Radio frequency circuit and electronic device

Abstract

This application relates to the field of communication technologies, and provides a radio frequency circuit (100) and an electronic device, which can resolve a problem of high costs of a radio frequency circuit (100). The radio frequency circuit (100) includes: a first amplifier (110), a first switch (120), a first frequency band transceiver unit (130), a second frequency band transceiver unit (140), and an antenna (150), where the first switch (120) includes a first movable end (A21), a first non-movable end (A22), and a second non-movable end (A23), where an input end of the first amplifier (110) is connected to a radio frequency transceiver, an output end of the first amplifier (110) is connected to the first movable end (A21), the first non-movable end (A22) is connected to one end of the first frequency band transceiver unit (130), the second non-movable end (A23) is connected to one end of the second frequency band transceiver unit (140), and the other end the first frequency band transceiver unit (130) and the other end of the second frequency band transceiver unit (140) are both connected to the antenna (150). (FIG. 1)

Description

RF circuits and electronic equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202011628264.3 filed in China on December 31, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of electronic products, and in particular to a radio frequency circuit and electronic equipment. Background Art

[0004] Electronic devices (e.g., mobile phones, tablets (portable Android devices, Pads), in-vehicle communication systems, etc.) need to achieve dual connectivity with base stations using Long Term Evolution (LTE) and New Radio (NR) in order to access non-standalone (NSA) networks for communication. This requires the electronic devices to have both LTE and NR RF front-end circuits capable of operating simultaneously. For example, a mobile communications operator requires that electronic devices that support NSA must support a dual connectivity (EUTRA-NR Dual Connectivity, EN-DC) combination with E-UTRA (Band 3+secondary band) and E-UTRA (Band 39+secondary band) as the Master Cell Group (MCG) and NR as the Secondary Cell Group (SCG), where E-UTRA stands for Evolved Universal Terrestrial Radio Access (UMTS).

[0005] Currently, electronic devices require RF solutions that implement an EN-DC combination with a second frequency band (such as Band 3+N41, Band 39+N41, etc.). This requires two independent power amplifiers (PAs) combined with other components to enable simultaneous operation of 4G and 5G networks. This requires an LTE PA circuit and a PA for a second frequency band (for example, the N41 band). The RF circuit is complex and requires a large number of discrete components, resulting in high circuit costs.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a radio frequency circuit and an electronic device, which can solve the problem of high cost of existing radio frequency circuits.

[0008] In order to solve the above technical problems, this application is implemented as follows:

[0009] In a first aspect, an embodiment of the present application provides a radio frequency circuit, comprising: a first amplifier, a first switch, a first frequency band transceiver unit, a second frequency band transceiver unit, and an antenna, wherein the first switch comprises a first movable end, a first fixed end, and a second fixed end;

[0010] The input end of the first amplifier is connected to the RF transceiver, the output end of the first amplifier is connected to the first movable end, the first fixed end is connected to one end of the first frequency band transceiver unit, the second fixed end is connected to one end of the second frequency band transceiver unit, and the other end of the first frequency band transceiver unit and the other end of the second frequency band transceiver unit are both connected to the antenna.

[0011] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the radio frequency circuit provided by each embodiment of the present application.

[0012] In the RF circuit of the embodiment of the present application, since the output end of the first amplifier is connected to the first moving end of the first switch, the first fixed end of the first switch is connected to one end of the first frequency band transceiver unit, and the second fixed end of the first switch is connected to one end of the second frequency band transceiver unit, the output end of the first amplifier can be connected to one end of the first frequency band transceiver unit or one end of the second frequency band transceiver unit through the first switch, that is, the first frequency band transceiver unit and the second frequency band transceiver unit can share the first amplifier, and there is no need to set up an amplifier for the first frequency band transceiver unit and the second frequency band transceiver unit respectively, which can reduce the number of devices in the RF circuit and thereby reduce the cost of the overall devices of the RF circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic diagram of a radio frequency circuit according to an embodiment of the present invention;

[0014] FIG2 is a schematic structural diagram of a second frequency band transceiver unit in a radio frequency circuit according to an embodiment of the present application;

