CN111404570B - Radio frequency circuit and terminal equipment - Google Patents
Radio frequency circuit and terminal equipment Download PDFInfo
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- CN111404570B CN111404570B CN202010195572.5A CN202010195572A CN111404570B CN 111404570 B CN111404570 B CN 111404570B CN 202010195572 A CN202010195572 A CN 202010195572A CN 111404570 B CN111404570 B CN 111404570B
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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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- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
Abstract
The embodiment of the invention discloses a radio frequency circuit and terminal equipment. The radio frequency circuit includes: the radio frequency control module is used for controlling the first radio frequency transceiver module to transmit and receive radio frequency signals of a first frequency band through the first frequency division module, the first switch and the corresponding antenna, and controlling the first radio frequency transceiver module and the second radio frequency transceiver module to respectively receive the radio frequency signals of the first frequency band and transmit and receive the radio frequency signals of a second frequency band through the second frequency division module and the corresponding antenna. The technical scheme of the embodiment of the invention simplifies the structure of the radio frequency circuit, reduces the layout area of radio frequency devices, reduces the design cost of the radio frequency circuit, improves the radio frequency performance and the practicability of the radio frequency circuit, and is favorable for commercialization of communication products.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a radio frequency circuit and terminal equipment.
Background
With the increasing demand for mobile data, the fifth generation mobile communication technology 5G has become a hot spot discussed in the communication industry. At present, relevant requirements and standards of various large operators for 5G communication are not clear, radio frequency schemes and antenna designs are complex, and radio frequency devices, switches and antennas in radio frequency circuits are too many, so that the overall design cost is high, the radio frequency performance is influenced, and the popularization of the 5G communication is not facilitated.
Disclosure of Invention
The invention provides a radio frequency circuit and terminal equipment, which are used for simplifying the structure of the radio frequency circuit, reducing the layout area of radio frequency devices, reducing the design cost of the radio frequency circuit, improving the radio frequency performance and the practicability of the radio frequency circuit and promoting the commercialization of 5G communication products.
In a first aspect, an embodiment of the present invention provides a radio frequency circuit, where the radio frequency circuit includes:
the system comprises a radio frequency control module, a first radio frequency transceiving module, a second radio frequency transceiving module, a first frequency division module, a second frequency division module, a first switch and a plurality of antennas;
the first radio frequency transceiver module is connected to a first end of the first switch through the first frequency dividing module, at least two antennas are respectively connected to different second ends of the first switch, the first radio frequency transceiver module and the second radio frequency transceiver module are connected to the at least two antennas through the second frequency dividing module, and the antennas connected to the first switch and the second frequency dividing module are different;
the radio frequency control module is used for controlling the first radio frequency transceiver module to receive and transmit radio frequency signals of a first frequency band through the first frequency division module, the first switch and the corresponding antenna, and controlling the first radio frequency transceiver module and the second radio frequency transceiver module to receive radio frequency signals of the first frequency band and receive and transmit radio frequency signals of a second frequency band through the second frequency division module and the corresponding antenna.
Optionally, the first frequency band includes a 5G frequency band, and the second frequency band includes an LTE frequency band.
Optionally, the first radio frequency transceiver module includes:
the system comprises a plurality of first radio frequency transceivers of different first frequency bands, and a first diversity receiver and a plurality of sub diversity receivers which are arranged corresponding to each first radio frequency transceiver, wherein the sub diversity receivers comprise a first sub diversity receiver and a second sub diversity receiver;
the radio frequency control module comprises a plurality of radio frequency signal ends, first ends of the first radio frequency transceiver, the first diversity receiver, the first sub diversity receiver and the second sub diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, second ends of the first radio frequency transceiver and the first diversity receiver are respectively connected to the first frequency division module, and second ends of the first sub diversity receiver and the second sub diversity receiver are connected to the second frequency division module.
Optionally, the first frequency-dividing module includes a first combiner and a second combiner, the second ends of the multiple first rf transceivers are respectively connected to different first ends of the first combiner, the second ends of different first diversity receivers are connected to different first ends of the second combiner, and the second ends of the first combiner and the second combiner are respectively connected to the first end of the first switch.
Optionally, the first frequency-dividing module includes a first combiner and a second combiner, and each of the first combiner and the second combiner includes three first ends and one second end;
the radio frequency circuit further includes:
the second ends of the second switch and the second ends of the two first radio frequency transceivers are respectively connected to different first ends of the first combiner, the second ends of the rest first radio frequency transceivers are respectively connected to different first ends of the second switch, the second ends of the third switch and the second ends of the two first diversity receivers are respectively connected to different first ends of the second combiner, the second ends of the rest first diversity receivers are respectively connected to different first ends of the third switch, and the second ends of the first combiner and the second combiner are respectively connected to first ends of the first switch.
Optionally, the first switch includes a plurality of first terminals and a plurality of second terminals, and the second terminals of the first and second combiners are respectively connected to different first terminals of the first switch.
Optionally, the second radio frequency transceiver module includes a second radio frequency transceiver and a second diversity receiver in a second frequency band;
the first ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, and the second ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to the second frequency dividing module.
Optionally, the second frequency-dividing module includes a third combiner and a fourth combiner, the second rf transceiver and the second ends of the different first sub-diversity receivers are respectively connected to different first ends of the third combiner, the second diversity receiver and the second ends of the different second sub-diversity receivers are respectively connected to different first ends of the fourth combiner, and the second ends of the third combiner and the fourth combiner are respectively connected to different antennas.
