Radio frequency front-end circuit, radio frequency transceiving device and electronic equipment

Abstract

The embodiment of the invention provides a radio frequency front-end circuit, a radio frequency transceiving device and electronic equipment. The radio frequency front-end circuit comprises a receiver, a power supply, three change-over switches and a PA; the power supply is provided with a connecting pin and three ports, and the connecting pin is electrically connected to the receiver; each change-over switch is provided with a common end and two connecting ends, and the common end is electrically connected to a port of a power supply; the two PAs supporting the first frequency band are electrically connected to the connecting ends of different change-over switches; the two PAs supporting the second frequency band are electrically connected to the connecting ends of different change-over switches; the two PAs supporting the third frequency band are electrically connected to the connecting ends of different change-over switches; the radio frequency front-end circuit supports switching of a first communication mode and a second communication mode of three-path emission; the first communication mode supports FDD (2T) + TDD (1T); the second communication mode supports FDD (1T) + TDD (2T). The radio frequency front-end circuit can meet the requirement of three-path emission, and the number of power supplies is saved.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a radio frequency front-end circuit, a radio frequency transceiver device, and an electronic device. Background Art

[0002] With the development of technologies, the popularity of electronic devices with communication functions such as mobile phones is getting higher and higher, and the functions are getting more and more powerful. An electronic device usually includes a radio frequency transceiver device to implement the communication function of the electronic device. However, the cost of the radio frequency transceiver device in related technologies is relatively high. Summary of the Invention

[0003] In a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, and the radio frequency front-end circuit includes:

[0004] A receiver, configured to transmit signals in a first frequency band, a second frequency band, and a third frequency band;

[0005] A power supply, the power supply having a connection pin and three ports, and the connection pin being electrically connected to the receiver;

[0006] Three switching switches, each switching switch having a common terminal and two connection terminals, each common terminal being electrically connected to a port of the power supply, and different common terminals being electrically connected to different ports;

[0007] Two PAs supporting first-frequency-band transmission, and the two PAs supporting the first frequency band are electrically connected to connection terminals of different switching switches;

[0008] Two PAs supporting second-frequency-band transmission, and the two PAs supporting the second frequency band are electrically connected to connection terminals of different switching switches;

[0009] Two PAs supporting third-frequency-band transmission, and the two PAs supporting the third frequency band are electrically connected to connection terminals of different switching switches;

[0010] The radio frequency front-end circuit supports the switching between a first communication mode with three-way transmission and a second communication mode with three-way transmission; wherein, the first communication mode supports two-way FDD transmission of one or two of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other; the second communication mode supports one-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmission of the other or the other two.

[0011] In a second aspect, an embodiment of the present application provides a radio frequency transceiver device, and the radio frequency transceiver device includes:

[0012] The radio frequency front-end circuit as described in the first aspect; and

[0013] A first radiator supporting first frequency band transmission, the first radiator being electrically connected to one of two PAs supporting the first frequency band;

[0014] A second radiator supporting first frequency band transmission, the second radiator being electrically connected to the other of two PAs supporting the first frequency band;

[0015] A third radiator supporting second frequency band transmission, the third radiator being electrically connected to one of two PAs supporting the second frequency band;

[0016] A fourth radiator supporting second frequency band transmission, the fourth radiator being electrically connected to the other of two PAs supporting the second frequency band;

[0017] A fifth radiator supporting third frequency band transmission, the fifth radiator being electrically connected to one of two PAs supporting the third frequency band; and

[0018] A sixth radiator supporting third frequency band transmission, the sixth radiator being electrically connected to the other of two PAs supporting the third frequency band.

[0019] In a third aspect, an embodiment of the present application provides an electronic device, the electronic device including the radio frequency transceiver device as described in the second aspect.

[0020] In summary, the radio frequency front-end circuit provided by the embodiment of the present application uses one power supply, three switching switches, two PAs supporting first frequency band transmission, two PAs supporting second frequency band transmission, and two PAs supporting third frequency band transmission. By configuring the connection relationships among the power supply, the three switching switches, the two PAs supporting first frequency band transmission, the two PAs supporting second frequency band transmission, and the two PAs supporting third frequency band transmission, the radio frequency front-end circuit can support a first communication mode or a second communication mode, and can implement the switching between the first communication mode and the second communication mode. Therefore, the radio frequency front-end circuit can meet the working requirements of FDD transmission and TDD transmission (i.e., FDD+TDD) in the case of three-way transmission (3TX). In addition, when the first communication mode and the second communication mode include FDD transmission, the uplink coverage and rate enhancement of signals in the corresponding frequency bands can be achieved by using FDD transmission, so that better communication performance is obtained. Further, the radio frequency front-end circuit provided by the embodiment of the present application saves the number of power supplies by configuring the connection relationships among the power supply, the three switching switches, the two PAs supporting first frequency band transmission, the two PAs supporting second frequency band transmission, and the two PAs supporting third frequency band transmission. Therefore, the cost of the radio frequency front-end circuit is saved and the area of the circuit board occupied when the radio frequency front-end circuit is applied to an electronic device is saved. Furthermore, the size of the main board is small, which is beneficial to the miniaturization of the main board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of a radio frequency front-end circuit provided in the related art;

[0023] Figure 2 It is a schematic diagram of a typical three-way transmit wheel switching mechanism;

[0024] Figure 3 It is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0025] Figure 4 For an embodiment Figure 3 It is a circuit block diagram of a radio frequency transceiver device in the electronic device shown in the embodiment;

[0026] Figure 5 For another embodiment Figure 3 It is a circuit block diagram of a radio frequency transceiver device in the electronic device shown in the embodiment;

[0027] Figure 6 For Figure 4 It is a schematic diagram of a radio frequency front-end circuit in the radio frequency transceiver device shown in the figure;

[0028] Figure 7 For Figure 6 It is a circuit schematic diagram when the radio frequency front-end circuit shown supports the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band;

[0029] Figure 8 For Figure 7 It is a schematic diagram of the connection of each port of the power supply to each PA in the figure;

[0030] Figure 9 For Figure 7 It is a truth table of the connection states of each switching switch in the radio frequency front-end circuit shown in the figure;

[0031] Figure 10 It is a schematic diagram of the third PA provided in an embodiment;

[0032] Figure 11 It is a schematic diagram of the fourth PA provided in an embodiment;

[0033] Figure 12 For Figure 7Schematic diagram of the radio frequency front-end circuit in supporting one-way FDD transmission in the first frequency band and TDD transmission in the third frequency band for the second communication mode;

[0034] Figure 13 is Figure 5 Schematic diagram of the radio frequency front-end circuit in the radio frequency transceiver device shown in ;

[0035] Figure 14 is Figure 13 Schematic diagram of the radio frequency front-end circuit shown in when supporting the first communication mode with two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band;

[0036] Figure 15 is Figure 13 Schematic diagram of the connection of each port of the power supply in to each PA;

[0037] Figure 16 is Figure 13 Truth table of the connection status of each switching switch in the radio frequency front-end circuit shown in ;

[0038] Figure 17 is Figure 13 Schematic diagram of the radio frequency front-end circuit in supporting one-way FDD transmission in the first frequency band and TDD transmission in the third frequency band for the second communication mode;

[0039] Figure 18 Schematic diagram of the radio frequency front-end circuit provided by another embodiment of the present application;

[0040] Figure 19 Schematic diagram of the radio frequency front-end circuit provided by yet another embodiment of the present application;

[0041] Figure 20 is Figure 18 or Figure 19 Schematic diagram of the power switch integrated module in .

[0042] Description of main component numbers

[0043] Electronic device 1, base station 3;

[0044] Radio frequency transceiver device 10, middle frame 30, display screen 50, rear cover 60;

[0045] First radiator 110, second radiator 120, third radiator 130, fourth radiator 140, fifth radiator 150, sixth radiator 160, radio frequency front-end circuit 170;

[0046] Receiver 171, power supply 172, connection pin 1721, first port 1722a, second port 1722b, third port 1722c;

[0047] The first switching switch 173, the first common terminal 173a, the first connection terminal 173b, and the second connection terminal 173c;

[0048] The second switching switch 174, the second common terminal 174a, the third connection terminal 174b, and the fourth connection terminal 174c;

[0049] The third switching switch 175, the third common terminal 175a, the fifth connection terminal 175b, and the sixth connection terminal 175c;

[0050] The first PA 181, the second PA 182, the third PA 183, the fourth PA 184, the fifth PA 185, and the sixth PA 186;

[0051] The power switch integrated module 200. Specific implementation manners

[0052] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without creative efforts belong to the protection scope of the present application.

[0053] In the present application, referring to "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The phrase appears at various positions in the specification does not necessarily refer to the same embodiment, nor is it an exclusive, independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0054] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example: a component or device including one or more components is not limited to the one or more components listed, but optionally further includes one or more components not listed but inherent in the product shown, or one or more components that should be possessed based on the described function.

[0055] Before introducing the radio frequency front-end circuit 170 provided in the embodiment of the present application, the radio frequency front-end circuit 170 in the related art before the improvement of the radio frequency front-end circuit 170 provided in the embodiment of the present application will be introduced. It can be understood that the radio frequency front-end circuit 170 in the related art should not be understood as the radio frequency front-end circuit 170 in the prior art.

[0056] Please refer to Figure 1 , Figure 1 which is a schematic diagram of a radio frequency front-end circuit provided in the related art. The radio frequency front-end circuit 170 in the related art includes a receiver 171, a first power supply 172a, a second power supply 172b, a first PA 181 supporting transmission in the first frequency band, a second PA 182 supporting transmission in the first frequency band, a third PA 183 supporting transmission in the second frequency band, a fourth PA 184 supporting transmission in the second frequency band, a fifth PA 185 supporting transmission in the third frequency band, and a sixth PA 186 supporting transmission in the third frequency band. The first power supply 172a has a first connection pin 1721a and three ports. The first connection pin 1721a of the first power supply 172a is electrically connected to the receiver 171, and the three ports of the first power supply 172a are respectively connected to the first PA 181, the third PA 183, and the fifth PA 185. The second power supply 172b has a second connection pin 1721b and three ports. The second connection pin 1721b of the second power supply 172b is electrically connected to the receiver 171, and the three ports of the second power supply 172b are respectively connected to the second PA 182, the fourth PA 184, and the sixth PA 186. The radio frequency front-end circuit 170 in the related art can support three-way transmission (3TX).

[0057] It can be seen that the radio frequency front-end circuit 170 in the related art includes two independent power supply chips, namely the first power supply 172a and the second power supply 172b. Therefore, the cost is relatively high. In addition, when the radio frequency front-end circuit 170 is applied to the electronic device 1, the first power supply 172a and the second power supply 172b in the radio frequency front-end circuit 170 occupy a relatively large area of the main board of the electronic device 1, thereby making the size of the main board relatively large, which is not conducive to the miniaturization of the main board.

[0058] Next, a radio frequency front-end circuit 170, a radio frequency transceiver device 10, and an electronic device 1 provided by an embodiment of the present application will be introduced in detail.

[0059] An embodiment of the present application provides an electronic device 1. The electronic device 1 includes, but is not limited to, devices capable of emitting electromagnetic wave signals such as mobile phones, telephones, televisions, tablet computers (Pads), personal computers, laptop computers (Personal Computers, PCs), vehicle-mounted devices, earphones, watches, wearable devices, etc. The electronic device 1 can be a foldable device or a non-foldable device. Whether the electronic device 1 in the present application is foldable is not limited. In the schematic diagram of the embodiment of the present application, the electronic device 1 is taken as an example of a mobile phone for illustration. It can be understood that it should not be construed as a limitation on the electronic device 1 provided by the embodiment of the present application. The electronic device 1 provided by the embodiment of the present application will be introduced.

[0060] With the development of communication networks, technology has been continuously evolving and advancing. Uplink (also known as transmission TX) has always been an important experience indicator that users focus on, and it has also been a key technical point for research and development. Three-way transmission (3TX), as a key technology for standard promotion, has also been a hot topic in recent research and development.

[0061] Generally speaking, three-way transmission (3TX) mainly appears in the scenarios of 4G and 5G dual connectivity (E-UTRAN New Radio Dual Connectivity, ENDC), or carrier aggregation (CA). The main combination forms of three-way transmission are frequency division duplexing (FDD) and time division duplexing (TDD), that is, FDD + TDD. For example, three-way transmission can be the non-standalone (NSA) of 5G in ENDC. Generally, FDD is mainly concentrated in the low-frequency band (i.e., LB band) and the mid-frequency band (i.e., MB band), and FDD has a wider and farther coverage. TDD is usually applicable to the ultra-high-frequency band (i.e., UHB band), and TDD has the advantage of large bandwidth. The uplink coverage of TDD is relatively weaker than that of FDD.

[0062] Please refer to Figure 2 , Figure 2 which is a schematic diagram of a typical three-way transmission switching mechanism. When the radio frequency front-end circuit 170 supports three-way transmission (3TX), it has a first communication mode and a second communication mode. The first communication mode includes two-way FDD transmission and one-way TDD transmission (abbreviated as FDD(2T)+TDD(1T)). The second communication mode includes one-way FDD transmission and two-way TDD transmission (abbreviated as FDD 1T+TDD 2T). When the radio frequency front-end circuit 170 supports the first communication mode, it simultaneously supports the signal transmission in two-way FDD form and the signal transmission in one-way TDD form. When the radio frequency front-end circuit 170 supports the second communication mode, it simultaneously supports the signal transmission in one-way FDD form and the signal transmission in two-way TDD form. When the radio frequency front-end circuit 170 supports the first communication mode, it has two FDD-form transmission channels and one TDD-form transmission channel. When the radio frequency front-end circuit 170 supports the second communication mode, it has one FDD-form transmission channel and two TDD-form transmission channels.

[0063] When the radio frequency front - end circuit 170 communicates with the base station 3, it can adopt the first communication mode or the second communication mode. Whether the radio frequency front - end circuit 170 and the base station 3 adopt the first communication mode or the second communication mode is usually determined by the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3. This will be described in detail later. It should be noted that when the radio frequency front - end circuit 170 is applied to the electronic device 1, the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 can be equal to or approximately equal to the distance between the radio frequency front - end circuit 170 and the base station 3. Whether the radio frequency front - end circuit 170 and the base station 3 adopt the first communication mode or the second communication mode is usually determined by the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3; in other words, whether the radio frequency front - end circuit 170 and the base station 3 adopt the first communication mode or the second communication mode is usually determined by the distance between the radio frequency front - end circuit 170 and the base station 3.

[0064] In Figure 2 , the distances between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 are respectively marked as the first distance D1 and the second distance D2, where the first distance D1 is greater than or equal to a preset distance, and the second distance is less than the preset distance. When the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 is the first distance, the radio frequency front - end circuit 170 supports the first communication mode with three - way transmission; when the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 is the second distance, the radio frequency front - end circuit 170 supports the second communication mode with three - way transmission.