[0015] FIG3 is a second structural diagram of a radio frequency circuit provided in an embodiment of the present application;

[0016] FIG4 is a schematic diagram showing a principle of implementing network communication using a radio frequency circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of this application can be implemented in an order other than those illustrated or described herein. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] The radio frequency circuit provided in the embodiments of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0020] As shown in FIG1 , the present application provides a radio frequency circuit 100 according to an embodiment, including: a first amplifier 110 , a first switch 120 , a first frequency band transceiver unit 130 , a second frequency band transceiver unit 140 , and an antenna 150 . The first switch 120 includes a first movable terminal A21 , a first fixed terminal A22 , and a second fixed terminal A23 .

[0021] The input end of the first amplifier 110 is connected to the RF transceiver, the output end of the first amplifier 110 is connected to the first movable end A21, the first fixed end A22 is connected to one end of the first frequency band transceiver unit 130, the second fixed end A23 is connected to one end of the second frequency band transceiver unit 140, and the other end of the first frequency band transceiver unit 130 and the other end of the second frequency band transceiver unit 140 are both connected to the antenna 150.

[0022] When the first movable end A21 and the first fixed end A22 of the first switch 120 are connected, the output end of the first amplifier 110 is connected to one end of the first frequency band transceiver unit 130 through the first switch 120. In this way, the output end of the first amplifier 110 is connected to the first sub-antenna through the first switch 120 and the first frequency band transceiver unit 130. The first amplifier 110 receives a signal of the first frequency band from the RF transceiver, amplifies the signal of the first frequency band, and transmits it to one end of the first frequency band transceiver unit 130 through the first switch 120. The amplified signal of the first frequency band is processed (for example, including filtering processing, etc.) by the first frequency band transceiver unit 130 and then transmitted to the antenna 150. When the first movable end A21 and the second fixed end A23 of the first switch 120 are connected, the output end of the first amplifier 110 is connected to one end of the second frequency band transceiver unit 140 through the first switch 120. That is, the output end of the first amplifier 110 is connected to the second sub-antenna through the first switch 120 and the second frequency band transceiver unit 140. The first amplifier 110 receives a signal in the second frequency band from the RF transceiver, amplifies the signal in the second frequency band, and transmits it to one end of the second frequency band transceiver unit 140 through the first switch 120. The amplified signal in the second frequency band is processed (e.g., including filtering) by the second frequency band transceiver unit 140 and then transmitted to the antenna 150. As an example, the first frequency band is a frequency band in the LTE frequency band, and the second frequency band is a frequency band in the 5G frequency band, such as a frequency band in the NR frequency band.

[0023] In the RF circuit of the embodiment of the present application, since the output end of the first amplifier 110 is connected to the first movable end A21 of the first switch 120, the first fixed end A22 of the first switch 120 is connected to one end of the first frequency band transceiver unit 130, and the second fixed end A23 of the first switch 120 is connected to one end of the second frequency band transceiver unit 140, the output end of the first amplifier 110 can be connected to one end of the first frequency band transceiver unit 130 or one end of the second frequency band transceiver unit 140 through the first switch 120. That is, the first frequency band transceiver unit 130 and the second frequency band transceiver unit 140 can share the first amplifier 110, and there is no need to provide an amplifier for the first frequency band transceiver unit 130 and the second frequency band transceiver unit 140 respectively, which can reduce the number of components in the RF circuit and thus reduce the cost of the overall components of the RF circuit. At the same time, since the RF circuit needs to be arranged on a printed circuit board (PCB), the area of ​​the PCB board occupied by the RF circuit is reduced due to the reduction in the number of components in the RF circuit, which can reduce the difficulty of PCB board layout. In addition, the demand for amplifiers can be reduced and the complexity of the RF circuit can be reduced, thus reducing path loss, thereby improving the sensitivity of the RF circuit and saving RF power consumption.

