WO2020192426A1 - Circuit frontal radiofréquence et terminal mobile - Google Patents

Circuit frontal radiofréquence et terminal mobile Download PDF

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Publication number
WO2020192426A1
WO2020192426A1 PCT/CN2020/078864 CN2020078864W WO2020192426A1 WO 2020192426 A1 WO2020192426 A1 WO 2020192426A1 CN 2020078864 W CN2020078864 W CN 2020078864W WO 2020192426 A1 WO2020192426 A1 WO 2020192426A1
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WO
WIPO (PCT)
Prior art keywords
double
throw switch
radio frequency
antenna
circuit
Prior art date
Application number
PCT/CN2020/078864
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English (en)
Chinese (zh)
Inventor
谢政男
林景球
Original Assignee
维沃移动通信有限公司
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Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2020192426A1 publication Critical patent/WO2020192426A1/fr

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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
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Definitions

  • the embodiments of the present disclosure relate to the technical field of terminal applications, and in particular to a radio frequency front-end circuit and a mobile terminal.
  • the transmission rate from 4G is 100Mbps to 1Gbps, and the peak transmission rate of 5G New Radio (NR) can reach 20Gbps.
  • the increase in rate requires 5G to require 4*4 Multiple Input Multiple Output (MIMO) Key technology.
  • MIMO Multiple Input Multiple Output
  • FIG. 1 it is a schematic diagram of the structure of the radio frequency front-end circuit of 5G mobile terminal equipment.
  • the circuit architecture is used to implement one-transmit and four-receive 1T4R and two-transmit and four-receive 2T4R.
  • the layout and wiring of 5G mobile terminal equipment directly affects Path difference loss
  • the RF front-end circuit structure of related 5G mobile terminal equipment, and its long wiring leads to high path difference loss.
  • the RF front-end circuit structure of related 5G mobile terminal equipment often uses a three-pole three-throw switch.
  • the higher the signal transmission frequency the larger the bandwidth, resulting in greater component loss, and also increasing the output power to achieve the specification. Difficulty. Therefore, how to reduce the path difference loss, the component difference loss, and the complexity of the circuit design becomes an urgent problem to be solved.
  • the embodiments of the present disclosure provide a radio frequency front-end circuit and a mobile terminal to solve the problem of the radio frequency front-end circuit structure of related 5G mobile terminal equipment, which has a long wiring and high path loss.
  • an embodiment of the present disclosure provides a radio frequency front-end circuit, including:
  • the first double pole double throw switch The first double pole double throw switch
  • the first signal receiving circuit is connected to the first target antenna of the first antenna and the second antenna through the first double-pole double-throw switch, and receives signals through the first target antenna;
  • the second double pole double throw switch The second double pole double throw switch
  • the second signal receiving circuit is connected to the second target antenna of the third antenna and the fourth antenna through the second double-pole double-throw switch, and receives signals through the second target antenna;
  • the third double pole double throw switch is connected to the first double pole double throw switch and the second double pole double throw switch respectively;
  • the first radio frequency circuit connected to the third double-pole double-throw switch, includes: a signal receiving mode or a signal transmitting mode;
  • the second radio frequency circuit connected to the third double-pole double-throw switch, includes: a signal receiving mode or a signal transmitting mode.
  • the embodiments of the present disclosure also provide a mobile terminal, including:
  • the controller is used to control the opening and closing of the first double pole double throw switch, the opening and closing of the second double pole double throw switch, and/or the opening and closing of the third double pole double throw switch.
  • the third double-pole double-throw switch is connected to the first double-pole double-throw switch and the second double-pole double-throw switch respectively.
  • the first antenna, the second antenna are connected to the first signal receiving circuit, and the second double-pole double-throw switch is also connected to the third antenna, the fourth antenna, and the second signal receiving circuit respectively, so that they are connected to the third double-pole double-throw switch respectively.
  • the connected first radio frequency circuit and the second radio frequency circuit can flexibly receive signals and/or transmit signals through any antenna.