[0065] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 which are schematic diagrams of an electronic device provided by an embodiment of the present application; Figure 4 is a circuit block diagram of a radio frequency transceiver device in the electronic device shown in an embodiment Figure 3 ; Figure 5 is another embodiment Figure 3Circuit block diagram of the radio frequency transceiver device in the electronic device shown. The electronic device 1 includes a radio frequency transceiver device 10. In addition, in one embodiment, the electronic device 1 further includes a middle frame 30, a display screen 50 and a rear cover 60. The display screen 50 is disposed on one side of the middle frame 30. The display screen 50 is a component for implementing the display function in the electronic device 1. The display screen 50 may be, but is not limited to, a screen with a touch function or a screen without a touch function, and the present application does not make a limitation thereto. The rear cover 60 is disposed on the other side of the middle frame 30. In other words, the rear cover 60 and the display screen 50 are respectively disposed on two opposite sides of the middle frame 30. When the electronic device 1 further includes a battery, the rear cover 60 is also referred to as a battery cover. The material of the rear cover 60 may be metal or non-metal, and is not limited in this embodiment.

[0066] It can be understood that the introduction of the electronic device 1 provided in the embodiment of the present application is only an introduction to an application environment of the radio frequency transceiver device 10. It should not be construed as a limitation to the radio frequency transceiver device 10 provided in the embodiment of the present application. Next, a detailed introduction to the radio frequency transceiver device 10 provided in the embodiment of the present application will be given.

[0067] The radio frequency transceiver device 10 includes a radio frequency front-end circuit 170, a first radiator 110 supporting first-band transmission, a second radiator 120 supporting first-band transmission, a third radiator 130 supporting second-band transmission, a fourth radiator 140 supporting second-band transmission, a fifth radiator 150 supporting third-band transmission, and a sixth radiator 160 supporting third-band transmission.

[0068] The first radiator 110 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a PrintDirect Structuring (PDS) radiator, or a metal stub radiator. When the radio frequency transceiver device 10 is applied to the electronic device 1, the first radiator 110 may be a Mechanical Design Antenna (MDA) radiator using the metal-inlay design of the electronic device 1 itself. For example, the first radiator 110 may be an antenna radiator designed using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the first radiator 110 may also be a metal frame radiator designed from the metal middle frame 30. When the first radiator 110 receives the radio frequency signal of the first band sent by the radio frequency front-end circuit 170, the first radiator 110 emits an electromagnetic wave signal of the first band according to the radio frequency signal of the first band.

[0069] The second radiator 120 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal stub radiator. When the radio frequency transceiver device 10 is applied to the electronic device 1, the second radiator 120 may be a Mechanical Design Antenna (MDA) radiator designed by using the metal insert of the electronic device 1 itself. For example, the second radiator 120 may be an antenna radiator designed by using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the second radiator 120 may also be a metal frame radiator designed by the metal middle frame 30. When the second radiator 120 receives the radio frequency signal in the first frequency band sent by the radio frequency front-end circuit 170, the second radiator 120 emits an electromagnetic wave signal in the first frequency band according to the radio frequency signal in the first frequency band.

[0070] The third radiator 130 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal stub radiator. When the radio frequency transceiver device 10 is applied to the electronic device 1, the third radiator 130 may be a Mechanical Design Antenna (MDA) radiator designed by using the metal insert of the electronic device 1 itself. For example, the third radiator 130 may be an antenna radiator designed by using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the third radiator 130 may also be a metal frame radiator designed by the metal middle frame 30. When the third radiator 130 receives the radio frequency signal in the second frequency band sent by the radio frequency front-end circuit 170, the third radiator 130 emits an electromagnetic wave signal in the second frequency band according to the radio frequency signal in the second frequency band.

[0071] The fourth radiator 140 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal stub radiator. When the RF transceiver device 10 is applied to the electronic device 1, the fourth radiator 140 may be a Mechanical Design Antenna (MDA) radiator designed by using the metal insert of the electronic device 1 itself. For example, the fourth radiator 140 may be an antenna radiator designed by using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the fourth radiator 140 may also be a metal frame radiator designed by the metal middle frame 30. When the fourth radiator 140 receives the RF signal in the second frequency band sent by the RF front-end circuit 170, the fourth radiator 140 emits an electromagnetic wave signal in the second frequency band according to the RF signal in the second frequency band.

[0072] The fifth radiator 150 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal stub radiator. When the RF transceiver device 10 is applied to the electronic device 1, the fifth radiator 150 may be a Mechanical Design Antenna (MDA) radiator designed by using the metal insert of the electronic device 1 itself. For example, the fifth radiator 150 may be an antenna radiator designed by using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the fifth radiator 150 may also be a metal frame radiator designed by the metal middle frame 30. When the fifth radiator 150 receives the RF signal in the third frequency band sent by the RF front-end circuit 170, the fifth radiator 150 emits an electromagnetic wave signal in the third frequency band according to the RF signal in the third frequency band.

[0073] The sixth radiator 160 may be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal stub radiator. When the RF transceiver device 10 is applied to the electronic device 1, the sixth radiator 160 may be a Mechanical Design Antenna (MDA) radiator designed by using the metal insert of the electronic device 1 itself. For example, the sixth radiator 160 may be an antenna radiator designed by using the middle frame 30 formed by the plastic and metal of the electronic device 1. In addition, the sixth radiator 160 may also be a metal frame radiator designed by the metal middle frame 30. When the sixth radiator 160 receives the RF signal in the third frequency band sent by the RF front-end circuit 170, the sixth radiator 160 emits an electromagnetic wave signal in the third frequency band according to the RF signal in the third frequency band.

[0074] Please refer to Figure 4 and Figure 6 , Figure 6 is Figure 4 a schematic diagram of the RF front-end circuit in the RF transceiver device shown in. The RF front-end circuit 170 includes a receiver 171, a power supply 172, three switching switches, two power amplifiers (PAs) supporting the first frequency band transmission, two PAs supporting the second frequency band transmission, and two PAs supporting the third frequency band transmission. The receiver 171 is used to transmit signals in the first frequency band, the second frequency band, and the third frequency band. The power supply 172 has a connection pin 1721 and three ports. The connection pin 1721 is electrically connected to the receiver 171. Each switching switch has a common terminal and two connection terminals. Each common terminal is electrically connected to a port of the power supply 172, and different common terminals are electrically connected to different ports. The two PAs supporting the first frequency band are electrically connected to the connection terminals of different switching switches; the two PAs supporting the second frequency band are electrically connected to the connection terminals of different switching switches; the two PAs supporting the third frequency band are electrically connected to the connection terminals of different switching switches. The RF front-end circuit 170 supports the switching between the first communication mode with three-way transmission and the second communication mode with three-way transmission. Among them, the first communication mode supports two-way FDD transmission of one or two of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other; the second communication mode supports one-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmission of the other or the other two.

[0075] In one embodiment, the receiver 171 is used to transmit signals in a first frequency band, a second frequency band, and a third frequency band. The first frequency band, the second frequency band, and the third frequency band are different. In one embodiment, the first frequency band includes a low band (LB) frequency band, the second frequency band includes a middle high band (MHB) frequency band, and the third frequency band includes an ultra high frequency (UHB) frequency band. In other embodiments, the first frequency band, the second frequency band, and the third frequency band are not limited thereto, as long as the first frequency band, the second frequency band, and the third frequency band are different.

[0076] The PA supporting the first frequency band is used to amplify the signal in the first frequency band and then output it; the PA supporting the second frequency band is used to amplify the signal in the second frequency band and then output it; the PA supporting the third frequency band is used to amplify the signal in the third frequency band and then output it.

[0077] The power supply 172 is used to provide electrical energy. When the connection pin 1721 of the power supply 172 is electrically connected to the receiver 171, the power supply 172 provides the electrical energy required for the receiver 171 to operate.

[0078] Each common terminal is electrically connected to a port of the power supply 172, and different common terminals are electrically connected to different ports. The two PAs supporting the first frequency band are electrically connected to the connection ends of different switching switches; the two PAs supporting the second frequency band are electrically connected to the connection ends of different switching switches; the two PAs supporting the third frequency band are electrically connected to the connection ends of different switching switches; therefore, when the power supply 172 is electrically connected to the PA through the switching switch, the power supply 172 provides the electrical energy required for the connected PA to operate through the switching switch. For example, when the power supply 172 is electrically connected to one of the two PAs supporting the first frequency band transmission through the switching switch, the power supply 172 supplies power to one of the two PAs supporting the first frequency band transmission through the switching switch. When the power supply 172 is electrically connected to one of the two PAs supporting the second frequency band transmission through the switching switch, the power supply 172 supplies power to one of the two PAs supporting the second frequency band transmission through the switching switch. When the power supply 172 is electrically connected to one of the two PAs supporting the third frequency band transmission through the switching switch, the power supply 172 supplies power to one of the two PAs supporting the third frequency band transmission through the switching switch.

[0079] As can be seen, the radio frequency front-end circuit 170 provided by the embodiment of the present application utilizes one power supply 172, three switching switches, two PAs supporting the first frequency band transmission, two PAs supporting the second frequency band transmission, and two PAs supporting the third frequency band transmission. By configuring the connection relationships among the power supply 172, the three switching switches, the two PAs supporting the first frequency band transmission, the two PAs supporting the second frequency band transmission, and the three PAs supporting the third frequency band transmission, the radio frequency front-end circuit 170 can implement the first communication mode supporting three-way transmission (3TX) or the second communication mode, and realize the switching between the first communication mode and the second communication mode, thereby saving the number of power supplies 172, and thus saving the cost of the radio frequency front-end circuit 170 and the area occupied by the circuit board when the radio frequency front-end circuit 170 is applied to the electronic device 1, and further making the size of the main board smaller, which is beneficial to the miniaturization of the main board.

[0080] The radio frequency front-end circuit 170 supports the switching between the first communication mode and the second communication mode. Specifically, the radio frequency front-end circuit 170 supports the first communication mode and can be switched from the first communication mode to the second communication mode; the radio frequency front-end circuit 170 supports the second communication mode and can be switched from the second communication mode to the first communication mode.

[0081] The first communication mode includes two-way FDD transmission and one-way TDD transmission, that is, FDD(2T)+TDD(1T). The second communication mode includes one-way FDD transmission and two-way TDD transmission, that is, FDD(1T)+TDD(2T).

[0082] Specifically, the first communication mode supports two-way FDD transmission of one or two of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other. Specifically, it includes: the first communication mode supports two-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other, where the other is different from the one; it may also include: the first communication mode supports one-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, one-way FDD transmission of another, and TDD transmission of the other, where the one, the another, and the other are all different. Since the first communication mode supports two-way FDD transmission and one-way TDD transmission, the first communication mode can also be simply referred to as the FDD(2T)+TDD(1T) mode.

[0083] It should be noted that when the one includes multiple operating frequency bands, and the first communication mode supports two-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other, the operating frequency bands of the two-way FDD transmission of the one may be the same or different. In other words, the first communication mode supports two-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other, including: the first communication mode supports two-way FDD transmission of the same operating frequency band of one of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other of the first frequency band, the second frequency band, and the third frequency band; it may also include the following situation, the first communication mode supports one-way FDD transmission of one operating frequency band of one of the first frequency band, the second frequency band, and the third frequency band, one-way FDD transmission of another operating frequency band of the one, and TDD transmission of the other of the first frequency band, the second frequency band, and the third frequency band, where the other operating frequency band is different from the one operating frequency band.

[0084] The second communication mode supports one-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmission of the other or the other two, specifically including: the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmission of the other, where the one is different from the other; the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, TDD transmission of another, and TDD transmission of the other, where the one, the another, and the other are all different. Since the second communication mode supports one-way FDD transmission and two-way TDD transmission, therefore, the second communication mode can also be simply referred to as the FDD(1T)+TDD(2T) mode.

[0085] In one embodiment, the radio frequency front-end circuit 170 operates in the first communication mode of three-way transmission and can be switched from the first communication mode to the second communication mode; correspondingly, the radio frequency front-end circuit 170 operates in the second communication mode of three-way transmission and can be switched from the second communication mode to the first communication mode. Therefore, it is also said that the radio frequency front-end circuit 170 can achieve round-robin switching of three-way transmission, also known as 3TX round-robin switching.

[0086] It should be noted that when the other one includes multiple operating frequency bands, the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmissions of the other one. Among them, the operating frequency bands of the two-way TDD transmissions of the other one may be the same or different. In other words, the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmissions of the other one, including: the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmissions of the same operating frequency band of the other one among the first frequency band, the second frequency band, and the third frequency band; it may also include the following situation: the second communication mode supports FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, one-way TDD transmission of one operating frequency band of the other one among the first frequency band, the second frequency band, and the third frequency band, and TDD transmission of another operating frequency band of the other one among the first frequency band, the second frequency band, and the third frequency band, where the other operating frequency band is different from the one operating frequency band.

[0087] For example, when the first frequency band includes a low-frequency band, the multiple operating frequency bands in the low-frequency band may include Band B5, Band B8, Band B20, and Band B28, etc. When the second frequency band includes a medium-high frequency band, the multiple operating frequency bands in the medium-high frequency band include Band B1, Band B3, Band B32, Band B40, and Band N41, etc. When the third frequency band includes an ultra-high frequency band, the multiple operating frequency bands in the ultra-high frequency band include Band N77, Band N78, and Band N79, etc.

[0088] As can be seen from the previous introduction, since the first communication mode supports two-way FDD transmissions and one-way TDD transmission, therefore, the first communication mode can also be simply referred to as the FDD(2T)+TDD(1T) mode. Since the second communication mode supports one-way FDD transmission and two-way TDD transmissions, therefore, the second communication mode can also be simply referred to as the FDD(1T)+TDD(2T) mode.

[0089] When the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is greater than or equal to a preset distance, the radio frequency front-end circuit 170 communicates with the base station 3 using a first communication mode. When the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is greater than or equal to the preset distance, the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is relatively far. In addition, the TDD coverage is relatively poor while the FDD coverage is relatively good. Therefore, when the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is greater than or equal to the preset distance, the radio frequency front-end circuit 170 communicates with the base station 3 using the first communication mode, which can enable the radio frequency front-end circuit 170 and the base station 3 to have better communication performance. In other words, when the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is relatively far, communicating with the base station 3 using the FDD(2T)+TDD(1T) mode can enable the radio frequency front-end circuit 170 and the base station 3 to have better communication performance.

[0090] When the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is less than the preset distance, the radio frequency front-end circuit 170 communicates with the base station 3 using a second communication mode. When the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is less than the preset distance, the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is relatively close, and the TDD coverage is relatively good. Therefore, when the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is less than the preset distance, the radio frequency front-end circuit 170 communicates with the base station 3 using the second communication mode, which can enable the radio frequency front-end circuit 170 and the base station 3 to have better communication performance. In other words, when the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is relatively close, communicating with the base station 3 using the FDD(1T)+TDD(2T) mode can enable the radio frequency front-end circuit 170 and the base station 3 to have better communication performance.

[0091] Generally speaking, the intensity of the signal received by the radio frequency front-end circuit 170 is related to the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3. Generally speaking, the farther the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3, the smaller the intensity of the signal received by the radio frequency front-end circuit 170.

