Radio frequency circuit and electronic equipment

Abstract

The invention discloses a radio frequency circuit and electronic equipment, and belongs to the technical field of electronics. The radio frequency circuit comprises a transceiver used for transmitting or receiving a radio frequency signal; the amplifier module is connected with the transceiver and comprises a first amplifier and a second amplifier; the radio frequency antenna is connected with the amplifier module and is used for transmitting or receiving a radio frequency signal; the access switching module is respectively connected with the transceiver, the amplifier module and the radio frequency antenna; in an uplink time period, the path switching module is in a first conduction state, and a radio frequency signal sent by the transceiver is transmitted to the radio frequency antenna through the first amplifier, or the radio frequency signal sent by the transceiver is transmitted to the radio frequency antenna through the first amplifier and the second amplifier; and in a downlink time period, the path switching module is in a second conduction state, and a radio frequency signal received by the radio frequency antenna is transmitted to the transceiver through the first amplifier.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to a radio frequency circuit and an electronic device. Background Technology

[0002] Modern mobile communication duplexing technologies include FDD (Frequency Division Duplexing) and TDD (Time Division Duplexing). In TDD communication, the uplink and downlink share spectrum resources. Through time division, a single frequency band is divided into multiple time slices, allowing uplink and downlink data to be transmitted in different time periods, thus achieving bidirectional communication.

[0003] However, in related technologies, the common radio frequency architecture of TDD communication requires the use of three amplifiers: DA (Drive Amplifier), PA (Power Amplifier), and LNA (Low Noise Amplifier). The large number of amplifiers leads to layout waste and increases hardware costs. Summary of the Invention

[0004] The purpose of this application is to provide a radio frequency (RF) circuit and electronic device that can reduce the number of amplifiers used in the RF circuit, save the layout space occupied by the amplifiers in the RF circuit, and reduce the hardware cost of the RF circuit.

[0005] In a first aspect, embodiments of this application provide a radio frequency (RF) circuit, comprising: a transceiver for transmitting or receiving RF signals; an amplifier module connected to the transceiver for amplifying the RF signals, the amplifier module including a first amplifier and a second amplifier; an RF antenna connected to the amplifier module for transmitting or receiving RF signals; and a path switching module connected to the transceiver, the amplifier module, and the RF antenna, respectively. During uplink periods, the path switching module is in a first conducting state, and the RF signals transmitted by the transceiver are transmitted to the RF antenna through the first amplifier, or the RF signals transmitted by the transceiver are transmitted to the RF antenna through the first amplifier and the second amplifier. During downlink periods, the path switching module is in a second conducting state, and the RF signals received by the RF antenna are transmitted to the transceiver through the first amplifier.

[0006] Secondly, embodiments of this application provide an electronic device, including: a radio frequency circuit as described in the first aspect.

[0007] The radio frequency (RF) circuit provided in this application includes a transceiver, an amplifier module, an RF antenna, and a path switching module. The amplifier module further includes a first amplifier and a second amplifier. The amplifier module is connected to the transceiver, the RF antenna is connected to the amplifier module, and the path switching module is connected to the transceiver, the amplifier module, and the RF antenna, respectively. The transceiver is used to transmit or receive RF signals; the amplifier module is used to amplify the RF signals; and the RF antenna is used to transmit or receive RF signals. During the uplink period, the path switching module is in a first conducting state, and the RF signal transmitted by the transceiver is transmitted to the RF antenna through the first amplifier, or the RF signal transmitted by the transceiver is transmitted to the RF antenna through the first and second amplifiers. During the downlink period, the path switching module is in a second conducting state, and the RF signal received by the RF antenna is transmitted to the transceiver through the first amplifier. Based on the working principle of TDD communication, by switching the conduction state of the path switching module during the uplink and downlink periods, the downlink can reuse the amplifier used in the uplink, achieving bidirectional transmission of RF signals using only two amplifiers. This reduces the number of amplifiers used in the RF circuit, thereby saving layout space occupied by amplifiers in the RF circuit and reducing the hardware cost of the RF circuit. Attached Figure Description

[0008] Figure 1 This is one of the schematic diagrams of the radio frequency circuit provided in the embodiments of this application;

[0009] Figure 2 This is a second schematic diagram of the structure of the radio frequency circuit provided in the embodiments of this application;

[0010] Figure 3 This is a schematic diagram of the structure of a radio frequency circuit in related technologies;

[0011] Figure 4 One of the schematic diagrams of the transmission link provided in the embodiments of this application;

[0012] Figure 5 One of the schematic diagrams of a receiving link provided in an embodiment of this application;

[0013] Figure 6 Source pull diagram of the amplifier provided in the embodiments of this application;

[0014] Figure 7 This is a schematic diagram of the amplifier module provided in the embodiments of this application;

[0015] Figure 8 A second schematic diagram of the transmission link provided in an embodiment of this application;

[0016] Figure 9 The third schematic diagram of the transmission link provided in the embodiments of this application;

[0017] Figure 10 A second schematic diagram of the receiving link provided in an embodiment of this application;

[0018] Figure 11 A structural block diagram of an electronic device provided in an embodiment of this application.