  • the circuit design is simple, and on the basis of realizing signal transmission and/or reception, the RF layout wiring can be shortened, Thereby reducing the path difference loss.
  • Figure 1 is a schematic diagram of the structure of a radio frequency front-end circuit in the related art.
  • FIG. 2 is a schematic structural diagram of a radio frequency front-end circuit provided by some embodiments of the disclosure.
  • the radio frequency front-end circuit includes: a first double-pole double-throw switch 1; a first signal receiving circuit 2, which is connected to the first target antenna of the first antenna 3 and the second antenna 4 through the first double-pole double-throw switch 1, And receive the signal through the first target antenna; the second double-pole double-throw switch 5; the second signal receiving circuit 6, through the second double-pole double-throw switch 5, and the third antenna 7 and the fourth antenna 8 of the second target
  • the antenna is connected and the signal is received through the second target antenna;
  • the third double-pole double-throw switch 9 is connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5;
  • the first radio frequency circuit 10 is connected to the
  • the three double-pole double-throw switches 9 are connected to include: signal receiving mode or signal transmitting mode; the second radio frequency circuit 11 is connected to the third double-pole double-throw switch 9 to include
  • the first target antenna is the first antenna 3 or the second antenna 4.
  • the second target antenna is the third antenna 7 or the fourth antenna 8.
  • the double-pole double-throw switch itself has small component loss and good isolation.
  • This disclosure uses double-pole double-throw switches, namely the first double-pole double-throw switch 1, the second double-pole double-throw switch 5, and the third double-pole double-throw switch.
  • the double-pole double-throw switch 9 can not only improve the transmitting performance of the RF front-end circuit, but also improve the receiving performance of the RF front-end circuit.
  • the third double-pole double-throw switch 9 is connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5 respectively, wherein the first double-pole double-throw switch 1 is also connected to the first antenna 3,
  • the second antenna 4 is connected to the first signal receiving circuit 2
  • the second double-pole double-throw switch 5 is also connected to the third antenna 7, the fourth antenna 8 and the second signal receiving circuit 6, so that they are connected to the third double-pole double-throw switch respectively.
  • the first radio frequency circuit 10 and the second radio frequency circuit 11 connected by the throw switch 9 can flexibly receive signals and/or transmit signals through any antenna. This circuit is simple in design and can be shortened based on the realization of signal transmission and/or reception. RF layout and routing, thereby reducing path loss.
  • the first double-pole double-throw switch 1 includes: a first movable end, a second movable end, a first fixed end and a second fixed end, wherein the first movable end is connected to the first signal receiving circuit 2, and the first fixed end The first antenna 3 is connected, and the second fixed end is connected to the second antenna 4.
  • the first double-pole double-throw switch 1 is used to connect the first movable end to the first fixed end or the second fixed end, and also to connect the second movable end to the first fixed end or the second fixed end.
  • the second double-pole double-throw switch 5 includes: a third movable end, a fourth movable end, a third fixed end and a fourth fixed end, wherein the third movable end is connected to the second signal receiving circuit 6, and the third fixed end is connected to the There are three antennas 7, and the fourth fixed end is connected to the fourth antenna 8.
  • the second double-pole double-throw switch 5 is used to connect the third movable end to the third fixed end or the fourth fixed end, and is also used to connect the fourth movable end to the third fixed end or the fourth fixed end.
  • the third double-pole double-throw switch 9 includes: a fifth movable end, a sixth movable end, a fifth fixed end, and a sixth fixed end, wherein the fifth movable end is connected to the first radio frequency circuit 10, and the sixth movable end is connected to the second In the radio frequency circuit 11, the fifth fixed end is connected to the second movable end, and the sixth fixed end is connected to the fourth movable end.
  • the third double-pole double-throw switch 9 is used to connect the fifth movable end to the fifth fixed end or the sixth fixed end, and also to connect the sixth movable end to the fifth fixed end or the sixth fixed end.
  • the first radio frequency circuit 10 includes: a first low-noise amplifier 12, a first power amplifier 13, a first switch 14 and a third double-pole double-throw switch 9 respectively.