[0092] In one embodiment, the receiver 171 of the radio frequency front-end circuit 170 can receive signals in a preset frequency band. When the intensity of the signals in the preset frequency band received by the receiver 171 is less than or equal to a preset intensity, it indicates that the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is greater than or equal to the preset distance; when the intensity of the signals in the preset frequency band received by the receiver 171 is greater than the preset intensity, it indicates that the distance between the electronic device 1 to which the radio frequency front-end circuit 170 is applied and the base station 3 is less than the preset distance.

[0093] The preset frequency band can be one of the first frequency band, the second frequency band, and the third frequency band, or can be other frequency bands except the first frequency band, the second frequency band, and the third frequency band.

[0094] In one embodiment, the radio frequency front-end circuit 170 can receive signals by using one of the first radiator 110, the second radiator 120, the third radiator 130, the fourth radiator 140, the fifth radiator 150, and the sixth radiator 160, and use the signals received by the one as the signals in the preset frequency band. In another embodiment, the radio frequency transceiver device 10 to which the radio frequency front-end circuit 170 is applied may further include a receiving radiator, and the receiver 171 of the radio frequency front-end circuit 170 is electrically connected to the receiving radiator, and uses the signals received by the receiving radiator as the signals in the preset frequency band.

[0095] The radio frequency front-end circuit 170 provided by the embodiment of the present application includes three-way transmission (3TX) whether in the first communication mode or the second communication mode, and is applicable to both 4G and 5G dual connectivity (E-UTRAN New Radio Dual Connectivity, ENDC), and is also applicable to carrier aggregation (Carrier Aggregation, CA).

[0096] When the radio frequency front-end circuit 170 supports ENDC, the ENDC is applicable to the first communication mode and can also be applicable to the second communication mode.

[0097] Specifically, when the radio frequency front-end circuit 170 supports the first communication mode (i.e., FDD (2T)+TDD (1T)), and the radio frequency front-end circuit 170 supports ENDC, the following situations include: the frequency band of FDD transmission in the radio frequency front-end circuit 170 is the 5G frequency band, and the frequency band of TDD transmission in the radio frequency front-end circuit 170 is the 4G frequency band; or, the frequency band of FDD transmission in the radio frequency front-end circuit 170 is the 4G frequency band, and the frequency band of TDD transmission in the radio frequency front-end circuit 170 is the 5G frequency band.

[0098] When the radio frequency front-end circuit 170 supports the second communication mode (i.e., FDD(1T)+TDD(2T)), and the radio frequency front-end circuit 170 supports ENDC, the following situations are included: the frequency band transmitted by FDD in the radio frequency front-end circuit 170 is a 5G frequency band, and the frequency band transmitted by TDD in the radio frequency front-end circuit 170 is a 4G frequency band; or, the frequency band transmitted by FDD in the radio frequency front-end circuit 170 is a 4G frequency band, and the frequency band transmitted by TDD in the radio frequency front-end circuit 170 is a 5G frequency band.

[0099] For example, when the radio frequency front-end circuit 170 supports ENDC and the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band: In one embodiment, the radio frequency front-end circuit 170 supports two-way FDD transmission in the first frequency band of 5G and TDD transmission in the third frequency band of 4G; in another embodiment, the radio frequency front-end circuit 170 supports two-way FDD transmission in the first frequency band of 4G and TDD transmission in the third frequency band of 5G.

[0100] For example, when the radio frequency front-end circuit 170 supports EDNC and the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band: In one embodiment, the radio frequency front-end circuit 170 supports one-way FDD transmission in the first frequency band of 5G and two-way TDD transmission in the third frequency band of 4G; in another embodiment, the radio frequency front-end circuit 170 supports one-way FDD transmission in the first frequency band of 4G and two-way TDD transmission in the third frequency band of 5G.

[0101] When the radio frequency front-end circuit 170 supports CA, the CA can be applicable to the first communication mode or the second communication mode.

[0102] Specifically, when the radio frequency front-end circuit 170 supports the first communication mode (i.e., FDD(2T)+TDD(1T)), and the radio frequency front-end circuit 170 supports ENDC, the frequency band of the first communication mode supported by the radio frequency front-end circuit 170 can be 4G CA or 5G CA.

[0103] When the radio frequency front-end circuit 170 supports the second communication mode (i.e., FDD(1T)+TDD(2T)), and the radio frequency front-end circuit 170 supports ENDC, the frequency band of the second communication mode supported by the radio frequency front-end circuit 170 can be 4G frequency band CA or 5G frequency band CA.

[0104] For example, when the RF front-end circuit 170 supports ENDC and the RF front-end circuit 170 supports a second communication mode with two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band: In one embodiment, the RF front-end circuit 170 supports two-way FDD transmission in the first frequency band and TDD transmission in the third frequency band, and the RF front-end circuit 170 supports CA of 5G in the first frequency band and the third frequency band; In another embodiment, the RF front-end circuit 170 supports two-way FDD transmission in the first frequency band and TDD transmission in the third frequency band, and the RF front-end circuit 170 supports CA of 4G in the first frequency band and the third frequency band. Wherein, the RF front-end circuit 170 supports CA of 5G in the first frequency band and the third frequency band means that the RF front-end circuit 170 supports the first frequency band of 5G and the third frequency band of 5G, and the RF front-end circuit 170 is in CA in the first frequency band and the third frequency band. Wherein, the RF front-end circuit 170 supports CA of 4G in the first frequency band and the third frequency band means that the RF front-end circuit 170 supports the first frequency band of 4G and the third frequency band of 4G, and the RF front-end circuit 170 is in CA in the first frequency band and the third frequency band.

[0105] In summary, the RF front-end circuit 170 provided by the embodiment of the present application uses one power supply 172, three switching switches, two PAs supporting transmission in the first frequency band, two PAs supporting transmission in the second frequency band, and two PAs supporting transmission in the third frequency band. By configuring the connection relationships among the power supply 172, the three switching switches, the two PAs supporting transmission in the first frequency band, the two PAs supporting transmission in the second frequency band, and the three PAs supporting transmission in the third frequency band, the RF front-end circuit 170 can support the first communication mode or the second communication mode and implement the switching between the first communication mode and the second communication mode. Therefore, the RF front-end circuit 170 can meet the working requirements of FDD transmission and TDD transmission (i.e., FDD + TDD) in the case of three-way transmission (3TX). In addition, when the first communication mode and the second communication mode include FDD transmission, the uplink coverage and rate enhancement of signals in the corresponding frequency bands can be realized by using FDD transmission, thus having better communication performance. Further, the RF front-end circuit 170 provided by the embodiment of the present application saves the number of power supplies 172 by configuring the connection relationships among the power supply 172, the three switching switches, the two PAs supporting transmission in the first frequency band, the two PAs supporting transmission in the second frequency band, and the three PAs supporting transmission in the third frequency band. Therefore, the cost of the RF front-end circuit 170 is saved and the area of the circuit board occupied when the RF front-end circuit 170 is applied to the electronic device 1 is saved. Furthermore, the size of the main board is smaller, which is beneficial to the miniaturization of the main board.

[0106] Please refer to Figure 6, the three ports include a first port 1722a, a second port 1722b, and a third port 1722c. The three switching switches include a first switching switch 173, a second switching switch 174, and a third switching switch 175. The first switching switch 173 has a first common terminal 173a, a first connection terminal 173b, and a second connection terminal 173c. The first common terminal 173a is electrically connected to the first port 1722a, and the first common terminal 173a is electrically connected to one of the first connection terminal 173b and the second connection terminal 173c. The second switching switch 174 has a second common terminal 174a, a third connection terminal 174b, and a fourth connection terminal 174c. The second common terminal 174a is electrically connected to the second port 1722b, and the second common terminal 174a is electrically connected to one of the third connection terminal 174b and the fourth connection terminal 174c. The third switching switch 175 has a third common terminal 175a, a fifth connection terminal 175b, and a sixth connection terminal 175c. The third common terminal 175a is electrically connected to one of the fifth connection terminal 175b and the sixth connection terminal 175c. The two PAs supporting the first frequency band include a first PA 181 and a second PA 182. The first PA 181 is electrically connected to the first connection terminal 173b, and the second PA 182 is electrically connected to the fifth connection terminal 175b. The two PAs supporting the second frequency band include a third PA 183 and a fourth PA 184. The third PA 183 is electrically connected to the second connection terminal 173c, and the fourth PA 184 is electrically connected to the fourth connection terminal 174c. The two PAs supporting the third frequency band include a fifth PA 185 and a sixth PA 186. The fifth PA 185 is electrically connected to the third connection terminal 174b, and the sixth PA 186 is electrically connected to the sixth connection terminal 175c.

[0107] In this embodiment, the first common terminal 173a is electrically connected to one of the first connection terminal 173b and the second connection terminal 173c. For example, the first common terminal 173a is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c; or, the first common terminal 173a is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c. When the first common terminal 173a is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the power supply 172 is electrically connected to the first PA 181, the power supply 172 supplies power to the first PA 181, and the first PA 181 supports the transmission of the first frequency band. When the first common terminal 173a is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the power supply 172 is electrically connected to the second PA 182, the power supply 172 supplies power to the second PA 182, and the second PA 182 supports the transmission of the first frequency band.

[0108] Correspondingly, the second common terminal 174a is electrically connected to one of the third connection terminal 174b and the fourth connection terminal 174c. For example, the second common terminal 174a is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c; or, the second common terminal 174a is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c. When the second common terminal 174a is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the power supply 172 is electrically connected to the third PA 183, the power supply 172 supplies power to the third PA 183, and the third PA 183 supports the transmission of the second frequency band. When the second common terminal 174a is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the power supply 172 is electrically connected to the fourth PA 184, the power supply 172 supplies power to the fourth PA 184, and the fourth PA 184 supports the transmission of the second frequency band.

[0109] Accordingly, in the present embodiment, the third common terminal 175a is electrically connected to one of the fifth connection terminal 175b and the sixth connection terminal 175c. For example, the third common terminal 175a is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c; or, the third common terminal 175a is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c. When the third common terminal 175a is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the power supply 172 is electrically connected to the fifth PA 185, the power supply 172 supplies power to the fifth PA 185, and the fifth PA 185 supports the transmission of the third frequency band. When the third common terminal 175a is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, the power supply 172 is electrically connected to the sixth PA 186, the power supply 172 supplies power to the sixth PA 186, and the sixth PA 186 supports the transmission of the third frequency band.

[0110] The radio frequency front-end circuit 170 provided by the embodiment of the present application can support the first communication mode or the second communication mode and realize the switching between the first communication mode and the second communication mode by configuring the connection relationships among the power supply 172, the first switching switch 173, the second switching switch 174, the third switching switch 175, the first PA 181, the second PA 182, the third PA 183, the fourth PA 184, the fifth PA 185, and the sixth PA 186. Therefore, the radio frequency front-end circuit 170 can meet the working requirements of FDD transmission and TDD transmission (i.e., FDD+TDD) in the case of three-way transmission (3TX). Further, the radio frequency front-end circuit 170 provided by the embodiment of the present application saves the number of power supplies 172 by configuring the connection relationships among the power supply 172, the first switching switch 173, the second switching switch 174, the third switching switch 175, the first PA 181, the second PA 182, the third PA 183, the fourth PA 184, the fifth PA 185, and the sixth PA 186. Therefore, the cost of the radio frequency front-end circuit 170 is saved and the area of the circuit board occupied when the radio frequency front-end circuit 170 is applied to the electronic device 1 is saved, and further the size of the main board is smaller, which is beneficial to the miniaturization of the main board.

[0111] Next, please refer to Figure 7 、 Figure 8 and Figure 9 , [[ID=]]Figure 7 For Figure 6Schematic diagram of the radio frequency front-end circuit shown when supporting the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band; Figure 8 is Figure 7 Schematic diagram of each port of the power supply in [] connected to each PA; Figure 9 is Figure 7 Truth table of the connection states of each switching switch in the radio frequency front-end circuit shown. When the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, and the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c: The radio frequency front-end circuit 170 supports the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band. In Figure 8 and Figure 9 taking the first frequency band as the LB frequency band, the second frequency band as the MHB frequency band, and the third frequency band as the UHB frequency band as an example for illustration, and marking the first communication mode as FDD(2T)+TDD(1T), and marking the second communication mode as FDD(1T)+TDD(2T), it can be understood that it should not be construed as a limitation on the embodiments of the present application, Figure 8 in the power supply port column in [], "1" represents the first port 1722a of the power supply 172, "2" represents the second port 1722b of the power supply 172, and "3" represents the third port 1722c of the power supply 172. In the PA column, LB(1#) represents the first PA 181, LB(2#) represents the second PA 182, MHB(1#) represents the third PA 183, MHB(2#) represents the fourth PA 184, UHB(1#) represents the fifth PA 185, and UHB(2#) represents the sixth PA 186. It can be understood that, Figure 8 and Figure 9 LB, MHB, and UHB in [] should not be construed as limitations on the first frequency band, the second frequency band, and the third frequency band. The LB shown in Figure 8 and Figure 9 can be replaced with the first frequency band, MHB can be replaced with the second frequency band, and UHB can be replaced with the third frequency band, Figure 8 and Figure 9 still holds. Among them, Figure 9In the truth table, the intersection of the "TX combination" column and the "PA combination" column indicates: the transmission mode before the "+" in the "TX combination" column and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode after the "+" in the "TX combination" column and the frequency band combination after the "+" in the "PA combination" column.

[0112] Specifically, at the intersection of the FDD(2T)+TDD(1T) column in the "TX combination" column and the specific frequency band combination column in the "PA combination" column, it indicates: the transmission mode FDD(2T) before the "+" in FDD(2T)+TDD(1)T and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode TDD(1T) after the "+" in FDD(2T)+TDD(1T) and the frequency band combination after the "+" in the "PA combination" column. For example, the intersection of FDD(2T)+TDD(1T) and the LB+UHB column in the "PA combination" column indicates LB band FDD(2T)+UHB band TDD(1T), that is, two-way FDD transmission in the LB band and one-way TDD transmission in the UHB band. Correspondingly, at the intersection of the FDD(1T)+TDD(2T) column in the "TX combination" column and the specific frequency band combination column in the "PA combination" column, it indicates the transmission mode FDD(1T) before the "+" in FDD(1T)+TDD(2T) and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode TDD(2T) after the "+" in FDD(1T)+TDD(2T) and the frequency band combination after the "+" in the "PA combination" column. For example, the intersection of FDD(1T)+TDD(2T) and the LB+UHB column in the "PA combination" column indicates LB band FDD(1T)+UHB band TDD(2T), that is, one-way FDD transmission in the LB band and two-way TDD transmission in the UHB band.

[0113] Furthermore, the number at the intersection of the FDD(2T)+TDD(1T) column and the PA combination column represents the corresponding relationship between the first communication mode (i.e., the FDD(2T)+TDD(1T) mode) and the conduction of the corresponding switch. Correspondingly, the number at the intersection of the FDD(1T)+TDD(2T) column and the PA combination column represents the corresponding relationship between the second communication mode (i.e., the FDD(1T)+TDD(2T) mode) and the conduction of the corresponding switch.