Optionally, the second frequency-dividing module includes a third combiner and a fourth combiner, and each of the third combiner and the fourth combiner includes three first terminals and one second terminal;
the radio frequency circuit further comprises a fourth switch and a fifth switch, the fourth switch and the fifth switch each comprise a plurality of first terminals and a second terminal, the second terminal of the fourth switch, the second terminal of the second radio frequency transceiver, and the second terminal of one of the first sub-diversity receivers are respectively connected to different first terminals of the third combiner, the second terminals of the other first sub-diversity receivers are respectively connected to different first terminals of the fourth switch, the second terminal of the fifth switch, the second terminal of the second diversity receiver, and the second terminal of one of the second sub-diversity receivers are respectively connected to different first terminals of the fourth combiner, the second terminals of the other second sub-diversity receivers are respectively connected to different first terminals of the fifth switch, and the second terminals of the third combiner and the fourth combiner are respectively connected to different antennas.
Optionally, the radio frequency control module includes a radio frequency chip and a baseband chip, and the radio frequency chip is electrically connected to the baseband chip;
the radio frequency chip is electrically connected with the first radio frequency transceiver module, the second radio frequency transceiver module, the first frequency division module, the second frequency division module and the first switch respectively; or the radio frequency chip is electrically connected with the first radio frequency transceiver module and the second radio frequency transceiver module respectively, and the baseband chip is electrically connected with the first frequency division module, the second frequency division module and the first switch respectively.
In a second aspect, an embodiment of the present invention further provides a terminal device, including the radio frequency circuit according to the first aspect.
The radio frequency circuit provided by the embodiment of the invention comprises a radio frequency control module, a first radio frequency transceiving module, a second radio frequency transceiving module, a first frequency dividing module, a second frequency dividing module, a first switch and a plurality of antennas, wherein in a non-independent working mode, the radio frequency control module controls the first radio frequency transceiving module to realize the SRS radio frequency signal transmission of a first frequency band 1T2R by using the first frequency dividing module, the first switch and at least two antennas, and controls the second radio frequency transceiving module to realize the transceiving of a second frequency band radio frequency signal and the receiving of a part of the first frequency band radio frequency signal by using the second frequency dividing module and at least two antennas. In the independent working mode, the radio frequency control module can also control the second radio frequency transceiver module to be reused for the transceiving of the radio frequency signal of the first frequency band. The technical scheme of the embodiment of the invention solves the technical problems that the existing radio frequency circuit is complex in design, too many radio frequency devices, switches and antennas are arranged in the radio frequency circuit, the circuit design cost is increased, the radio frequency performance of the circuit is influenced, and the popularization of 5G communication is not facilitated. Meanwhile, the number of radio frequency devices in the radio frequency circuit is reduced, the scheme can realize communication of two frequency bands through four antennas, the structure of the radio frequency circuit is simplified, the layout area of the radio frequency devices is reduced, the design cost of the radio frequency circuit is reduced, the radio frequency performance and the practicability of the radio frequency circuit are improved, and the commercialization of communication products is facilitated.
Drawings
Fig. 1 is a schematic block diagram of a radio frequency circuit according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of another rf circuit according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of another rf circuit according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of another rf circuit according to an embodiment of the present invention;
fig. 5 is a schematic block diagram of another rf circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic block diagram of a radio frequency circuit according to an embodiment of the present invention. As shown in fig. 1, the radio frequency circuit includes: the radio frequency control module 1, the first radio frequency transceiver module 2, the second radio frequency transceiver module 3, the first frequency division module 4, the second frequency division module 5, the first switch 6 and the plurality of antennas 7.
The first radio frequency transceiver module 2 is connected to a first end a of a first switch 6 through a first frequency dividing module 4, at least two antennas 7 are respectively connected to different second ends b of the first switch 6, the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 are connected to the at least two antennas 7 through a second frequency dividing module 5, and the antennas 7 connected to the first switch 6 are different from the antennas 7 connected to the second frequency dividing module 5.
The radio frequency control module 1 is configured to control the first radio frequency transceiver module 2 to perform transceiving of radio frequency signals in a first frequency band through the first frequency division module 4, the first switch 6, and the corresponding antenna 7, and control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to perform receiving of radio frequency signals in the first frequency band and transceiving of radio frequency signals in a second frequency band through the second frequency division module 5 and the corresponding antenna 7, respectively.
Specifically, the first radio frequency transceiver module 2 may be configured to receive or transmit a radio frequency signal in a first frequency band, and the second radio frequency transceiver module 3 may be configured to receive or transmit a radio frequency signal in a second frequency band, where the radio frequency signal in the first frequency band overlaps with at least a part of the radio frequency signal in the second frequency band. For example, the first frequency band radio frequency signal may be a radio frequency signal of a 5G frequency band, the second frequency band radio frequency signal may be a radio frequency signal based on a 4G Long Term Evolution (LTE) frequency band, and since the LTE frequency band is overlapped with a partial frequency band of the 5G frequency band, the second radio frequency transceiver module 3 may also be reused for receiving and transmitting the radio frequency signal of the partial 5G frequency band.