  • the first filter 15 connected to the first switch 14 and the movable end.
  • the first low-noise amplifier 12 is connected to the first filter 15 through the first switch 14, and the fifth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the first double-pole double-throw switch
  • the second movable end of the throw switch 1 is connected to a certain end of the first fixed end and the second fixed end, the first radio frequency circuit 10 is in a signal receiving mode.
  • the first low-noise amplifier 12 is connected to the first filter 15 through the first switch 14, and the fifth movable end of the third double-pole double-throw switch 9 is connected to its sixth fixed end, and the second double-pole double-throw switch When the fourth movable end of the switch 5 is connected to a certain end of the third fixed end and the fourth fixed end, the first radio frequency circuit 10 is in the signal receiving mode.
  • the first low noise amplifier 12 when the first low noise amplifier 12 is connected to the first filter 15 through the first switch 14, the first low noise amplifier 12 and the first filter 15 form a signal receiving circuit.
  • the fifth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the second movable end of the first double-pole double-throw switch 1 is connected to the first fixed end and the second fixed end.
  • the signal receiving circuit can pass through the first antenna 3 and One of the second antennas 4 receives the signal.
  • the fifth movable end of the third double-pole double-throw switch 9 communicates with its sixth fixed end, and the fourth movable end of the second double-pole double-throw switch 5 communicates with one of its third and fourth fixed ends.
  • the signal receiving circuit can pass through the third antenna 7 and the fourth antenna 8.
  • One of the antennas receives the signal.
  • the signal receiving circuit of the first radio frequency circuit 10 can flexibly receive signals through any antenna through the third double-pole double-throw switch 9 respectively connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5 , Which can shorten the radio frequency layout and reduce the path loss.
  • the first signal receiving circuit is connected to the first antenna 3 through the first double pole double throw switch 1, and the second signal receiving circuit is connected to the third antenna 7 through the second double pole double throw switch 5, then
  • the signal receiving circuit formed by the first low noise amplifier 12 and the first filter 15 can be connected to the second antenna 4 through the third double pole double throw switch 9 and the first double pole double throw switch 1, or the first low noise
  • the signal receiving circuit formed by the amplifier 12 and the first filter 15 can also be connected to the fourth antenna 8 through the third double pole double throw switch 9 and the second double pole double throw switch 5.
  • the first power amplifier 13 is connected to the first filter 15 through the first switch 14, and the fifth movable end of the third double pole double throw switch 9 is connected to its fifth fixed end, and the first double pole double throw
  • the first radio frequency circuit 10 is in a signal transmission mode
  • the first power amplifier 13 is connected to the first filter 15 through the first switch 14, and the fifth movable end of the third double pole double throw switch 9 is connected to its sixth fixed end, and the second double pole double throw switch When the fourth movable end of 5 is connected to a certain end of the third fixed end and the fourth fixed end, the first radio frequency circuit 10 is in a signal transmission mode.
  • the first power amplifier 13 when the first power amplifier 13 is connected to the first filter 15 through the first switch 14, the first power amplifier 13 and the first filter 15 form a signal transmission circuit.
  • the fifth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the second movable end of the first double-pole double-throw switch 1 is connected to the first fixed end and the second fixed end.
  • the signal transmitting circuit can pass through the first antenna 3 and One of the second antennas 4 transmits a signal.
  • the fifth movable end of the third double-pole double-throw switch 9 communicates with its sixth fixed end, and the fourth movable end of the second double-pole double-throw switch 5 communicates with one of its third and fourth fixed ends.
  • the signal transmitting circuit can pass through the third antenna 7 and the fourth antenna 8.
  • One of the antennas emits a signal.
  • the signal transmitting circuit of the first radio frequency circuit 10 can flexibly transmit signals through any antenna through the third double-pole double-throw switch 9 connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5 respectively. , Which can shorten the radio frequency layout and reduce the path loss.
