Discrete radio frequency front-end circuit

Abstract

The utility model provides a discrete radio frequency front-end circuit, which comprises a transceiving control module, a plurality of power amplification modules, a plurality of noise amplification modules, a plurality of switching modules and a plurality of antenna modules. One end of each power amplification module and one end of each noise amplification module are connected with the transmit-receive control module. At least one power amplifier module in the plurality of power amplifier modules is connected to one switching module, and each switching module is connected to each antenna module. At least one of the plurality of switching modules is also connected to a noise amplification module. And the switching module is used for switching channels corresponding to the antenna modules and realizing an antenna polling function. And the switching module is used for switching the corresponding paths of the antenna modules, so that the design of a small-size, low-cost and multifunctional discrete radio frequency front-end circuit is formed.

Description

Technical Field

[0001] The present application relates to the technical field of radio frequency front - end, and more particularly, to a discrete radio frequency front - end circuit. Background Art

[0002] With the development of the fifth - generation mobile communication technology (5th Generation Mobile Communication Technology, abbreviated as 5G), in order to meet rich communication requirements, the design solutions of radio frequency front - ends are becoming more and more diversified and complex.

[0003] In the prior art, 5G projects are generally designed based on the Phase 5N framework and the Phase 7 framework. However, if the design is unreasonable, problems such as too large volume and too high cost will occur. Therefore, how to reasonably design the radio frequency front - end under these two frameworks is a problem that needs to be solved. Summary of the Utility Model

[0004] The purpose of the present application is to provide a discrete radio frequency front - end circuit to solve the problems of high cost and large volume in the prior art in view of the deficiencies in the above - mentioned prior art.

[0005] To achieve the above - mentioned purpose, the technical solution adopted in the present application is as follows:

[0006] In a first aspect, the present application provides a discrete radio frequency front - end circuit, which includes: a transceiver control module, a plurality of power amplifier modules, a plurality of noise amplification modules, a plurality of switching modules, and a plurality of antenna modules;

[0007] One end of each of the power amplifier modules and each of the noise amplification modules is connected to the transceiver control module;

[0008] At least one power amplifier module among the plurality of power amplifier modules is connected to one of the switching modules, and each of the switching modules is respectively connected to at least one of the antenna modules, and the power amplifier modules not connected to the switching modules are connected to each other;

[0009] The plurality of switching modules are also connected to the noise amplification module;

[0010] The switching module is used to switch the corresponding paths of each of the antenna modules and implement the antenna polling function;

[0011] The discrete radio frequency front - end circuit sequentially sends the received and amplified radio frequency signals to the transceiver control module through the antenna module, the switching module, the noise amplification module, and the power amplifier module, and sequentially transmits the radio frequency signals output by the transceiver control module through the power amplifier module, the switching module, and the antenna module.

[0012] Optionally, the number of the antenna modules and the power amplifier modules is 4, and the number of the noise amplification modules and the switching modules is 2.

[0013] Optionally, the multiple antenna modules include: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module; the multiple power amplifier modules include: a first power amplifier module, a second power amplifier module, a third power amplifier module, and a fourth power amplifier module; the multiple noise amplification modules include: a first noise amplification module and a second noise amplification module; the multiple switching modules include: a first switching module and a second switching module; the discrete radio frequency front-end circuit further includes: a switch module;

[0014] A first signal end of the first antenna module is connected to a first receiving end of the first switching module;

[0015] A second receiving end of the first switching module is connected to a first receiving end of the second switching module, a third receiving end of the first switching module is connected to a first signal end of the third antenna module, a first sending end of the first switching module is connected to a second receiving end of the second switching module, a fourth receiving end of the first switching module is connected to a first sending end of the first power amplifier module, and a second sending end of the first switching module is connected to a first end of the switch module;

[0016] A second end of the switch module is connected to a second receiving end of the first noise amplification module, and a third end of the switch module is connected to a first end of the third power amplifier module;

[0017] A high-frequency receiving end of the first power amplifier module is connected to a high-frequency sending end of the transceiver control module, a low-frequency receiving end of the first power amplifier module is connected to a low-frequency sending end of the transceiver control module, and a filtering end of the first power amplifier module is connected to a first receiving end of the first noise amplification module;

[0018] A third receiving end of the first noise amplification module is connected to a second end of the third power amplifier module, and a sending end of the first noise amplification module is connected to a first receiving end of the transceiver control module;

[0019] A third end of the third power amplifier module is connected to a first sending end of the transceiver control module;

[0020] A second signal end of the third antenna module is connected to a first end of the second power amplifier module;

[0021] The second end of the second power amplifier module is connected to the second signal end of the fourth antenna module, the third end of the second power amplifier module is connected to the third end of the fourth power amplifier module, the receiving end of the second power amplifier module is connected to the second transmitting end of the transceiver control module, and the transmitting end of the second power amplifier module is connected to the second receiving end of the transceiver control module;

[0022] The first signal end of the second antenna module is connected to the third receiving end of the second switching module;

[0023] The fourth receiving end of the second switching module is connected to the first signal end of the fourth antenna module, the first transmitting end of the second switching module is connected to the second receiving end of the second noise amplification module, and the second transmitting end of the second switching module is connected to the first receiving end of the second noise amplification module;

[0024] The transmitting end of the second noise amplification module is connected to the third receiving end of the transceiver control module;

[0025] The first end of the fourth power amplifier module is connected to the second signal end of the second antenna module, the second end of the fourth power amplifier module is connected to the second signal end of the first antenna module, the receiving end of the fourth power amplifier module is connected to the third transmitting end of the transceiver control module, and the transmitting end of the fourth power amplifier module is connected to the fourth receiving end of the transceiver control module.

[0026] Optionally, the number of the antenna module, the power amplifier module, the noise amplification module, and the switching module is 2 each.

[0027] Optionally, the multiple antenna modules include: a fifth antenna module and a sixth antenna module; the multiple power amplifier modules include: a fifth power amplifier module and a sixth power amplifier module; the multiple noise amplification modules include: a third noise amplification module and a fourth noise amplification module; the multiple switching modules include: a third switching module and a fourth switching module;

[0028] The first signal end of the fifth antenna module is connected to the first end of the third switching module, and the second signal end of the fifth antenna module is connected to the first receiving end of the sixth power amplifier module;

[0029] The second end of the third switching module is connected to the third end of the fourth switching module, the third end of the third switching module is connected to the fourth end of the fourth switching module, and the fourth end of the third switching module is connected to the first end of the fifth power amplifier module;

[0030] The high-frequency receiving end of the fifth power amplifier module is connected to the high-frequency transmitting end of the transceiver control module, the low-frequency receiving end of the fifth power amplifier module is connected to the low-frequency receiving end of the transceiver control module, and the filtering end of the fifth power amplifier module is connected to the receiving end of the third noise amplification module;

[0031] The transmitting end of the third noise amplification module is connected to the first receiving end of the transceiver control module;

[0032] The first signal end of the sixth antenna module is connected to the first end of the fourth switching module, and the second signal end of the sixth antenna module is connected to the second receiving end of the sixth power amplifier module;

[0033] The second end of the fourth switching module is connected to the receiving end of the fourth noise amplification module;

[0034] The transmitting end of the fourth noise amplification module is connected to the second receiving end of the transceiver control module;

[0035] The third receiving end of the sixth power amplifier module is connected to the transmitting end of the transceiver control module, and the transmitting end of the sixth power amplifier module is connected to the third receiving end of the transceiver control module.