[0114] At the intersection of the LB+UHB fields in the FDD(2T)+TDD(1T) field and the PA combination, it indicates support for two-way FDD in the LB band and one-way TDD in the UHB band. The numbers at the intersection of the LB+UHB fields in the FDD(2T)+TDD(1T) field and the PA combination are 1, 3, and 2 respectively. Among them, "1" indicates that when the first switching switch 173 is turned on, it supports one-way FDD transmission in the LB band, "3" indicates that when the third switching switch 175 is turned on, it supports one-way FDD transmission in the LB band, and "2" indicates that when the second switching switch 174 is turned on, it supports one-way TDD transmission in the UHB band. In this embodiment, the first switching switch 173 can be electrically connected to one of the first PA 181 and the third PA 183. The first PA 181 supports the LB band, and the third PA 183 supports the MHB band. Therefore, when the first switching switch 173 is electrically connected to the first PA 181, it can support one-way FDD transmission in the LB band. In this embodiment, the third switching switch 175 can be electrically connected to one of the second PA 182 and the sixth PA 186. The second PA 182 supports the LB band, and the sixth PA 186 supports the UHB band. Therefore, when the third switching switch 175 is electrically connected to the second PA 182, it can support one-way FDD transmission in the LB band. In summary, since the first switching switch 173 is electrically connected to the first PA 181 to support one-way FDD transmission in the LB band, and the third switching switch 175 is electrically connected to the second PA 182 to support one-way FDD transmission in the LB band, that is, two-way FDD transmission in the LB band is achieved. Correspondingly, the second switching switch 174 can be electrically connected to one of the fifth PA 185 and the fourth PA 184. The fifth PA 185 supports the UHB band, and the fourth PA 184 supports the MHB band. Therefore, when the second switching switch 174 is electrically connected to the fifth PA, it can support one-way TDD transmission in the UHB band.

[0115] In summary, the numbers at the intersection of the LB+UHB fields in the FDD(2T)+TDD(1T) field and the PA combination are 1, 3, and 2 respectively, indicating that the first switching switch 173 is turned on to support the PA in the LB band (i.e., the first PA 181) to support one-way FDD transmission in the LB band, the third switching switch 175 is turned on to support the PA in the LB band (i.e., the second PA 182) to support the other one-way FDD transmission in the LB band, and the second switching switch 174 is turned on to support the PA in the UHB band (i.e., the fifth PA 185) to support one-way TDD transmission in the UHB band, thereby realizing FDD(2T) in the LB band + TDD(1T) in the UHB band. The above LB band is an example of the first band, and the UHB band is an example of the third band. In other words, the radio frequency front-end circuit 170 realizes FDD(2T) in the first band + TDD(1T) in the third band.

[0116] It should be noted that for the radio frequency front-end circuit 170 provided in the embodiment of the present application, the radio frequency front-end circuit 170 implements FDD (2T) in the first frequency band + TDD (1T) in the third frequency band, which is also referred to as the first communication mode in which the radio frequency front-end circuit 170 supports two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band. Both the first PA 181 and the second PA 182 support the first frequency band. The first frequency band includes multiple operating frequency bands. The operating frequency band supported by the first PA 181 is the same as the operating frequency band supported by the second PA 182, or the operating frequency band supported by the first PA 181 is different from the operating frequency band supported by the second PA 182.

[0117] Combined with Figure 7 With reference to the specific structure of the radio frequency front-end circuit 170 shown, the first switching switch 173 is used to conduct the PA supporting the LB frequency band (i.e., the first PA 181). Specifically, the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c. The third switching switch 175 conducts the PA supporting the LB frequency band (i.e., supporting the second PA 182). Specifically, the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c. The second switching switch 174 conducts the PA supporting the UHB frequency band (i.e., the fifth PA 185). Specifically, the second common terminal 174a is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c.

[0118] Correspondingly, in Figure 9 the truth table in, the numbers at the intersections of the columns of FDD (1T) + TDD (2T) and the columns of PA combinations indicate that the corresponding switching switches conduct the PAs supporting the corresponding frequency bands. For example, if the numbers at the intersections of the columns of FDD (1T) + TDD (2T) and the column of LB + UHB in the PA combination are 1, 2, and 3 respectively, it means that the first switching switch 173 conducts the PA supporting the LB frequency band (i.e., the first PA 181) to support one-way FDD transmission in the LB frequency band, the second switching switch 174 conducts the PA supporting the UHB frequency band (i.e., the fifth PA 185) to support one-way TDD transmission in the UHB frequency band, and the third switching switch 175 conducts the PA supporting the UHB frequency band (i.e., the sixth PA 186) to support the other one-way TDD transmission in the UHB frequency band. Thus, FDD (1T) in the LB frequency band + TDD (2T) in the UHB frequency band is achieved. In other words, the radio frequency front-end circuit 170 supports FDD (1T) in the first frequency band + TDD (2T) in the third frequency band.

[0119] It should be noted that the radio frequency front-end circuit 170 provided by the embodiment of the present application supports FDD (1T) in the first frequency band + TDD (2T) in the third frequency band, which is also referred to as the second communication mode in which the radio frequency front-end circuit 170 supports FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. The third frequency band includes multiple operating frequency bands. The operating frequency band supported by the fifth PA 185 is the same as that supported by the sixth PA 186, or the operating frequency band supported by the fifth PA 185 is different from that supported by the sixth PA 186.

[0120] Combined with Figure 7 the specific structure of the radio frequency front-end circuit 170 shown, the first switching switch 173 is used to support the PA in the LB frequency band (i.e., the first PA 181). Specifically, the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c. The second switching switch 174 is turned on to support the PA in the UHB frequency band (i.e., the fifth PA 185). Specifically, the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c. The third switching switch 175 is turned on to support the PA in the UHB frequency band (i.e., the sixth PA 186). Specifically, the third common terminal 175a of the third switching switch 175 is disconnected from the fifth common terminal and the third common terminal 175a is electrically connected to the sixth common terminal.

[0121] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the third frequency band.

[0122] Furthermore, please refer to again Figure 6 、 Figure 8 and Figure 9, when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, and the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, and the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection: the radio frequency front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band.

[0123] In this embodiment, the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c. Therefore, the first PA 181 supports one-way FDD transmission in the first frequency band. The third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c. Therefore, the second PA 182 supports the other one-way FDD transmission in the first frequency band. The second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection. Therefore, the fourth PA 184 supports one-way TDD transmission in the second frequency band. In other words, the radio frequency front-end circuit 170 provided in the embodiment of the present application can achieve FDD (2T) in the first frequency band + TDD (1T) in the second frequency band, which is also called the first communication mode in which the radio frequency front-end circuit 170 supports two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band. Both the first PA 181 and the second PA 182 support the first frequency band. When the first frequency band includes multiple operating frequency bands, the operating frequency band supported by the first PA 181 is the same as the operating frequency band supported by the second PA 182, or the operating frequency band supported by the first PA 181 is different from the operating frequency band supported by the second PA 182.

[0124] In summary, for the radio frequency front-end circuit provided in the embodiment of the present application, the radio frequency front-end circuit 170 can support the first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the second frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the second frequency band.

[0125] Further, please refer to againFigure 6 , Figure 8 and Figure 9 , in addition, please also refer to Figure 10 and Figure 11 . Figure 10 Schematic diagram of the third PA provided for an embodiment; Figure 11 Schematic diagram of the fourth PA provided for an embodiment. The second frequency band includes a first sub - working frequency band and a second sub - working frequency band. The third PA 183 includes a first sub - PA 1831 and a second sub - PA 1832. The fourth PA 184 includes a third sub - PA 1841 and a fourth sub - PA 1842. Both the first sub - PA 1831 and the third sub - PA 1841 support the first sub - working frequency band, and both the second sub - PA 1832 and the fourth PA 184 support the second sub - working frequency band.

[0126] In this embodiment, at least one of the first sub - PA 1831 and the second sub - PA 1832 can be electrically connected to the second connection end 173c. Specifically, it includes: the first sub - PA 1831 is electrically connected to the second connection end 173c, and the second sub - PA 1832 is electrically disconnected from the second connection end 173c; or, the first sub - PA 1831 is electrically disconnected from the second connection end 173c, and the second sub - PA 1832 is electrically connected to the second connection end 173c; or, the first sub - PA 1831 is electrically connected to the second connection end 173c, and the second sub - PA 1832 is electrically connected to the second connection end 173c.

[0127] Specifically, the third PA 183 includes a first sub - PA 1831, a second sub - PA 1832 and a first sub - switch 1833. The first sub - switch 1833 can be electrically connected to the first sub - PA 1831, and the first sub - switch 1833 can also be electrically disconnected from the first sub - PA 1831. Correspondingly, the first sub - switch 1833 can be electrically connected to the second sub - PA 1832, and the first sub - switch 1833 can also be electrically disconnected from the second sub - PA 1832. The electrical connection state between the first sub - switch 1833 and the first sub - PA 1831 does not affect the electrical connection state between the first sub - switch 1833 and the second sub - PA 1832.

[0128] For example, when the first sub-PA 1831 is electrically connected to the second connection terminal 173c, the first sub-PA 1831 is electrically connected to the second connection terminal 173c through the first sub-switch 1833. When the first sub-PA 1831 is disconnected from the second connection terminal 173c, the first sub-PA 1831 is disconnected from the second connection terminal 173c through the first sub-switch 1833. When the second sub-PA 1832 is electrically connected to the second connection terminal 173c, the second sub-PA 1832 is electrically connected to the second connection terminal 173c through the first sub-switch 1833. When the second sub-PA 1832 is disconnected from the second connection terminal 173c, the second sub-PA 1832 is disconnected from the second connection terminal 173c through the first sub-switch 1833.

[0129] Correspondingly, at least one of the third sub-PA 1841 and the fourth sub-PA 1842 can be electrically connected to the fourth connection terminal 174c. Specifically, it includes: the third sub-PA 1841 is electrically connected to the fourth connection terminal 174c, and the fourth sub-PA 1842 is disconnected from the fourth connection terminal 174c; or, the third sub-PA 1841 is disconnected from the fourth connection terminal 174c, and the fourth sub-PA 1842 is electrically connected to the fourth connection terminal 174c; or, the third sub-PA 1841 is electrically connected to the fourth connection terminal 174c, and the fourth sub-PA 1842 is electrically connected to the fourth connection terminal 174c.

[0130] Specifically, the fourth PA 184 includes a third sub-PA 1841, a fourth sub-PA 1842, and a second sub-switch 1843. The second sub-switch 1843 can be electrically connected to the third sub-PA 1841, and the second sub-switch 1843 can also be disconnected from the third sub-PA 1841. Correspondingly, the second sub-switch 1843 can be electrically connected to the fourth sub-PA 1842, and the second sub-switch 1843 can also be disconnected from the fourth sub-PA 1842. The electrical connection state between the second sub-switch 1843 and the third sub-PA 1841 does not affect the electrical connection state between the second sub-switch 1843 and the fourth sub-PA 1842.

[0131] For example, when the third sub-PA 1841 is electrically connected to the fourth connection terminal 174c, the third sub-PA 1841 is electrically connected to the fourth connection terminal 174c through the second sub-switch 1843. When the third sub-PA 1841 is disconnected from the fourth connection terminal 174c, the third sub-PA 1841 is disconnected from the fourth connection terminal 174c through the second sub-switch 1843. Correspondingly, when the fourth sub-PA 1842 is electrically connected to the fourth connection terminal 174c, the fourth sub-PA 1842 is electrically connected to the fourth connection terminal 174c through the second sub-switch 1843. When the fourth sub-PA 1842 is disconnected from the fourth connection terminal 174c, the fourth sub-PA 1842 is disconnected from the fourth connection terminal 174c through the second sub-switch 1843.

[0132] In this embodiment, when the radio frequency front-end circuit 170 supports a first communication mode of two-way FDD transmission in a first sub-working frequency band and TDD transmission in a second sub-working frequency band: the first sub-PA 1831 supports one-way FDD transmission in the first sub-working frequency band, the third sub-PA 1841 supports one-way FDD transmission in the first sub-working frequency band, and one of the second sub-PA 1832 and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-working frequency band.

[0133] Specifically, when the radio frequency front-end circuit 170 supports the first communication mode of two-way FDD transmission in the first sub-working frequency band and TDD transmission in the second sub-working frequency band, there are two cases: the first sub-PA 1831 supports one-way FDD transmission in the first sub-working frequency band, the third sub-PA 1841 supports one-way FDD transmission in the first sub-working frequency band, and the second sub-PA 1832 supports one-way TDD transmission in the second sub-working frequency band; or, the first sub-PA 1831 supports one-way FDD transmission in the first sub-working frequency band, the third sub-PA 1841 supports one-way FDD transmission in the first sub-working frequency band, and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-working frequency band.

[0134] Specifically, in one embodiment, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the first sub-PA 1831 and the second sub-PA 1832 through the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the third sub-PA 1841 through the fourth connection terminal 174c, the fourth sub-PA 1842 is disconnected from the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c: the RF front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first sub-operation frequency band and TDD transmission in the second sub-operation frequency band.

[0135] Alternatively, in another embodiment, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the first sub-PA 1831 through the second connection terminal 173c, the second sub-PA 1832 is disconnected from the second connection terminal 173c; the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the third sub-PA 1841 and the fourth sub-PA 1842 through the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c: the RF front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first sub-operation frequency band and TDD transmission in the second sub-operation frequency band.

[0136] For example, when the second frequency band includes a medium-high frequency band (MHB), the first sub-operation frequency band includes a medium frequency band (MB), and the second sub-operation frequency band includes a high frequency band (HB). Alternatively, in other embodiments, when the second frequency band includes a medium-high frequency band (MHB), the first sub-operation frequency band includes an HB band, and the second operation frequency band includes an MB band. The present application does not limit the relative magnitudes of the frequencies of the first sub-operation frequency band and the second sub-operation frequency band.

[0137] When the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the first switching switch 173 is electrically connected to the third PA 183, and the power supply 172 can supply power to the third PA 183 through the first switching switch 173. When the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is connected to the fourth connection terminal 174c, the second switching switch 174 is electrically connected to the fourth PA 184, and the power supply 172 can supply power to the fourth PA 184 through the second switching switch 174.

[0138] Since both the third PA 183 and the fourth PA 184 can support the transmission of the second frequency band, and the second frequency band includes a first sub-working frequency band and a second sub-frequency band, the third PA 183 includes a first sub-PA 1831 and a second sub-PA 1832, the first sub-PA 1831 supports the first sub-working frequency band, the second sub-PA 1832 supports the second sub-working frequency band, the fourth PA 184 includes a third sub-PA 1833 and a fourth sub-PA 1834, the third sub-PA 1833 supports the first sub-working frequency band, the fourth sub-PA 1834 supports the second sub-working frequency band. Therefore, in the radio frequency front-end circuit 170 provided by the embodiment of the present application, the first sub-PA 1831 supports one-way FDD transmission of the first sub-working frequency band, the third sub-PA 1841 supports one-way FDD transmission of the first sub-working frequency band, and one of the second sub-PA 1832 and the fourth sub-PA 1842 supports one-way TDD transmission of the second sub-working frequency band. In this way, the radio frequency front-end circuit 170 can implement a first communication mode that supports two-way FDD transmission of the first sub-working frequency band and TDD transmission of the second sub-working frequency band, so as to be able to implement the transmission of signals in the first sub-working frequency band and the transmission of signals in the second sub-working frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first sub-working frequency band and the second sub-working frequency band.