  • the first signal receiving circuit is connected to the first antenna 3 through the first double pole double throw switch 1, and the second signal receiving circuit is connected to the third antenna 7 through the second double pole double throw switch 5, then
  • the first power amplifier 13 and the first filter 15 form a signal transmitting circuit which can be connected to the second antenna 4 through the third double pole double throw switch 9 and the first double pole double throw switch 1, or the first power amplifier 13 and
  • the first filter 15 forms a signal transmitting circuit and can also be connected to the fourth antenna 8 through the third double pole double throw switch 9 and the second double pole double throw switch 5.
  • the first switch 14 is a single-pole double-throw switch, which includes a movable terminal and two fixed terminals. Among them, the movable end is connected to the first filter 15, a certain end is connected to the input end of the first low noise amplifier 12, and the other fixed end is connected to the output end of the first power amplifier 13.
  • the second radio frequency circuit 11 includes: a second low-noise amplifier 16, a second power amplifier 17, a second switch 18, and a third double-pole double-throw switch 9 respectively.
  • the second filter 19 is connected to the six movable ends and the second switch 18.
  • the second low noise amplifier 16 is connected to the second filter 19 through the second switch 18, and the sixth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the first double-pole double-throw switch
  • the second movable end of the throw switch 1 is connected to a certain end of the first fixed end and the second fixed end, the second radio frequency circuit 11 is in a signal receiving mode.
  • the second low noise amplifier 16 is connected to the second filter 19 through the second switch 18, and the sixth movable end of the third double pole double throw switch 9 is connected to its sixth fixed end, and the second double pole double throw
  • the fourth movable end of the switch 5 is connected to a certain end of the third fixed end and the fourth fixed end, the second radio frequency circuit 11 is in the signal receiving mode.
  • the second low noise amplifier 16 when the second low noise amplifier 16 is connected to the second filter 19 through the second switch 18, the second low noise amplifier 16 and the second filter 19 form a signal receiving circuit.
  • the sixth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the second movable end of the first double-pole double-throw switch 1 is connected to its first fixed end and the second fixed end.
  • the signal receiving circuit can pass through the first antenna One of the antennas 3 and 4 receives the signal.
  • the sixth movable end of the third double-pole double-throw switch 9 is connected with its sixth fixed end, and the fourth movable end of the second double-pole double-throw switch 5 is connected to a certain end of the third fixed end and the fourth fixed end.
  • the signal receiving circuit can pass through the third antenna 7 and the fourth antenna One of the antennas in 8 receives the signal.
  • the signal receiving circuit of the second radio frequency circuit 11 can flexibly receive signals through any antenna through the third double-pole double-throw switch 9 respectively connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5 , Which can shorten the radio frequency layout and reduce the path loss.
  • the first signal receiving circuit is connected to the first antenna 3 through the first double pole double throw switch 1
  • the second signal receiving circuit is connected to the third antenna 7 through the second double pole double throw switch 5, and the first The radio frequency circuit 10 is connected to the second antenna 4, and the signal receiving circuit is formed by the second low noise amplifier 16 and the second filter 19 through the third double pole double throw switch 9 and the second double pole double throw switch 5 and the fourth The antenna 8 is connected.
  • a radio frequency circuit 10 is connected to the fourth antenna 8 through the third double-pole double-throw switch 9 and the second double-pole double-throw switch 5.
  • the second low-noise amplifier 16 and the second filter 19 form a signal receiving circuit through the third
  • the double-pole double-throw switch 9 and the first double-pole double-throw switch 1 are connected to the second antenna 4.
  • the second power amplifier 17 is connected to the second filter 19 through the second switch 18, and the sixth movable end of the third double pole double throw switch 9 is connected to its fifth fixed end, and the first double pole double throw
  • the second movable end of the switch 1 is in communication with a certain end of the first fixed end and the second fixed end, the second radio frequency circuit 11 is in a signal transmission mode.
  • the second power amplifier 17 is connected to the second filter 19 through the second switch 18, and the sixth movable end of the third double-pole double-throw switch 9 is connected to its sixth fixed end, and the second double-pole double-throw switch When the fourth movable end of 5 is connected to a certain end of the third fixed end and the fourth fixed end, the second radio frequency circuit 11 is in the signal transmission mode.