[0036] Optionally, one of the multiple power amplifier modules includes: a first power amplifier unit, a second power amplifier unit, and a duplex filtering unit;

[0037] The high-frequency receiving end of the first power amplifier unit is connected to the high-frequency transmitting end of the transceiver control module, and the transmitting end of the first power amplifier unit is connected to the first end of the duplex filtering unit;

[0038] The second end of the duplex filtering unit is connected to the first receiving end of the second power amplifier unit, and the third end of the duplex filtering unit is connected to the first receiving end of one of the multiple noise amplification modules;

[0039] The low-frequency receiving end of the second power amplifier unit is connected to the low-frequency transmitting end of the transceiver control module, and the first transmitting end of the second power amplifier unit is connected to the first receiving end of one of the multiple switching modules.

[0040] Optionally, the second power amplifier unit includes a low-frequency amplification sub-unit, a first switch sub-unit, a second switch sub-unit, and a combining sub-unit, where:

[0041] The first end of the low-frequency amplification sub-unit is connected to the low-frequency transmitting end of the transceiver control module, the second end of the low-frequency amplification sub-unit is connected to the first end of the first switch sub-unit, and the third end of the low-frequency amplification sub-unit is connected to the first end of the second switch sub-unit;

[0042] The second end of the first switching sub-unit is connected to the second end of the duplex filtering unit, and the third end of the first switching sub-unit is connected to the first end of the combining sub-unit;

[0043] The second end of the second switching sub-unit is connected to the second end of the duplex filtering unit, and the third end of the second switching sub-unit is connected to the second end of the combining sub-unit;

[0044] The third end of the combining sub-unit is connected to the first receiving end of one of the plurality of switching modules.

[0045] Optionally, the discrete radio frequency front-end circuit further includes: a radio frequency switch module; the radio frequency switch module includes: a combining unit, a first switching unit, and a second switching unit, where:

[0046] The first end of the combining unit is connected to the second transmitting end of the second switching module, the second end of the combining unit is connected to the first end of the first switching unit, and the third end of the combining unit is connected to the first end of the second switching unit;

[0047] The second end of the first switching unit and the second end of the second switching unit are respectively connected to the first receiving end of the second noise amplification module.

[0048] Optionally, the first antenna module includes: an antenna unit and a combiner unit;

[0049] The antenna unit is connected to the first end of the combiner unit;

[0050] The second end of the combiner unit is connected to the first receiving end of the first switching module, and the third end of the combiner unit is connected to the second end of the fourth power amplifier module.

[0051] Optionally, the discrete radio frequency front-end circuit further includes: a power switch module;

[0052] Each receiving end of the power switch module is connected to the power feedback end of one of the plurality of power amplifier modules, and the transmitting end of the power switch module is connected to the power receiving end of the transceiver control module.

[0053] In a second aspect, the present application provides a terminal, and the terminal includes the discrete radio frequency front-end circuit as described in the first aspect.

[0054] The beneficial effects of the present application are as follows: One end of each power amplifier module and each noise amplification module is connected to the transceiver control module. At least one of the multiple power amplifier modules is connected to a switching module, and each switching module is respectively connected to at least one antenna module. The power amplifier modules not connected to the switching module are connected to each other, so as to realize the antenna polling function. While detecting the signal quality of each path, the antenna module can be switched for signal transmission. The multiple switching modules are also connected to the noise amplification module. Among them, the corresponding paths of each antenna module are switched through the switching module, so as to form a discrete RF front-end circuit design with small volume and low cost. Description of the Drawings

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0056] Figure 1 FIG. is a schematic structural diagram of a discrete RF front-end circuit provided by an embodiment of the present application;

[0057] Figure 2 FIG. is a schematic structural diagram of a discrete RF front-end circuit with a 4×4 antenna structure provided by an embodiment of the present application;

[0058] Figure 3 FIG. is a schematic structural diagram of a discrete RF front-end circuit with a 2×2 antenna structure provided by an embodiment of the present application;

[0059] Figure 4 FIG. is a schematic structural diagram of a power amplifier module provided by an embodiment of the present application;

[0060] Figure 5 FIG. is a schematic structural diagram of a second power amplifier unit provided by an embodiment of the present application;

[0061] Figure 6 FIG. is a schematic structural diagram of a RF switch module provided by an embodiment of the present application;

[0062] Figure 7 FIG. is a schematic structural diagram of a first antenna module provided by an embodiment of the present application;

[0063] Figure 8 FIG. is a schematic structural diagram of a power switch module provided by an embodiment of the present application. Detailed Embodiments

[0064] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. It should be understood that the accompanying drawings in this application only serve the purpose of illustration and description, and are not used to limit the protection scope of this application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of this application. It should be understood that the operations in the flowchart may not be implemented in sequence, and steps without a logical context relationship may be reversed or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of this application.

[0065] In addition, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. The components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but only represents the selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0066] It should be noted that the term "including" will be used in the embodiments of this application to indicate the existence of the features stated thereafter, but does not exclude the addition of other features.

[0067] In the prior art, if the 5G project is designed unreasonably based on the frameworks of Phase 5N and Phase 7, problems such as excessive volume and high cost may occur. Therefore, how to reasonably design the radio frequency front end under these two frameworks is a problem that needs to be solved.

[0068] This application proposes a discrete radio frequency front-end circuit based on the Phase 5N framework. The circuit includes a transceiver control module, multiple power amplifier modules, multiple noise amplification modules, multiple switching modules, and multiple antenna modules. Multiple-input multiple-output (MIMO) can be achieved by connecting the multiple antenna modules to the switching module, and the corresponding paths of each antenna module can be switched through the switching module to implement the antenna polling function, so that the information obtained by the transceiver control module can be more comprehensive, and more accurate data transmission can be performed. Moreover, in this solution, signals are sent from the transceiver control module to multiple power amplifier modules to achieve power amplification in each frequency band and then sent out by the multiple antenna modules, so the applicable frequency band range is large and multiple regions can be compatible. The discrete radio frequency front-end circuit with the above structure is simple in structure, so it has a small volume and low cost.

[0069] Next, the structure of the above discrete radio frequency front-end circuit will be introduced. The discrete radio frequency front-end circuit includes: a transceiver control module, multiple power amplifier modules, multiple noise amplification modules, multiple switching modules, and multiple antenna modules.

[0070] Optionally, to illustrate the connection relationship between the modules, taking the discrete radio frequency front-end circuit including: a transceiver control module, 4 power amplifier modules, 2 noise amplification modules, 2 switching modules, and 4 antenna modules as an example, Figure 1 . Figure 1 is a schematic structural diagram of a discrete radio frequency front-end circuit provided by an embodiment of the present application. Next, refer to Figure 1 to introduce the discrete radio frequency front-end circuit.

[0071] Optionally, one end of each power amplifier module and each noise amplification module is connected to the transceiver control module. At least one power amplifier module among the multiple power amplifier modules is connected to a switching module, and each switching module is respectively connected to at least one antenna module, and the power amplifier modules not connected to the switching module are connected to each other. The multiple switching modules are also connected to the noise amplification module. The switching module is used to switch the corresponding paths of each antenna module and implement the antenna polling function.

[0072] Among them, the power amplifier module can be used for power amplification of low, medium, and high radio frequency signals, as well as power amplification of signals in the N77, N78, and N79 frequency bands.

[0073] The noise amplification module is used to receive weak signals at a relatively high signal level in order to achieve optimal demodulation, digitization, drive other circuits, or perform measurements.