The radio frequency circuit provided In this embodiment can simultaneously implement a Multiple-In Multiple Out (MIMO) technology and a Sounding Reference Signal (SRS) round-robin technology for communication based on signals In Multiple different frequency bands, and for example, the radio frequency circuit at least includes 4 antennas 7, which is used to explain an operating principle of the radio frequency circuit:
(1) Under a Non-independent operation (NSA) mode, the radio frequency circuit can simultaneously support two communication modes of a first frequency band and a second frequency band, the radio frequency control module 1 can control the first radio frequency transceiver module 2 to send the SRS radio frequency signal of the first frequency band to the first frequency division module 4, the first frequency division module 4 divides the frequency of the SRS radio frequency signal of the first frequency band and then gates a channel by using the first switch 6, and the SRS radio frequency signal of the first frequency band is sent to a base station through the antenna 71 and/or the antenna 72, so that the SRS signal transmission of 1T2R (2 channels of 1 transmitter) of the first frequency band is realized. The antenna 71 and the antenna 72 may also receive a radio frequency signal of a first frequency band sent by the base station, gate a channel through the first switch 6, frequency-divide the radio frequency signal of the first frequency band through the first frequency division module 4, and send the frequency-divided radio frequency signal to the first radio frequency transceiver module 2, and the first radio frequency transceiver module 2 receives the radio frequency signal of the first frequency band and sends the radio frequency signal to the radio frequency control module 1 for signal processing. The radio frequency control module 1 may further control the second radio frequency transceiver module 3 to transmit the SRS radio frequency signal in the second frequency band to the second frequency dividing module 5, and the second frequency dividing module 5 frequency-divides the SRS radio frequency signal in the second frequency band and then transmits the SRS radio frequency signal in the second frequency band to the base station through the antenna 73 and the antenna 74, so that the SRS signal in the second frequency band 1T2R is transmitted in turn. The antenna 73 and the antenna 74 may receive a radio frequency signal of a second frequency band sent by the base station, and may also receive a radio frequency signal of a first frequency band sent by the base station, the second frequency division module 5 frequency-divides the radio frequency signal of the second frequency band and sends the frequency-divided radio frequency signal to the second radio frequency transceiver module 3, the first radio frequency transceiver module 2 frequency-divides the radio frequency signal of the first frequency band and sends the frequency-divided radio frequency signal to the first radio frequency transceiver module 2, and the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 respectively send the received radio frequency signals to the radio frequency control module 1 for signal processing.
(2) In the Stand Alone (SA) mode, the radio frequency circuit supports the communication mode of the first frequency band, and the first radio frequency transceiver module 2 can still implement SRS signal transmission and reception of the radio frequency signal of the first frequency band 1T 2R. The second radio frequency transceiver module 3 exits the communication mode of the radio frequency signal in the second frequency band, and is multiplexed in the transceiving of a part of the radio frequency signal in the first frequency band, specifically, the radio frequency control module 1 may control the second radio frequency transceiver module 3 to transmit the SRS radio frequency signal in the first frequency band to the second frequency division module 5, and the second frequency division module 5 frequency-divides the SRS radio frequency signal in the first frequency band and then transmits the SRS radio frequency signal in the first frequency band to the base station through the antenna 73 and the antenna 74, respectively. Meanwhile, the antenna 73 and the antenna 74 are used only for reception of radio frequency signals of the first frequency band.
In the prior art, in order to support communications of different frequency bands simultaneously, a radio frequency circuit of a 1T4R (1 transmitting device with 4 channels) or a 2T4R (2 transmitting devices with 4 channels) structure is generally respectively set for radio frequency signals of different frequency bands, a plurality of front end radio frequency devices for implementing transmission and reception of radio frequency signals of different frequency bands, a plurality of channel selection switches, a plurality of frequency dividing devices or combining devices, and a plurality of antennas (generally about 8) need to be set, too many devices and antennas will cause the structure of the radio frequency circuit to be complex, the line loss is large, not only the design cost and the layout area of the radio frequency circuit are increased, but also adverse effects can be caused on the radio frequency performance of the radio frequency circuit.
In the radio frequency circuit provided in the embodiment of the present invention, in a non-independent operating mode, the radio frequency control module controls the first radio frequency transceiver module to implement SRS radio frequency signal transmission in a first frequency band 1T2R by using the first frequency division module, the first switch, and the at least two antennas, and controls the second radio frequency transceiver module to implement SRS radio frequency signal transmission in a second frequency band and receive a part of the first frequency band radio frequency signals by using the second frequency division module and the at least two antennas. In the independent working mode, the radio frequency control module can also control the second radio frequency transceiver module to be reused for transceiving the radio frequency signals of the first frequency band, so that the number of radio frequency devices in the radio frequency circuit can be obviously reduced. According to the technical scheme of the embodiment, communication of different frequency bands can be achieved through four antennas, the structure of the radio frequency circuit is simplified, the layout area of radio frequency devices is reduced, the design cost of the radio frequency circuit is reduced, the radio frequency performance and the practicability of the radio frequency circuit are improved, and the commercialization of communication products is facilitated. In addition, the transceiving of the radio frequency signals of the first frequency band and the transceiving of the radio frequency signals of the second frequency band can be carried out simultaneously or independently, the functional module supporting the transceiving of the radio frequency signals of the first frequency band and the functional module supporting the transceiving of the radio frequency signals of the second frequency band in the radio frequency circuit can be arranged on a common board, and the two functional modules can also be arranged on separate boards due to the fact that the circuit is simple, so that the flexibility of the layout of the radio frequency circuit is improved.