  • the second power amplifier 17 when the second power amplifier 17 is connected to the second filter 19 through the second switch 18, the second power amplifier 17 and the second filter 19 form a signal transmission circuit.
  • the sixth movable end of the third double-pole double-throw switch 9 is connected to its fifth fixed end, and the second movable end of the first double-pole double-throw switch 1 is connected to the first fixed end and the second fixed end.
  • the signal transmitting circuit can pass through the first antenna 3 and One of the second antennas 4 transmits a signal.
  • the sixth movable end of the third double-pole double-throw switch 9 is connected with its sixth fixed end, and the fourth movable end of the second double-pole double-throw switch 5 is connected to a certain end of the third fixed end and the fourth fixed end.
  • the signal transmitting circuit can pass through the third antenna 7 and the fourth antenna One of the antennas in 8 transmits a signal.
  • the signal transmitting circuit of the second radio frequency circuit 11 can flexibly transmit signals through any antenna through the third double-pole double-throw switch 9 respectively connected to the first double-pole double-throw switch 1 and the second double-pole double-throw switch 5 , Which can shorten the radio frequency layout and reduce the path loss.
  • the first signal receiving circuit is connected to the first antenna 3 through the first double pole double throw switch 1
  • the second signal receiving circuit is connected to the third antenna 7 through the second double pole double throw switch 5, and the first
  • the radio frequency circuit 10 is connected to the second antenna 4, and then the second power amplifier 17 and the second filter 19 form a signal transmission circuit through the third double pole double throw switch 9 and the second double pole double throw switch 5 and the fourth antenna 8Connect.
  • a radio frequency circuit 10 is connected to the fourth antenna 8 through the third double-pole double-throw switch 9 and the second double-pole double-throw switch 5.
  • the second power amplifier 17 and the second filter 19 form a signal transmitting circuit through the third double-pole double-throw switch.
  • the pole double throw switch 9 and the first double pole double throw switch 1 are connected to the second antenna 4.
  • the second switch 18 is a single-pole double-throw switch, which includes a movable end and two fixed ends. Among them, the movable end is connected to the second filter 19, a certain end is connected to the input end of the second low-noise amplifier 16, and the other fixed end is connected to the output end of the second power amplifier 17.
  • the first signal receiving circuit 2 includes: a third low noise amplifier 20 and a third filter 21.
  • the third filter 21 is respectively connected to the input terminal of the third low noise amplifier 20 and the first movable end of the first double pole double throw switch 1; wherein, the first movable end of the first double pole double throw switch 1 When connected to one of the first fixed terminal and the second fixed terminal, the first signal receiving circuit 2 is turned on.
  • first signal receiving circuit 2 can receive signals through one of the first antenna 3 and the second antenna 4.
  • the double-pole double-throw switch itself has small component loss and good isolation, it can not only improve the receiving performance of the first signal receiving circuit 2, but also can pass through the third double-pole double-throw switch connected to the first double-pole double-throw switch 1.
  • the throw switch 9 improves the receiving performance or the transmitting performance of the first radio frequency circuit 10 or the second radio frequency circuit 11.
  • the second signal receiving circuit 6 includes: a fourth low noise amplifier 22 and a fourth filter 23.
  • the fourth filter 23 is respectively connected to the input end of the fourth low noise amplifier 22 and the third movable end of the second double pole double throw switch 5; wherein, the third movable end of the second double pole double throw switch 5 When connected to one of the third fixed terminal and the fourth fixed terminal, the second signal receiving circuit 6 is turned on.
  • the third movable end of the second double-pole double-throw switch 5 is connected to a certain end of the third fixed end and the fourth fixed end, because the third fixed end of the second double-pole double-throw switch 5 It is connected to the third antenna 7 and the fourth fixed terminal is connected to the fourth antenna 8, so the second signal receiving circuit 6 can receive signals through one of the third antenna 7 and the fourth antenna 8.