[0074] The switching module is used to switch the corresponding paths of each antenna module, implement the transmit antenna switching (TAS) and the sounding reference signal (SRS) round-robin function. Among them, the SRS function can be applied to the four frequency bands of N41, N77, N78, and N79. Exemplarily, if there are 4 antenna modules, the switching module can be a 3-pole 3-throw switch. Specifically, during the actual operation of the discrete radio frequency front-end circuit, the operating states of each antenna module can be detected in real time. If it is detected that a certain antenna module fails, the radio frequency signal that needs to be transmitted by the antenna module will be switched to other antenna modules for transmission. Among them, the cause of the failure may be external damage, etc.

[0075] In the receiving path, the antenna module converts the received radio frequency signal into two signals in the N77, N78, and N79 frequency bands in the UHB and the Low Band, Mid Band and High Band (LMHB). Among them, the LMHB is the Sub-3GHz frequency band, and the UHB is the newly added 3-6GHz frequency band in 5G. Then, the power amplifier module amplifies the radio frequency signals in the N77, N78, and N79 frequency bands in the UHB and sends them to the transceiver control module, and amplifies the radio frequency signal in the LMHB frequency band and sends it to the transceiver control signal.

[0076] In the transmitting path, the transceiver control signal respectively sends out the radio frequency signals in the LMHB frequency band and the N77, N78, and N79 frequency bands in the UHB to at least one power amplifier module for power amplification and combination, so that the radio frequency signals in each frequency band can be switched to the same antenna module for transmission, and then the combined radio frequency signal is switched to an antenna module through the switching module for signal transmission.

[0077] Optionally, since the power amplifier modules not connected to the switching module are connected to each other, polling can be realized between each power amplifier, so as to detect the quality of each path.

[0078] Optionally, the discrete radio frequency front-end circuit sequentially sends the received and amplified radio frequency signal to the transceiver control module through the antenna module, the switching module, the noise amplification module and the power amplifier module, and sequentially transmits the radio frequency signal output by the transceiver control module through the power amplifier module, the switching module and the antenna module.

[0079] Specifically, the process of the discrete radio frequency front-end circuit receiving the radio frequency signal is as follows: after the antenna module receives the radio frequency signal, it sends the signal to the switching module, and the switching module can send the radio frequency signal to one of the multiple power amplifier modules, and then the power amplifier module amplifies the radio frequency signal and sends it to the transceiver control module. The process of the discrete radio frequency front-end circuit transmitting the radio frequency signal is as follows: after the transceiver control module outputs the radio frequency signal, it sends the radio frequency signal to the power amplifier module for amplification, and then the switching module sends the amplified signal to one of the antenna models, so that the antenna module transmits the radio frequency signal.

[0080] In this embodiment, one end of each power amplifier module and each noise amplification module is connected to the transceiver control module. At least one power amplifier module among the multiple power amplifier modules is connected to a switching module, and each switching module is respectively connected to at least one antenna module. The power amplifier modules not connected to the switching module are connected to each other, so as to realize the antenna polling function. While detecting the signal quality of each path, the antenna module can be switched for signal transmission. The multiple switching modules are also connected to the noise amplification module. Among them, the corresponding paths of each antenna module are switched through the switching module, so as to form a discrete radio frequency front-end circuit design with small volume and low cost.

[0081] Based on the above discrete radio frequency front-end circuit, two circuit structures will be introduced next, namely the 4×4 antenna structure and the 2×2 antenna structure. Which specific structure to apply is determined according to user requirements.

[0082] As an alternative implementation, the number of antenna modules and power amplifier modules is 4, and the number of noise amplification modules and switching modules is 2.

[0083] Specifically, Figure 2 is a schematic diagram of the discrete radio frequency front-end circuit structure of a 4×4 antenna structure provided by an embodiment of the present application. Next, refer to Figure 2 to introduce the specific structure of the above discrete radio frequency front-end circuit: The multiple antenna modules include: the first antenna module 2, the second antenna module 3, the third antenna module 4, and the fourth antenna module 5. The multiple power amplifier modules include: the first power amplifier module 6, the second power amplifier module 7, the third power amplifier module 8, and the fourth power amplifier module 9. The multiple noise amplification modules include: the first noise amplification module 10 and the second noise amplification module 11. The multiple switching modules include: the first switching module 12 and the second switching module 13. The discrete radio frequency front-end circuit further includes: a switch module 14.

[0084] Specifically, the connection manners of the modules in the discrete radio frequency front-end circuit of the 4×4 antenna structure are as follows:

[0085] The first signal end of the first antenna module 2 is connected to the first receiving end of the first switching module 12.

[0086] The second receiving end of the first switching module 12 is connected to the first receiving end of the second switching module 13, the third receiving end of the first switching module 12 is connected to the first signal end of the third antenna module 4, the first sending end of the first switching module 12 is connected to the second receiving end of the second switching module 13, the fourth receiving end of the first switching module 12 is connected to the first sending end of the first power amplifier module 6, and the second sending end of the first switching module 12 is connected to the first end of the switch module 14.

[0087] The second end of the switch module 14 is connected to the second receiving end of the first noise amplification module 10, and the third end of the switch module 14 is connected to the first end of the third power amplifier module 8.

[0088] The high-frequency receiving end of the first power amplifier module 6 is connected to the high-frequency sending end of the transceiver control module 1, the low-frequency receiving end of the first power amplifier module 6 is connected to the low-frequency sending end of the transceiver control module 1, and the filtering end of the first power amplifier module 6 is connected to the first receiving end of the first noise amplification module 10.

[0089] The third receiving end of the first noise amplification module 10 is connected to the second end of the third power amplifier module 8, and the transmitting end of the first noise amplification module 10 is connected to the first receiving end of the transceiver control module 1.

[0090] The third end of the third power amplifier module 8 is connected to the first transmitting end of the transceiver control module 1.

[0091] The second signal end of the third antenna module 4 is connected to the first end of the second power amplifier module 7.

[0092] The second end of the second power amplifier module 7 is connected to the second signal end of the fourth antenna module 5, the third end of the second power amplifier module 7 is connected to the third end of the fourth power amplifier module 9, the receiving end of the second power amplifier module 7 is connected to the second transmitting end of the transceiver control module 1, and the transmitting end of the second power amplifier module 7 is connected to the second receiving end of the transceiver control module 1.

[0093] The first signal end of the second antenna module 3 is connected to the third receiving end of the second switching module 13.

[0094] The fourth receiving end of the second switching module 13 is connected to the first signal end of the fourth antenna module 5, the first transmitting end of the second switching module 13 is connected to the second receiving end of the second noise amplification module 11, and the second transmitting end of the second switching module 13 is connected to the first receiving end of the second noise amplification module 11.

[0095] The transmitting end of the second noise amplification module 11 is connected to the third receiving end of the transceiver control module 1.

[0096] The first end of the fourth power amplifier module 9 is connected to the second signal end of the second antenna module 3, the second end of the fourth power amplifier module 9 is connected to the second signal end of the first antenna module 2, the receiving end of the fourth power amplifier module 9 is connected to the third transmitting end of the transceiver control module 1, and the transmitting end of the fourth power amplifier module 9 is connected to the fourth receiving end of the transceiver control module 1.

[0097] Among them, the first antenna module 2, the second antenna module 3, the third antenna module 4, and the fourth antenna module 5 can be used to receive and transmit radio frequency signals, and the first power amplifier module 6, the second power amplifier module 7, the third power amplifier module 8, and the fourth power amplifier module 9 can be used for power amplification. The first noise amplification module 10 and the second noise amplification module 11 are used to receive weak signals at a higher signal level, reduce noise, and improve the communication quality of the entire radio frequency front end. The first switching module 12 and the second switching module 13 are used to switch the corresponding paths of each of the antenna modules.

