CN111404575A - Configurable multi-mode radio frequency front end - Google Patents
Configurable multi-mode radio frequency front end Download PDFInfo
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- CN111404575A CN111404575A CN202010317836.XA CN202010317836A CN111404575A CN 111404575 A CN111404575 A CN 111404575A CN 202010317836 A CN202010317836 A CN 202010317836A CN 111404575 A CN111404575 A CN 111404575A
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- 239000003990 capacitor Substances 0.000 claims description 14
- 230000008878 coupling Effects 0.000 description 11
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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Abstract
The invention discloses a configurable multi-mode radio frequency front end, which comprises: the first resonant cavity, the second resonant cavity, the first change-over switch and the second change-over switch; the low-frequency band signal transmits a signal to an antenna port through the first resonant cavity; and the high-frequency band signal sequentially passes through the second change-over switch, the second resonant cavity and the first change-over switch to send a signal to an antenna port. The configurable multi-mode radio frequency front end provided by the invention not only can save a large amount of radio frequency front end area, but also greatly reduces the complexity of the radio frequency front end, thereby reducing the cost.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a configurable multi-mode radio frequency front end.
Background
The existing wireless communication is a state of multi-system and multi-band coexistence, and becomes more and more complex for a wireless radio frequency transceiving front end, and the radio frequency front end generally needs to complete different functions of frequency selection, two-way, isolation, even duplex, coupling, duplex and the like; meanwhile, as wireless communication is developed from 4G to 5G, the cost, the area and the size of the radio frequency front end occupied in a mobile phone or a terminal product are larger and larger, the complexity, the cost and the area of the radio frequency front end can be greatly reduced by the configurable radio frequency front end, and the wireless communication system has a wide prospect.
Therefore, it is an urgent problem to provide a duplexer that can save a large amount of rf front end area and thus reduce a large amount of cost.
Disclosure of Invention
In view of this, the present invention provides a configurable multi-mode rf front-end, which not only can save a large amount of rf front-end area, but also greatly reduces the complexity of the rf front-end, thereby reducing the cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
a configurable multi-mode radio frequency front end, comprising: the first resonant cavity, the second resonant cavity, the first change-over switch and the second change-over switch; the low-frequency band signal transmits a signal to an antenna port through the first resonant cavity; and the high-frequency band signal sequentially passes through the second change-over switch, the second resonant cavity and the first change-over switch to send a signal to an antenna port.
Preferably, in the configurable multi-mode rf front end, the first resonant cavity and the second resonant cavity are both formed by connecting an inductor and an adjustable capacitor in parallel.
Preferably, in the configurable multi-mode radio frequency front end, one end of the first resonant cavity is connected to a low-frequency band signal, and the other end of the first resonant cavity is connected to the moving end of the first switch; and two fixed ends of the first change-over switch are respectively connected with two ends of the second resonant cavity.
Preferably, in the configurable multi-mode radio frequency front end, a high-frequency band signal is connected to a moving end of the second switch, and two fixed ends of the second switch are respectively connected to two ends of the second resonant cavity.
Preferably, in the configurable multi-mode rf front-end, further comprising: an adjustable resistor; one end of the adjustable resistor is connected with one end of the second resonant cavity, and the other end of the adjustable resistor is grounded.
