CN114614838A

CN114614838A - Radio frequency system and communication equipment

Info

Publication number: CN114614838A
Application number: CN202210148131.9A
Authority: CN
Inventors: 吴长剑
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-06-10
Anticipated expiration: 2042-02-17
Also published as: CN114614838B

Abstract

The application relates to a radio frequency system and communication equipment, which comprise a first radio frequency module, a second radio frequency module and a first impedance matching module, wherein the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, a first antenna and a second antenna and is used for correspondingly gating a first target matching network which is respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna; and when the second antenna is a main set antenna, correspondingly gating a second target matching network respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna. Therefore, the radio frequency system can gate the corresponding first target matching network or the second target matching network according to the switching condition of the main set antenna, so that the first impedance matching module matches corresponding impedance adjustment on different antenna switching paths, impedance adaptation is ensured, and radio frequency performance is improved.

Description

Radio frequency system and communication equipment

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a radio frequency system and a communication device.

Background

With the development of antenna technology, in order to improve the communication quality of a radio frequency system, the radio frequency system is generally configured to support an antenna switching function. However, in the process of antenna switching, since the rf path is changed and the routing also has differences, there is a risk of impedance mismatch under the antenna switching, which may result in a reduction in the rf performance.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can avoid the risk of impedance mismatch under antenna switching and optimize radio frequency performance.

A radio frequency system, comprising:

the first radio frequency module is connected with the radio frequency transceiver and used for supporting the receiving processing of the radio frequency signals;

the second radio frequency module is connected with the radio frequency transceiver, switchably connected with the first radio frequency module to the first antenna and the second antenna, and used for supporting the receiving processing of the radio frequency signals;

the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, the first antenna and the second antenna, comprises a first target matching network and a second target matching network, and is used for correspondingly gating the first target matching network which is respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna and the second antenna; and correspondingly gating a second target matching network respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the second antenna is a main set antenna so as to perform second impedance matching on the radio frequency signals received by the first antenna and the second antenna.

A communication device, comprising:

a radio frequency system as described above.

The radio frequency system and the communication device comprise a first radio frequency module, a second radio frequency module and a first impedance matching module, wherein the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, a first antenna and a second antenna and is used for correspondingly gating a first target matching network respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna and the second antenna; and when the second antenna is a main set antenna, correspondingly gating a second target matching network respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna so as to perform second impedance matching on the radio frequency signals received by the first antenna and the second antenna. Therefore, the radio frequency system can gate the corresponding first target matching network or the second target matching network according to the switching condition of the main set antenna, so that the first impedance matching module matches corresponding impedance adjustment on different antenna switching paths, impedance adaptation is ensured, and the radio frequency performance of the radio frequency system is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram illustrating an exemplary RF system;

FIG. 2 is a second schematic diagram of an embodiment of an RF system;

FIG. 3 is a third exemplary diagram of an RF system;

FIG. 4 is a fourth schematic diagram of an embodiment of an RF system;

FIG. 5 is a fifth schematic diagram of an embodiment of a radio frequency system;

FIG. 6 shows a sixth exemplary embodiment of an RF system;

FIG. 7 is a seventh schematic diagram of an exemplary RF system;

FIG. 8 is an eighth schematic block diagram of an exemplary RF system;

fig. 9 is a schematic structural diagram of a communication device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The radio frequency system according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing devices connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device.

As shown in fig. 1, in one embodiment, a radio frequency system provided in the embodiment of the present application includes: a first rf module 11, a second rf module 12 and a first impedance matching module 13.

The first radio frequency module 11 is connected with the radio frequency transceiver 10 and is used for supporting the receiving processing of the radio frequency signal; the second rf module 12 is connected to the rf transceiver 10, and switchably connected to the first antenna ANT1 and the second antenna ANT2 with the first rf module 11, for supporting receiving processing of rf signals.

A first impedance matching module 13, connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, respectively, and including a first target matching network and a second target matching network, for gating the first target matching network connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, respectively, when the first antenna ANT1 is a dominant antenna, so as to perform a first impedance matching on the radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is a main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first rf module 11, the second rf module 12, the first antenna ANT1, and the second antenna ANT2, so as to perform second impedance matching on the rf signals received by the first antenna ANT1 and the second antenna ANT 2.

The first radio frequency module 11 and the second radio frequency module 12 may be configured to support receiving processing of radio frequency signals, where the receiving processing may be understood as low-noise power amplification processing; the first antenna ANT1 and the second antenna ANT2 are both configured to implement transceiving processing of radio frequency signals, which may be, for example, 4G LTE radio frequency signals and 5G NR radio frequency signals. The first antenna ANT1 and the second antenna ANT2 may be formed using any suitable type of antenna. For example, each branch antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. In the present embodiment, the type of the antenna is not further limited.