[0139] Further, please refer to again Figure 6 、 Figure 8 and Figure 9, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c: The radio frequency front-end circuit 170 supports a first communication mode of two-way FDD transmission in the second frequency band and one-way TDD transmission in the third frequency band.

[0140] In this embodiment, the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c. Therefore, the third PA 183 supports one-way FDD transmission in the second frequency band. The second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c. Therefore, the fourth PA 184 supports the other one-way FDD transmission in the second frequency band. The third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c. Therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can achieve FDD (2T) in the second frequency band + TDD (1T) in the third frequency band, which is also called the first communication mode in which the radio frequency front-end circuit 170 supports two-way FDD transmission in the second frequency band and one-way TDD transmission in the third frequency band. Both the third PA 183 and the fourth PA 184 support the second frequency band. When the second frequency band includes multiple operating frequency bands, the operating frequency band supported by the third PA 183 is the same as the operating frequency band supported by the fourth PA 184, or the operating frequency band supported by the third PA 183 is different from the operating frequency band supported by the fourth PA 184.

[0141] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the first communication mode of two-way FDD transmission in the second frequency band and one-way TDD transmission in the third frequency band, so as to be able to realize the transmission of signals in the second frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the second frequency band and the third frequency band.

[0142] Further, please refer to again Figure 6 、Figure 8 and Figure 9 When the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c: The RF front-end circuit 170 supports a first communication mode of FDD transmission in the first frequency band, FDD transmission in the second frequency band, and TDD transmission in the third frequency band.

[0143] In this embodiment, when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, therefore, the first PA 181 supports one-way FDD transmission in the first frequency band. The second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, therefore, the fourth PA 184 supports another one-way FDD transmission in the second frequency band. The third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. In other words, the RF front-end circuit 170 provided by the embodiment of the present application can achieve one-way FDD in the first frequency band transmission, one-way FDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band, which is also called the first communication mode in which the RF front-end circuit 170 supports one-way FDD in the first frequency band, one-way FDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band.

[0144] In summary, for the RF front-end circuit provided by the embodiment of the present application, the RF front-end circuit 170 can support the first communication mode of one-way FDD transmission in the first frequency band, one-way FDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band, so as to be able to realize the transmission of signals in the first frequency band, the second frequency band, and the third frequency band. When the electronic device 1 to which the RF front-end circuit 170 is applied is far from the base station 3, the RF front-end circuit 170 has good communication performance in the first frequency band, the second frequency band, and the third frequency band.

[0145] Further, please refer to again Figure 6 、 Figure 8 、 Figure 9 and Figure 12 ,Figure 12 For Figure 7 The circuit schematic diagram of the radio frequency front-end circuit in supports the second communication mode of one-way FDD transmission in the first frequency band and TDD transmission in the third frequency band. In this embodiment, when the first common terminal 173a of the first switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, and the second common terminal 174a of the second switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, and the third common terminal 175a of the third switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c: The radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band.

[0146] In this embodiment, when the first common terminal 173a of the first switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, therefore, the first PA 181 supports one-way FDD transmission in the first frequency band. The second common terminal 174a of the second switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. The third common terminal 175a of the third switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can achieve FDD(1T) in the first frequency band + TDD(2T) in the third frequency band, which is also called that the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the fifth PA 185 is the same as the operating frequency band supported by the sixth PA 186, or the operating frequency band supported by the fifth PA 185 is different from the operating frequency band supported by the sixth PA 186.

[0147] In summary, the radio frequency front-end circuit provided by the embodiment of the present application. The radio frequency front-end circuit 170 can support a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmissions in the third frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is relatively close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the third frequency band.

[0148] Further, please refer to Figure 6 , Figure 8 and Figure 9 . When the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, and the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c: The radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmissions in the second frequency band.

[0149] In this embodiment, when the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, therefore, the second PA 182 supports one-way FDD transmission in the first frequency band. The first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the third PA 183 supports one-way TDD transmission in the second frequency band. The second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, therefore, the fourth PA 184 supports one-way TDD transmission in the second frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can realize FDD(1T) in the first frequency band + TDD(2T) in the second frequency band, which is also called that the radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmissions in the second frequency band. Among them, both the third PA 183 and the fourth PA 184 support the second frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the third PA183 is the same as the operating frequency band supported by the fourth PA 184, or the operating frequency band supported by the third PA 183 is different from the operating frequency band supported by the fourth PA 184.

[0150] In summary, the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the second frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the second frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is relatively close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the second frequency band.

[0151] Further, please refer to Figure 6 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , the second frequency band includes a first sub-working frequency band and a second sub-working frequency band, and the third PA 183 includes a first sub-PA 1831 and a second sub-PA 1832. The fourth PA 184 includes a third sub-PA 1841 and a fourth sub-PA 1842. Both the first sub-PA 1831 and the third sub-PA 1841 support the first sub-working frequency band, and both the second sub-PA 1832 and the fourth sub-PA 184 support the second sub-working frequency band.

[0152] In this embodiment, at least one of the first sub-PA 1831 and the second sub-PA 1832 can be electrically connected to the second connection end 173c. Specifically, it includes: the first sub-PA 1831 is electrically connected to the second connection end 173c, and the second sub-PA 1832 is disconnected from the second connection end 173c; or, the first sub-PA 1831 is disconnected from the second connection end 173c, and the second sub-PA 1832 is electrically connected to the second connection end 173c; or, the first sub-PA 1831 is electrically connected to the second connection end 173c, and the second sub-PA 1832 is electrically connected to the second connection end 173c.

[0153] Correspondingly, at least one of the third sub-PA 1841 and the fourth sub-PA 1842 can be electrically connected to the fourth connection end 174c. Specifically, it includes: the third sub-PA 1841 is electrically connected to the fourth connection end 174c, and the fourth sub-PA 1842 is disconnected from the fourth connection end 174c; or, the third sub-PA 1841 is disconnected from the fourth connection end 174c, and the fourth sub-PA 1842 is electrically connected to the fourth connection end 174c; or, the third sub-PA 1841 is electrically connected to the fourth connection end 174c, and the fourth sub-PA 184 is electrically connected to the fourth connection end 174c.

[0154] When the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first sub-working frequency band and two-way TDD transmissions in the second sub-working frequency band: one of the first sub-PA 1831 and the third sub-PA 1833 supports one-way FDD transmission in the first sub-working frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-working frequency band, and the fourth sub-PA 1834 supports one-way TDD transmission in the second sub-working frequency band.

[0155] Specifically, when the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first sub-working frequency band and two-way TDD transmissions in the second sub-working frequency band, there are two cases: the first sub-PA 1831 supports one-way FDD transmission in the first sub-working frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-working frequency band, and the fourth sub-PA 1834 supports one-way TDD transmission in the second sub-working frequency band; or, the third sub-PA 1833 supports one-way FDD transmission in the first sub-working frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-working frequency band, and the fourth sub-PA 1834 supports one-way TDD transmission in the second sub-working frequency band.

[0156] Specifically, in an embodiment, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the first sub-PA 1831 is electrically connected to the second connection terminal 173c, and the second sub-PA 1832 is electrically connected to the second connection terminal 173c; when the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the fourth sub-PA 1834 is electrically connected to the fourth connection terminal 174c, and the third sub-PA 1833 is disconnected from the fourth connection terminal 174c; when the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c: the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first sub-working frequency band and two-way TDD transmissions in the second sub-working frequency band.

[0157] Alternatively, in another embodiment, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the first sub-PA 1831 is disconnected from the second connection terminal 173c, and the second sub-PA 1832 is electrically connected to the second connection terminal 173c; the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the third sub-PA 1833 is electrically connected to the fourth connection terminal 174c, and the fourth sub-PA 1834 is electrically connected to the fourth connection terminal 174c; when the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c: the RF front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmissions in the second sub-operation frequency band.

[0158] For example, when the second frequency band includes a medium-high frequency band (MHB), the first sub-operation frequency band includes a medium frequency band (MB), and the second sub-operation frequency band includes a high frequency band (HB).

[0159] When the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the first switching switch 173 is electrically connected to the third PA 183, and the power supply 172 can supply power to the third PA 183 through the first switching switch 173. When the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the second switching switch 174 is electrically connected to the fourth PA 184, and the power supply 172 can supply power to the fourth PA 184 through the second switching switch 174.

[0160] Since both the third PA 183 and the fourth PA 184 can support the transmission of the second frequency band, and the second frequency band includes a first sub - working frequency band and a second sub - frequency band, the third PA 183 includes a first sub - PA 1831 and a second sub - PA 1832, the first sub - PA 1831 supports the first sub - working frequency band, the second sub - PA 1832 supports the second sub - working frequency band, the fourth PA 184 includes a third sub - PA 1833 and a fourth sub - PA 1834, the third sub - PA 1833 supports the first sub - working frequency band, and the fourth sub - PA 1834 supports the second sub - working frequency band. Therefore, in the radio frequency front - end circuit 170 provided by the embodiment of the present application, one of the first sub - PA and the third sub - PA supports one - way FDD transmission of the first sub - working frequency band, the second sub - PA supports one - way TDD transmission of the second sub - working frequency band, and the fourth sub - PA supports one - way TDD transmission of the second sub - working frequency band. Thus, the radio frequency front - end circuit 170 supports a second communication mode of one - way FDD transmission of the first sub - working frequency band and two - way TDD transmission of the second sub - working frequency band, so as to be able to realize the transmission of signals in the first sub - working frequency band and the transmission of signals in the second sub - working frequency band. When the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 is relatively close, the radio frequency front - end circuit 170 has good communication performance in the first sub - frequency band and the second sub - frequency band.

[0161] Further, please refer to Figure 6 、 Figure 8 and Figure 9 , when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c: The radio frequency front - end circuit 170 supports a second communication mode of one - way FDD transmission of the second frequency band and two - way TDD transmission of the third frequency band.

[0162] In this embodiment, when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the third PA 183 supports one-way FDD transmission in the second frequency band. The second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. The third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can implement FDD (1T) in the second frequency band + TDD (2T) in the third frequency band, which is also called the second communication mode in which the radio frequency front-end circuit 170 supports one-way FDD transmission in the second frequency band and two-way TDD transmission in the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the fifth PA 185 is the same as the operating frequency band supported by the sixth PA 186, or the operating frequency band supported by the fifth PA 185 is different from the operating frequency band supported by the sixth PA 186.

[0163] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the second communication mode of one-way FDD transmission in the second frequency band and two-way TDD transmission in the third frequency band, so as to be able to implement the transmission of signals in the second frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the second frequency band and the third frequency band.

[0164] Further, please refer to Figure 6 、 Figure 8 and Figure 9, when the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, and the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c: the radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way transmission in the third frequency band.

[0165] In this embodiment, when the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, therefore, the second PA 182 supports one-way FDD transmission in the first frequency band. The first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the third PA 183 supports one-way TDD transmission in the second frequency band. The second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can achieve FDD (1T) in the first frequency band + TDD (1T) in the second frequency band + TDD (1T) in the third frequency band, which is also called that the radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band.

[0166] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support a second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band, so as to be able to achieve the transmission of signals in the first frequency band, the second frequency band, and the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band, the second frequency band, and the third frequency band.

[0167] Please refer to Figure 5 and Figure 13 , Figure 13 For Figure 5Schematic diagram of the RF front-end circuit in the RF transceiver device shown. Specifically, in this embodiment, the three ports include a first port 1722a, a second port 1722b, and a third port 1722c. The three switching switches include a first switching switch 173, a second switching switch 174, and a third switching switch 175. The first switching switch 173 has a first common terminal 173a, a first connection terminal 173b, and a second connection terminal 173c. The first common terminal 173a is electrically connected to the first port 1722a, and the first common terminal 173a is electrically connected to one of the first connection terminal 173b and the second connection terminal 173c. The second switching switch 174 has a second common terminal 174a, a third connection terminal 174b, and a fourth connection terminal 174c. The second common terminal 174a is electrically connected to the second port 1722b, and the second common terminal 174a is electrically connected to one of the third connection terminal 174b and the fourth connection terminal 174c. The third switching switch 175 has a third common terminal 175a, a fifth connection terminal 175b, and a sixth connection terminal 175c. The third common terminal 175a is electrically connected to one of the fifth connection terminal 175b and the sixth connection terminal 175c. Two PAs supporting the first frequency band include a first PA 181 and a second PA 182. The first PA 181 is electrically connected to the first connection terminal 173b, and the second PA 182 is electrically connected to the fourth connection terminal 174c. Two PAs supporting the second frequency band include a third PA 183 and a fourth PA 184. The third PA 183 is electrically connected to the third connection terminal 174b, and the fourth PA 184 is electrically connected to the fifth connection terminal 175b. Two PAs supporting the third frequency band include a fifth PA 185 and a sixth PA 186. The fifth PA 185 is electrically connected to the second connection terminal 173c, and the sixth PA 186 is electrically connected to the sixth connection terminal 175c.

[0168] In this embodiment, the first common terminal 173a is electrically connected to one of the first connection terminal 173b and the second connection terminal 173c. For example, the first common terminal 173a is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c; or, the first common terminal 173a is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c. When the first common terminal 173a is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the power supply 172 is electrically connected to the first PA 181, the power supply 172 supplies power to the first PA 181, and the first PA 181 supports the transmission of the first frequency band. When the first common terminal 173a is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, the power supply 172 is electrically connected to the fifth PA 185, the power supply 172 supplies power to the fifth PA 185, and the fifth PA 185 supports the transmission of the third frequency band.

[0169] Correspondingly, the second common terminal 174a is electrically connected to one of the third connection terminal 174b and the fourth connection terminal 174c. For example, the second common terminal 174a is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c; or, the second common terminal 174a is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c. When the second common terminal 174a is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the power supply 172 is electrically connected to the third PA 183, the power supply 172 supplies power to the third PA 183, and the third PA 183 supports the transmission of the second frequency band. When the second common terminal 174a is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the power supply 172 is electrically connected to the second PA 182, the power supply 172 supplies power to the second PA 182, and the second PA 182 supports the transmission of the first frequency band.

[0170] Accordingly, in the present embodiment, the third common terminal 175a is electrically connected to one of the fifth connection terminal 175b and the sixth connection terminal 175c. For example, the third common terminal 175a is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c; or, the third common terminal 175a is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c. When the third common terminal 175a is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the power supply 172 is electrically connected to the fourth PA 184, the power supply 172 supplies power to the fourth PA 184, and the fourth PA 184 supports the transmission of the second frequency band. When the third common terminal 175a is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, the power supply 172 is electrically connected to the sixth PA 186, the power supply 172 supplies power to the sixth PA 186, and the sixth PA 186 supports the transmission of the third frequency band.