According to the technical scheme, compared with the prior art, the configurable multi-mode radio frequency front end is provided, and firstly, the positive and negative changes of the mutual inductance coupling coefficient caused by the fact that magnetic field distribution is enhanced or weakened in a mode of switching the mutual inductance coupling coefficient, so that the frequency selectivity is changed; secondly, the first change-over switch and the second change-over switch are realized by adopting the existing CMOS process or SOI process, so that the radio frequency performance is not reduced, the realization is very flexible, and the very good switching characteristic is provided for the configurable radio frequency front end; the invention realizes the following by a very simple structure through mutual inductance coupling and a change-over switch: the duplexer, the dual-frequency switch and the loopback have the characteristics that a large amount of radio frequency front end area can be saved, so that a large amount of cost is reduced; and secondly, the system can be configured through numerical control, thereby realizing very low configuration cost and being very flexible to use.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Figure 1 is a schematic circuit diagram of a diplexer of the present invention;
FIG. 2 is a graph of the duplexer mode frequency response of the present invention;
FIG. 3 is a circuit diagram of a dual frequency switch mode of the present invention;
FIG. 4 is a graph of the dual frequency switch mode frequency response of the present invention;
FIG. 5 is a circuit diagram of the loopback mode of the present invention;
FIG. 6 is a loop-back mode frequency response curve of the present invention;
FIG. 7 is a schematic diagram of a dual-frequency switched-mode magnetic field distribution of the present invention;
fig. 8 is a diagram illustrating the distribution of the magnetic field in the duplexer mode according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A configurable multi-mode radio frequency front end, comprising: a first resonant cavity 1, a second resonant cavity 2, a first switch S1And a second change-over switch S2(ii) a The low-frequency signal passes through the first resonant cavity 1 to the antenna port P2Sending a signal; high frequency terminal P3The signal passes through the second switch S in turn2A second resonant cavity 2, a first switch S1Towards antenna port P2And sending the signal.
In order to further optimize the above technical solution, the first resonant cavity 1 and the second resonant cavity 2 are both formed by connecting an inductor and a capacitor in parallel.
Further, the first inductor L1And a first capacitor C1Form a first resonant cavity 1 and a second inductor L2And a second capacitor C2Forming a second resonant cavity 2, a first capacitor C1And a second capacitor C2Is two adjustable capacitors, so that the frequency of two resonant cavities can be changed, and the two resonant cavities have mutual inductance with the coefficient of k.
In order to further optimize the above technical solution, one end of the first resonant cavity 1 is connected to a low frequency band signal, and the other end is connected to the first switch S1The movable end of the connecting rod is connected; first change-over switch S1Are respectively connected to two ends of the second resonant cavity 2.
In order to further optimize the technical scheme, the high-frequency end P3Signal and second changeover switch S2A second change-over switch S2Are connected to the two ends of the second cavity 2, respectively.
Further, a first switch S1The sign of the coupling coefficient k is changed, i.e. the coupling coefficient k may be positive or negative, so that the mode of the switch is also changed.
In order to further optimize the above technical solution, the method further comprises: adjustable resistor R1(ii) a Adjustable resistor R1One end of the second resonant cavity 2 is connected with one end of the first resonant cavity, and the other end of the second resonant cavity is grounded.
Further, an adjustable resistor R1In the loop-back mode, the low-frequency end P is controlled1And a high frequency terminal P3The coupling between them is generally undesirable because the transmitted signal is too strong and may cause saturation, which is equivalent to an attenuation.
The working principle is as follows:
(1) duplexer mode
As shown in fig. 1 and 2, in the duplexer mode, the first inductor L1And a first capacitor C1Second inductor L2And a second capacitor C2Respectively resonates at frequency point f1And f2Upper, first change-over switch S1Now striking below, the first inductor L1And a second inductor L2The coupling mode of (1) is positive coupling, that is, the coupling coefficient k is a positive number, when the frequency response characteristic curve is as shown in FIG. 2, S21 and S31 are respectively the low frequency end P1High frequency terminal P3Towards antenna port P2And (4) outputting a curve, wherein the working state of the mode can be used for realizing double sending, double receiving and one sending and one receiving.
(2) Dual frequency switching mode
As shown in fig. 3 and 4, in the duplexer mode, the first switch S1When the voltage is applied to the upper circuit, the coupling coefficient k is a negative value, the duplexer mode is changed into a dual-frequency switch mode, and the first capacitor C is switched1And a second capacitor C2To achieve the operating frequency of the dual frequency switch. The frequency characteristic is shown in FIG. 4, in which the solid line is f1Frequency characteristic of (1), dotted line is f2The frequency characteristic of (1).