[0024] In one embodiment, the antenna 150 includes a first sub-antenna and a second sub-antenna, the other end of the first frequency band transceiver unit 130 is connected to the first sub-antenna, and the other end of the second frequency band transceiver unit 140 is connected to the second sub-antenna;

[0025] When the output end of the first amplifier 110 is connected to the first sub-antenna through the first switch 120 and the first frequency band transceiver unit 130, the first amplifier 110 is used to amplify the signal of the first frequency band, and the first frequency band transceiver unit 130 processes the amplified first frequency band signal and transmits it to the first sub-antenna;

[0026] When the output end of the first amplifier 110 is connected to the second sub-antenna through the first switch 120 and the second frequency band transceiver unit 140, the first amplifier 110 is used to amplify the signal of the second frequency band, and the second frequency band transceiver unit 140 processes the amplified second frequency band signal and transmits it to the second sub-antenna.

[0027] If the first movable terminal A21 of the first switch 120 is connected to the first fixed terminal A22, the output of the first amplifier 110 is connected to the first sub-antenna via the first switch 120 and the first frequency band transceiver unit 130. In this case, the first amplifier 110 can amplify signals in the first frequency band. The first frequency band transceiver unit 130 processes the amplified signals in the first frequency band and transmits them to the first sub-antenna, where the processed signals are transmitted via the first sub-antenna. If the first movable terminal A21 of the first switch 120 is connected to the second fixed terminal A23, the output of the first amplifier 110 is connected to the first sub-antenna via the first switch 120 and the second frequency band transceiver unit 140. In this case, the first amplifier 110 can amplify signals in the second frequency band. The second frequency band transceiver unit 140 processes the amplified signals in the second frequency band and transmits them to the second sub-antenna, where the processed signals are transmitted via the second sub-antenna. In other words, transmitting signals of different frequency bands through different sub-antennas can reduce interference and improve signal transmission performance.

[0028] As shown in FIG2 , in one embodiment, the second frequency band transceiver unit 140 includes: a second switch 141 , a second frequency band receiving port, a second frequency band filter, a third switch 142 and a first coupler 143 ;

[0029] Among them, the second switch 141 includes a third fixed end, a fourth fixed end and a second movable end, the third switch 142 includes a fifth fixed end and a third movable end, one end of the second frequency band transceiver unit 140 is the third fixed end of the second switch 141, the fourth fixed end is connected to the second frequency band receiving port, the second movable end is connected to the third movable end through the second frequency band filter, the fifth fixed end is connected to the first end of the first coupler 143, the second end of the first coupler 143 is connected to the antenna 150, and the other end of the second frequency band transceiver unit 140 is the second end of the first coupler 143.

[0030] It should be noted that the second end of the first coupler 143 can be connected to the second sub-antenna of the antenna 150. When the second movable end is connected to the third fixed end, the second fixed end of the first switch 120 is connected to the second frequency band filter via the second switch 141. The first amplifier 110 amplifies the signal in the second frequency band and transmits it to the second frequency band filter via the first switch 120 and the second switch 141. The amplified signal in the second frequency band is filtered by the second frequency band filter and then transmitted to the third switch 142. When the third movable end of the third switch 142 is connected to the fifth fixed end, the signal amplified in the second frequency band by the second frequency band filter can be transmitted to the first end of the first coupler 143 via the third switch 142. After coupling through the first coupler 143, the signal is transmitted to the antenna 150 via the second end. When the second movable end is connected to the fourth fixed end, the second frequency band receiving port is connected to the second frequency band filter through the second switch 141. When the third movable end of the third switch 142 is connected to the fifth fixed end, the first signal is received by the antenna 150, transmitted to the second end of the first coupler 143, coupled by the first coupler 143, and transmitted to the third switch 142 through the first end. The coupled signal is transmitted to the second frequency band filter through the third switch 142 for filtering processing and then transmitted to the second frequency band receiving port to realize signal reception, etc.

[0031] As an example, if the second frequency band transceiver unit is an N41 frequency band transceiver unit, as shown in Figure 2, the second frequency band receiving port is the N41 frequency band receiving port, that is, the N41 RX port in Figure 2, the second end of the first coupler 143 is the N41_ANT end in Figure 2, and the second frequency band filter is the N41 frequency band filter, which can pass the N41 frequency band, that is, the N41 SAW filter in Figure 2, and SAW is a Surface Acoustic Wave, that is, a surface acoustic wave filter.