[0019] Figure label:

[0020] 100 RF circuit, 102 transceiver, 104 amplifier module, 106 first amplifier, 108 second amplifier, 110 RF antenna, 112 path switching module, 114 impedance matching module, 116 first impedance matching network, 118 second impedance matching network, 120 first switch, 122 second switch, 124 third switch, 126 power divider, 128 first impedance transformer, 130 second impedance transformer, 132 fourth switch, 134 fifth switch, 136 sixth switch, 138 filter, 200 electronic equipment. Detailed Implementation

[0021] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] The following is combined Figures 1-11 The radio frequency circuits and electronic devices according to embodiments of this application will be described in detail.

[0025] like Figure 1 and Figure 2As shown, this application embodiment provides a radio frequency circuit 100. The radio frequency circuit 100 includes a transceiver 102, an amplifier module 104, a radio frequency antenna 110, and a path switching module 112. The amplifier module 104 further includes a first amplifier 106 and a second amplifier 108.

[0026] The amplifier module 104 is connected to the transceiver 102, the radio frequency antenna 110 is connected to the amplifier module 104, and the path switching module 112 is connected to the transceiver 102, the amplifier module 104, and the radio frequency antenna 110, respectively.

[0027] During the operation of the radio frequency circuit 100, the transceiver 102 is used to transmit or receive radio frequency signals, the amplifier module 104 is used to amplify the radio frequency signals, and the radio frequency antenna 110 is used to transmit or receive radio frequency signals.

[0028] During the uplink period, the path switching module 112 is in the first conduction state, and the radio frequency signal sent by the transceiver 102 is transmitted to the radio frequency antenna 110 through the first amplifier 106, or the radio frequency signal sent by the transceiver 102 is transmitted to the radio frequency antenna 110 through the first amplifier 106 and the second amplifier 108.

[0029] During the downlink period, the path switching module 112 is in the second conduction state, and the radio frequency signal received by the radio frequency antenna 110 is transmitted to the transceiver 102 through the first amplifier 106.

[0030] Understandably, in related technologies, common radio frequency architectures for TDD communication include... Figure 3 As shown in the diagram. The uplink, or transmit link, is as follows: transceiver → amplifier → filter → antenna. Here, the transceiver encodes the digital signal to obtain the radio frequency (RF) signal. The RF signal is amplified by the amplifier, then filtered by the filter, and finally reaches the antenna, from which it is emitted. The downlink, or receive link, is as follows: antenna → filter → LNA → transceiver. Here, the antenna receives the RF signal. The RF signal is filtered to remove out-of-band signals, then amplified by the LNA, and finally reaches the transceiver. The transceiver then decodes the RF signal to recover the digital signal.

[0031] In the transmit link, amplifiers typically consist of two stages: a DA (Digital Amplifier) ​​stage and a PA (Power Amplifier) ​​stage. The DA stage is used to increase signal gain, while the PA stage is used to increase signal power. Thus, in related technologies, the RF architecture uses three amplifiers: a DA stage, a PA stage, and an LNA stage. This results in a large number of amplifiers, leading to layout waste and increased hardware costs.