The first radio frequency module 11 and the second radio frequency module 12 are switchably connected to the first antenna ANT1 and the second antenna ANT2, so that a master antenna of a target can be determined in the first antenna ANT1 and the second antenna ANT2, and the radio frequency module connected to the master antenna of the target can perform transmission and master reception, so as to distribute uplink signals on an antenna with better antenna efficiency, and ensure reliability of the uplink signals to improve communication performance of the radio frequency system.

The first impedance matching module 13 is connected to the first rf module 11, the second rf module 12, the first antenna ANT1, and the second antenna ANT2, respectively. The first impedance matching module 13 includes a first target matching network and a second target matching network, and the first target matching network can be respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2 when gating, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; the second target matching network may be connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, respectively, during gating, so as to perform second impedance matching on the radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2.

When the first antenna ANT1 is a dominant set antenna, the first target matching network is gated to perform first impedance matching on the radio frequency signal on the path between the radio frequency module received by the dominant set and the first antenna ANT1 and the radio frequency signal on the path between the radio frequency module received by the diversity and the second antenna ANT2 (fig. 2 takes the radio frequency module 11 as the dominant set receiving radio frequency module as an example, the simple schematic network formed by the a matching path and the b matching path shown in fig. 2 can be understood as the first target matching network); when the second antenna ANT2 is the main set antenna, the second target matching network is gated to perform second impedance matching on the rf signal on the path between the main set receiving rf module and the second antenna ANT2 and the rf signal on the path between the diversity receiving rf module and the first antenna ANT1 (fig. 3 takes the first rf module 11 as the main set receiving rf module as an example, the simple schematic network formed by the c matching path and the d matching path shown in fig. 3 can be understood as the second target matching network).

Therefore, when the first rf module 11 and the second rf module 12 perform the switching of the connection of the main set antenna and the rf path on the rf system changes, the first impedance matching module 13 may gate the corresponding first target matching network or the second target matching network according to the switching condition of the main set antenna, so that the target matching network also changes correspondingly with the change of the rf circuit, so as to match the corresponding impedance adjustment on different antenna switching paths, ensure the adaptation of the impedance, and avoid the impedance mismatch caused by the switching of the antenna, thereby reducing the performance.

It should be noted that, when the first antenna ANT1 is a main set antenna, since a radio frequency path between the first antenna ANT1 and the first radio frequency module 11 is different from a radio frequency path between the second antenna ANT2 and the second radio frequency module 12, a first impedance matching performed by the first target matching network on the radio frequency path between the first antenna ANT1 and the first radio frequency module 11 is different from a first impedance matching performed by the first target matching network on the radio frequency path between the second antenna ANT2 and the second radio frequency module 12; it is to be understood that when the second antenna ANT2 is a main set antenna, the second impedance matching of the second target matching network to the rf path between the second antenna ANT2 and the first rf module 11 is different from the second impedance matching of the second target matching network to the rf path between the first antenna ANT1 and the second rf module 12. Correspondingly, the first target matching network and the second target matching network may respectively include at least two matching units, so that the same target matching network may form two matching paths to perform corresponding impedance adjustment on the radio frequency signals on different paths, for example, the first target matching network includes two matching units, one matching unit in the first target matching network may respectively form one matching path with the first radio frequency module 11 and the first antenna ANT1, and the other matching unit may respectively form another matching circuit with the second radio frequency module 12 and the second antenna ANT 2. The impedance matching parameters corresponding to the first impedance matching and the second impedance matching may be set and adjusted according to the actual antenna type and the line condition of the path, which is not limited herein.

The radio frequency system provided in this embodiment includes a first radio frequency module 11, a second radio frequency module 12, and a first impedance matching module 13, where the first impedance matching module 13 is connected to the first radio frequency module 11, the second radio frequency module 12, a first antenna ANT1, and a second antenna ANT2, respectively, and is configured to gate a first target matching network connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, respectively, when the first antenna ANT1 is a dominant antenna, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is a main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first rf module 11, the second rf module 12, the first antenna ANT1, and the second antenna ANT2, so as to perform second impedance matching on the rf signals received by the first antenna ANT1 and the second antenna ANT 2. Therefore, the first impedance matching module 13 may gate the corresponding first target matching network or second target matching network according to the switching of the main set antenna, so as to match the corresponding impedance adjustment on different antenna switching paths, ensure the impedance adaptation, and improve the radio frequency performance of the radio frequency system.

In some embodiments, the first rf module 11 is configured to support transmission and main set reception of rf signals, and the second rf module 12 is configured to support diversity reception of rf signals; wherein: the first impedance matching module 13 is configured to gate a first path between the first radio frequency module 11, the first target matching network, and the first antenna ANT1 and a second path between the second radio frequency module 12, the first target matching network, and the second antenna ANT2 when the first antenna ANT1 is a main set antenna; and is configured to gate a third path between the first radio frequency module 11 and the second target matching network and the second antenna ANT2 and a fourth path between the second radio frequency module 12 and the second target matching network and the first antenna ANT1 when the second antenna ANT2 is a dominant set antenna.