[0171] The radio frequency front-end circuit 170 provided by the embodiment of the present application can support the first communication mode or the second communication mode and realize the switching between the first communication mode and the second communication mode by configuring the connection relationships among the power supply 172, the first switch 173, the second switch 174, the third switch 175, the first PA 181, the second PA 182, the third PA 183, the fourth PA 184, the fifth PA 185, and the sixth PA 186. Therefore, the radio frequency front-end circuit 170 can have better communication performance. Further, the radio frequency front-end circuit 170 provided by the embodiment of the present application saves the number of power supplies 172 by configuring the connection relationships among the power supply 172, the first switch 173, the second switch 174, the third switch 175, the first PA 181, the second PA 182, the third PA 183, the fourth PA 184, the fifth PA 185, and the sixth PA 186. Therefore, the cost of the radio frequency front-end circuit 170 is saved and the area of the circuit board occupied when the radio frequency front-end circuit 170 is applied to the electronic device 1 is saved, and further the size of the main board is smaller, which is beneficial to the miniaturization of the main board.

[0172] Please refer to Figure 13 、 Figure 14 、 Figure 15 and Figure 16 , Figure 14 for Figure 13Schematic diagram of the radio frequency front-end circuit shown when supporting the first communication mode with two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band; Figure 15 is Figure 13 Schematic diagram of each port of the power supply connecting to each PA in Figure 16 is Figure 13 Truth table of the connection states of each switching switch in the radio frequency front-end circuit shown in . When the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, the radio frequency front-end circuit 170 supports the first communication mode with two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band.

[0173] In Figure 15 and Figure 16 , taking the first frequency band as the LB frequency band, the second frequency band as the MHB frequency band, and the third frequency band as the UHB frequency band as an example for illustration, and marking the first communication mode as FDD(2T)+TDD(1T), and marking the second communication mode as FDD(1T)+TDD(2T). It can be understood that it should not be construed as a limitation on the embodiments of the present application. Figure 15 In the power supply port field in , "1" represents the first port 1722a of the power supply 172, "2" represents the second port 1722b of the power supply 172, and "3" represents the third port 1722c of the power supply 172. In the PA field, LB(1#) represents the first PA 181, LB(2#) represents the second PA 182, MHB(1#) represents the third PA 183, MHB(2#) represents the fourth PA 184, UHB(1#) represents the fifth PA 185, and UHB(2#) represents the sixth PA 186. It can be understood that Figure 15 and Figure 16 LB, MHB, and UHB in should not be construed as limitations on the first frequency band, the second frequency band, and the third frequency band. The LB shown in Figure 15 and Figure 16 can be replaced with the first frequency band, MHB can be replaced with the second frequency band, and UHB can be replaced with the third frequency band, Figure 15 and Figure 16 still holds. Among them, Figure 16In the truth table, the intersection of the "TX combination" column and the "PA combination" column indicates: the transmission mode before the "+" in the "TX combination" column and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode after the "+" in the "TX combination" column and the frequency band combination after the "+" in the "PA combination" column.

[0174] Specifically, at the intersection of the FDD(2T)+TDD(1T) column in the "TX combination" column and the specific frequency band combination column in the "PA combination" column, it indicates: the transmission mode FDD(2T) before the "+" in FDD(2T)+TDD(1)T and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode TDD(1T) after the "+" in FDD(2T)+TDD(1T) and the frequency band combination after the "+" in the "PA combination" column. For example, the intersection of FDD(2T)+TDD(1T) and the LB+UHB column in the "PA combination" column indicates LB band FDD(2T)+UHB band TDD(1T), that is, two-way FDD transmission in the LB band and one-way TDD transmission in the UHB band. Correspondingly, at the intersection of the FDD(1T)+TDD(2T) column in the "TX combination" column and the specific frequency band combination column in the "PA combination" column, it indicates the transmission mode FDD(1T) before the "+" in FDD(1T)+TDD(2T) and the frequency band combination before the "+" in the "PA combination" column, and the transmission mode TDD(2T) after the "+" in FDD(1T)+TDD(2T) and the frequency band combination after the "+" in the "PA combination" column. For example, the intersection of FDD(1T)+TDD(2T) and the LB+UHB column in the "PA combination" column indicates LB band FDD(1T)+UHB band TDD(2T), that is, one-way FDD transmission in the LB band and two-way TDD transmission in the UHB band.

[0175] Furthermore, the number at the intersection of the FDD(2T)+TDD(1T) column and the PA combination column represents the corresponding relationship between the first communication mode (i.e., the FDD(2T)+TDD(1T) mode) and the conduction of the corresponding switch. Correspondingly, the number at the intersection of the FDD(1T)+TDD(2T) column and the PA combination column represents the corresponding relationship between the second communication mode (i.e., the FDD(1T)+TDD(2T) mode) and the conduction of the corresponding switch.

[0176] For example, the number at the intersection of the FDD(2T)+TDD(1T) field and the PA combination field indicates that the corresponding switching switch is turned on to support the PA of the corresponding frequency band. For example, if the numbers at the intersections of the FDD(2T)+TDD(1T) field and the LB+UHB field in the PA combination are 1, 2, and 3 respectively, it means that the first switching switch 173 is turned on to support the PA for the LB frequency band (i.e., the first PA 181) to support one-way FDD transmission in the LB frequency band, the second switching switch 174 is turned on to support the PA for the LB frequency band (i.e., to support the second PA 182) to support another one-way FDD transmission in the LB frequency band, and the third switching switch 175 is turned on to support the PA for the UHB frequency band (i.e., the sixth PA 186) to support one-way TDD transmission in the UHB frequency band, thereby realizing FDD(2T) in the LB frequency band + TDD(1T) in the UHB frequency band. In other words, the radio frequency front-end circuit 170 realizes FDD(2T) in the first frequency band + TDD(1T) in the third frequency band.

[0177] It should be noted that for the radio frequency front-end circuit 170 provided in the embodiment of the present application, the radio frequency front-end circuit 170 realizes FDD(2T) in the first frequency band + TDD(1T) in the third frequency band, which is also referred to as the first communication mode in which the radio frequency front-end circuit 170 supports two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band. Both the first PA 181 and the second PA 182 support the first frequency band. When the first frequency band includes multiple operating frequency bands, the operating frequency bands supported by the first PA 181 are the same as those supported by the second PA 182, or the operating frequency bands supported by the first PA 181 are different from those supported by the second PA 182.

[0178] Combined Figure 13 With the specific structure of the radio frequency front-end circuit 170 shown, the first switching switch 173 is turned on to support the PA for the LB frequency band (i.e., the first PA 181). Specifically, the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c. The second switching switch 174 is turned on to support the PA for the LB frequency band (i.e., to support the second PA 182). Specifically, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c. The third switching switch 175 is turned on to support the PA for the UHB frequency band (i.e., the sixth PA 186). Specifically, the third common terminal 175a is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c.

[0179] Correspondingly, in Figure 16In the truth table, the numbers at the intersections of the FDD(1T)+TDD(2T) column and the columns of PA combinations indicate that the corresponding switching switches are turned on to support the PAs for the corresponding frequency bands. For example, if the numbers at the intersections of the FDD(1T)+TDD(2T) column and the LB+UHB column in the PA combination are 2, 1, and 3 respectively, it means that the second switching switch 174 is turned on to support the PA for the LB frequency band (i.e., the second PA 182) to support one-way FDD transmission for the LB frequency band, the first switching switch 173 is turned on to support the PA for the UHB frequency band (i.e., the fifth PA 185) to support one-way TDD transmission for the UHB frequency band, and the third switching switch 175 is turned on to support the PA for the UHB frequency band (i.e., the sixth PA 186) to support another one-way TDD transmission for the UHB frequency band. Thus, FDD(1T) for the LB frequency band + TDD(2T) for the UHB frequency band is achieved. In other words, the radio frequency front-end circuit 170 supports FDD(1T) for the first frequency band + TDD(2T) for the third frequency band.

[0180] It should be noted that the radio frequency front-end circuit 170 provided in the embodiment of the present application supports FDD(1T) for the first frequency band + TDD(2T) for the third frequency band, which is also referred to as the second communication mode in which the radio frequency front-end circuit 170 supports FDD transmission for the first frequency band and two-way TDD transmission for the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. The third frequency band includes multiple operating frequency bands. The operating frequency band supported by the fifth PA 185 is the same as the operating frequency band supported by the sixth PA 186, or the operating frequency band supported by the fifth PA 185 is different from the operating frequency band supported by the sixth PA 186.

[0181] Combined with Figure 13 the specific structure of the radio frequency front-end circuit 170 shown, the second switching switch 174 is used to support the PA for the LB frequency band (i.e., the second PA 182). Specifically, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c. The first switching switch 173 is turned on to support the PA for the UHB frequency band (i.e., the fifth PA 185). Specifically, the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c. The third switching switch 175 is turned on to support the PA for the UHB frequency band (i.e., the sixth PA 186). Specifically, the third common terminal 175a of the third switching switch 175 is disconnected from the fifth common terminal and the third common terminal 175a is electrically connected to the sixth common terminal.

[0182] In summary, the RF front-end circuit provided by the embodiment of the present application. The RF front-end circuit 170 can support a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the RF front-end circuit 170 is applied is far from the base station 3, the RF front-end circuit 170 has good communication performance in the first frequency band and the third frequency band.

[0183] Further, please refer to again Figure 13 、 Figure 15 and Figure 16 , when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the RF front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band.

[0184] In this embodiment, when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, therefore, the first PA 181 supports one-way FDD transmission in the first frequency band. The second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, therefore, the second PA 182 supports the other one-way FDD transmission in the first frequency band. The third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, therefore, the fourth PA 184 supports one-way TDD transmission in the second frequency band. In other words, the RF front-end circuit 170 provided by the embodiment of the present application can realize FDD(2T) in the first frequency band + TDD(1T) in the second frequency band, which is also called that the RF front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band. The first PA 181 and the second PA 182 both support the first frequency band. When the first frequency band includes multiple operating frequency bands, the operating frequency band supported by the first PA181 is the same as the operating frequency band supported by the second PA182, or, the operating frequency band supported by the first PA181 is different from the operating frequency band supported by the second PA 182.

[0185] In summary, the RF front-end circuit provided by the embodiment of the present application, the RF front-end circuit 170 can support a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the second frequency band. When the electronic device 1 to which the RF front-end circuit 170 is applied is far from the base station 3, the RF front-end circuit 170 has good communication performance in the first frequency band and the second frequency band.

[0186] Further, please refer to again Figure 13 , Figure 15 and Figure 16 , in addition, please refer to Figure 10 and Figure 11 , the second frequency band includes a first sub-working frequency band and a second sub-working frequency band. The third PA 183 includes a first sub-PA 1831 and a second sub-PA 1832. The fourth PA 184 includes a third sub-PA 1841 and a fourth sub-PA 1842. Both the first sub-PA 1831 and the third sub-PA 1841 support the first sub-working frequency band, and both the second sub-PA 1832 and the fourth PA 184 support the second sub-working frequency band. When the RF front-end circuit supports a first communication mode of two-way FDD transmission in the first sub-working frequency band and TDD transmission in the second sub-working frequency band: the first sub-PA supports one-way FDD transmission in the first sub-working frequency band, the third sub-PA supports one-way FDD transmission in the first sub-working frequency band, and one of the second sub-PA and the fourth sub-PA supports one-way TDD transmission in the second sub-working frequency band.

[0187] In this embodiment, at least one of the first sub-PA 1831 and the second sub-PA 1832 can be electrically connected to the third connection end 174b. Specifically, it includes: the first sub-PA 1831 is electrically connected to the third connection end 174b, and the second sub-PA 1832 is electrically disconnected from the third connection end 174b; or, the first sub-PA 1831 is electrically disconnected from the third connection end 174b, and the second sub-PA 1832 is electrically connected to the third connection end 174b; or, the first sub-PA 1831 is electrically connected to the third connection end 174b, and the second sub-PA 1832 is electrically connected to the third connection end 174b.

[0188] Accordingly, at least one of the third sub-PA 1841 and the fourth sub-PA 1842 can be electrically connected to the fifth connection terminal 175b. Specifically, it includes: the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, and the fourth sub-PA 1842 is disconnected from the fifth connection terminal 175b; or, the third sub-PA 1841 is disconnected from the fifth connection terminal 175b, and the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b; or, the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, and the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b.

[0189] Specifically, when the radio frequency front-end circuit 170 supports the first communication mode of two-way FDD transmission in the first sub-operation frequency band and TDD transmission in the second sub-operation frequency band, it includes two cases: the first sub-PA 1831 supports one-way FDD transmission in the first sub-operation frequency band, the third sub-PA 1841 supports one-way FDD transmission in the first sub-operation frequency band, and the second sub-PA 1832 supports one-way TDD transmission in the second sub-operation frequency band; or, the first sub-PA 1831 supports one-way FDD transmission in the first sub-operation frequency band, the third sub-PA 1841 supports one-way FDD transmission in the first sub-operation frequency band, and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-operation frequency band.

[0190] Specifically, in an embodiment, when the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the first sub-PA 1831 is electrically connected to the third connection terminal 174b, the second sub-PA 1832 is electrically connected to the third connection terminal 174b, and the second common terminal 174a is disconnected from the fourth connection terminal 174c; the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b, the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, the fourth sub-PA 1842 is disconnected from the fifth connection terminal 175b, and the third common terminal 175a is disconnected from the sixth connection terminal 175c, in the case where the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c: the radio frequency front-end circuit 170 supports the first communication mode of two-way FDD transmission in the first sub-operation frequency band and TDD transmission in the second sub-operation frequency band.

[0191] Alternatively, in another embodiment, when the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the first sub-PA 1831 is electrically connected to the third connection terminal 174b, the second sub-PA 1832 is disconnected from the third connection terminal 174b, and the second common terminal 174a is disconnected from the fourth connection terminal 174c; when the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b, the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b, and the third common terminal 175a is disconnected from the sixth connection terminal 175c, in the case where the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c: the RF front-end circuit 170 supports a first communication mode of two-way FDD transmission in the first sub-working frequency band and TDD transmission in the second sub-working frequency band.

[0192] For example, when the second frequency band includes a mid-high frequency band (MHB), the first sub-working frequency band includes a mid-frequency band (MB), and the second sub-working frequency band includes a high-frequency band (HB). When the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the first switching switch 173 is electrically connected to the third PA 183, and the power supply 172 can supply power to the third PA 183 through the second switching switch 174. When the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the third switching switch 175 is electrically connected to the fourth PA 184, and the power supply 172 can supply power to the fourth PA 184 through the third switching switch.