[0032] As shown in Figure 2, in one embodiment, the third switch 142 also includes a fourth movable end, a sixth fixed end, a seventh fixed end and an eighth fixed end. The fourth movable end is used to connect to the input port of the target frequency band, such as the AUX_INPUT port in Figure 2. The target frequency band is one of the frequency bands in the new radio (NR) frequency band except the second frequency band. The sixth fixed end is connected to the first power output port, the seventh fixed end is connected to the second power output port, and the eighth fixed end is connected to the third power output port.

[0033] It should be noted that when the fourth movable terminal is connected to the sixth fixed terminal, the input port of the target frequency band is connected to the first power output port; when the fourth movable terminal is connected to the seventh fixed terminal, the input port of the target frequency band is connected to the second power output port; and when the fourth movable terminal is connected to the eighth fixed terminal, the input port of the target frequency band is connected to the third power output port. In other words, by being connected to the sixth, seventh, or eighth fixed terminal, the fourth movable terminal can transmit a signal of the target frequency band inputted at the input port of the target frequency band to the first, second, or third power output port, and output the signal through the first, second, or third power output port.

[0034] As shown in FIG. 2 , the second switch may be an SPDT (single-pole double-throw switch), the second frequency band filter may be a SAW switch, and the third switch may be a DP4T (double-pole four-throw switch).

[0035] The specific pin descriptions are as follows:

[0036] N41 TX: connected to the second fixed terminal of the first switch 120 connected to the first amplifier;

[0037] N41 RX: Connects to the receiving path devices outside the PA, such as LNA (low noise amplifier);

[0038] SPDT: RF single-pole double-throw switch, which enables the common terminal of the switch to switch between two paths;

[0039] Switch DP4T: Double-pole, four-throw switch. The three AUX_OUT pins in Figure 2 can be used as the sounding reference signal (SRS) power output ports for the N41 1T4R. AUX_INPUT can be used as input for other NR bands.

[0040] The first coupler: as part of a power detection loop, couples the transmission power output of the fifth fixed terminal of the third switch to the FBRX (power detection) port of the transmitter-receiver (TC).

[0041] NR_CPL_IN: This SPDT switching path connects NR_CPL_IN and NR_CPL_OUT. The power detection signal of the external NR band is input through NR_CPL_IN, passes through the SPDT path, and is output through NR_CPL_OUT. When the number of FBRX ports on the TC is limited, power detection signals of different frequency bands can be output through a common path.

[0042] NR_CPL_OUT: The output port of the power detection signal. After passing through the SPDT switching path, it can be connected to the coupler of the N41_ANT path or to the NR_CPL_IN port.

[0043] Specific signal path:

[0044] N41 transmit path: The N41 TX signal passes through the PA internal amplification circuit, then passes through the SPDT (SPDT switching, connecting the N41 TX end and the SAW end), passes through the N41 SAW, the DP4T switch (cut to the uppermost end on the right side), the first coupler, and is output through the N41 ANT port.

[0045] N41 receiving path: After the N41 RX signal passes through the antenna reception and front-end path, it enters the RF circuit through the N41_ANT port, passes through the N41 SAW and SPDT (SPDT switching connects the SAW end and the N41 RX end);

[0046] N41 SRS path: The N41 TX signal passes through the PA internal amplification circuit and then passes through the SPDT (SPDT switching, connecting the N41 TX end and the SAW end), then passes through the N41 SAW, DP4T switch (the right side is cut to the three ports below), and is connected to other N41 receiving paths through the AUX_OUT output to realize the SRS function.

[0047] N41 power coupling: When the N41 TX signal passes through the first coupler after the DP4T switch, the first coupler is coupled to a certain power (the coupling power is determined by the coupling factor) and passes through the SPDT switch (SPDT switching connects the coupler and NR_CPL_OUT).

[0048] As shown in Figure 3, in one embodiment, the second frequency band transceiver unit 140 also includes a fourth switch 144, the fourth switch 144 includes a fifth movable end, a ninth fixed end and a tenth fixed end, the ninth fixed end is connected to the third end of the first coupler 143, the tenth fixed end is used to connect to the power detection signal input port, and the fifth movable end is used to connect to the power detection signal output port.