Wherein, when the first radio frequency module 11 is used to support transmission and master set reception of radio frequency signals, the first radio frequency module 11 is connected with the first antenna ANT1 as a master set antenna or the second antenna ANT2 as a master set antenna through the first impedance matching module 13. The first rf module 11 is configured with a transmitting path and a receiving path, wherein the transmitting path is used for supporting power amplification processing of the rf signal output by the rf transceiver 10 and outputting the rf signal to the first impedance matching module 13, and the receiving path is used for supporting low noise amplification processing of the rf signal after impedance matching and outputting the rf signal to the rf transceiver 10, so as to implement transceiving processing of the rf signal. The first rf module 11 can be understood as a Power amplifier module (PA Mid) integrating a Power amplifier, a duplexer, and a low noise amplifier. The first rf module 11 may be integrated as a chip, and each port configured on the chip may be understood as an rf pin of the PA Mid device.

Wherein, when the second radio frequency module 12 is used to support diversity reception of radio frequency signals, the second radio frequency module 12 is connected with the first antenna ANT1 as a diversity antenna or the second antenna ANT2 as a diversity antenna through the first impedance matching network. The second rf module 12 is configured with a receiving path for supporting low-noise amplification processing of the impedance-matched rf signal and outputting the rf signal to the rf transceiver 10, thereby implementing receiving processing of the rf signal. The second radio frequency module 12 may be understood as a low noise amplification module, which may specifically include a filter and a low noise amplifier.

When the first rf module 11 is configured to support transmission and main set reception of rf signals, and the second rf module 12 is configured to support diversity reception of rf signals, the first impedance matching module 13 is configured to gate a first path between the first rf module 11, the first target matching network, and the first antenna ANT1, and a second path between the second rf module 12, the first target matching network, and the second antenna ANT2 when the first antenna ANT1 is a main set antenna; therefore, the first target matching network may perform corresponding impedance adjustment on the radio frequency signal output by the first radio frequency module 11, and output the radio frequency signal to the first antenna ANT1 for transmission, and perform corresponding impedance adjustment on the radio frequency signal received by the first antenna ANT1 master set, and output the radio frequency signal to the first radio frequency module 11; the first target matching network may further perform corresponding impedance adjustment on the radio frequency signal received by the second antenna ANT2 in a diversity mode, and then output the radio frequency signal to the second radio frequency module 12. The first impedance matching module 13 is further configured to gate a third path between the first radio frequency module 11, the second target matching network, and the second antenna ANT2 and a fourth path between the second radio frequency module 12, the second target matching network, and the first antenna ANT1 when the second antenna ANT2 is a main set antenna; therefore, the first target matching network may perform corresponding impedance adjustment on the radio frequency signal output by the first radio frequency module 11, and output the radio frequency signal to the second antenna ANT2 for transmission, and perform corresponding impedance adjustment on the radio frequency signal received by the second antenna ANT2 master set, and output the radio frequency signal to the first radio frequency module 11; the first target matching network may further perform corresponding impedance adjustment on the radio frequency signal received by the first antenna ANT1 in a diversity mode, and then output the radio frequency signal to the second radio frequency module 12.

In some embodiments, when the first rf module 11 is configured to support transmission and main set reception of rf signals and the second rf module 12 is configured to support diversity reception of rf signals, as shown in fig. 4, the first target matching network includes a first matching unit 131 and a second matching unit 132, the second target matching network includes a third matching unit 133 and a fourth matching unit 134, and the first impedance matching module 13 further includes: a first gating unit 135 and a second gating unit 136.

A first gating unit 135 connected to the first rf module 11, the second rf module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134, respectively; the second gating cell 136 is connected to the first matching cell 131, the second matching cell 132, the third matching cell 133, the fourth matching cell 134, the first antenna ANT1, and the second antenna ANT2, respectively.

The first and

second gating units

135 and 136 are configured to gate the first matching unit 131 respectively connected to the first rf module 11 and the first antenna ANT1, and the second matching unit 132 respectively connected between the second rf module 12 and the second antenna ANT2, in common when the first antenna ANT1 is a main set antenna; the first and

second gating units

135 and 136 are further configured to gate the third matching unit 133 connected to the first and second rf modules 11 and 2, respectively, and the fourth matching unit 134 connected to the second and first rf modules 12 and ANT1, respectively, in common when the second antenna ANT2 is a main set antenna.

The first matching unit 131 and the second matching unit 132 are matching units on different radio frequency paths in the same target matching network, and are configured to perform impedance adjustment on radio frequency signals on the radio frequency paths when the first antenna ANT1 is a main set antenna; the third matching unit 133 and the fourth matching unit 134 are matching units on different radio frequency paths in the same target matching network, and are configured to perform impedance adjustment on radio frequency signals on the radio frequency paths when the second antenna ANT2 is a dominant set antenna. Due to the fact that different radio frequency paths have different routing, corresponding to the difference existing in routing and the like, the impedance adjusting values of different matching units can be different, and debugging is specifically carried out according to the actual path condition, and therefore the impedance adaptability is improved.