[0098] Next, based on the above connection relationship of the 4×4 antenna structure, four transmitting paths and four receiving paths will be introduced in sequence.

[0099] In the first transmission path, first, the high-frequency transmission end of the transceiver control module 1 sends an LMHB signal to the high-frequency receiving end of the first power amplifier module 6, and the low-frequency transmission end sends a signal in the 2th Generation Mobile Communication Technology (2G) frequency band to the low-frequency receiving end of the first power amplifier module 6. After receiving the LMHB signal and the 2G signal, the first power amplifier module 6 amplifies the power of the above signals and performs switch switching to output a radio frequency signal. Among them, the LMHB signal can be a signal in the 3th Generation Mobile Communication Technology (3G), 4th Generation Mobile Communication Technology (4G), and 5th Generation Mobile Communication Technology (5G), except for the signals in the N77, N78, and N79 frequency bands.

[0100] In addition, the Carrier Aggregation (CA) combination can be achieved by using the switch switching function of the first power amplifier module 6. Exemplarily, the paths of Band1 frequency band and Band3 frequency band can be opened simultaneously, so as to achieve inter-band CA of Band1 frequency band and Band3 frequency band. After the first receiving module of the first switching module 12 receives the radio frequency signal, it is sent to the pre-set first antenna module 2, so that the first antenna module 2 transmits the radio frequency signal. It should be noted that if the first antenna module 2 fails, the first switching module 12 switches to the second antenna module 3, the third antenna module 4, or the fourth antenna module 5 to transmit the radio frequency signal.

[0101] Exemplarily, the first power amplifier module 6 can be the VC7643-63 chip and the TXM chip of Vanchip Corporation, and the first switching module 12 can be a 3-pole 3-throw switch of VC1855, with a size of 2 millimeters in length and 2 millimeters in width.

[0102] In the second transmission path, first, the second transmission end of the transceiver control module 1 sends signals in the N77, N78, and N79 frequency bands to the receiving end of the second power amplifier module 7. After the second power amplifier module 7 amplifies the signals in the N77, N78, and N79 frequency bands, it sends them to the third antenna module 4 through the first end. When the third antenna module 4 fails, the second power amplifier module 7 can send the amplified signals to the fourth antenna module 5 through the second end, or send them to the fourth power amplifier module 9 through the third end, and then send them to the second antenna module 3 through the first end of the fourth power amplifier module 9, or send them to the first antenna module 2 through the second end of the fourth power amplifier module 9. It should be noted that the second power amplifier module 7 and the fourth power amplifier module 9 can be the same type of power amplifier module, each having one input and two outputs in the transmission path, and the second power amplifier module 7 and the fourth power amplifier module 9 are connected so that the signals of the two power amplifier modules can communicate with each other, enabling the signals output by the power amplifier module to be output to 4 antenna modules without the need for a switching module to switch the antenna modules, reducing the signal transmission path, thereby reducing the insertion loss and realizing the SRS function.

[0103] Exemplarily, the second power amplifier module 7 can be the VC7535-88 chip of Vanchip Semiconductor Co., Ltd.

[0104] In the third transmission path, first, the first transmission end of the transceiver control module 1 sends the N41 frequency band to the third end of the third power amplifier module 8. The amplified signal is output from the first end of the third power amplifier module 8 to the third end of the switch module 14, and then the switch module 14 sends the amplified signal to the second antenna module 3 through the first switching module 12, and the second antenna module 3 transmits it. It should be noted that in this embodiment, the 4G and 5G dual-connectivity compatibility (E-UTRAN New Radio-Duala Connectivity, ENDC) technology can be realized through the first transmission path and the third transmission path. Among them, the ENDC signal is a combination of the Long Term Evolution (LTE) signal and the New Radio (NR) signal. Therefore, to ensure that the antenna module for transmitting the LTE signal does not conflict with the antenna module for transmitting the NR signal, as an optional implementation manner, the first antenna module 2 is made to transmit the LTE signal, and the third antenna module 4 is made to transmit the NR signal. It should be understood that since the amplified signal will be transmitted through the first switching module 12 in the third transmission path, any antenna module can be made to transmit the signal as long as it is different from the antenna module for transmitting the LTE signal.

[0105] Exemplarily, the second power amplifier module 7 can be the VC7643-63 chip of Vanchip Semiconductor Co., Ltd.

[0106] It should be noted that the switch module 14 can be a single-pole double-throw switch, and the switch can be thrown to the second terminal or the third terminal. When signal transmission is performed, the switch in the switch module 14 is thrown to the third terminal. Exemplarily, it can be the VC1381 chip of Vanchip Semiconductor Co., Ltd.

[0107] In the fourth transmission path, first, the third transmission end of the transceiver control module 1 sends signals in the N77, N78, and N79 frequency bands to the receiving end of the fourth power amplifier module 9. After being power-amplified by the fourth power amplifier module 9, the signals are sent to the second antenna module 3 through the first end, or sent to the first antenna module 2 through the second end, or sent to the third end of the second power amplifier module 7 through the third end, and then sent to the second antenna module 3 through the first end of the second power amplifier module, or sent to the fourth antenna module 5 through the second end of the second power amplifier module 7.

[0108] Exemplarily, the fourth power amplifier module 9 can be the VC7535-88 chip of Vanchip Semiconductor Co., Ltd.

[0109] In the receiving path, the first antenna module 2 can be set as the primary receive (PRX), the second antenna module 3 can be set as the diversity receive (DRX), the third antenna module 4 can be set as the PRX MIMO, and the fourth antenna module 5 can be set as the DRX MIMO.

[0110] In the first receiving path, after the first antenna module 2 receives a signal, the signal can be divided into an ultra-high-frequency signal and a low, medium, and high-frequency signal. Exemplarily, the low, medium, and high-frequency signal can be a signal in the range of 699 to 2690 MHz, and the ultra-high-frequency signal can be a signal in the range of 3300 to 5950 MHz. The low, medium, and high-frequency signal is sent to the first transmission end of the first power amplifier module 6 through the first switching module 12. Since the first power amplifier module 6 works simultaneously in receiving and transmitting signals, when in the receiving path, the received low, medium, and high-frequency signal can be output to the first noise amplification module 10 through the filtering end of the first power amplifier module 6. The first noise amplification module 10 receives and amplifies the low, medium, and high-frequency signal and then inputs it to the first receiving end of the transceiver control module 1. The ultra-high-frequency signal is sent to the second end of the fourth power amplifier module 9 for amplification and then input to the fourth receiving end of the transceiver control module 1. It should be mentioned that the low, medium, and high-frequency signal can be switched to the second switching module 13 through the first switching module 12, and then sent to the third receiving end of the transceiver control module 1 after being power-amplified by the second noise amplification module 11.

[0111] In the second receiving path, after the second antenna module 3 receives a signal, the signal can be divided into a super high-frequency signal and a low, medium, and high-frequency signal. The super high-frequency signal is sent to the first end of the fourth power amplifier module 9 so that the fourth power amplifier module 9 receives and amplifies the super high-frequency signal, and the amplified signal is sent to the fourth receiving end of the transceiver control module 1 through the sending end. The low, medium, and high-frequency signal is input to the second noise amplifier module 11 through the second switching module 13 for reception and amplification, and is sent to the third receiving end of the transceiver control module 1 through the sending end of the second noise amplifier module 11. It is worth mentioning that the low, medium, and high-frequency signal can be switched to the first switching module 12 through the second switching module 13, and then sent to the first receiving end of the transceiver control module 1 after being amplified by the first noise amplifier module 10.