(3) Loopback mode
As shown in fig. 5 and 6, in the loop-back mode, the first switch S1Make an upper circuit with a second change-over switch S2Directly connected, second change-over switch S2At the left path, adjustable resistor R1For relatively low resistance, the gain of S13 is adjusted by adjusting the first capacitor C1And a second capacitor C2The frequency characteristics from the low frequency end P1 to the high frequency end P3 can be adjusted as shown in the right diagram of fig. 6.
Fig. 7 shows the field partial cancellation, i.e. the dual-band switching mode, and fig. 8 shows the mutually enhanced mode, i.e. the duplexer mode.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A configurable multi-mode radio frequency front end, comprising: the first resonant cavity, the second resonant cavity, the first change-over switch and the second change-over switch; the low-frequency band signal transmits a signal to an antenna port through the first resonant cavity; and the high-frequency band signal sequentially passes through the second change-over switch, the second resonant cavity and the first change-over switch to send a signal to an antenna port.
2. The configurable multi-mode rf front-end of claim 1, wherein the first resonator and the second resonator are formed by connecting an inductor and an adjustable capacitor in parallel.
3. A configurable multi-mode rf front-end as claimed in claim 1, wherein one end of said first resonant cavity is connected to low band signals, and the other end is connected to the moving end of said first switch; and two fixed ends of the first change-over switch are respectively connected with two ends of the second resonant cavity.
4. A configurable multi-mode rf front-end as claimed in claim 3, wherein a high band signal is connected to the moving terminal of the second switch, and two fixed terminals of the second switch are connected to two terminals of the second resonant cavity respectively.
5. A configurable multi-mode radio frequency front end as claimed in any one of claims 1 to 4, further comprising: an adjustable resistor; one end of the adjustable resistor is connected with one end of the second resonant cavity, and the other end of the adjustable resistor is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010317836.XA CN111404575A (en) | 2020-04-21 | 2020-04-21 | Configurable multi-mode radio frequency front end |
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| CN202010317836.XA CN111404575A (en) | 2020-04-21 | 2020-04-21 | Configurable multi-mode radio frequency front end |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249867A (en) * | 1997-01-13 | 2000-04-05 | 艾利森电话股份有限公司 | Signal combining device and method for radio communication |
| CN101902243A (en) * | 2010-07-28 | 2010-12-01 | 锐迪科创微电子（北京）有限公司 | Configurable multimode radio-frequency front end module and mobile terminal having same |
| WO2013020442A1 (en) * | 2011-08-09 | 2013-02-14 | 惠州Tcl移动通信有限公司 | Mobile terminal and gps and 3g single-antenna realizing device |
| EP2814112A1 (en) * | 2013-06-13 | 2014-12-17 | Alcatel Lucent | Resonant assembly |
| CN110800211A (en) * | 2017-06-28 | 2020-02-14 | 株式会社村田制作所 | High-frequency filter, multiplexer, high-frequency front-end circuit, and communication device |
| CN211959201U (en) * | 2020-04-21 | 2020-11-17 | 珠海复旦创新研究院 | Configurable multi-mode radio frequency front end |
-
2020
- 2020-04-21 CN CN202010317836.XA patent/CN111404575A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249867A (en) * | 1997-01-13 | 2000-04-05 | 艾利森电话股份有限公司 | Signal combining device and method for radio communication |
| CN101902243A (en) * | 2010-07-28 | 2010-12-01 | 锐迪科创微电子（北京）有限公司 | Configurable multimode radio-frequency front end module and mobile terminal having same |
| WO2013020442A1 (en) * | 2011-08-09 | 2013-02-14 | 惠州Tcl移动通信有限公司 | Mobile terminal and gps and 3g single-antenna realizing device |
| EP2814112A1 (en) * | 2013-06-13 | 2014-12-17 | Alcatel Lucent | Resonant assembly |
| CN110800211A (en) * | 2017-06-28 | 2020-02-14 | 株式会社村田制作所 | High-frequency filter, multiplexer, high-frequency front-end circuit, and communication device |
| CN211959201U (en) * | 2020-04-21 | 2020-11-17 | 珠海复旦创新研究院 | Configurable multi-mode radio frequency front end |
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