[0193] Since both the third PA 183 and the fourth PA 184 can support the transmission of the second frequency band, and the second frequency band includes a first sub - working frequency band and a second sub - frequency band, the third PA 183 includes a first sub - PA 1831 and a second sub - PA 1832, the first sub - PA 1831 supports the first sub - working frequency band, the second sub - PA 1832 supports the second sub - working frequency band, the fourth PA 184 includes a third sub - PA 1833 and a fourth sub - PA 1834, the third sub - PA 1833 supports the first sub - working frequency band, and the fourth sub - PA 1834 supports the second sub - working frequency band. Therefore, in the radio frequency front - end circuit 170 provided by the embodiment of the present application, the first sub - PA supports one - way FDD transmission of the first sub - working frequency band, the third sub - PA supports one - way FDD transmission of the first sub - working frequency band, and one of the second sub - PA and the fourth sub - PA supports one - way TDD transmission of the second sub - working frequency band. In this way, the radio frequency front - end circuit 170 implements a first communication mode that supports two - way FDD transmission of the first sub - working frequency band and TDD transmission of the second sub - working frequency band, so as to be able to implement the transmission of signals in the first sub - working frequency band and the transmission of signals in the second sub - working frequency band. When the electronic device 1 to which the radio frequency front - end circuit 170 is applied is far from the base station 3, the radio frequency front - end circuit 170 has good communication performance in the first sub - working frequency band and the second sub - working frequency band.

[0194] Further, please refer to again Figure 13 、 Figure 15 and Figure 16 When the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 17�b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, and the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c: The radio frequency front - end circuit 170 supports a first communication mode of two - way FDD transmission of the second frequency band and one - way TDD transmission of the third frequency band.

[0195] In this embodiment, when the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the third PA 183 supports one - way FDD transmission of the second frequency band.

[0196] The third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c. Therefore, the fourth PA 184 supports another FDD transmission of the second frequency band.

[0197] The first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c. Therefore, the fifth PA 185 supports a TDD transmission of the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can implement FDD (2T) of the second frequency band + TDD (1T) of the third frequency band, which is also called the first communication mode in which the radio frequency front-end circuit 170 supports two-way FDD transmissions of the second frequency band and one-way TDD transmission of the third frequency band. The third PA 183 and the fourth PA 184 both support the second frequency band. When the second frequency band includes multiple operating frequency bands, the operating frequency band supported by the third PA 183 is the same as the operating frequency band supported by the fourth PA 184, or the operating frequency band supported by the third PA 183 is different from the operating frequency band supported by the fourth PA 184.

[0198] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the first communication mode of two-way FDD transmissions of the second frequency band and one-way TDD transmission of the third frequency band, so as to be able to implement the transmission of signals in the second frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the second frequency band and the third frequency band.

[0199] Further, please refer to again Figure 13 、 Figure 15 and Figure 16 When the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, the radio frequency front-end circuit 170 supports the first communication mode of one-way FDD transmission of the first frequency band, one-way FDD transmission of the second frequency band, and one-way TDD transmission of the third frequency band.

[0200] In this embodiment, when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, therefore, the first PA 181 supports one-way FDD transmission of the first frequency band. The second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the third PA 183 supports one-way FDD transmission of the second frequency band. The third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission of the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can achieve one-way FDD for the first frequency band transmission, one-way FDD for the second frequency band transmission, and one-way TDD for the third frequency band transmission, which is also referred to as the first communication mode in which the radio frequency front-end circuit 170 supports one-way FDD for the first frequency band, one-way FDD transmission for the second frequency band, and one-way TDD transmission for the third frequency band.

[0201] In summary, the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the first communication mode of one-way FDD transmission for the first frequency band, one-way FDD transmission for the second frequency band, and one-way TDD transmission for the third frequency band, so as to be able to achieve the transmission of signals in the first frequency band, the second frequency band, and the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is far from the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band, the second frequency band, and the third frequency band.

[0202] Please refer to Figure 13 、 Figure 15 、 Figure 16 and Figure 17 , Figure 17 for Figure 13The circuit schematic diagram of the radio frequency front-end circuit in [description] supports the second communication mode of one-way FDD transmission in the first frequency band and TDD transmission in the third frequency band. In this embodiment, when the second common terminal 174a of the second switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, and the first common terminal 173a of the first switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, and the third common terminal 175a of the third switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band.

[0203] In this embodiment, when the second common terminal 174a of the second switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, therefore, the second PA 182 supports one-way FDD transmission in the first frequency band. The first common terminal 173a of the first switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. The third common terminal 175a of the third switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can achieve FDD(1T) in the first frequency band + TDD(2T) in the third frequency band, which is also called the second communication mode that the radio frequency front-end circuit 170 supports one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the fifth PA185 is the same as the operating frequency band supported by the sixth PA186, or the operating frequency band supported by the fifth PA 185 is different from the operating frequency band supported by the sixth PA 186.

[0204] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band, so as to be able to realize the transmission of signals in the first frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the third frequency band.

[0205] Please refer to Figure 13 、 Figure 15 、 Figure 16 When the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, and the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the second frequency band.

[0206] In this embodiment, when the first common terminal 173a of the first switching switch 173 is electrically connected to the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c, therefore, the first PA 181 supports one-way FDD transmission in the first frequency band. The second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the third PA 183 supports one-way TDD transmission in the second frequency band. The third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, therefore, the fourth PA 184 supports one-way TDD transmission in the second frequency band. In other words, the radio frequency front-end circuit 170 provided in the embodiment of the present application can achieve FDD(1T) in the first frequency band + TDD(2T) in the second frequency band, which is also called the second communication mode in which the radio frequency front-end circuit 170 supports one-way FDD transmission in the first frequency band and two-way TDD transmission in the second frequency band. Among them, both the third PA 183 and the fourth PA 184 support the second frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the third PA183 is the same as the operating frequency band supported by the fourth PA 184, or the operating frequency band supported by the third PA 183 is different from the operating frequency band supported by the fourth PA 184.

[0207] In summary, the radio frequency front-end circuit 170 provided by the embodiment of the present application can support a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmissions in the second frequency band, so that the transmission of signals in the first frequency band and the second frequency band can be realized. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is relatively close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band and the second frequency band.

[0208] Please refer to Figure 13 , Figure 15 , Figure 16 , and in addition, please also refer to Figure 10 and Figure 11 . The second frequency band includes a first sub-working frequency band and a second sub-working frequency band. The third PA 183 includes a first sub-PA 1831 and a second sub-PA 1832, the fourth PA 184 includes a third sub-PA 1841 and a fourth sub-PA 1842. Both the first sub-PA 1831 and the third sub-PA 1841 support the first sub-working frequency band, and both the second sub-PA 1832 and the fourth PA 184 support the second sub-working frequency band. When the radio frequency front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first sub-working frequency band and two-way TDD transmissions in the second sub-working frequency band: one of the first sub-PA 1831 and the third sub-PA 1841 supports one-way FDD transmission in the first sub-working frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-working frequency band, and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-working frequency band.

[0209] In this embodiment, at least one of the first sub-PA 1831 and the second sub-PA 1832 can be electrically connected to the third connection terminal 174b. Specifically, it includes: the first sub-PA 1831 is electrically connected to the third connection terminal 174b, and the second sub-PA 1832 is disconnected from the third connection terminal 174b; or, the first sub-PA 1831 is disconnected from the third connection terminal 174b, and the second sub-PA 1832 is electrically connected to the third connection terminal 174b; or, the first sub-PA 1831 is electrically connected to the third connection terminal 174b, and the second sub-PA 1832 is electrically connected to the third connection terminal 174b.

[0210] Accordingly, at least one of the third sub-PA 1841 and the fourth sub-PA 1842 can be electrically connected to the fifth connection terminal 175b. Specifically, it includes: the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, and the fourth sub-PA 1842 is disconnected from the fifth connection terminal 175b; or, the third sub-PA 1841 is disconnected from the fifth connection terminal 175b, and the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b; or, the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, and the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b.

[0211] Specifically, in an embodiment, when the RF front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmissions in the second sub-operation frequency band, it includes two cases: the first sub-PA 1831 supports one-way FDD transmission in the first sub-operation frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-operation frequency band, and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-operation frequency band; or, one of the third sub-PA 1841 supports one-way FDD transmission in the first sub-operation frequency band, the second sub-PA 1832 supports one-way TDD transmission in the second sub-operation frequency band, and the fourth sub-PA 1842 supports one-way TDD transmission in the second sub-operation frequency band.

[0212] Specifically, in an embodiment, when the second common terminal 174a of the second switch 174 is electrically connected to the third connection terminal 174b, the first sub-PA 1831 is electrically connected to the third connection terminal 174b, the second sub-PA 1832 is electrically connected to the third connection terminal 174b, and the second common terminal 174a is disconnected from the fourth connection terminal 174c; the third common terminal 175a of the third switch 175 is electrically connected to the fifth connection terminal 175b, the third sub-PA 1841 is disconnected from the fifth connection terminal 175b, the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b, and the third common terminal 175a is disconnected from the sixth connection terminal 175c; the first common terminal 173a of the first switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c: the RF front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmissions in the second sub-operation frequency band.

[0213] Alternatively, in another embodiment, when the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b, the first sub-PA 1831 is disconnected from the third connection terminal 174b, the second sub-PA 1832 is electrically connected to the third connection terminal 174b, and the second common terminal 174a is disconnected from the fourth connection terminal 174c; when the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b, the third sub-PA 1841 is electrically connected to the fifth connection terminal 175b, the fourth sub-PA 1842 is electrically connected to the fifth connection terminal 175b, and the third common terminal 175a is disconnected from the sixth connection terminal 175c; when the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is disconnected from the second connection terminal 173c: the RF front-end circuit 170 supports a second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmission in the second sub-operation frequency band.

[0214] For example, when the second frequency band includes a medium-high frequency band (MHB), the first sub-operation frequency band includes a medium frequency band (MB), and the second sub-operation frequency band includes a high frequency band (HB).

[0215] When the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the second switching switch 174 is electrically connected to the third PA 183, and the power supply 172 can supply power to the third PA 183 through the second switching switch 174. When the third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, the third switching switch 175 is electrically connected to the fourth PA 184, and the power supply 172 can supply power to the fourth PA 184 through the third switching switch.

[0216] Since both the third PA 183 and the fourth PA 184 can support the transmission of the second frequency band, and the second frequency band includes a first sub - working frequency band and a second sub - frequency band, the third PA 183 includes a first sub - PA 1831 and a second sub - PA 1832, the first sub - PA 1831 supports the first sub - working frequency band, the second sub - PA 1832 supports the second sub - working frequency band, the fourth PA 184 includes a third sub - PA 1833 and a fourth sub - PA 1834, the third sub - PA 1833 supports the first sub - working frequency band, and the fourth sub - PA 1834 supports the second sub - working frequency band. Therefore, one of the first sub - PA and the third sub - PA in the radio frequency front - end circuit 170 provided by the embodiment of the present application supports one - way FDD transmission of the first sub - working frequency band, the second sub - PA supports one - way TDD transmission of the second sub - working frequency band, and the fourth sub - PA supports one - way TDD transmission of the second sub - working frequency band. In this way, the radio frequency front - end circuit 170 realizes a second communication mode that supports one - way FDD transmission of the first sub - working frequency band and two - way TDD transmission of the second sub - working frequency band, so as to be able to realize the transmission of signals in the first sub - working frequency band and the second sub - working frequency band. When the distance between the electronic device 1 to which the radio frequency front - end circuit 170 is applied and the base station 3 is relatively close, the radio frequency front - end circuit 170 has good communication performance in the first sub - frequency band and the second sub - frequency band.

[0217] Please refer to Figure 13 、 Figure 15 、 Figure 16 When the second common terminal 174a of the second switching switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, the third common terminal 175a of the third switching switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, and the first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c: The radio frequency front - end circuit 170 supports a second communication mode of one - way FDD transmission of the second frequency band and two - way TDD transmission of the third frequency band.

[0218] In this embodiment, when the second common terminal 174a of the second switch 174 is electrically connected to the third connection terminal 174b and the second common terminal 174a is disconnected from the fourth connection terminal 174c, therefore, the third PA 183 supports one-way FDD transmission in the second frequency band. The third common terminal 175a of the third switch 175 is disconnected from the fifth connection terminal 175b and the third common terminal 175a is electrically connected to the sixth connection terminal 175c, therefore, the sixth PA 186 supports one-way TDD transmission in the third frequency band. The first common terminal 173a of the first switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can implement FDD (1T) in the second frequency band + TDD (2T) in the third frequency band, which is also called the second communication mode in which the radio frequency front-end circuit 170 supports one-way FDD transmission in the second frequency band and two-way TDD transmission in the third frequency band. Both the fifth PA 185 and the sixth PA 186 support the third frequency band. When the third frequency band includes multiple operating frequency bands, the operating frequency band supported by the fifth PA 185 is the same as the operating frequency band supported by the sixth PA 186, or the operating frequency band supported by the fifth PA 185 is different from the operating frequency band supported by the sixth PA 186.

[0219] In summary, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the second communication mode of one-way FDD transmission in the second frequency band and two-way TDD transmission in the third frequency band, so as to be able to implement the transmission of signals in the second frequency band and the transmission of signals in the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the second frequency band and the third frequency band.

[0220] Please refer to Figure 13 、 Figure 15 、 Figure 16 , when the second common terminal 174a of the second switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, the third common terminal 175a of the third switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, and the first common terminal 173a of the first switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c: the radio frequency front-end circuit 170 supports the second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band.

[0221] In this embodiment, when the second common terminal 174a of the second switching switch 174 is disconnected from the third connection terminal 174b and the second common terminal 174a is electrically connected to the fourth connection terminal 174c, therefore, the second PA 182 supports one-way FDD transmission in the first frequency band. The third common terminal 175a of the third switching switch 175 is electrically connected to the fifth connection terminal 175b and the third common terminal 175a is disconnected from the sixth connection terminal 175c, therefore, the fourth PA 184 supports one-way TDD transmission in the second frequency band. The first common terminal 173a of the first switching switch 173 is disconnected from the first connection terminal 173b and the first common terminal 173a is electrically connected to the second connection terminal 173c, therefore, the fifth PA 185 supports one-way TDD transmission in the third frequency band. In other words, the radio frequency front-end circuit 170 provided by the embodiment of the present application can implement FDD(1T) in the first frequency band + TDD(1T) in the second frequency band + TDD(1T) in the third frequency band, which is also called the second communication mode in which the radio frequency front-end circuit 170 supports one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band.

[0222] To sum up, for the radio frequency front-end circuit provided by the embodiment of the present application, the radio frequency front-end circuit 170 can support the second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band, so as to be able to implement the transmission of signals in the first frequency band, the second frequency band, and the third frequency band. When the electronic device 1 to which the radio frequency front-end circuit 170 is applied is close to the base station 3, the radio frequency front-end circuit 170 has good communication performance in the first frequency band, the second frequency band, and the third frequency band.