  • the double-pole double-throw switch has small component loss and good isolation, it can not only improve the receiving performance of the second signal receiving circuit 6, but also can pass through the third double-pole double-throw switch connected to the second double-pole double-throw switch 5.
  • the throw switch 9 improves the receiving performance or the transmitting performance of the first radio frequency circuit 10 or the second radio frequency circuit 11.
  • the radio frequency front-end circuit of some embodiments of the present disclosure further includes: a radio frequency transceiver (not shown in the figure), the radio frequency transceiver is respectively connected to the first signal receiving circuit 2, the second signal receiving circuit 6, and the first radio frequency The circuit 10 is connected to the second radio frequency circuit 11.
  • the radio frequency transceiver may include: a first signal receiving port, a second signal receiving port, a third signal receiving port, a fourth signal receiving port, a first signal transmitting port, and a second signal transmitting port.
  • the first signal receiving port is connected to the output terminal of the third low noise amplifier 20 in the first signal receiving circuit 2; the second signal receiving port is connected to the output terminal of the first low noise amplifier 12 in the first radio frequency circuit 10
  • the third signal receiving port is connected to the output end of the second low noise amplifier 16 in the second radio frequency circuit 11; the fourth signal receiving port is connected to the output end of the fourth low noise amplifier 22 in the second signal receiving circuit 6.
  • the first signal transmission port is connected to the input end of the first power amplifier 13 in the first radio frequency circuit 10; the second signal transmission port is connected to the input end of the second power amplifier 17 in the second radio frequency circuit 11.
  • the above-mentioned RF front-end circuit shown in Figure 2 can realize the 1T4R/2T4R function of the 5G NR system, ensuring the functions of 1 transmission and 4 reception; or, 2 transmission and 4 reception functions.
  • the first transmission signal can be amplified by the first power amplifier 13 after being sent by the radio frequency transceiver (not shown in the figure), after passing through the first switch 14, after being filtered by the first filter 15 , And after the third double-pole double-throw switch 9:
  • the signal After switching to the first double-pole double-throw switch 1, the signal is transmitted from the first antenna 3 or the second antenna 4;
  • the signal can be amplified by the second power amplifier 17, after passing through the second switch 18, and filtered by the second filter 19 , And after the third double-pole double-throw switch 9:
  • the signal After switching to the first double-pole double-throw switch 1, the signal is transmitted from the first antenna 3 or the second antenna 4;
  • the first transmission signal is transmitted through the third double pole double throw switch 9 and the first double pole double throw switch 1 through one of the first antenna 3 and the second antenna 4, the second The channel transmission signal is transmitted through the third antenna 7 or the fourth antenna 8 through the third double-pole double-throw switch 9 and the second double-pole double-throw switch 5.
  • the first received signal can be received through the first antenna 3, filtered by the first double-pole double-throw switch 1, and then filtered by the third filter 21, and then enters the third low-noise amplifier 20. Amplify the signal and transmit it to the radio frequency transceiver for subsequent processing.
  • the second received signal After the second received signal can be received through the second antenna 4, it is switched from the first double-pole double-throw switch 1 to the third double-pole double-throw switch 9, and then filtered through the first filter 15 path, and then passed through the first
  • the switch 14 is switched to the first low noise amplifier 12 to amplify the signal and transmit it to the radio frequency transceiver for subsequent processing.
  • the above-mentioned signal transmission path of the first received signal and the signal transmission path of the second received signal are only an example. That is to say, after the received signal passes through the first antenna 3 or the second antenna 4, it can be switched to the receiving path including the third low-noise amplifier according to the actual situation through the first double-pole double-throw switch 1; or,
  • the third double-pole double-throw switch 9 it is selected to switch to the receiving path including the first low noise amplifier or to the receiving path including the second low noise amplifier, which is not specifically limited here.
  • the third received signal can be received by the third antenna 7, after being filtered by the second double-pole double-throw switch 5, and then filtered by the fourth filter 23, it enters the fourth low-noise amplifier 22, and the signal is amplified and transmitted to the radio frequency transceiver Perform follow-up processing.