[0112] In the third receiving path, after the third antenna module 4 receives a signal, the signal can be divided into a super high-frequency signal and a low, medium, and high-frequency signal. The super high-frequency signal is sent to the first end of the second power amplifier module 7 for power amplification, and the amplified signal is input to the second receiving end of the transceiver control module 1 through the sending end. The low, medium, and high-frequency signal is sent to the third receiving end of the first switching module 12, and then the first switching module 12 sends the low, medium, and high-frequency signal to the first end of the third power amplifier module 8 through the third end of the switching module 14, and the second end of the third power amplifier module 8 outputs to the third receiving end of the first noise amplifier module 10. The first noise amplifier module 10 amplifies the low, medium, and high-frequency signal and sends it to the first receiving end of the transceiver control module 1 through the sending end. The low, medium, and high-frequency signal can be an N41 frequency band signal. It should be noted that the first noise amplifier module 10 cannot process PRX MIMO signals and N41 frequency band signals simultaneously.

[0113] In the fourth receiving path, after the fourth antenna module 5 receives a signal, the signal can be divided into a super high-frequency signal and a low, medium, and high-frequency signal. The super high-frequency signal is sent to the second end of the second power amplifier module 7 for power amplification, and the amplified signal is input to the second receiving end of the transceiver control module 1 through the sending end. The low, medium, and high-frequency signal is sent to the fourth receiving end of the second switching module 13, and then the first sending end of the second switching module 13 sends the low, medium, and high-frequency signal to the second receiving end of the second noise amplifier module 11. The second noise amplifier module 11 amplifies the low, medium, and high-frequency signal and sends it to the third receiving end of the transceiver control module 1 through the sending end.

[0114] In this embodiment, a low-cost, small-sized, and fully functional discrete radio frequency front-end circuit is formed by the above 4×4 antenna structure.

[0115] As another alternative embodiment, the number of antenna modules, power amplifier modules, noise amplifier modules, and switching modules is 2 each. Specifically, Figure 3It is a schematic diagram of a discrete radio frequency front-end circuit structure of a 2×2 antenna structure provided by an embodiment of the present application.

[0116] Next, refer to Figure 3 to introduce the specific structure of the above discrete radio frequency front-end circuit:

[0117] The multiple antenna modules include: a fifth antenna module 15 and a sixth antenna module 16. The multiple power amplifier modules include: a fifth power amplifier module 17 and a sixth power amplifier module 18. The multiple noise amplification modules include: a third noise amplification module 19 and a fourth noise amplification module 20. The multiple switching modules include: a third switching module 21 and a fourth switching module 22.

[0118] The first signal terminal of the fifth antenna module 15 is connected to the first end of the third switching module 21, and the second signal terminal of the fifth antenna module 15 is connected to the first receiving end of the sixth power amplifier module 18.

[0119] The second end of the third switching module 21 is connected to the third end of the fourth switching module 22, the third end of the third switching module 21 is connected to the fourth end of the fourth switching module 22, and the fourth end of the third switching module 21 is connected to the first end of the fifth power amplifier module 17.

[0120] The high-frequency receiving end of the fifth power amplifier module 17 is connected to the high-frequency transmitting end of the transceiver control module 1, the low-frequency receiving end of the fifth power amplifier module 17 is connected to the low-frequency receiving end of the transceiver control module 1, and the filtering end of the fifth power amplifier module 17 is connected to the receiving end of the third noise amplification module 19.

[0121] The transmitting end of the third noise amplification module 19 is connected to the first receiving end of the transceiver control module 1.

[0122] The first signal terminal of the sixth antenna module 16 is connected to the first end of the fourth switching module 22, and the second signal terminal of the sixth antenna module 16 is connected to the second receiving end of the sixth power amplifier module 18.

[0123] The second end of the fourth switching module 22 is connected to the receiving end of the fourth noise amplification module 20.

[0124] The transmitting end of the fourth noise amplification module 20 is connected to the second receiving end of the transceiver control module 1.

[0125] The third receiving end of the sixth power amplifier module 18 is connected to the transmitting end of the transceiver control module 1, and the transmitting end of the sixth power amplifier module 18 is connected to the third receiving end of the transceiver control module 1.

[0126] Next, on the basis of the above connection relationship of the 2×2 antenna structure, two transmission paths and two reception paths will be introduced in sequence.

[0127] In the first transmission path, the transceiver control module 1 sends the LMHB signal to the fifth power amplifier module 17 through the high-frequency transmission end and sends the 2G signal to the fifth power amplifier module 17 through the low-frequency transmission end. The fifth power amplifier module 17 amplifies and combines the above LMHB signal and 2G signal respectively, and inputs them through the first end to the fourth end of the third switching module 21. The third switching module 21 can send the combined signal to the fifth antenna module 15 for transmission through the first end, or switch the signal to the fourth switching module 22 through the second end, and send the combined signal to the sixth antenna module 16 for transmission through the first end of the fourth switching module 22.

[0128] In the second transmission path, the transceiver control module 1 sends the N77, N78, and N79 signals to the third receiving end of the sixth power amplifier module 18 through the transmission end for power amplification, and then sends the amplified signal to the sixth antenna module 16 for transmission through the first receiving end, or sends the amplified signal to the fifth antenna module 15 for transmission through the second receiving end.

[0129] In the first receiving path, after the fifth antenna module 15 receives the radio frequency signal, it divides the radio frequency signal into an ultra-high frequency signal and a low, medium, and high frequency signal. The low, medium, and high frequency signal is sent to the first end of the fifth power amplifier module 17 through the third switching module 21 through the first signal end. The fifth power amplifier module 17 can process the signals in both the transmission path and the receiving path simultaneously. In the receiving path, the low, medium, and high frequency signal is sent to the third noise amplification module 19 for reception and amplification through the filtering end of the fifth power amplifier module 17, and is sent to the first receiving end of the transceiver control module 1 through the sending end of the third noise amplification module 19. The low, medium, and high frequency signal can also be sent to the fourth end of the fourth switching module 22 through the third end of the third switching module 21, so as to be input to the fourth noise amplification module 20 for reception and amplification, and then is sent to the second receiving end of the transceiver control module 1 through the sending end of the fourth noise amplification module 20. The ultra-high frequency signal is input to the first receiving end of the sixth power amplifier module 18 through the second signal end of the fifth antenna module 15 for power amplification, and then is sent to the third receiving end of the transceiver control module 1 through the sending end of the sixth power amplifier module 18.

[0130] In the second receiving path, after the sixth antenna module 16 receives a radio frequency signal, the radio frequency signal is divided into a super high frequency signal and a low, medium and high frequency signal. The low, medium and high frequency signal is sent from the first signal terminal to the first end of the fourth switching module 22, and then sent from the second end of the fourth switching module 22 to the receiving end of the fourth noise amplification module 20. After the fourth noise amplification module 20 receives and amplifies the low, medium and high frequency signal, it is sent to the second receiving end of the transceiver control module 1 via the sending end. The low, medium and high frequency signal can also be sent from the first signal terminal to the fourth end of the fourth switching module 22, and sent from the fourth end of the fourth switching module 22 to the third end of the third switching module 21, and then sent from the fourth end of the third switching module 21 to the first end of the fifth power amplifier module 17. The low, medium and high frequency signal is sent to the third noise amplification module 19 through the filtering end of the fifth power amplifier module 17 for reception and amplification, and sent to the first receiving end of the transceiver control module 1 through the sending end of the third noise amplification module 19. The super high frequency signal is output through the second signal terminal to the second receiving end of the sixth power amplifier module 18, and after being received and amplified by the sixth power amplifier module 18, it is sent to the third receiving end of the transceiver control module 1 through the sending end.