Referring to fig. 1, optionally, the first frequency band includes a 5G frequency band, and the second frequency band includes an LTE frequency band. Specifically, the first Radio Frequency transceiver module 2 may be configured to receive or transmit Radio Frequency signals in a 5G Frequency band, and the third Generation Partnership project (3 rd Generation Partnership project,3 gpp) defines two Frequency Ranges (FR) used by 5G New Radio, including FR1 and FR2. The frequency range of the FR1 is 450M-6000Mhz, which includes a part of the 2/3/4G frequency band and a part of the newly added frequency band, and since the FR1 radio spectrum is below 6G, it is also commonly called Sub-6G. The frequency range of FR2 is 24250Mhz-52600Mhz, which is also called millimeter wave because the wavelength of this part of the spectrum has entered the millimeter scale range. The first radio frequency transceiver module 2 is capable of supporting reception and transmission of radio frequency signals of at least part of the FR1 and FR2 frequency ranges. The second radio frequency transceiver module 3 may be configured to receive or transmit a radio frequency signal based on a 4G Long Term Evolution (LTE) frequency band, and since the LTE frequency band overlaps with a partial frequency band of the 5G frequency band, the second radio frequency transceiver module 3 may also be reused for receiving and transmitting the radio frequency signal of the 5G frequency band.
Specifically, referring to fig. 1, in the technical solution of the embodiment of the present invention, in the NSA operating mode, the radio frequency control module 1 may control the first radio frequency transceiver module 2 to implement the round sending of SRS radio frequency signals in different 5G frequency bands and the receiving of radio frequency signals in different 5G frequency bands through the first frequency dividing module 4, the first switch 6, the antenna 71 and the antenna 72; the radio frequency control module 1 may also control the second radio frequency transceiver module 3 to implement SRS radio frequency signal transmission in different LTE frequency bands and receive radio frequency signals in different LTE frequency bands through the second frequency dividing module 5, the antenna 73 and the antenna 74. In the SA working mode, the first radio frequency transceiver module 2 can still achieve alternate transmission of SRS radio frequency signals in different 5G frequency bands and reception of radio frequency signals in different 5G frequency bands; the second rf transceiver module 3 exits the 4G communication mode and is multiplexed to receive and transmit the rf signals in the 5G frequency band, that is, the rf control module 1 may control the second rf transceiver module 3 to receive the rf signals in the 5G frequency band through the second frequency dividing module 5, the antenna 73, and the antenna 74. According to the technical scheme of the embodiment, the number of radio frequency devices in the radio frequency circuit is reduced, 4G communication and 5G communication can be achieved only through four antennas, the structure of the radio frequency circuit is simplified, the layout area of the radio frequency devices is reduced, the design cost of the radio frequency circuit is reduced, the radio frequency performance and the practicability of the radio frequency circuit are improved, and the commercialization of 5G communication products is facilitated.
Fig. 2 is a schematic block diagram of another rf circuit according to an embodiment of the present invention. As shown in fig. 2, optionally, the first rf transceiver module 2 includes a plurality of first rf transceivers 21 of different first frequency bands, and a first diversity receiver 22 and a plurality of sub-diversity receivers 23 corresponding to each first rf transceiver 21, where the sub-diversity receivers 23 include a first sub-diversity receiver 231 and a second sub-diversity receiver 232. Optionally, the first frequency band comprises a 5G frequency band.
The radio frequency control module 1 includes a plurality of radio frequency signal terminals c, first terminals of the first radio frequency transceiver 21, the first diversity receiver 22, the first sub-diversity receiver 231, and the second sub-diversity receiver 232 are respectively connected to different radio frequency signal terminals c of the radio frequency control module 1, second terminals of the first radio frequency transceiver 21 and the first diversity receiver 22 are respectively connected to the first frequency division module 4, and second terminals of the first sub-diversity receiver 231 and the second sub-diversity receiver 232 are connected to the second frequency division module 5.
Specifically, referring to fig. 2, the first radio frequency transceiver module 2 may be a radio frequency module based on a diversity reception technology, each first radio frequency transceiver 21 is respectively configured to implement reception and transmission of radio frequency signals in different frequency bands in a 5G frequency band, and the first sub-diversity receiver 231 and the second sub-diversity receiver 232 in the first diversity receiver 22 and the plurality of sub-diversity receivers 23 are respectively configured to implement diversity reception of radio frequency signals in the corresponding 5G frequency band. Fig. 2 only shows that the first rf transceiver module 2 includes the first rf transceiver 21 with three different 5G frequency bands, for example, the first rf transceiver 21a and the corresponding first diversity receiver 22a, the first diversity receiver 231a and the second diversity receiver 232a may correspond to rf signals in a frequency band of 5G nr77 (uplink 3300-4200Mhz, downlink 3300-4200 Mhz) and/or n78 (uplink 3300-3800Mhz, downlink 3300-3800 Mhz), the first rf transceiver 21b and the corresponding first diversity receiver 22b, the first diversity receiver 231b and the second diversity receiver 232b may correspond to rf signals in a frequency band of 5G n79 (uplink 4400-5000Mhz, downlink 3300-5000 Mhz), the first rf transceiver 21c and the corresponding first diversity receiver 22c may correspond to rf signals in a frequency band of 5G ng 41 (uplink 4400-2496 Mhz, downlink 4400-5000 Mhz), the first rf transceiver 21c and the corresponding first diversity receiver 22c may correspond to rf signals in a frequency band of 5G ng 41 (uplink 4400-2496 hz, downlink mz 90, uplink diversity receiver 231a frequency band, a frequency band of which may be used in a frequency band, and a frequency band of SRS receiver 21b, and a frequency band of which may be determined by combining the first rf transceiver module 2, and the actual transceiver module 2 may include more different frequency band.
With continuing reference to fig. 2, optionally, the first frequency-dividing module 4 includes a first combiner 41 and a second combiner 42, the second ends of the plurality of first radio frequency transceivers 21 are respectively connected to different first ends f of the first combiner 41, the second ends of different first diversity receivers 22 are connected to different first ends h of the second combiner 42, and the second ends g of the first combiner 41 and the second ends i of the second combiner 42 are respectively connected to the first end a of the first switch 6.