  • the fourth received signal can be received by the fourth antenna 8, after being switched from the second double-pole double-throw switch 5 to the third double-pole double-throw switch 9, and then filtered through the second filter 19 path, and then passed through the second
  • the switch 18 is switched to the second low-noise amplifier 16 to amplify the signal and transmit it to the radio frequency transceiver for subsequent processing.
  • the signal transmission path of the third received signal and the signal transmission path of the fourth received signal are only an example, that is, the received signal is received by the third antenna 7 or the fourth antenna 8, and then passes through the first antenna.
  • a double-pole double-throw switch 1 can choose to switch to the receiving path including the fourth low-noise amplifier according to the actual situation; or,
  • the third double-pole double-throw switch 9 it is selected to switch to the receiving path including the first low noise amplifier or to the receiving path including the second low noise amplifier, which is not specifically limited here.
  • the radio frequency front-end circuit of some embodiments of the present disclosure uses a third double-pole double-throw switch connected to the first double-pole double-throw switch and the second double-pole double-throw switch respectively, wherein the first double-pole double-throw switch is also connected to the The first antenna, the second antenna are connected to the first signal receiving circuit, and the second double-pole double-throw switch is also connected to the third antenna, the fourth antenna, and the second signal receiving circuit respectively, so that they are connected to the third double-pole double-throw switch respectively.
  • the connected first radio frequency circuit and the second radio frequency circuit can flexibly receive signals and/or transmit signals through any antenna.
  • the circuit design is simple, and on the basis of realizing signal transmission and/or reception, the RF layout wiring can be shortened, Thereby reducing the path difference loss.
  • the radio frequency front-end circuit of the present disclosure can also be integrated into an integrated circuit chip.
  • Some embodiments of the present disclosure also provide a mobile terminal, including: a controller; and the radio frequency front-end circuit as described in the above embodiments; wherein the controller is used to control the opening and closing of the first double-pole double-throw switch, and the second The opening and closing of the double pole double throw switch and/or the opening and closing of the third double pole double throw switch.
  • controller is also used to control the closing of the first switch and/or the opening and closing of the second switch.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

L'invention concerne un circuit frontal radiofréquence et un terminal mobile. Le circuit comprend : un premier commutateur bipolaire bidirectionnel ; un premier circuit de réception de signal, connecté à l'une d'une première antenne et d'une seconde antenne au moyen du premier commutateur bipolaire bidirectionnel et recevant un signal au moyen de l'antenne connectée ; un deuxième commutateur bipolaire bidirectionnel ; un deuxième circuit de réception de signal, connecté à l'une d'une troisième antenne et d'une quatrième antenne au moyen du deuxième commutateur bipolaire bidirectionnel et recevant un signal au moyen de l'antenne connectée ; un troisième commutateur bipolaire bidirectionnel, respectivement connecté au premier commutateur bipolaire bidirectionnel et au deuxième commutateur bipolaire bidirectionnel ; un premier circuit radiofréquence, connecté au troisième commutateur bipolaire bidirectionnel et comprenant un mode de réception de signal ou un mode d'émission de signal ; et un deuxième circuit radiofréquence, connecté au troisième commutateur bipolaire bidirectionnel et comprenant un mode de réception de signal ou un mode d'émission de signal.
PCT/CN2020/078864 2019-03-22 2020-03-11 Circuit frontal radiofréquence et terminal mobile WO2020192426A1 (fr)

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CN110518932B (zh) * 2019-08-16 2022-06-07 维沃移动通信有限公司 一种射频前端电路及移动终端
CN110808757A (zh) * 2019-10-29 2020-02-18 Tcl移动通信科技（宁波）有限公司 射频前端电路及终端设备
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CN110890900A (zh) * 2019-11-29 2020-03-17 维沃移动通信有限公司 射频电路及电子设备
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CN111294081B (zh) * 2020-01-22 2022-01-11 Oppo广东移动通信有限公司 射频系统和电子设备
CN111510180B (zh) * 2020-04-23 2022-02-01 维沃移动通信有限公司 天线模组、电子设备及控制方法
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