[0131] In this embodiment, a low-cost, small-sized and fully functional discrete radio frequency front-end circuit is formed by the above 2×2 antenna structure.

[0132] Next, refer to Figure 4 to introduce the structures of the above-mentioned multiple power amplifier modules. Figure 4 FIG. is a schematic structural diagram of a power amplifier module provided by an embodiment of the present application.

[0133] One of the multiple power amplifier modules includes: a first power amplifier unit 401, a second power amplifier unit 402 and a duplex filtering unit 403.

[0134] Among them, the high-frequency receiving end of the first power amplifier unit 401 is connected to the high-frequency sending end of the transceiver control module 1, and the sending end of the first power amplifier unit 401 is connected to the first end of the duplex filtering unit 403. The second end of the duplex filtering unit 403 is connected to the first receiving end of the second power amplifier unit 402, and the third end of the duplex filtering unit 403 is connected to the first receiving end of one of the noise amplifier modules in the multiple noise amplification modules. The low-frequency receiving end of the second power amplifier unit 402 is connected to the low-frequency sending end of the transceiver control module 1, and the first sending end of the second power amplifier unit 402 is connected to the first receiving end of one of the switching modules in the multiple switching modules.

[0135] Specifically, the first power amplifier unit 401 is used to amplify the power of signals in 3G, 4G and 5G except for the N77, N78 and N79 frequency bands.

[0136] The second power amplifier unit 402 can be used for amplifying signals in the 2G frequency band and for switching functions. Among them, the switching is used to connect radio frequency signals in each frequency band and switch the above signals to the same output port for transmission. The output port of the second power amplifier unit 402 is the first transmitting end, and the switched signal is sent to the fourth receiving end of the first switching module 12.

[0137] The duplex filtering unit 403 can utilize the frequency division function of the high-pass, low-pass or band-pass filter therein, so that the path between the second end of the duplex filtering unit 403 and the first receiving end of the second power amplifier unit 402 can realize the reception and transmission of signals with different frequencies. It is worth mentioning that the duplex filter can filter the signals of the transmitting path and the receiving path at the same time.

[0138] In this embodiment, through the power amplification of the corresponding signals by the first power amplifier unit and the second power amplifier unit, and the duplex filtering of the duplex filter, the discrete radio frequency front-end circuit can transmit and receive signals in 2G, 3G, 4G and 5G except for the N77, N78 and N79 frequency bands.

[0139] As an optional implementation manner, the second power amplifier unit 402 includes a low-frequency amplification subunit 4021, a first switching subunit 4022, a second switching subunit 4023 and a combining subunit 4024. Figure 5 It is a schematic structural diagram of a second power amplifier unit 402 provided by an embodiment of the present application. Next, refer to Figure 5 to introduce the connection relationship of each subunit in the second power amplifier unit 402.

[0140] The first end of the low-frequency amplification subunit 4021 is connected to the low-frequency transmitting end of the transceiver control module 1, the second end of the low-frequency amplification subunit 4021 is connected to the first end of the first switching subunit 4022, and the third end of the low-frequency amplification subunit 4021 is connected to the first end of the second switching subunit 4023. The second end of the first switching subunit 4022 is connected to the second end of the duplex filtering unit 403, and the third end of the first switching subunit 4022 is connected to the first end of the combining subunit 4024. The second end of the second switching subunit 4023 is connected to the second end of the duplex filtering unit 403, and the third end of the second switching subunit 4023 is connected to the second end of the combining subunit 4024. The third end of the combining subunit 4024 is connected to the first receiving end of one of the plurality of switching modules.

[0141] Specifically, the low-frequency amplification subunit 4021 can amplify the received signal. Exemplarily, it can amplify the signal in the LMB frequency band sent by the transceiver control module 1. If amplifying the LMB frequency band signal, the low-frequency amplification subunit 4021 can include two power amplifiers (PAs) to amplify the signals in the low-frequency band and the intermediate-frequency band respectively, and the amplified signals are connected to the first switch subunit 4022 and the second switch subunit 4023 respectively.

[0142] Among them, in addition to the signal amplified by the low-frequency amplification subunit 4021, the first switch subunit 4022 also accesses a part of the signal sent from the second end of the duplex filtering unit 403. As an optional implementation manner, it can also access the signal sent from the transmitting end of the first power amplifier unit 401. Exemplarily, the first switch subunit 4022 can access the signals in the B7 frequency band, B3 frequency band, and B1 frequency band sent from the second end of the duplex filtering unit 403, and access the signals in the B41 frequency band and B40 frequency band sent from the transmitting end of the first power amplifier unit 401. As an optional implementation manner, the above-mentioned signals in the B41 frequency band, B40 frequency band, B7 frequency band, B3 frequency band, and B1 frequency band can each occupy a signal line.

[0143] In addition to the signal amplified by the low-frequency amplification subunit 4021, the second switch subunit 4023 also accesses a part of the signal sent from the second end of the duplex filtering unit 403. As an optional implementation manner, it can also access the signal sent from the transmitting end of the first power amplifier unit 401. Exemplarily, the first switch subunit 4022 can access the signals in the B28 frequency band, B20 frequency band, B5 frequency band, and B8 frequency band sent from the second end of the duplex filtering unit 403, and access the signals in the B34 frequency band and B39 frequency band sent from the transmitting end of the first power amplifier unit 401. As an optional implementation manner, the above-mentioned signals in the B28 frequency band, B20 frequency band, B5 frequency band, B8 frequency band, B34 frequency band, and B39 frequency band each occupy a signal line.

[0144] The first switch subunit 4022 and the second switch subunit 4023 respectively select a signal in one frequency band from the accessed signals for switching. Since the first switch subunit 4022 accesses the medium-high frequency band signals and the second switch subunit 4023 accesses the low-frequency band signals, the first switch subunit 4022 can output a medium-high frequency band signal to the first end of the combining subunit 4024, and the second switch subunit 4023 can output a low-frequency band signal to the second end of the combining subunit 4024.

[0145] The combining sub-unit 4024 combines the medium and high frequency signals and the signals in the low frequency band, enabling the two signals to be transmitted simultaneously, so that the bandwidths of the signals of multiple sub-carriers are combined to obtain a higher data throughput rate, thus realizing various CA combinations.

[0146] In this embodiment, two signal paths are simultaneously turned on by two switching sub-units in the second power amplifier unit to realize various CA combinations.

[0147] In Figure 2 Based on the 4×4 antenna structure, as an optional implementation manner, the discrete RF front-end circuit further includes an RF switch module 14. Figure 6 FIG. is a schematic structural diagram of an RF switch module 14 provided by an embodiment of the present application. Next, the structure of the RF switch module 14 will be introduced through Figure 6 introduce the structure of the RF switch module 14.

[0148] Optionally, the RF switch module 14 includes: a combining unit 610, a first switching unit 611, and a second switching unit 612. Exemplarily, the RF switch module 14 may be a DP10T chip of Vectronix.

[0149] The specific connection method is as follows: the first end of the combining unit 610 is connected to the second transmitting end of the second switching module 13, the second end of the combining unit 610 is connected to the first end of the first switching unit 611, and the third end of the combining unit 610 is connected to the first end of the second switching unit 612. The second end of the first switching unit 611 and the second end of the second switching unit 612 are respectively connected to the first receiving end of the second noise amplification module 11.