[0049] If the signal filtered by the second frequency band filter after amplification of the second frequency band signal is transmitted to the first end of the first coupler 143 via the third switch 142, the first coupled signal obtained by coupling through the first coupler 143 is transmitted to the antenna 150 via the second end, and the second coupled signal obtained by coupling through the first coupler 143 can be transmitted to the ninth fixed end via the third end. If the fifth movable end is connected to the ninth fixed end, the third end is connected to the power detection signal output port, and the second coupled signal can be output through the power detection signal output port. If the fifth movable end is connected to the tenth fixed end, the power detection signal input port is connected to the power detection signal output port.

[0050] As shown in FIG3 , in one embodiment, the first frequency band transceiver unit 130 includes a fifth switch 131 , a first frequency band receiving port, and a first frequency band filter 132 . The fifth switch 131 includes a sixth movable terminal, an eleventh fixed terminal, and a twelfth fixed terminal.

[0051] One end of the first frequency band transceiver unit 130 is the eleventh fixed end of the fifth switch 131, the twelfth fixed end is connected to the first frequency band receiving port, the sixth movable end is connected to one end of the first frequency band filter, the other end of the first frequency band filter is used to connect to the antenna 150, and the other end of the first frequency band transceiver unit 130 is the other end of the first frequency band filter 132.

[0052] It should be noted that the other end of the first frequency band filter can be connected to the first sub-antenna of antenna 150. When the sixth movable terminal is connected to the eleventh fixed terminal, if the first fixed terminal of the first switch 120 is connected to the first movable terminal, the first fixed terminal of the first switch 120 is connected to the first frequency band filter via the fifth switch 131. The first amplifier 110 amplifies the first frequency band signal and transmits it to the first frequency band filter via the first switch 120 and the fifth switch 131. The amplified first frequency band signal is filtered by the first frequency band filter and then transmitted to the antenna 150. When the sixth movable terminal is connected to the twelfth fixed terminal, the first frequency band receiving port is connected to the first frequency band filter via the fifth switch 131. Signals are received by antenna 150, transmitted to the first frequency band filter for filtering, and then transmitted to the first frequency band receiving port, thereby achieving signal reception. For example, if the first frequency band transceiver unit is a B41 frequency band transceiver unit, as shown in FIG3 , the first frequency band receiving port can be the B41 RX port in FIG3 . It should be noted that, in the drawings provided in this application, TRX stands for transceiver, RX stands for receive, TX stands for transmit, DRX stands for diversity receive, PRX stands for main receive, and MIMO stands for multiple input multiple output.

[0053] In one embodiment, the RF circuit further includes a third frequency band transceiver unit, and the first switch 120 further includes a thirteenth fixed end, which is connected to one end of the third frequency band transceiver unit, and the other end of the third frequency band transceiver unit is used to connect to the antenna 150.

[0054] That is, the first frequency band transceiver unit 130, the second frequency band transceiver unit 140, and the third frequency band transceiver unit can share a first amplifier 110, thereby reducing the number of amplifiers and the cost of radio frequency circuits. As an example, as shown in FIG3 , the third frequency band transceiver unit may include a B40 frequency band transceiver unit, i.e., the third frequency band is the B40 frequency band. The third frequency band transceiver unit may include a control switch 161, a third frequency band filter 162, and a third frequency band receiving port. The control switch 161 includes a control active end, a first control static end, and a second control static end. One end of the third frequency band transceiver unit is the first control static end, which is connected to the thirteenth static end. The second control static end is connected to the third frequency band receiving port. The control active end is connected to one end of the third frequency band filter. The other end of the third frequency band transceiver unit is the other end of the third frequency band filter.

[0055] As shown in FIG3 , in one embodiment, the RF circuit may further include a B7-band transceiver unit, which includes a B7-band filter 163. The B7-band filter includes a first port, a second port, and a third port. The first switch 120 also includes a fourteenth fixed terminal connected to the first port, the second port connected to the B7-band receiving port, and the third port for connecting to the antenna 150. This allows the B7-band transceiver unit, the first-band transceiver unit 130, the second-band transceiver unit 140, and the third-band transceiver unit to share a single first amplifier 110.