The first gating unit 135 is connected to the first rf module 11, the second rf module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134, respectively; a second gating unit 136 respectively connected to the first matching unit 131, the second matching unit 132, the third matching unit 133, the fourth matching unit 134, the first antenna ANT1, and the second antenna ANT2, so that, through the first gating unit 135 and the second gating unit 136, on one hand, the first rf module 11 and the second rf module 12 can be selectively connected to the first antenna ANT1 and the second antenna ANT2 in a switchable manner, and a master antenna of a target is determined from the first antenna ANT1 and the second antenna ANT2, so that the rf module connected to the master antenna of the target can perform transmission and master reception, so as to distribute uplink signals to antennas with better antenna efficiency, and thus the reliability of uplink signals can be ensured to improve the communication performance of the rf system; on the other hand, the impedance matching units corresponding to the switching paths of different main set antennas can be gated so as to perform corresponding impedance adjustment on different antenna switching paths, ensure impedance adaptation and improve the radio frequency performance of the radio frequency system.

Specifically, when the first antenna ANT1 is a main set antenna, the first gating unit 135 and the second gating unit 136 are configured to gate the first matching unit 131 respectively connected to the first rf module 11 and the first antenna ANT1 together to conduct a first path between the first rf module 11, the first matching unit 131, and the first antenna ANT1, where the first rf module 11 is connected to the first antenna ANT1 and impedance-adjusted by the first matching unit 131, so that a load impedance of the first rf module 11 matches an impedance of the first antenna ANT 1; and a common gate respectively connected to the second matching unit 132 between the second rf module 12 and the second antenna ANT2 to turn on the second path between the second rf module 12, the second matching unit 132, and the second antenna ANT2, wherein the second rf module 12 is connected to the second antenna ANT2 and impedance-adjusted by the second matching unit 132, so that the load impedance of the second rf module 12 matches the impedance of the second antenna ANT 2. Here, the first path and the second path may be understood as two through-state paths in the embodiment shown in fig. 4, and matching impedance may be ensured on the two through-state paths by the first matching unit 131 and the second matching unit 132.

Specifically, when the second antenna ANT2 is a main set antenna, the first gating unit 135 and the second gating unit 136 together gate the third matching unit 133 connected to the first rf module 11 and the second antenna ANT2, respectively, so as to conduct a third path between the first rf module 11, the third matching unit 133, and the second antenna ANT2, the first rf module 11 is connected to the second antenna ANT2 and impedance adjustment is performed by the third matching unit 133, so that the load impedance of the first rf module 11 matches the impedance of the second antenna ANT 2; and a fourth matching unit 134 commonly gated and respectively connected to the second rf module 12 and the first antenna ANT1 to turn on a fourth path among the second rf module 12, the fourth matching unit 134 and the first antenna ANT1, wherein the second rf module 12 is connected to the first antenna ANT1 and impedance-adjusted by the fourth matching unit 134, so that a load impedance of the second rf module 12 matches an impedance of the first antenna ANT 1. Among them, the third path and the fourth path may be understood as two cross-state paths in the embodiment shown in fig. 4, and the matching impedance on the two cross-state paths may be ensured by the third matching unit 133 and the fourth matching unit 134.

Therefore, the normal switching of the cross state and the calling scenario of the matching network can be realized through the switching of the first gating unit 135 and the second gating unit 136, the direct state and the cross state are separated to form respective independent impedance matching networks, the matching network of the direct state is used for adjusting the size of the path matching impedance in the direct state, the matching network of the cross state is used for adjusting the size of the path matching impedance in the cross state, the risk of path matching mismatch in the cross state can be avoided while the impedance matching in the direct state is in a good state, and the radio frequency performance in the two states can be simultaneously ensured.

It should be noted that, in order to reduce the occupied area of the matching unit in the radio frequency system and reduce the cost, only two matching units may be arranged in each matching network, but in other cases where modulation is required, the matching units may not be limited to two, and may be specifically adjusted according to actual requirements, for example, to avoid damage to the matching units, two first matching units 131 and two second matching units 132 may also be arranged, and when impedance matching is required to be performed by the first target matching network, one first matching unit 131 and one second matching unit 132 are selected from the two first matching units 131 and the two second matching units 132.

In the above embodiments, each of the first gating unit 135 and the second gating unit 136 may include a switching device, and the matching units on different paths are gated by the switching device, for example, each of the first gating unit 135 and the second gating unit 136 may include a single-pole double-throw switch or a double-pole four-throw switch, and the selection of the devices may be determined based on the area and the layout of the devices.

Optionally, as shown in fig. 5 (fig. 5 illustrates a module receiving by taking the first radio frequency module 11 as a main set), the first gating unit 135 includes: a first single pole double throw switch SPDT1 and a second single pole double throw switch SPDT 2.