[0150] Among them, the combining unit 610 is configured to receive the signal sent by the second switching module 13, separate the received signal into a low frequency signal and a medium and high frequency signal, and then send the separated signals to the first switching unit 611 and the second switching unit 612 respectively.

[0151] The first switching unit 611 and the second switching unit 612 can respectively receive the low frequency signal and the medium and high frequency signal, and control any one of the received signals to be connected to realize the switching of different signal paths. Exemplarily, the first switching unit 611 and the second switching unit 612 can output signals in the B34 frequency band, B39 frequency band, B41 frequency band, B7 frequency band, B1 frequency band, B3 frequency band, B40 frequency band, B28 frequency band, B20 frequency band, B5 frequency band, and B8 frequency band, and input the signals in the above frequency bands to the first receiving end of the second noise amplification module 11 respectively. It should be understood that the signals in the above respective frequency bands can be respectively input to the respective sub-interfaces in the first receiving end of the second noise amplification module 11.

[0152] As another alternative embodiment, if the combining unit 610 can separate one signal into n signals, n switching units can be provided to respectively select and connect the n separated signals.

[0153] In this embodiment, through two switching units in the RF switch module, multiple CA combinations can be realized, improving the signal reception quality of the RF front end.

[0154] Next, on the basis of Figure 2 this, the structure of the first antenna module 2 is provided. Figure 7 FIG. is a schematic structural diagram of a first antenna module 2 provided by an embodiment of the present application. As Figure 7 shown, the first antenna module 2 includes: an antenna unit 201 and a combiner unit 202.

[0155] Among them, the first antenna module 2 includes: an antenna unit 201 and a combiner unit 202. The antenna unit 201 is connected to the first end of the combiner unit 202. The second end of the combiner unit 202 is connected to the first receiving end of the first switching module 12, and the third end of the combiner unit 202 is connected to the second end of the fourth power amplifier module 9.

[0156] Specifically, the antenna unit 201 can be used to receive or transmit RF signals. When receiving RF signals, the antenna unit 201 sends the received RF signals to the combiner unit 202, and the combiner unit 202 can separate the RF signals into two signals: ultra-high frequency signals and low, medium, and high frequency signals. Then, the ultra-high frequency signals are sent to a power amplifier module, and the low, medium, and high frequency signals are sent to a switching module.

[0157] When transmitting RF signals, the combiner unit 202 combines two signals of different frequency bands into one and sends them to the antenna unit 201 so that the antenna unit 201 transmits the combined signals.

[0158] In this embodiment, the combiner unit in the antenna module separates and combines signals of different frequency bands to respectively amplify the signals of different frequency bands.

[0159] As an alternative embodiment, the discrete RF front-end circuit may further include a power switch module. On the basis of Figure 1 this, Figure 8 FIG. is a schematic structural diagram of a power switch module 801 provided by an embodiment of the present application. Next, with reference to Figure 8 this, the structure of the power switch module 801 will be introduced.

[0160] Optionally, each receiving end of the power switch module 801 is connected to the power feedback end of one of the multiple power amplifier modules, and the sending end of the power switch module 801 is connected to the power receiving end of the transceiver control module 1.

[0161] As an optional implementation manner, taking a 4×4 antenna structure as an example, the structure of the power switch module 801 can be: the first receiving end of the power switch module 801 is connected to the power feedback end of the first power amplifier module 6, the second receiving end of the power switch module 801 is connected to the power feedback end of the third power amplifier module 8, the third receiving end of the power switch module 801 is connected to the power feedback end of the fourth power amplifier module 9, and the fourth receiving end of the power switch module 801 is connected to the power feedback end of the second power amplifier module 7. The first sending end of the power switch module 801 is connected to the first power receiving end of the transceiver control module 1, and the second sending end of the power switch module 801 is connected to the second power receiving end of the transceiver control module 1.

[0162] Among them, the power switch module 801 can be a double-pole four-throw switch, which respectively accesses the power feedback signals of the first power amplifier module 6, the second power amplifier module 7, the third power amplifier module 8, and the fourth power amplifier module 9, and sends the power feedback signals of the above two power amplifier modules to the power receiving end of the transceiver control module 1, so that the transceiver control module 1 can perform power control based on the power feedback signals. The reason for only sending two power feedback signals to the transceiver control module 1 is that only two power amplifier modules are working simultaneously in the discrete RF front-end circuit. One scenario is ENDC, that is, the power amplifier module connected to the LTE signal and the power amplifier module connected to the NR band are working. Another scenario is the MIMO of the transmit path. At this time, the paths connected to the N77, N78, and N79 bands are working.

[0163] In this embodiment, the power switch module receives the power feedback signals of each power amplifier module and sends them to the transceiver control module 1, so that the transceiver control module 1 can perform power control according to the power feedback signals.

[0164] As an optional implementation manner, the discrete RF front-end circuit further includes a receive switch module 14. Next, on the basis of Figure 2 the structure of the receive switch module 14 in the discrete RF front-end circuit will be introduced.

[0165] Optionally, the receiving end of the receive switch module 14 is connected to the first sending end of the second switching module 13, and the sending end of the receive switch module 14 is connected to the second receiving end of the second noise amplification module 11.

[0166] Among them, the receiving switch module 14 can be a single-pole double-throw switch. The sending end of the receiving switch module 14 is divided into a first sending end and a second sending end. The first sending end is connected to the first interface of the second receiving end of the second noise amplification module 11, and the second sending end is connected to the second interface of the second receiving end of the second noise amplification module 11. The single-pole double-throw switch is used to send one of the N41 band signal and the LTE band signal into the second noise amplification module 11 for amplification processing.

[0167] In this embodiment, ENDC is implemented through the receiving switch module, thereby forming a discrete radio frequency front-end circuit with low cost and small volume.

[0168] As an alternative embodiment, the discrete radio frequency front-end circuit further includes a filtering module.

[0169] Optionally, the first end of the filtering module is connected to one of the plurality of switching modules, and the second end of the filtering module is connected to one of the plurality of noise amplification modules.

[0170] The filtering module is used to filter the signals in the receiving and transmitting paths.

[0171] In this embodiment, the signals in the receiving and transmitting paths are processed through the filtering module, so as to extract the required specific frequency signals.

[0172] The embodiment of the present application also provides a terminal, which includes the discrete radio frequency front-end circuit as described above.

[0173] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application.

Claims

1. A discrete radio frequency front-end circuit, characterized in that, The discrete radio frequency front-end circuit includes: a transceiver control module, a plurality of power amplifier modules, a plurality of noise amplification modules, a plurality of switching modules, and a plurality of antenna modules; One end of each of the power amplifier modules and each of the noise amplification modules is connected to the transceiver control module; At least one of the plurality of power amplifier modules is connected to one of the switching modules, and each of the switching modules is respectively connected to at least one of the antenna modules, and the power amplifier modules not connected to the switching modules are connected to each other; The plurality of switching modules are further connected to the noise amplification modules; The switching module is used to switch the corresponding paths of each of the antenna modules and implement the antenna polling function; The discrete radio frequency front-end circuit sequentially sends the received and amplified radio frequency signals to the transceiver control module through the antenna module, the switching module, the noise amplification module, and the power amplifier module, and sequentially transmits the radio frequency signals output by the transceiver control module through the power amplifier module, the switching module, and the antenna module.