[0223] Please refer to Figure 6 and Figure 13 the radio frequency front-end circuit 170 shown. The power supply 172 and the three switching switches are of a split structure. Please also refer to Figure 18 and Figure 19 , Figure 18 which is a schematic diagram of a radio frequency front-end circuit provided by another embodiment of the present application; Figure 19 which is a schematic diagram of a radio frequency front-end circuit provided by yet another embodiment of the present application; Figure 20 is Figure 18 or Figure 19 a schematic diagram of the power switch integrated module in Figure 18 The radio frequency front-end circuit 170 shown in Figure 6 is basically the same as the radio frequency front-end circuit 170 shown in Figure 6In the radio frequency front-end circuit 170 shown, the power supply 172 and the three switching switches are of a split structure; while in Figure 18 In the radio frequency front-end circuit 170 shown, the power supply 172 and the three switching switches are integrated together. Figure 18 The truth table of the radio frequency front-end circuit 170 shown is the same as that of Figure 6 the radio frequency front-end circuit 170 described.

[0224] In this embodiment, since the power supply 172 and the three switching switches in the radio frequency front-end circuit 170 are integrated together, for the convenience of description, the module in which the power supply 172 and the three switching switches are integrated together is simply referred to as the power switch integrated module 200, or the power switch integrated chip. The power switch integrated module 200 includes three groups of pin pairs, and each group of pin pairs includes two pins. Each group of pin pairs corresponds to a switching switch, and different groups of pin pairs correspond to different switching switches. In one embodiment, each group of pin pairs is the two connection ends of a switching switch; in another embodiment, each group of pin pairs is not the two connection ends of the switching switch, and the two pins in the pin pair are respectively electrically connected to the two connection ends of the switching switch one by one.

[0225] When the power supply 172 in the radio frequency front-end circuit 170 is integrated with the three switching switches, the three switching switches can be arranged inside the package case of the power supply chip. When the power supply 172 in the radio frequency front-end circuit 170 is integrated with the three switching switches, the integration degree of the radio frequency front-end circuit 170 is relatively high and the connection is relatively simple.

[0226] Correspondingly, in Figure 19 the radio frequency front-end circuit 170 shown and Figure 13 the radio frequency front-end circuit 170 shown are basically the same, the difference being that Figure 13 in the radio frequency front-end circuit 170 shown, the power supply 172 and the three switching switches are of a split structure; while in Figure 19 in the radio frequency front-end circuit 170 shown, the power supply 172 and the three switching switches are integrated together. Figure 19 The truth table of the radio frequency front-end circuit 170 shown is the same as that of Figure 13 the radio frequency front-end circuit 170 shown.

[0227] In this embodiment, since the power supply 172 in the RF front-end circuit 170 is integrated with the three switching switches, for convenience of description, the module in which the power supply 172 and the three switching switches are integrated is simply referred to as the power switch integrated module 200. The power switch integrated module 200 includes three groups of pin pairs, and each group of pin pairs includes two pins. Each group of pin pairs corresponds to a switching switch, and different groups of pin pairs correspond to different switching switches. In one embodiment, each group of pin pairs is two connection ends of a switching switch; in another embodiment, each group of pin pairs is not two connection ends of a switching switch, and the two pins in the pin pair are respectively electrically connected to the two connection ends of the switching switch one by one.

[0228] When the power supply 172 in the RF front-end circuit 170 is integrated with the three switching switches, the three switching switches can be arranged in the package case of the power supply chip. When the power supply 172 in the RF front-end circuit 170 is integrated with the three switching switches, the integration degree of the RF front-end circuit 170 is relatively high and the connection is relatively simple.

[0229] The above are some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A radio frequency front-end circuit, characterized in that, The radio frequency front-end circuit includes: A receiver for transmitting signals in the first frequency band, the second frequency band, and the third frequency band; A power supply having a connection pin and three ports, the connection pin being electrically connected to the receiver; Three switching switches, each switching switch having a common terminal and two connection terminals, each common terminal being electrically connected to a port of the power supply, and different common terminals being electrically connected to different ports; Two PAs supporting the first frequency band transmission, the two PAs supporting the first frequency band being electrically connected to connection terminals of different switching switches; Two PAs supporting the second frequency band transmission, the two PAs supporting the second frequency band being electrically connected to connection terminals of different switching switches; Two PAs supporting the third frequency band transmission, the two PAs supporting the third frequency band being electrically connected to connection terminals of different switching switches; The radio frequency front-end circuit supports the switching between the first communication mode with three-way transmission and the second communication mode with three-way transmission; wherein, the first communication mode supports two-way FDD transmission of one or two of the first frequency band, the second frequency band, and the third frequency band, and one-way TDD transmission of the other; the second communication mode supports one-way FDD transmission of one of the first frequency band, the second frequency band, and the third frequency band, and two-way TDD transmission of the other or the other two.

2. The RF front-end circuit according to claim 1, wherein The three ports include a first port, a second port, and a third port; the three switching switches include a first switching switch, a second switching switch, and a third switching switch; The first switching switch has a first common terminal, a first connection terminal, and a second connection terminal, the first common terminal circuit being electrically connected to the first port, and the first common terminal being electrically connected to one of the first connection terminal and the second connection terminal; The second switching switch has a second common terminal, a third connection terminal, and a fourth connection terminal, the second common terminal being electrically connected to the second port, and the second common terminal being electrically connected to one of the third connection terminal and the fourth connection terminal; The third switching switch has a third common terminal, a fifth connection terminal, and a sixth connection terminal, the third common terminal being electrically connected to one of the fifth connection terminal and the sixth connection terminal; The two PAs supporting the first frequency band include a first PA and a second PA, the first PA being electrically connected to the first connection terminal, and the second PA being electrically connected to the fifth connection terminal; The two PAs supporting the second frequency band include a third PA and a fourth PA, the third PA being electrically connected to the second connection terminal, and the fourth PA being electrically connected to the fourth connection terminal; The two PAs supporting the third frequency band include a fifth PA and a sixth PA, the fifth PA being electrically connected to the third connection terminal, and the sixth PA being electrically connected to the sixth connection terminal.

3. The RF front-end circuit according to claim 2, wherein When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, and the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal: The RF front-end circuit supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band.

4. The RF front-end circuit according to claim 2, characterized in that, When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal: The RF front-end circuit supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band.

5. The RF front-end circuit according to claim 2, wherein The second frequency band includes a first sub-working frequency band and a second sub-working frequency band, the third PA includes a first sub-PA and a second sub-PA, the fourth PA includes a third sub-PA and a fourth sub-PA, the first sub-PA and the third sub-PA both support the first sub-working frequency band, and the second sub-PA and the fourth PA both support the second sub-working frequency band; When the RF front-end circuit supports a first communication mode of two-way FDD transmission in the first sub-working frequency band and TDD transmission in the second sub-working frequency band: The first sub-PA supports one-way FDD transmission in the first sub-working frequency band, the third sub-PA supports one-way FDD transmission in the first sub-working frequency band, and one of the second sub-PA and the fourth sub-PA supports one-way TDD transmission in the second sub-working frequency band.

6. The RF front-end circuit according to claim 2, wherein When the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal, the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal: The RF front-end circuit supports a first communication mode of two-way FDD transmission in the second frequency band and one-way TDD transmission in the third frequency band.

7. The radio frequency front-end circuit according to claim 2, wherein When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal: The RF front-end circuit supports a first communication mode of FDD transmission in the first frequency band, FDD transmission in the second frequency band, and TDD transmission in the third frequency band.

8. The RF front-end circuit according to claim 2, characterized in that, When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal: the RF front-end circuit supports a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band.

9. The RF front-end circuit according to claim 2, characterized in that, When the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal, and the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal: the RF front-end circuit supports a second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the second frequency band.

10. The radio frequency front-end circuit according to claim 2, wherein The second frequency band includes a first sub-operation frequency band and a second sub-operation frequency band, the third PA includes a first sub-PA and a second sub-PA, the fourth PA includes a third sub-PA and a fourth sub-PA, both the first sub-PA and the third sub-PA support the first sub-operation frequency band, and both the second sub-PA and the fourth PA support the second sub-operation frequency band; When the RF front-end circuit supports a second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmission in the second sub-operation frequency band: one of the first sub-PA and the third sub-PA supports one-way FDD transmission in the first sub-operation frequency band, the second sub-PA supports one-way TDD transmission in the second sub-operation frequency band, and the fourth sub-PA supports one-way TDD transmission in the second sub-operation frequency band.

11. The radio frequency front-end circuit according to claim 2, wherein When the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal, the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal: the RF front-end circuit supports a second communication mode of one-way FDD transmission in the second frequency band and two-way TDD transmission in the third frequency band.

12. The RF front-end circuit according to claim 2, wherein, When the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal, and the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal: the RF front-end circuit supports a second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band, and one-way transmission in the third frequency band.

13. The RF front-end circuit according to claim 1, characterized in that, The three ports include a first port, a second port, and a third port; the three switching switches include a first switching switch, a second switching switch, and a third switching switch; The first switching switch has a first common terminal, a first connection terminal, and a second connection terminal. The first common terminal is electrically connected to the first port, and the first common terminal is electrically connected to one of the first connection terminal and the second connection terminal; The second switching switch has a second common terminal, a third connection terminal, and a fourth connection terminal. The second common terminal is electrically connected to the second port, and the second common terminal is electrically connected to one of the third connection terminal and the fourth connection terminal; The third switching switch has a third common terminal, a fifth connection terminal, and a sixth connection terminal. The third common terminal is electrically connected to one of the fifth connection terminal and the sixth connection terminal; The two PAs supporting the first frequency band include a first PA and a second PA. The first PA is electrically connected to the first connection terminal, and the second PA is electrically connected to the fourth connection terminal; The two PAs supporting the second frequency band include a third PA and a fourth PA. The third PA is electrically connected to the third connection terminal, and the fourth PA is electrically connected to the fifth connection terminal; The two PAs supporting the third frequency band include a fifth PA and a sixth PA. The fifth PA is electrically connected to the second connection terminal, and the sixth PA is electrically connected to the sixth connection terminal.

14. The RF front-end circuit according to claim 13, wherein When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal, the radio frequency front-end circuit supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the third frequency band.

15. The radio frequency front-end circuit according to claim 13, wherein When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, and the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, the radio frequency front-end circuit supports a first communication mode of two-way FDD transmission in the first frequency band and one-way TDD transmission in the second frequency band.

16. The RF front-end circuit according to claim 13, wherein The second frequency band includes a first sub-working frequency band and a second sub-working frequency band. The third PA includes a first sub-PA and a second sub-PA. The fourth PA includes a third sub-PA and a fourth sub-PA. Both the first sub-PA and the third sub-PA support the first sub-working frequency band, and both the second sub-PA and the fourth PA support the second sub-working frequency band; When the RF front-end circuit supports the first communication mode of two-way FDD transmission in the first sub-operation frequency band and TDD transmission in the second sub-operation frequency band: the first sub-PA supports one-way FDD transmission in the first sub-operation frequency band, the third sub-PA supports one-way FDD transmission in the first sub-operation frequency band, and one of the second sub-PA and the fourth sub-PA supports one-way TDD transmission in the second sub-operation frequency band.

17. The radio frequency front-end circuit according to claim 13, wherein When the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, and the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal: the RF front-end circuit supports the first communication mode of two-way FDD transmission in the second frequency band and one-way TDD transmission in the third frequency band.

18. The RF front-end circuit according to claim 13, wherein, When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal, the RF front-end circuit supports the first communication mode of one-way FDD transmission in the first frequency band, one-way FDD transmission in the second frequency band, and one-way TDD transmission in the third frequency band.

19. The radio frequency front-end circuit according to claim 13, wherein When the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal, and the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal, the RF front-end circuit supports the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the third frequency band.

20. The radio frequency front-end circuit according to claim 13, characterized in that, When the first common terminal of the first switching switch is electrically connected to the first connection terminal and the first common terminal is disconnected from the second connection terminal, the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, and the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, the RF front-end circuit supports the second communication mode of one-way FDD transmission in the first frequency band and two-way TDD transmission in the second frequency band.

21. The radio frequency front-end circuit according to claim 13, wherein, The second frequency band includes a first sub-operation frequency band and a second sub-operation frequency band, the third PA includes a first sub-PA and a second sub-PA, the fourth PA includes a third sub-PA and a fourth sub-PA, both the first sub-PA and the third sub-PA support the first sub-operation frequency band, and both the second sub-PA and the fourth PA support the second sub-operation frequency band; When the radio frequency front-end circuit supports the second communication mode of one-way FDD transmission in the first sub-operation frequency band and two-way TDD transmissions in the second sub-operation frequency band: one of the first sub-PA and the third sub-PA supports one-way FDD transmission in the first sub-operation frequency band, the second sub-PA supports one-way TDD transmission in the second sub-operation frequency band, and the fourth sub-PA supports one-way TDD transmission in the second sub-operation frequency band.

22. The radio frequency front-end circuit according to claim 13, wherein When the second common terminal of the second switching switch is electrically connected to the third connection terminal and the second common terminal is disconnected from the fourth connection terminal, the third common terminal of the third switching switch is disconnected from the fifth connection terminal and the third common terminal is electrically connected to the sixth connection terminal, and the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal: the radio frequency front-end circuit supports the second communication mode of one-way FDD transmission in the second frequency band and two-way TDD transmissions in the third frequency band.

23. The radio frequency front-end circuit according to claim 13, characterized in that, When the second common terminal of the second switching switch is disconnected from the third connection terminal and the second common terminal is electrically connected to the fourth connection terminal, the third common terminal of the third switching switch is electrically connected to the fifth connection terminal and the third common terminal is disconnected from the sixth connection terminal, and the first common terminal of the first switching switch is disconnected from the first connection terminal and the first common terminal is electrically connected to the second connection terminal: the radio frequency front-end circuit supports the second communication mode of one-way FDD transmission in the first frequency band, one-way TDD transmission in the second frequency band and one-way TDD transmission in the third frequency band.

24. The radio frequency front-end circuit according to claim 1, wherein The first frequency band includes the LB band, the second frequency band includes the MHB band, and the third frequency band includes the UHB band.

25. The RF front-end circuit according to claim 1, characterized in that, The power supply and the three switching switches are of a split structure; Alternatively, the power supply and the three switching switches are integrated together.

26. A radio frequency transceiver device, characterized in that, The radio frequency transceiver device includes: The radio frequency front-end circuit according to any one of claims 1-25; and A first radiator supporting transmission in the first frequency band, the first radiator being electrically connected to one of the two PAs supporting the first frequency band; A second radiator supporting transmission in the first frequency band, the second radiator being electrically connected to the other of the two PAs supporting the first frequency band; A third radiator supporting transmission in the second frequency band, the third radiator being electrically connected to one of the two PAs supporting the second frequency band; A fourth radiator supporting transmission in the second frequency band, the fourth radiator being electrically connected to the other of the two PAs supporting the second frequency band; A fifth radiator supporting transmission in the third frequency band, the fifth radiator being electrically connected to one of the two PAs supporting the third frequency band; and A sixth radiator supporting transmission in the third frequency band, the sixth radiator being electrically connected to the other of the two PAs supporting the third frequency band.

27. An electronic device, characterized in that, The electronic device includes the radio frequency transceiver device according to claim 26.

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