A first single-pole double-throw switch SPDT1, wherein a first end (see the contact 1 of the SPDT1 in the figure) of the first single-pole double-throw switch SPDT1 is connected with the first radio frequency module 11, and two second ends (see the contact 2 and the contact 3 of the SPDT1 in the figure) of the first single-pole double-throw switch are respectively connected with the first matching unit 131 and the third matching unit 133 in a one-to-one correspondence manner; and a second single-pole double-throw switch, wherein a first end (see a contact 1 of the SPDT2 in the figure) of the second single-pole double-throw switch is connected with the second radio frequency module 12, and two second ends (see a contact 2 and a contact 3 of the SPDT2 in the figure) of the second single-pole double-throw switch are respectively connected with the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence manner.

Specifically, the gate gates the path connected between the first rf module 11 and the first matching unit 131 when the first SPDT1 gates the contact 1 and the contact 2, respectively, and the gate gates the path between the second rf module 12 and the second matching unit 132 when the second SPDT2 gates the contact 1 and the contact 2. The gate gates are connected to paths between the first rf module 11 and the third matching unit 133 when the first SPDT1 gates the contact 1 and the contact 3, respectively, and the gate gates are connected to paths between the second rf module 12 and the fourth matching unit 134 when the second SPDT2 gates the contact 1 and the contact 3.

Alternatively, as shown in fig. 5, the second gating unit 136 includes: a first end of a third single-pole double-throw switch SPDT3, a first end of the third single-pole double-throw switch SPDT3 is connected with a first antenna ANT1, and two second ends of the third single-pole double-throw switch SPDT3 are correspondingly connected with the first matching unit 131 and the fourth matching unit 134 one by one; a first end of the fourth SPDT4 and a first end of the fourth SPDT4 are connected to the second antenna ANT2, and two second ends of the fourth SPDT4 are respectively connected to the second matching unit 132 and the third matching unit 133 in a one-to-one correspondence manner.

Specifically, when the third SPDT3 gates the contact 1 and the contact 2 and the fourth SPDT4 gates the contact 1 and the contact 2, the third SPDT3 and the fourth SPDT4 correspondingly gate a path between the first matching unit 131 and the first antenna ANT1 and gate a path between the second matching unit 132 and the second antenna ANT2, respectively. When the third SPDT3 gates the contact 1 and the contact 3 and the fourth SPDT4 gates the contact 1 and the contact 3, the third SPDT3 and the fourth SPDT4 correspondingly gate a path between the fourth matching unit 134 and the first antenna ANT1 and gate a path between the third matching unit 133 and the second antenna ANT2, respectively.

Optionally, as shown in fig. 6, the first gating unit 135 may further include: a first double pole, four throw switch DP4T 1.

The first ends of the first double-pole four-throw switch DP4T1 and the first end of the first double-pole four-throw switch DP4T1 are respectively connected to the first rf module 11 and the second rf module 12 in a one-to-one correspondence manner, and the second ends of the first double-pole four-throw switch DP4T1 are respectively connected to the first matching unit 131, the third matching unit 133, the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence manner. Specifically, when the contact 1 of the first double pole and four throw switch DP4T1 gates the contact 3 and the contact 2 gates the contact 6, the first double pole and four throw switch DP4T1 gates the first matching unit 131 connected to the first rf module 11 and the first antenna ANT1, respectively, and the second matching unit 132 connected between the second rf module 12 and the second antenna ANT2, respectively. When the contact 1 of the first double pole four throw switch DP4T1 gates the contact 4 and the contact 2 gates the contact 5, the first double pole four throw switch DP4T1 gates the third matching unit 133 connected to the first rf module 11 and the second antenna ANT2, respectively, and the fourth matching unit 134 connected between the second rf module 12 and the first antenna ANT1, respectively.

Alternatively, as shown in fig. 6, the second gating unit 136 includes: two first ends of the second double-pole four-throw switch DP4T2 and the second double-pole four-throw switch DP4T2 are respectively connected with the first antenna ANT1 and the second antenna ANT2 in a one-to-one correspondence manner, and four second ends of the second double-pole four-throw switch DP4T2 are respectively connected with the first matching unit 131, the third matching unit 133, the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence manner. Specifically, when the contact 1 of the second double pole four throw switch DP4T2 gates the contact 3 and the contact 2 gates the contact 6, the second double pole four throw switch DP4T2 gates a path between the first matching unit 131 and the first antenna ANT1, and gates a path between the second matching unit 132 and the second antenna ANT 2; when the contact 1 of the second double pole four throw switch DP4T2 gates the contact 4 and the contact 2 gates the contact 5, the second double pole four throw switch DP4T2 gates a path between the fourth matching unit 134 and the first antenna ANT1 and gates a path between the third matching unit 133 and the second antenna ANT 2.