Specifically, each of the first combiner 41 and the second combiner 42 may be a radio frequency device having a plurality of first ends and a second end, the first ends of the first combiner 41 and the second combiner 42 serve as input ports of radio frequency signals of different frequency bands, the second ends serve as output ports of the radio frequency signals, and the first combiner 41 and the second combiner 42 may combine received multiple radio frequency signals of different frequency bands into one path and send the path to the first switch 6. Fig. 2 only schematically shows the case where the first combiner 41 includes three first terminals f1 to f3, and the second combiner 42 includes three first terminals h1 to h 3. In practical applications, if the first rf transceiver module 2 includes a plurality of first rf transceivers 21 with different frequency bands and corresponding first diversity receivers 22, the number of the first rf transceivers 21 may be combined to select the first combiners 41 with the same number of first ends f, and the number of the first diversity receivers 22 may be combined to select the second combiners 42 with the same number of first ends h. Therefore, the radio frequency signals of different 5G frequency bands sent by each first radio frequency transceiver 21 can be combined into one channel to be sent, and the first combiner 41 can receive the radio frequency signals through one channel, frequency-divide the received radio frequency signals and send the frequency-divided signals to each first radio frequency transceiver 21 respectively; the second combiner 42 can receive the radio frequency signal through one channel, divide the frequency of the received radio frequency signal and then send the divided frequency signal to each first diversity receiver 22, and combine and divide the frequency through the first combiner 41 and the second combiner 42, which is beneficial to reducing the number of front and rear radio frequency devices and simplifying the structure of the radio frequency circuit.
Fig. 3 is a schematic block diagram of another rf circuit according to an embodiment of the present invention. As shown in fig. 3, optionally, the first frequency-dividing module 4 includes a first combiner 41 and a second combiner 42, and the radio frequency circuit further includes a second switch 61 and a third switch 62. The first combiner 41 includes three first terminals f and one second terminal g, the second combiner 42 includes three first terminals h and one second terminal i, the second switch 61 includes a plurality of first terminals p and one second terminal b3, the third switch 62 includes a plurality of first terminals q and one second terminal b4, the second terminal b3 of the second switch 61 and the second terminals of two first rf transceivers 21 are respectively connected to different first terminals f of the first combiner 41, the second terminals of the remaining first rf transceivers 21 are respectively connected to different first terminals p of the second switch 61, the second terminal b4 of the third switch 62 and the second terminals of two first diversity receivers 22 are respectively connected to different first terminals h of the second combiner 42, the second terminals of the remaining first diversity receivers 22 are respectively connected to different first terminals q of the third switch 62, and the second terminal g of the first combiner 41 and the second terminal i of the second combiner 42 are respectively connected to the first terminal a of the first switch 6.
Specifically, fig. 3 shows a connection situation of each radio frequency device in the radio frequency circuit when the first radio frequency transceiver module 2 includes four first radio frequency transceivers 21 of different frequency bands and corresponding first diversity receivers 22 and multiple sub-diversity receivers 23, each of the first combiner 41 and the second combiner 42 may be a three-terminal combiner having three first ends, each of the second switch 61 and the third switch 62 may be a double-pole single-throw switch having two first ends and one second end, in combination with the number of the four first radio frequency transceivers 21, any two of the four first radio frequency transceivers 21a to 21d are respectively connected to two different first ends of the first combiner 41, and the remaining first radio frequency transceivers 21 are connected to the other first end of the first combiner 41 through the second switch 61, so that the radio frequency signals output by the multiple first radio frequency transceivers 21 can all be combined into one path through the first combiner 41 to be sent out. Similarly, any two of the four first diversity receivers 22 a-22 d may be connected to two different first ends of the second combiner 42, and the remaining first diversity receivers 22 may be connected to another first end of the second combiner 42 through the third switch 62, so that the second combiner 42 can divide the received rf signal and transmit the divided rf signal to the plurality of first diversity receivers 22. The arrangement of the second switch 61 and the third switch 62 can reduce the trace length of the plurality of first rf transceivers 21 connected to the first combiner 41 and the plurality of first diversity receivers 22 connected to the second combiner 42, thereby reducing the layout area of the rf circuit.
Referring to fig. 2 and 3, optionally, the first switch 6 includes a plurality of first terminals a and a plurality of second terminals b, and the second terminal g of the first combiner 41 and the second terminal i of the second combiner 42 are respectively connected to different first terminals a of the first switch 6. Specifically, when the first frequency-dividing module 4 includes two combiners and the first rf transceiver module 2 is correspondingly provided with two antennas 7, the first switch 6 may be set as a double-pole double-throw switch, so that the rf signals received by the first end a1 and the first end a2 of the first switch 6 may be sent out through the antenna 71 connected to the second end b1 or the antenna 72 connected to the second end b2, the rf signals received by the antenna 71 and the antenna 72 may also be output by selecting the first end a1 or the first end a2 of the first switch 6, the multiplexing antenna 7 sends and receives the rf signals, and the number of channels for transmitting the rf signals is increased.
Referring to fig. 2 and 3, optionally, the second radio frequency transceiver module 3 includes a second radio frequency transceiver 31 and a second diversity receiver 32 in the second frequency band, first ends of the second radio frequency transceiver 31 and the second diversity receiver 32 are respectively connected to different radio frequency signal ends c of the radio frequency control module 1, and second ends of the second radio frequency transceiver 31 and the second diversity receiver 32 are respectively connected to the second frequency division module 5. Optionally, the second frequency band comprises an LTE frequency band.
