downconverter of the radio frequency transceiver 20; The signal is transmitted to the DRX downconverter of the frequency conversion demodulation circuit 30, and the CA signal is transmitted to the DRX downconverter of the radio frequency transceiver 20, thus increasing the flexibility of signal demodulation equipment selection.

The present invention makes improvements to the dual-selection-dual-pass unit 2051 so that when the carrier aggregation CA radio frequency circuit 10 is in the in-band CA mode or when the carrier aggregation CA radio frequency circuit 10 is in the inter-band CA mode, the communication between signal receiving channels can be achieved. Arbitrary switching, compared with the single pole single throw switch in the radio frequency transceiver 20 in the prior art, is more free in the selection of the signal receiving channel.

It should be noted that, as shown in Figures 3, 4, 6, and 7, since each down-conversion unit 2032 of the radio frequency transceiver 20 corresponds to PRX-LB1, PRX-LB2, PRX-MB1, PRX-MB2, PRX-HB1, PRX-HB2 has six signal receiving channels, and every two signal receiving channels are: PRX-LB1 and PRX-LB2, PRX-MB1 and PRX-MB2, PRX-HB1 and PRX-HB2 need to be connected through a group of first single-pole The double-throw switch 2052 and the second single-pole double-throw switch 2053 are used to transmit the CA signal received by any signal receiving channel in the two signal receiving channels to the down-conversion unit 2032 of the radio frequency transceiver 20 or the frequency conversion demodulation circuit 30. The down-conversion unit 2032, therefore, in the solutions shown in FIGS. 3, 4, 6, and 7, the double-select double-pass unit 2051 includes at least three sets of first SPDT switches 2052 and second SPDT switches 2053.

Specifically, as shown in FIG. 2 , the radio frequency transceiver 20 further includes a signal transmission channel 2011 , a gate unit 2056 connected to one end of the signal transmission channel 2011 , and the other end of the gate unit 2056 is connected to the power divider 50 .

It should be noted that, as shown in FIG. 2, the radio frequency transceiver 20 also includes a signal transmission channel 2011, and one end of the signal transmission channel 2011 is connected to the antenna 40 through a power divider 50, wherein the power divider 50 is connected to the antenna 40 through the signal channel, The other end of the signal transmission channel 2011 is connected to one end of the gating unit 2056, the other end of the gating unit 2056 is connected to one end of the first transmitting power amplifier 2024, the other end of the first transmitting power amplifier 2021 is connected to one end of the up-conversion unit 2031, and the up-conversion unit 2031 The other end of the transmission filter 2041 is connected to one end of the transmission filter 2041 and receives the signal transmitted to the antenna through the signal channel with the transmission filter 2041, wherein the power divider 50 is mainly used to combine the transmission signal of the carrier aggregation CA radio frequency circuit 10 with the reception signal isolated to avoid mutual influence.

3, 4, 6, and 7, the signal transmission channel 2011 in the radio frequency transceiver 20 includes TX-DA1, TX-DA2, TX-DA3, and TX-DA4. A power amplifier 60 (English full name: PowerAmplifier, abbreviated as PA) is connected between the signal transmission channel 2011 in the radio frequency transceiver 20 and the power splitter 50 . The power divider 50 and the power amplifier 60 carry out signal transmission through the B1-TX signal channel and the B3-TX signal channel; Signal channel for signal transmission.

The up-conversion unit 2031 is a TX quadrature up-conversion unit (English full name: TransportQuadrature UPconverter, abbreviated as: TX Quadrature UPconverter), which is used to convert the orthogonal I-channel signal and Q-channel signal to be transmitted by the carrier aggregation CA radio frequency circuit 10 into suitable The digital modulation signal (modulated signal or frequency band signal) transmitted in the signal transmitting channel 2011.

The transmit filter 2041 receives the I-channel signal that the carrier aggregation CA radio frequency circuit 10 needs to transmit through TX-BB-IP and TX-BB-IM; receives the signal that the carrier aggregation CA radio frequency circuit 10 needs to transmit through TX-BB-QP and TX-BB-QM The transmitted Q-channel signal.