In the above embodiments, the first matching unit 131, the second matching unit 132, the third matching unit 133, the fourth matching unit 134, and the like may all adjust the impedance in a series-parallel manner through a tunable inductor, a capacitor, a resistor, and the like. The tunable inductor, the capacitor, the resistor, and the like may form different types of impedance matching units in a series-parallel connection manner, such as a pi-type impedance matching unit, an L-type impedance matching unit, a T-type impedance matching unit, and the like. Optionally, at least one of the first matching unit 131, the second matching unit 132, the third matching unit 133 and the fourth matching unit 134 is a pi-type impedance matching unit. Alternatively, each of the pi-type impedance matching units may be as shown in the figure (where Z may be an inductor, a capacitor, a resistor, or the like), and further alternatively, as shown in fig. 5 and fig. 6, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134 are all pi-type impedance matching units.

In some embodiments, the radio frequency transceiver 10 is further connected to the controlled terminal of the first gating unit 135 and the controlled terminal of the second gating unit 136, respectively, and is configured to configure a master antenna according to quality information of radio frequency signals received by the first antenna ANT1 and the second antenna ANT2, and control the first gating unit 135 and the second gating unit 136 to jointly gate the first target matching network or jointly gate the second target matching network according to the master antenna. Specifically, the radio frequency transceiver 10 determines and configures a master antenna from the first antenna ANT1 and the second antenna ANT2 according to quality information of radio frequency signals received by the first antenna ANT1 and the second antenna ANT2, controls the first gating unit 135 and the second gating unit 136 to gate the first target matching network together when the first antenna ANT1 is configured as the master antenna, and controls the first gating unit 135 and the second gating unit 136 to gate the second target matching network together when the second antenna ANT2 is configured as the master antenna.

Here, the controlled terminal of the first gating unit 135 may be understood as a controlled terminal of an internal switch of the first gating unit 135, and the controlled terminal of the second gating unit 136 may be understood as a controlled terminal of an internal switch of the second gating unit 136. The radio frequency transceiver 10 controls gating conditions of the first gating unit 135 and the second gating unit 136 by controlling the controlled terminals of the first gating unit 135 and the second gating unit 136.

The quality information may include raw and processed information associated with wireless performance metrics of the Signal, such as Signal Strength, Received Power, Reference Signal Received Power (RSRP), Received Signal Strength (RSSI), Signal to Noise Ratio (SNR), Rank of the MIMO channel matrix (Rank), Carrier to Interference and Noise Ratio (RS-CINR), frame error rate, bit error rate, Reference Signal Received Quality (RSRQ), and the like. Further alternatively, the radio frequency transceiver 10 may store in advance configuration information of connection of each circuit with each antenna. The configuration information may include identification information of the antenna, identification information of each circuit, and control logic information of each switch on the rf path between the first rf module 11 and the second rf module 12 and the different switchable antennas.

The following description will be made by taking network information as received signal strength: the first antenna ANT1 may be configured as a default primary set antenna, and the second antenna ANT2 may be configured as a default diversity antenna; wherein: if the difference between the second signal strength of the rf signal received by the second antenna ANT2 and the first signal strength of the rf signal received by the first antenna ANT1 is greater than or equal to the preset threshold in the preset time period, the second antenna ANT2 is configured as a main set antenna, and the first antenna ANT1 is configured as a diversity antenna.

Specifically, when the first antenna ANT1 is configured as a default main set antenna and the second antenna ANT2 is configured as a default diversity antenna, the radio frequency transceiver 10 receives radio frequency signals received by the first antenna ANT1 and the second antenna ANT2 through the first radio frequency module 11 and the second radio frequency module 12, respectively, and controls switching of the antennas according to a first signal strength of the radio frequency signal received by the first antenna ANT1 and a second signal strength of the radio frequency signal received by the second antenna ANT 2. More specifically, if the difference between the second received signal strength and the first received signal strength is greater than or equal to the preset threshold value within the preset time, the second antenna ANT2 is used as the dominant set antenna. After the target antenna is determined, the rf transceiver 10 may control an associated logic switch of the rf system to turn on a transceiving path between the second antenna ANT2 and the first rf module 11, so as to implement rf transmission and main set reception by using the second antenna ANT2, thereby improving communication quality of the rf signal. If the difference is smaller than the preset threshold, the first antenna ANT1 is continuously used as the main set antenna, and the current working state is maintained.

The preset threshold values are all numerical values larger than zero, and the size of the preset threshold values can be set according to needs. By setting the judgment condition of the preset threshold, frequent switching between the antennas caused by the fact that the signal receiving strength of the antennas is likely to be constantly changing can be prevented, and further the influence of the transmission efficiency of the antennas can be reduced.

In some embodiments, the number of the first antennas ANT1 is multiple and the number of the first target matching networks is multiple, and the multiple first target matching networks are in one-to-one correspondence with the multiple first antennas ANT 1; wherein: the first impedance matching module 13 is further configured to gate a corresponding first target matching network when a first antenna ANT1 of the plurality of first antennas ANT1 is a main set antenna. Specifically, the first target matching network corresponding to each first antenna ANT1 as the main set antenna is configured in advance, so that when one of the first antennas ANT1 is configured as the main set antenna, the corresponding first target matching network is selectively turned on. Thus, the main set antenna may be selected among more first antennas ANT1, and each antenna switching case is matched to a corresponding impedance adjustment to further improve radio frequency performance.