Specifically, the second radio frequency transceiver module 3 may be a radio frequency module based on a diversity reception technology, the second radio frequency transceiver 31 is configured to implement reception and transmission of radio frequency signals of different frequency bands in an LTE frequency band, the second diversity receiver 32 is configured to implement diversity reception of radio frequency signals of a corresponding LTE frequency band, the radio frequency control module 1 may further control the second radio frequency transceiver module 3 to be reused for 5G communication in an independent operating mode, and receive two paths of diversity radio frequency signals through the second radio frequency transceiver 31 and the second diversity receiver 32, fig. 2 shows a case where the second radio frequency transceiver 31 and the second diversity receiver 32 are multiplexed to receive diversity reception of radio frequency signals of a 5G frequency band corresponding to the first radio frequency transceiver 21c, and fig. 3 shows a case where the second radio frequency transceiver 31 and the second diversity receiver 32 are multiplexed to receive diversity reception of radio frequency signals of a 5G frequency band corresponding to the first radio frequency transceiver 21d, so that 4G communication and 5G communication are simultaneously implemented in a radio frequency circuit, the number of radio frequency devices in the radio frequency circuit can be reduced, which is beneficial to simplification of the radio frequency circuit.
Referring to fig. 2, optionally, the second frequency-dividing module 5 includes a third combiner 51 and a fourth combiner 52, the second ends of the second rf transceiver 31 and the different first sub-diversity receiver 231 are respectively connected to a different first end j of the third combiner 51, the second ends of the second diversity receiver 32 and the different second sub-diversity receiver 232 are respectively connected to a different first end n of the fourth combiner 52, and the second end k of the third combiner 51 and the second end m of the fourth combiner 52 are respectively connected to different antennas 7.
Specifically, the radio frequency signals of different LTE bands output by the second radio frequency transceiver 31 may be sent out through the third combiner 51 and the antenna 73, the 5G or LTE radio frequency signals of different bands received by the antenna 73 may also be sent to the first sub-diversity receiver 231a, the first sub-diversity receiver 231b, and the second radio frequency transceiver 31 through the third combiner 51 by frequency division, and the 5G or LTE radio frequency signals of different bands received by the antenna 74 may be sent to the second diversity receiver 32, the second sub-diversity receiver 232a, and the second sub-diversity receiver 232b through the fourth combiner 52 by frequency division. The third combiner 51 and the fourth combiner 52 may each be a radio frequency device having a plurality of first terminals and a second terminal, fig. 2 only schematically shows that the third combiner 51 includes three first terminals j1-j3, and the fourth combiner 52 includes three first terminals n1-n2, in practical applications, the third combiner 51 having the number corresponding to the first terminal j may be selected in combination with the number of the first sub-diversity receivers 231 and the multiplexing condition of the second radio frequency transceiver 31, and the fourth combiner 52 having the number corresponding to the first terminal n may be selected in combination with the number of the second sub-diversity receivers 232 and the multiplexing condition of the second diversity receiver 32. Therefore, the antenna 73 and the antenna 74 which are arranged corresponding to 4G communication can receive and transmit radio frequency signals of different LTE frequency bands and can also multiplex diversity reception of radio frequency signals of different 5G frequency bands, the antenna 73 and the antenna 74 are effectively utilized, the number of the antennas 7 in the radio frequency circuit is reduced, and the structure of the radio frequency circuit is simplified.
Referring to fig. 3, optionally, the second frequency dividing module 5 includes a third combiner 51 and a fourth combiner 52, the radio frequency circuit further includes a fourth switch 63 and a fifth switch 64, the third combiner 51 includes three first terminals j and one second terminal k, the fourth combiners 52 each include three first terminals n and one second terminal m, the fourth switch 63 includes a plurality of first terminals r and one second terminal b5, the fifth switch 64 includes a plurality of first terminals s and one second terminal b6, the second terminal b5 of the fourth switch 63, the second terminal of the second radio frequency transceiver 31, and the second terminal of one first sub-diversity receiver 231 are respectively connected to different first terminals j of the third combiner 51, the second terminals of the remaining first sub-diversity receivers 231 are respectively connected to different first terminals r of the fourth switch 63, the second terminals b6 of the fifth switch 64, the second terminal of the second diversity receiver 32, and the second terminal of one second sub-diversity receiver 232 are respectively connected to different first terminals n of the fourth combiner 52, and the second terminals of the remaining second sub-diversity receivers 232 are respectively connected to different second terminals of the third combiner 52, and the fourth sub-diversity receiver 51 are respectively connected to different second terminals k of the third antenna 51 and the fourth diversity receiver 51.