[0056] As shown in FIG3 , in one embodiment, the RF circuit further includes a second amplifier 170, a sixth switch 180, a fourth-band transceiver unit, a seventh switch 190, and a second coupler 200. The sixth switch 180 includes a seventh movable terminal and a plurality of fourteenth fixed terminals. The seventh switch 190 includes a plurality of fifteenth fixed terminals and connected eighth and ninth movable terminals. The fourth-band transceiver unit includes a first duplexer module 201. One side of the first duplexer module 201 includes a plurality of first transmission ports and a plurality of second transmission ports. The other side of the first duplexer module 201 includes a third transmission port.

[0057] The input end of the second amplifier 170 is connected to the RF transceiver, the output end of the second amplifier 170 is connected to the seventh fixed terminal, each first transmission port is connected to a fourteenth fixed terminal, and the fourteenth fixed terminals connected to the multiple first transmission ports are different, each second transmission port is connected to a receiving port of the corresponding frequency band, the third transmission port is connected to a fifteenth fixed terminal, the other end of the first frequency band transceiver unit is connected to the fifteenth fixed terminal, and the other end of the second frequency band transceiver unit is connected to the fifteenth fixed terminal, and the fifteenth fixed terminal connected to the other end of the second frequency band transceiver unit is different from the fifteenth fixed terminal connected to the other end of the first frequency band transceiver unit, and both are different from the fifteenth fixed terminal connected to the third transmission port. The eighth and ninth fixed terminals are used to connect to the seventh terminal of the second coupler, and the eighth terminal of the second coupler 200 is connected to the antenna. For example, the eighth terminal of the second coupler 200 can be the MHB_ANT terminal shown in Figure 3.

[0058] It is understood that the fourth frequency band transceiver unit includes multiple frequency band transceiver subunits, each of which includes a duplexer for the corresponding frequency band, and the duplexers of the multiple frequency band transceiver units form a first duplexer module. The multiple first transmission ports include transmitters for the multiple frequency bands corresponding to the multiple frequency band transceiver units, and the multiple second transmission ports include receivers for the multiple frequency bands corresponding to the multiple frequency band transceiver units.

[0059] As an example, the radio frequency circuit further includes a fifth frequency band transceiver unit, which includes a second duplexer 202. One side of the second duplexer includes a first transmitter and a first receiver for the fifth frequency band, and the other side of the second duplexer includes a second transmitter and a second receiver for the fifth frequency band. The first transmitter is connected to a fourth fixed terminal, which is different from the fourteenth fixed terminal connected to the multiple first transmission ports, and the first receiver is connected to a receive port for the fifth frequency band. The second transmitter and the second receiver are each connected to a fifteenth fixed terminal, and the connected fifteenth fixed terminals are different.

[0060] For example, the multiple frequency band transceiver units include a B3 frequency band transceiver unit, a B1 / B4 frequency band transceiver unit, and a B2 frequency band transceiver unit. The four fourteenth fixed terminals in the fifth switch 131 are D51, D52, D53, and D54, respectively. Each first transmission port is connected to a different fourteenth fixed terminal, i.e., the first transmission port of the B3 frequency band transceiver unit is connected to D51, the first transmission port of the B1 / B4 frequency band transceiver unit is connected to D52, and the first transmission port of the B2 frequency band transceiver unit is connected to D53. The second transmission port of the B3 frequency band transceiver unit is connected to the B3 frequency band receiving port, the second transmission port of the B1 / B4 frequency band transceiver unit is connected to the B1 / B4 frequency band receiving port, and the second transmission port of the B2 frequency band transceiver unit is connected to the B2 frequency band receiving port. The multiple fifteenth fixed terminals include D61, D62, D63, D64, D65, D66, and D67, and the third transmission port is connected to a fifteenth fixed terminal, i.e., D61. For example, the fifth-band transceiver unit may include a B39-band transceiver unit, with its first transmitting end connected to D54, its first receiving end connected to the B39-band receiving port, its second transmitting end connected to a fifteenth fixed end, namely, D62, and its second receiving end connected to a fifteenth fixed end, namely, D63. The third port of the B7-band transceiver unit is connected to D64, i.e., the third port of the B7-band transceiver unit is connected to antenna 150 via a sixth switch and a second coupler 200. The other end of the filter in the B40-band transceiver unit is connected to D65, i.e., the other end of the filter in the B40-band transceiver unit is connected to antenna 150 via a sixth switch and a second coupler 200. The other end of the first-band filter in the first-band transceiver unit 130 is connected to D66, i.e., the other end of the first-band filter is connected to D66 via a sixth switch and a second coupler 200. The fifth end of the B34-band transceiver unit is also connected to a fifteenth fixed end, namely, D67, of the sixth switch.