In some embodiments, the number of the second antennas ANT2 is multiple and the number of the second target matching networks is multiple, and the multiple second target matching networks are in one-to-one correspondence with the multiple second antennas ANT 2; wherein: the first impedance matching module 13 is further configured to gate a corresponding second target matching network when a second antenna ANT2 of the plurality of second antennas ANT2 is a main set antenna. Specifically, the second target matching network corresponding to each second antenna ANT2 as the main set antenna is configured in advance, so that when one of the second antennas ANT2 is configured as the main set antenna, the corresponding second target matching network is selectively turned on. Thus, the main set antenna may be selected among more second antennas ANT2, and each antenna switching case is matched to a corresponding impedance adjustment to further improve radio frequency performance.

It should be noted that, when the number of the first antennas ANT1 is plural, the number of the second antennas ANT2 may be one or more; when the number of the second antennas ANT2 is plural, the number of the first antennas ANT1 may be one or plural, and is not limited herein. When the number of the first antenna ANT1 and/or the second antenna ANT2 is multiple, the first gating unit 135 in the first impedance matching module 13 may correspondingly include multiple single-pole double-throw switches or double-pole double-throw switches, and the second gating unit 136 may correspondingly include multiple single-pole double-throw switches or double-pole double-throw switches, so as to gate different target matching networks through the first gating unit 135 and the second gating unit 136 and to conduct different radio frequency paths.

In some embodiments, as shown in fig. 7, the radio frequency system further comprises: a second impedance matching block 14 and/or a third impedance matching block 15.

The second impedance matching module 14 is disposed between the first antenna ANT1 and the first impedance matching module 13, and is configured to perform impedance matching on the radio frequency signal received by the first antenna ANT 1. Therefore, the impedance of the path where the antenna is located is further adjusted by the second impedance matching module 14, so as to further improve the impedance matching between the first antenna ANT1 and the radio frequency module connected to the antenna.

The third impedance matching module 15 is disposed between the second antenna ANT2 and the first impedance matching module 13, and is configured to perform impedance matching on the radio frequency signal received by the second antenna ANT 2.

Alternatively, the second impedance matching module 14 and the third impedance matching module 15 may perform impedance adjustment in a series-parallel manner through tunable inductance, capacitance, resistance, and the like. The tunable inductor, the capacitor, the resistor, and the like may form different types of impedance matching units in a series-parallel connection manner, such as a pi-type impedance matching unit, an L-type impedance matching unit, a T-type impedance matching unit, and the like. Optionally, at least one of the second impedance matching block 14 and the third impedance matching block 15 is a pi-type impedance matching unit. Optionally, each pi-type impedance matching unit may be as shown in the figure (where Z may be an inductor, a capacitor, a resistor, or the like), and optionally, the second impedance matching module 14 and the third impedance matching module 15 are both pi-type impedance matching units. Further alternatively, the pi-type impedance matching units of the second impedance matching block 14 and the third impedance matching block 15 may be as shown in fig. 8.

The division of the modules and units in the radio frequency system is only for illustration, and in other embodiments, the radio frequency system may be divided into different modules as needed to complete all or part of the functions of the radio frequency system.

The embodiment of the present application further provides a communication device, which may include the radio frequency system in any embodiment, where when the first antenna ANT1 is a dominant antenna, the radio frequency system correspondingly gates a first target matching network respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is a main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first rf module 11, the second rf module 12, the first antenna ANT1, and the second antenna ANT2, so as to perform second impedance matching on the rf signals received by the first antenna ANT1 and the second antenna ANT 2. Therefore, the radio frequency system may gate the corresponding first target matching network or second target matching network according to the requirement of the antenna switching of the main set, so that the first impedance matching module 13 matches the corresponding impedance adjustment on different antenna switching paths. Therefore, the communication equipment can ensure the adaptation of impedance, and improve the radio frequency performance, thereby improving the experience of users.

Further, as shown in fig. 9, the communication device is exemplified as a handset 20, and specifically, as shown in fig. 9, the handset 20 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 20 shown in fig. 9 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in fig. 9 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

The memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in memory 21 include an operating system 211, a communications module (or set of instructions) 212, a Global Positioning System (GPS) module (or set of instructions) 213, and the like.

Processor 22 and other control circuitry, such as control circuitry in radio frequency system 24, may be used to control the operation of handset 20. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management modules, audio codec chips, application specific integrated circuits, and the like.

Processor 22 may be configured to implement a control algorithm that controls the use of the antenna in handset 20. The processor 22 may also issue control commands for controlling various switches in the radio frequency system 24, and the like.

I/O subsystem 26 couples input/output peripheral devices on handset 20, such as a keypad and other input control devices, to peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient and other sensors, light emitting diodes and other status indicators, data ports, and the like. Illustratively, a user may control the operation of handset 20 by supplying commands through I/O subsystem 26, and may receive status information and other output from handset 20 using the output resources of I/O subsystem 26. For example, a user pressing button 261 may turn the phone on or off.