2. The discrete radio frequency front-end circuit according to claim 1, characterized in that, The number of the antenna modules and the power amplifier modules is 4, and the number of the noise amplification modules and the switching modules is 2.

3. The discrete radio frequency front-end circuit according to claim 2, wherein The plurality of antenna modules include: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module; the plurality of power amplifier modules include: a first power amplifier module, a second power amplifier module, a third power amplifier module, and a fourth power amplifier module; the plurality of noise amplification modules include: a first noise amplification module and a second noise amplification module; the plurality of switching modules include: a first switching module and a second switching module; the discrete radio frequency front-end circuit further includes: a switch module; The first signal end of the first antenna module is connected to the first receiving end of the first switching module; The second receiving end of the first switching module is connected to the first receiving end of the second switching module, the third receiving end of the first switching module is connected to the first signal end of the third antenna module, the first sending end of the first switching module is connected to the second receiving end of the second switching module, the fourth receiving end of the first switching module is connected to the first sending end of the first power amplifier module, and the second sending end of the first switching module is connected to the first end of the switch module; The second end of the switch module is connected to the second receiving end of the first noise amplification module, and the third end of the switch module is connected to the first end of the third power amplifier module; The high-frequency receiving end of the first power amplifier module is connected to the high-frequency sending end of the transceiver control module, the low-frequency receiving end of the first power amplifier module is connected to the low-frequency sending end of the transceiver control module, and the filtering end of the first power amplifier module is connected to the first receiving end of the first noise amplification module; The third receiving end of the first noise amplification module is connected to the second end of the third power amplifier module, and the sending end of the first noise amplification module is connected to the first receiving end of the transceiver control module; The third end of the third power amplifier module is connected to the first sending end of the transceiver control module; The second signal end of the third antenna module is connected to the first end of the second power amplifier module; The second end of the second power amplifier module is connected to the second signal end of the fourth antenna module, the third end of the second power amplifier module is connected to the third end of the fourth power amplifier module, the receiving end of the second power amplifier module is connected to the second transmitting end of the transceiver control module, and the transmitting end of the second power amplifier module is connected to the second receiving end of the transceiver control module; The first signal end of the second antenna module is connected to the third receiving end of the second switching module; The fourth receiving end of the second switching module is connected to the first signal end of the fourth antenna module, the first transmitting end of the second switching module is connected to the second receiving end of the second noise amplifier module, and the second transmitting end of the second switching module is connected to the first receiving end of the second noise amplifier module; The transmitting end of the second noise amplifier module is connected to the third receiving end of the transceiver control module; The first end of the fourth power amplifier module is connected to the second signal end of the second antenna module, the second end of the fourth power amplifier module is connected to the second signal end of the first antenna module, the receiving end of the fourth power amplifier module is connected to the third transmitting end of the transceiver control module, and the transmitting end of the fourth power amplifier module is connected to the fourth receiving end of the transceiver control module.

4. The discrete radio frequency front-end circuit according to claim 1, wherein The number of the antenna module, the power amplifier module, the noise amplifier module, and the switching module is 2 each.

5. The discrete radio frequency front-end circuit according to claim 4, wherein The multiple antenna modules include: a fifth antenna module and a sixth antenna module; the multiple power amplifier modules include: a fifth power amplifier module and a sixth power amplifier module; the multiple noise amplifier modules include: a third noise amplifier module and a fourth noise amplifier module; the multiple switching modules include: a third switching module and a fourth switching module; The first signal end of the fifth antenna module is connected to the first end of the third switching module, and the second signal end of the fifth antenna module is connected to the first receiving end of the sixth power amplifier module; The second end of the third switching module is connected to the third end of the fourth switching module, the third end of the third switching module is connected to the fourth end of the fourth switching module, and the fourth end of the third switching module is connected to the first end of the fifth power amplifier module; The high-frequency receiving end of the fifth power amplifier module is connected to the high-frequency transmitting end of the transceiver control module, the low-frequency receiving end of the fifth power amplifier module is connected to the low-frequency receiving end of the transceiver control module, and the filtering end of the fifth power amplifier module is connected to the receiving end of the third noise amplifier module; The transmitting end of the third noise amplifier module is connected to the first receiving end of the transceiver control module; The first signal end of the sixth antenna module is connected to the first end of the fourth switching module, and the second signal end of the sixth antenna module is connected to the second receiving end of the sixth power amplifier module; The second end of the fourth switching module is connected to the receiving end of the fourth noise amplifier module; The transmitting end of the fourth noise amplifier module is connected to the second receiving end of the transceiver control module; The third receiving end of the sixth power amplifier module is connected to the transmitting end of the transceiver control module, and the transmitting end of the sixth power amplifier module is connected to the third receiving end of the transceiver control module.

6. The discrete radio frequency front-end circuit according to claim 1, wherein One of the multiple power amplifier modules includes: a first power amplifier unit, a second power amplifier unit, and a duplex filtering unit; The high-frequency receiving end of the first power amplifier unit is connected to the high-frequency transmitting end of the transceiver control module, and the transmitting end of the first power amplifier unit is connected to the first end of the duplex filtering unit; The second end of the duplex filtering unit is connected to the first receiving end of the second power amplifier unit, and the third end of the duplex filtering unit is connected to the first receiving end of one of the multiple noise amplifier modules; The low-frequency receiving end of the second power amplifier unit is connected to the low-frequency transmitting end of the transceiver control module, and the first transmitting end of the second power amplifier unit is connected to the first receiving end of one of the multiple switching modules.

7. The discrete radio frequency front-end circuit according to claim 6, characterized in that, The second power amplifier unit includes a low-frequency amplification sub-unit, a first switching sub-unit, a second switching sub-unit, and a combining sub-unit, where: The first end of the low-frequency amplification sub-unit is connected to the low-frequency transmitting end of the transceiver control module, the second end of the low-frequency amplification sub-unit is connected to the first end of the first switching sub-unit, and the third end of the low-frequency amplification sub-unit is connected to the first end of the second switching sub-unit; The second end of the first switching sub-unit is connected to the second end of the duplex filtering unit, and the third end of the first switching sub-unit is connected to the first end of the combining sub-unit; The second end of the second switching sub-unit is connected to the second end of the duplex filtering unit, and the third end of the second switching sub-unit is connected to the second end of the combining sub-unit; The third end of the combining sub-unit is connected to the first receiving end of one of the multiple switching modules.

8. The discrete radio frequency front-end circuit according to claim 3, characterized in that, The discrete radio frequency front-end circuit further includes: a radio frequency switch module; the radio frequency switch module includes: a combining unit, a first switching unit, and a second switching unit, where: The first end of the combining unit is connected to the second transmitting end of the second switching module, the second end of the combining unit is connected to the first end of the first switching unit, and the third end of the combining unit is connected to the first end of the second switching unit; The second end of the first switching unit and the second end of the second switching unit are respectively connected to the first receiving end of the second noise amplification module.

9. The discrete radio frequency front-end circuit according to claim 3, characterized in that The first antenna module includes: an antenna unit and a combiner unit; The antenna unit is connected to the first end of the combiner unit; The second end of the combiner unit is connected to the first receiving end of the first switching module, and the third end of the combiner unit is connected to the second end of the fourth power amplifier module.

10. The discrete radio frequency front-end circuit according to claim 1, characterized in that, The discrete radio frequency front-end circuit further includes: a power switch module; Each receiving end of the power switch module is connected to the power feedback end of one of the multiple power amplifier modules, and the transmitting end of the power switch module is connected to the power receiving end of the transceiver control module.

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