[0061] As an example, the first amplifier 110 may be a high-frequency amplifier, and the second amplifier may be an intermediate-frequency amplifier. The filters in each embodiment of the present application may all be bandpass filters. For example, the first frequency band filter is a filter that filters out signals in the first frequency band while passing signals in other frequency bands, and the second frequency band filter is a filter that filters out signals in the second frequency band while passing signals in other frequency bands.

[0062] As shown in FIG3 , in one embodiment, the frequency band ranges of the first frequency band and the second frequency band at least partially overlap. For example, the first frequency band transceiver unit 130 may include a B41 frequency band transceiver unit, and the second frequency band transceiver unit 140 may include an N41 frequency band transceiver unit. Furthermore, the second frequency band transceiver unit 140 may also include an N1 frequency band transceiver unit, an N3 frequency band transceiver unit, and an N28 frequency band transceiver unit. The second frequency band transceiver unit 140 may respectively include a first target frequency band transceiver unit whose frequency band range at least partially overlaps with the N1 frequency band, a second target frequency band transceiver unit whose frequency band range at least partially overlaps with the N3 frequency band, and a third target frequency band transceiver unit whose frequency band range at least partially overlaps with the N28 frequency band.

[0063] As shown in Figure 3, taking the EN-DC combination of B39+N41 as an example, the LTE B39TRX circuit is shown in Figure 3. The LTE B39 signal is coupled through the second amplifier 170, the sixth switch 180, the B39 filter 220, the seventh switch 190, and the second coupler 200 and then output from the MHB_ANT port.

[0064] The N41 TRX circuit is shown in FIG3 . The N41 signal passes through the first amplifier 110 , the first switch 120 , the N41 SAW filter, the DP4T RF switch, and the first coupler, and is output from the N41_ANT port to the ANT3 antenna.

[0065] The other RX pathways of N41 are shown in Figure 3.

[0066] The RF circuit of the present invention eliminates the need for a separate N41 PA, nor does it require the VCC power supply and RFFE control signals required by a separate PA. The N41 TRX path eliminates components such as combiners, reducing costs.

[0067] An embodiment of the present application further provides an electronic device, including: the radio frequency circuit 100 provided in each embodiment of the present application.

[0068] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0069] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A radio frequency circuit, comprising: a first amplifier, a first switch, a first frequency band transceiver unit, a second frequency band transceiver unit, and an antenna, wherein the first switch includes a first movable end, a first fixed end, and a second fixed end; The input end of the first amplifier is connected to the RF transceiver, the output end of the first amplifier is connected to the first movable end, the first fixed end is connected to one end of the first frequency band transceiver unit, the second fixed end is connected to one end of the second frequency band transceiver unit, and the other end of the first frequency band transceiver unit and the other end of the second frequency band transceiver unit are both connected to the antenna.

2. The radio frequency circuit according to claim 1, wherein: The antenna includes a first sub-antenna and a second sub-antenna, the other end of the first frequency band transceiver unit is connected to the first sub-antenna, and the other end of the second frequency band transceiver unit is connected to the second sub-antenna; When the output end of the first amplifier is connected to the first sub-antenna through the first switch and the first frequency band transceiver unit, the first amplifier is used to amplify the signal of the first frequency band, and the first frequency band transceiver unit processes the amplified signal of the first frequency band and transmits it to the first sub-antenna; When the output end of the first amplifier is connected to the second sub-antenna through the first switch and the second frequency band transceiver unit, the first amplifier is used to amplify the signal of the second frequency band, and the second frequency band transceiver unit processes the amplified second frequency band signal and transmits it to the second sub-antenna.