Specifically, in a carrier aggregation CA radio frequency circuit 10 provided by an embodiment of the present invention, as shown in FIG. 2 , the antenna 40 includes a main antenna 4011 and a diversity antenna 4012 , and the power divider 50 is a quadruplexer.

Wherein, the power splitter 50 may also be composed of two duplexers, wherein each duplexer is used to isolate the received signal and the transmitted signal on the antenna on the duplexer.

It should be noted that the PRX quadrature down-conversion unit in the radio frequency transceiver 20 is connected to the antenna in the peripheral circuit through the signal receiving channels PRX-LB1, PRX-LB2, PRX-MB1, PRX-MB2, PRX-HB1, and PRX-HB2 40 are the main set antenna 4011; the B1-ANT signal channel and the B3-ANT signal channel are formed between the main set antenna 4011 and the radio frequency transceiver 20 to transmit the CA signals corresponding to the B1 and B3 frequency bands respectively.

The DRX quadrature down-conversion unit in the radio frequency transceiver 20 is connected to the antenna 40 in the peripheral circuit through the signal receiving channels DRX-LB1, DRX-LB2, DRX-MB1, DRX-MB2, DRX-HB1, and DRX-HB2, all of which are diversity antennas 4012: A B1-DRX-ANT signal channel and a B3-DRX-ANT signal channel are formed between the diversity antenna 4012 and the radio frequency transceiver 20 to transmit CA signals corresponding to B1 and B3 frequency bands respectively.

Wherein, FIG. 4 is a schematic structural diagram of an embodiment of a carrier aggregation CA radio frequency circuit 10 in which the mobile terminal is in the inter-band CA mode. When the first cell signal S1 of the first frequency band is a PCELL signal and the second cell signal S2 of the second frequency band is When the SCELL signal is used, the transmission of the first cell signal S1 in the first frequency band is completed by the radio frequency transceiver and peripheral circuits, and the second cell signal S2 in the second frequency band does not transmit signals; when the first cell signal S1 in the first frequency band is a SCELL signal And when the second cell signal S2 in the second frequency band is a PCELL signal, the transmission of the second cell signal S2 in the second frequency band is completed by the radio frequency transceiver and peripheral circuits, and the first cell signal S1 in the first frequency band does not transmit signals.

It should be noted that the peripheral circuit is composed of an antenna 40, a power splitter 50, a power amplifier 60, etc.; the antenna 40 is used for receiving and sending the CA signal; the power splitter 50 is used for isolating the transmitted signal from the received signal to avoid They affect each other; the power amplifier 60 is used to amplify the transmission signal in the carrier aggregation CA radio frequency circuit.

In addition, in the carrier aggregation CA radio frequency circuit 10 using two radio frequency transceivers 20 in the prior art, the antennas 40 of the two frequency bands of inter-band CA are respectively connected to the two radio frequency transceivers 20; and the present invention will use two One of the radio frequency transceivers 20 in the carrier aggregation CA radio frequency circuit 10 of the radio frequency transceiver 20 is replaced by a frequency conversion demodulation circuit 30, and the antenna 4011 and the antenna 4012 of the two frequency bands of the inter-band CA are connected to the same radio frequency transceiver 20, which makes it necessary to remove the frequency conversion demodulation circuit 30 when a non-CA product is required, without changing other circuit structures, and has high operability.