The rf system 24 may be any of the rf systems described in any of the preceding embodiments.

In the description herein, reference to the description of "one of the embodiments," "optionally," or the like means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic depictions of the above terms do not necessarily refer to the same embodiment or example.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A radio frequency system, comprising:

2. The radio frequency system of claim 1, wherein the first radio frequency module is configured to support transmission and dominant set reception of the radio frequency signal, and the second radio frequency module is configured to support diversity reception of the radio frequency signal; wherein:

the first impedance matching module is used for gating the first radio frequency module, the first target matching network, a first path between the first antennas and a second path between the second radio frequency module, the first target matching network and the second antennas when the first antenna is the main set antenna; and the antenna unit is configured to gate a third path between the first radio frequency module, the second target matching network, and the second antenna and a fourth path between the second radio frequency module, the second target matching network, and the first antenna when the second antenna is a main set antenna.

3. The radio frequency system of claim 2, wherein the first target matching network comprises a first matching unit and a second matching unit, the second target matching network comprises a third matching unit and a fourth matching unit, the first impedance matching module further comprises:

the first gating unit is respectively connected with the first radio frequency module, the second radio frequency module, the first matching unit, the second matching unit, the third matching unit and the fourth matching unit;

a second gating unit connected to the first matching unit, the second matching unit, the third matching unit, the fourth matching unit, the first antenna, and the second antenna, respectively;

the first gating unit and the second gating unit are used for jointly gating the first matching unit respectively connected to the first radio frequency module and the first antenna and the second matching unit respectively connected between the second radio frequency module and the second antenna when the first antenna is the main set antenna;

the first gating unit and the second gating unit are further configured to gate the third matching unit respectively connected to the first radio frequency module and the second antenna and the fourth matching unit respectively connected to the second radio frequency module and the first antenna when the second antenna is the main set antenna.

4. The radio frequency system according to claim 3, wherein the radio frequency transceiver is further connected to the controlled terminal of the first gating unit and the controlled terminal of the second gating unit, respectively, and configured to configure the master set antenna according to the quality information of the radio frequency signal received by the first antenna and the second antenna, and control the first gating unit and the second gating unit to gate the first target matching network or gate the second target matching network together according to the master set antenna.

5. The radio frequency system according to claim 3, wherein the first gating unit includes:

a first single-pole double-throw switch, a first end of the first single-pole double-throw switch is connected with the first radio frequency module, and two second ends of the first single-pole double-throw switch are respectively connected with the first matching unit and the third matching unit in a one-to-one correspondence manner;

a first end of the second single-pole double-throw switch is connected with the second radio frequency module, and two second ends of the second single-pole double-throw switch are respectively connected with the second matching unit and the fourth matching unit in a one-to-one correspondence manner;

alternatively, the first gating unit includes:

two first ends of the first double-pole four-throw switch are respectively connected with the first radio frequency module and the second radio frequency module in a one-to-one correspondence mode, and four second ends of the first double-pole four-throw switch are respectively connected with the first matching unit, the third matching unit, the second matching unit and the fourth matching unit in a one-to-one correspondence mode.

6. The radio frequency system according to claim 3, wherein the second gating unit includes:

a first end of the third single-pole double-throw switch is connected with the first antenna, and two second ends of the third single-pole double-throw switch are respectively connected with the first matching unit and the fourth matching unit in a one-to-one correspondence manner;

a first end of the fourth single-pole double-throw switch is connected with the second antenna, and two second ends of the fourth single-pole double-throw switch are respectively connected with the second matching unit and the third matching unit in a one-to-one correspondence manner;

or, the second gating unit includes:

two first ends of the second double-pole four-throw switch are respectively connected with the first antenna and the second antenna in a one-to-one correspondence mode, and four second ends of the second double-pole four-throw switch are respectively connected with the first matching unit, the third matching unit, the second matching unit and the fourth matching unit in a one-to-one correspondence mode.

7. The radio frequency system according to any of claims 1 to 6, wherein the number of the first antennas is plural and the number of the first target matching networks is plural, the plural first target matching networks corresponding to the plural first antennas one to one; wherein:

the first impedance matching module is further configured to gate the corresponding first target matching network when one of the plurality of first antennas is a main set antenna.

8. The radio frequency system according to any of claims 1-6, wherein the number of the second antennas is plural and the number of the second target matching networks is plural, the plural second target matching networks corresponding to the plural second antennas one to one; wherein:

the first impedance matching module is further configured to gate the corresponding second target matching network when one of the plurality of second antennas is a main set antenna.

9. The radio frequency system according to any of claims 1-6, further comprising:

the second impedance matching module is arranged between the first antenna and the first impedance matching module and is used for carrying out impedance matching on the radio-frequency signal received by the first antenna; and/or

And the third impedance matching module is arranged between the second antenna and the first impedance matching module and is used for carrying out impedance matching on the radio-frequency signal received by the second antenna.

10. A communication device, comprising:

the radio frequency system of claims 1-9.