Specifically, fig. 3 shows that the first rf transceiver 21a is correspondingly provided with a first sub-diversity receiver 231a and a second sub-diversity receiver 232a, the first rf transceiver 21b is correspondingly provided with a first sub-diversity receiver 231b and a second sub-diversity receiver 232b, the first rf transceiver 21c is correspondingly provided with a first sub-diversity receiver 231c and a second sub-diversity receiver 232c, the second rf transceiver 31 and the second sub-diversity receiver 32 can be multiplexed as two sub-diversity receivers of the first rf transceiver 21d, both the third combiner 51 and the fourth combiner 52 can be three-terminal combiners with three first ends, the fourth switch 63 and the fifth switch 64 can be set as double-pole single-throw switches with two first ends and one second end in combination with the number of the first rf transceivers 21 and the multiplexing condition of the second rf transceiver 31 and the second sub-diversity receiver 32, the second rf transceiver 31 and any one of the first sub-diversity receivers 231 are connected to two different first ends of the third switch, and the remaining first rf diversity receivers 51 can be connected to the other third terminal through the other multi-band rf diversity receiver 51, thereby realizing multi-band signal receiving efficiency. Similarly, the second diversity receiver 32 and any one of the second sub-diversity receivers 232 may be respectively connected to two different first ends n of the fourth combiner 52, and the remaining second sub-diversity receivers 232 may be connected to the other first end n of the fourth combiner 52 through the fifth switch 64, so that not only the diversity reception efficiency of the radio frequency signals in the LTE frequency band may be ensured, but also the diversity reception of the radio frequency signals in a plurality of different 5G frequency bands may be achieved. The fourth switch 63 and the fifth switch 64 are arranged to reduce the trace length of the plurality of first sub-diversity receivers 231 connected to the third combiner 51 and the plurality of second sub-diversity receivers 232 connected to the fourth combiner 52, thereby reducing the layout area of the rf circuit.
Fig. 4 is a schematic block diagram of another rf circuit according to an embodiment of the present invention. As shown in fig. 4, optionally, the radio frequency control module 1 includes a radio frequency chip 11 and a baseband chip 12, the radio frequency chip 11 is electrically connected to the baseband chip 12, and the radio frequency chip 11 is electrically connected to the first radio frequency transceiver module 2, the second radio frequency transceiver module 3, the first frequency dividing module 4, the second frequency dividing module 5, and the first switch 6, respectively. In particular, the baseband chip 12 may be used to synthesize a radio frequency signal to be transmitted by the radio frequency circuit and decode the received radio frequency signal. When transmitting radio frequency signals, compiling the audio signals into baseband codes; when receiving the signal, the baseband code is decoded into an audio signal. Meanwhile, the baseband chip 12 is also responsible for compiling address information, text information, picture information, and the like. The baseband chip 12 can support multiple network systems, such as 2G, 3G, 4G, 5G, wiFi, and the like. The baseband chip 12 may include various functional units such as a CPU processor, channel encoder, digital signal processor, modem, and interface module. The radio frequency chip 11 may be a radio frequency front-end chip, and the baseband chip 12 may control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to receive and transmit radio frequency signals of different frequency bands through the radio frequency chip 11, control the first frequency dividing module 4 and the second frequency dividing module 5 to perform combining or frequency dividing, and control the first switch 6 to gate a channel for transmitting or receiving the radio frequency signals.
Fig. 5 is a schematic block diagram of another rf circuit according to an embodiment of the present invention. As shown in fig. 5, optionally, the rf chip 11 is electrically connected to the first rf transceiver module 2 and the second rf transceiver module 3, respectively, and the baseband chip 12 is electrically connected to the first frequency-dividing module 4, the second frequency-dividing module 5, and the first switch 6, respectively. Specifically, the baseband chip 12 may control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to receive and transmit radio frequency signals of different frequency bands through the radio frequency chip 11, and the baseband chip 12 may also directly control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to receive and transmit radio frequency signals of different frequency bands, control the first frequency division module 4 and the second frequency division module 5 to perform combining or frequency division, and control the first switch 6 to gate a channel for transmitting or receiving radio frequency signals.
Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the terminal device 100 includes a radio frequency circuit (not shown in fig. 6) provided by an embodiment of the present invention. Fig. 6 illustrates a case where the terminal device 100 is a mobile phone, and in practical application, the terminal device 100 may also be other intelligent terminal devices with communication functions, such as: the terminal device 100 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the embodiment of the present invention is not limited thereto. The terminal device provided by the embodiment of the present invention includes the radio frequency circuit provided by the above embodiment of the present invention, and thus has the above beneficial effects, which are not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. A radio frequency circuit, comprising:
the system comprises a radio frequency control module, a first radio frequency transceiving module, a second radio frequency transceiving module, a first frequency division module, a second frequency division module, a first switch and a plurality of antennas;
the first radio frequency transceiver module is connected to a first end of the first switch through the first frequency dividing module, at least two antennas are respectively connected to different second ends of the first switch, the first radio frequency transceiver module and the second radio frequency transceiver module are connected to the at least two antennas through the second frequency dividing module, and the antennas connected to the first switch and the second frequency dividing module are different;
the radio frequency control module is used for controlling the first radio frequency transceiver module to transmit and receive radio frequency signals of a first frequency band through the first frequency division module, the first switch and the corresponding antenna, and controlling the first radio frequency transceiver module and the second radio frequency transceiver module to respectively receive radio frequency signals of the first frequency band and transmit and receive radio frequency signals of a second frequency band through the second frequency division module and the corresponding antenna, wherein at least part of frequency bands of the radio frequency signals of the first frequency band and the radio frequency signals of the second frequency band are overlapped;
in a non-independent operating mode, the radio frequency control module controls the first radio frequency transceiver module to realize alternate transmission of radio frequency signals of a first frequency band by using the first frequency division module, the first switch and the at least two antennas, and controls the second radio frequency transceiver module to realize transmission and reception of radio frequency signals of a second frequency band and reception of a part of radio frequency signals of the first frequency band by using the second frequency division module and the at least two antennas;
and under the independent working mode, the radio frequency control module controls the second radio frequency transceiving module to be reused for transceiving the first frequency band radio frequency signal.
2. The radio frequency circuit according to claim 1, wherein the first frequency band comprises a 5G frequency band, and the second frequency band comprises an LTE frequency band.