A mobile terminal provided in an embodiment of the present invention includes the carrier aggregation CA radio frequency circuit 10 provided in any one of the above embodiments.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. a carrier aggregation CA radio circuit, it is characterised in that include radio frequency transceiver, frequency conversion Demodulator circuit, power splitter and antenna；

The antennal interface of described power splitter is connected with described antenna, and described antenna is configured to receive CA letter Number；

Described radio frequency transceiver includes that the first signal receives passage, secondary signal receives passage, double select bilateral Unit and down-converter unit；First outfan of described power splitter receives passage phase with described first signal Even, the second outfan of described power splitter is connected with described secondary signal reception passage；

Described double first input end selecting bilateral unit connects described first signal and receives passage, described double choosings Second input of bilateral unit connects described secondary signal and receives passage, described double selects the of bilateral unit One outfan connects described down-converter unit, and described double to select the second outfan of bilateral unit to be connected to described Frequency conversion demodulator circuit, wherein, described double selects the first input end of bilateral unit and/or the second input can With under the effect of control signal, with described double the first outfans selecting bilateral unit and/or the second output End turns on；

Described frequency conversion demodulator circuit is configured to receive described double signal selecting bilateral unit to send, and carries out Modulation /demodulation processes.

Carrier aggregation CA radio circuit the most according to claim 1, it is characterised in that

When described CA signal is the first cell signal and the second cell signal in same frequency range, described merit The first outfan dividing device exports described first cell signal and described second cell signal；

Described double bilateral unit is selected to be configured to described double select the first input end of bilateral unit to simultaneously turn on Described double the first outfan selecting bilateral unit and described double the second outfan selecting bilateral unit；Under described Converter unit is configured to demodulate described first cell signal；Described frequency conversion demodulator circuit is configured to demodulation Described second cell signal.

Carrier aggregation CA radio circuit the most according to claim 1, it is characterised in that

When described CA signal is the first cell signal and the second cell signal in different frequency range, described merit The first outfan dividing device exports described first cell signal, and the second outfan of described power splitter exports institute State the second cell signal；

Described it is configured to that described double first input end conducting selecting bilateral unit is described double selects bilateral unit The first outfan, described double the second inputs conductings selecting bilateral unit are described double selects the of bilateral unit Two outfans；Described down-converter unit is configured to demodulate described first cell signal；Described frequency conversion demodulates Circuit is configured to demodulate described second cell signal.

4. according to the carrier aggregation CA radio circuit described in Claims 2 or 3, it is characterised in that Described pair is selected bilateral unit to include the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT), and described first is single First common port of double-pole double throw switch connects described double the first outfan selecting bilateral unit, and described first is single First selection end of double-pole double throw switch connects described double first input end selecting bilateral unit, and described first is single Second selection end of double-pole double throw switch connects described double the second input selecting bilateral unit；

Second common port of described second single-pole double-throw switch (SPDT) connects and described double selects the second defeated of bilateral unit Going out end, the first selection end of described second single-pole double-throw switch (SPDT) connects and described double selects the first defeated of bilateral unit Entering end, the second selection end of described second single-pole double-throw switch (SPDT) connects and described double selects the second defeated of bilateral unit Enter end.

Carrier aggregation CA radio circuit the most according to claim 4, it is characterised in that described Carrier aggregation CA radio circuit also includes the first switch；

First described double the second outfans selecting bilateral unit of end connection of described first switch, described first Second end of switch connects described frequency conversion demodulator circuit.

Carrier aggregation CA radio circuit the most according to claim 4, it is characterised in that described Carrier aggregation CA radio circuit also includes the 3rd single-pole double-throw switch (SPDT)；

First end of described 3rd single-pole double-throw switch (SPDT) connects described double the first outfan selecting bilateral unit, Second end of described 3rd single-pole double-throw switch (SPDT) connects described double the second outfan selecting bilateral unit, described The common port of the 3rd single-pole double-throw switch (SPDT) connects described frequency conversion demodulator circuit.

Carrier aggregation CA radio circuit the most according to claim 1, it is characterised in that described Radio frequency transceiver, also includes signal transmission channel, the gating list being connected with described signal transmission channel one end The other end of gating unit first, described is connected to described power splitter.

Carrier aggregation CA circuit the most according to claim 1, it is characterised in that described antenna bag Including main collection antenna and diversity antenna, described power splitter is four multiplexers.

9. a mobile terminal, it is characterised in that include that the carrier wave described in above-mentioned 1-8 any one gathers Close CA radio circuit.