3. The radio frequency circuit according to claim 1, wherein the second frequency band transceiver unit comprises: a second switch, a second frequency band receiving port, a second frequency band filter, a third switch, and a first coupler; The second switch includes a third fixed end, a fourth fixed end, and a second movable end; the third switch includes a fifth fixed end and a third movable end; one end of the second frequency band transceiver unit is the third fixed end of the second switch; the fourth fixed end is connected to the second frequency band receiving port; the second movable end is connected to the third movable end via the second frequency band filter; the fifth fixed end is connected to the first end of the first coupler; the second end of the first coupler is connected to the antenna; and the other end of the second frequency band transceiver unit is the second end of the first coupler.

4. The radio frequency circuit according to claim 3, wherein: The third switch also includes a fourth movable end, a sixth fixed end, a seventh fixed end and an eighth fixed end, the fourth movable end is used to connect to the input port of the target frequency band, the target frequency band is one of the frequency bands in the new radio interface NR frequency band except the second frequency band, the sixth fixed end is connected to the first power output port, the seventh fixed end is connected to the second power output port, and the eighth fixed end is connected to the third power output port.

5. The radio frequency circuit according to claim 3, wherein: The second frequency band transceiver unit also includes a fourth switch, which includes a fifth movable end, a ninth fixed end and a tenth fixed end, the ninth fixed end is connected to the third end of the first coupler, the tenth fixed end is used to connect to the power detection signal input port, and the fifth movable end is used to connect to the power detection signal output port.

6. The radio frequency circuit according to claim 1, wherein: The first frequency band transceiver unit includes a fifth switch, a first frequency band receiving port and a first frequency band filter, and the fifth switch includes a sixth movable end, an eleventh fixed end and a twelfth fixed end; One end of the first frequency band transceiver unit is the eleventh fixed end of the fifth switch, the twelfth fixed end is connected to the first frequency band receiving port, the sixth movable end is connected to one end of the first frequency band filter, the other end of the first frequency band filter is used to connect to the antenna, and the other end of the first frequency band transceiver unit is the other end of the first frequency band filter.

7. The radio frequency circuit according to claim 1, wherein: The radio frequency circuit also includes a third frequency band transceiver unit, and the first switch also includes a thirteenth fixed end, the thirteenth fixed end is connected to one end of the third frequency band transceiver unit, and the other end of the third frequency band transceiver unit is used to connect to the antenna.

8. The radio frequency circuit according to claim 1, further comprising a second amplifier, a sixth switch, a fourth frequency band transceiver unit, a seventh switch, and a second coupler, the sixth switch comprising a seventh movable terminal and a plurality of fourteenth fixed terminals, the seventh switch comprising a plurality of fifteenth fixed terminals and a connected eighth movable terminal and a ninth movable terminal, the fourth frequency band transceiver unit comprising a first duplexer module, one side of the first duplexer module comprising a plurality of first transmission ports and a plurality of second transmission ports, and the other side of the first duplexer module comprising a third transmission port; in, The input end of the second amplifier is connected to the RF transceiver, the output end of the second amplifier is connected to the seventh fixed end, each first transmission port is respectively connected to a fourteenth fixed end, and the fourteenth fixed ends connected to the multiple first transmission ports are different, each second transmission port is respectively connected to a receiving port of the corresponding frequency band, the third transmission port is connected to a fifteenth fixed end, the other end of the first frequency band transceiver unit is connected to a fifteenth fixed end, and the other end of the second frequency band transceiver unit is connected to a fifteenth fixed end, and the fifteenth fixed end connected to the other end of the second frequency band transceiver unit is different from the fifteenth fixed end connected to the other end of the first frequency band transceiver unit, and both are different from the fifteenth fixed end connected to the third transmission port, the eighth movable end and the ninth movable end are used to connect to the seventh end of the second coupler, and the eighth end of the second coupler is connected to the antenna.

9. The radio frequency circuit according to claim 1, wherein: The first frequency band transceiver unit includes a B41 frequency band transceiver unit, and the second frequency band transceiver unit includes an N41 frequency band transceiver unit.

10. An electronic device comprising the radio frequency circuit according to any one of claims 1 to 9.