3. The rf circuit of claim 1, wherein the first rf transceiver module comprises:
the system comprises a plurality of first radio frequency transceivers of different first frequency bands, and a first diversity receiver and a plurality of sub diversity receivers which are arranged corresponding to each first radio frequency transceiver, wherein the sub diversity receivers comprise a first sub diversity receiver and a second sub diversity receiver;
the radio frequency control module comprises a plurality of radio frequency signal ends, first ends of the first radio frequency transceiver, the first diversity receiver, the first sub-diversity receiver and the second sub-diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, second ends of the first radio frequency transceiver and the first diversity receiver are respectively connected to the first frequency division module, and second ends of the first sub-diversity receiver and the second sub-diversity receiver are connected to the second frequency division module.
4. The RF circuit of claim 3, wherein the first frequency-dividing module includes a first combiner and a second combiner, second terminals of the first RF transceivers are respectively connected to different first terminals of the first combiner, second terminals of different first diversity receivers are connected to different first terminals of the second combiner, and second terminals of the first combiner and the second combiner are respectively connected to the first terminals of the first switches.
5. The RF circuit of claim 3, wherein the first frequency-dividing module includes a first combiner and a second combiner, each of the first combiner and the second combiner including three first terminals and one second terminal;
the radio frequency circuit further includes:
the second ends of the second switch and the second ends of the two first radio frequency transceivers are respectively connected to different first ends of the first combiner, the second ends of the rest first radio frequency transceivers are respectively connected to different first ends of the second switch, the second ends of the third switch and the second ends of the two first diversity receivers are respectively connected to different first ends of the second combiner, the second ends of the rest first diversity receivers are respectively connected to different first ends of the third switch, and the second ends of the first combiner and the second combiner are respectively connected to first ends of the first switch.
6. The RF circuit of claim 4 or 5, wherein the first switch includes a plurality of first terminals and a plurality of second terminals, and the second terminals of the first and second combiners are respectively connected to different first terminals of the first switch.
7. The RF circuit of claim 3, wherein the second RF transceiver module includes a second RF transceiver in a second frequency band and a second diversity receiver;
the first ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, and the second ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to the second frequency division module.
8. The RF circuit according to claim 7, wherein the second frequency-dividing module includes a third combiner and a fourth combiner, the second RF transceiver and the second terminal of the different first sub-diversity receiver are respectively connected to the different first terminal of the third combiner, the second terminal of the second diversity receiver and the second terminal of the different second sub-diversity receiver are respectively connected to the different first terminal of the fourth combiner, and the second terminals of the third combiner and the fourth combiner are respectively connected to different antennas.
9. The RF circuit of claim 7, wherein the second frequency-dividing module comprises a third combiner and a fourth combiner, each of the third combiner and the fourth combiner comprising three first terminals and one second terminal;
the radio frequency circuit further includes a fourth switch and a fifth switch, where the fourth switch and the fifth switch each include multiple first terminals and a second terminal, the second terminal of the fourth switch, the second terminal of the second radio frequency transceiver, and the second terminal of one of the first sub-diversity receivers are respectively connected to different first terminals of the third combiner, the second terminals of the other first sub-diversity receivers are respectively connected to different first terminals of the fourth switch, the second terminal of the fifth switch, the second terminal of the second diversity receiver, and the second terminal of one of the second sub-diversity receivers are respectively connected to different first terminals of the fourth combiner, the second terminals of the other second sub-diversity receivers are respectively connected to different first terminals of the fifth switch, and the second terminals of the third combiner and the fourth combiner are respectively connected to different antennas.
10. The RF circuit of claim 1, wherein the RF control module comprises an RF chip and a baseband chip, and the RF chip is electrically connected to the baseband chip;
the radio frequency chip is electrically connected with the first radio frequency transceiver module, the second radio frequency transceiver module, the first frequency division module, the second frequency division module and the first switch respectively; or the radio frequency chip is electrically connected with the first radio frequency transceiver module and the second radio frequency transceiver module respectively, and the baseband chip is electrically connected with the first frequency division module, the second frequency division module and the first switch respectively.
11. A terminal device, characterized in that it comprises a radio frequency circuit according to any one of claims 1 to 10.
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| CN111817745B (en) * | 2020-07-28 | 2022-08-05 | 惠州Tcl移动通信有限公司 | Radio frequency device and mobile terminal |
| CN114285422B (en) * | 2020-09-27 | 2023-08-11 | Oppo广东移动通信有限公司 | Radio frequency DRX device, radio frequency system and communication equipment |
| CN115589232A (en) * | 2020-09-27 | 2023-01-10 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment |
| CN114337693B (en) * | 2020-09-27 | 2023-11-10 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency receiving and transmitting system and communication equipment |
| CN112164893B (en) * | 2020-09-30 | 2023-12-01 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
| CN114759943B (en) * | 2020-12-29 | 2023-06-02 | 华为技术有限公司 | Radio frequency front end module, and method and device for controlling radio frequency front end module |
| CN113315528B (en) * | 2021-06-08 | 2022-06-21 | 展讯通信（上海）有限公司 | Radio frequency circuit, terminal equipment and radio frequency signal sending method |
| CN113489503B (en) * | 2021-07-01 | 2022-09-27 | 维沃移动通信有限公司 | Radio frequency architecture and electronic device |
| CN114124130B (en) * | 2021-08-25 | 2023-09-26 | 闻泰通讯股份有限公司 | Radio frequency receiving and transmitting system, radio frequency channel detection method and terminal equipment |
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