[0032] Therefore, in the RF circuit 100 provided in this application embodiment, the LNA and DA used in related technologies are combined into one device, and the conduction state of module 112 is switched by switching paths during the uplink and downlink periods, respectively, so that the downlink can reuse the amplifier used in the uplink. In this way, bidirectional transmission of RF signals can be achieved with only two amplifiers, reducing the number of amplifiers used in the RF circuit 100, thereby saving the layout space occupied by the amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0033] According to an embodiment of this application, the radio frequency (RF) circuit 100 includes a transceiver 102, an amplifier module 104, an RF antenna 110, and a path switching module 112. The amplifier module 104 further includes a first amplifier 106 and a second amplifier 108. The amplifier module 104 is connected to the transceiver 102, the RF antenna 110 is connected to the amplifier module 104, and the path switching module 112 is connected to the transceiver 102, the amplifier module 104, and the RF antenna 110. The transceiver 102 is used to transmit or receive RF signals, the amplifier module 104 is used to amplify the RF signals, and the RF antenna 110 is used to transmit or receive RF signals. During the uplink period, the path switching module 112 is in the first conducting state, and the radio frequency signal transmitted by the transceiver 102 is transmitted to the radio frequency antenna 110 through the first amplifier 106, or the radio frequency signal transmitted by the transceiver 102 is transmitted to the radio frequency antenna 110 through the first amplifier 106 and the second amplifier 108. During the downlink period, the path switching module 112 is in the second conducting state, and the radio frequency signal received by the radio frequency antenna 110 is transmitted to the transceiver 102 through the first amplifier 106. Through the above-described radio frequency circuit 100, based on the working principle of TDD communication, by switching the conducting state of the path switching module 112 during the uplink and downlink periods, the downlink can reuse the amplifier used by the uplink, and bidirectional transmission of radio frequency signals can be achieved with only two amplifiers. In this way, the number of amplifiers used in the radio frequency circuit 100 is reduced, thereby saving the layout space occupied by the amplifiers in the radio frequency circuit 100 and reducing the hardware cost of the radio frequency circuit 100.

[0034] According to some embodiments of this application, optionally, such as Figure 1 and Figure 2 As shown, the RF circuit 100 also includes an impedance matching module 114, which in turn includes a first impedance matching network 116 and a second impedance matching network 118.

[0035] Impedance matching module 114 is connected to transceiver 102 and path switching module 112 respectively.

[0036] During the operation of the RF circuit 100, during the uplink period, that is, when the path switching module 112 is in the first conduction state, the RF signal sent by the transceiver 102 is transmitted through the first impedance matching network 116.

[0037] During the downlink period, that is, when the path switching module 112 is in the second conduction state, the radio frequency signal received by the radio frequency antenna 110 is transmitted through the second impedance matching network 118.

[0038] Understandably, to improve the transceiver's transmitting performance, the power and gain of the transmitting link need to be maximized. In this case, the amplifier used in the transmitting link needs to be designed with maximum gain and maximum output power. Conversely, to improve the transceiver's receiving sensitivity, the noise figure of the receiving link needs to be minimized. In this case, the amplifier used in the receiving link needs to be designed with minimum noise figure.

[0039] In practical applications, this can be achieved through methods such as... Figure 6 The source pull diagrams shown are for designing the amplifiers used in the transmit and receive links, respectively. The source pull diagrams are obtained by changing the input matching impedance of the amplifiers and measuring their gain and noise figure. In the source pull diagrams, matching impedances with the same gain are connected together to form equal-gain circles, and matching impedances with the same noise figure are connected together to form equal-noise-figure circles. For example... Figure 6 As shown, the matching impedances corresponding to the maximum gain and the minimum noise figure are different. By adjusting the input matching impedance of the amplifier, the maximum gain or the minimum noise figure can be achieved.

[0040] Based on this, in the RF circuit 100 provided in the embodiments of this application, the matching impedance of the first impedance matching network 116 can be set based on the equal gain circle, and the matching impedance of the second impedance matching network 118 can be set based on the equal noise figure circle.

[0041] In practical applications, the first impedance matching network 116 and the second impedance matching network 118 can specifically adopt a π-type impedance matching network, a T-type impedance matching network or an L-type impedance matching network, without any specific restrictions.

[0042] According to the RF circuit 100 of the embodiments of this application, the RF circuit 100 further includes an impedance matching module 114, which includes a first impedance matching network 116 and a second impedance matching network 118. The impedance matching module 114 is connected to the transceiver 102 and the path switching module 112, respectively. When the path switching module 112 is in a first conducting state, the RF signal transmitted by the transceiver 102 is transmitted through the first impedance matching network 116; when the path switching module 112 is in a second conducting state, the RF signal received by the RF antenna 110 is transmitted through the second impedance matching network 118. In this way, by switching the impedance matching network used by the path switching module 112 during the uplink and downlink periods, the data transmission quality of the uplink and downlink can be guaranteed, and the operating performance of the RF circuit 100 can be improved.

[0043] According to some embodiments of this application, optionally, such as Figure 1 As shown, the path switching module 112 includes a first switch 120, a second switch 122 and a third switch 124.

[0044] The first switch 120 is connected to the radio frequency antenna 110, the second amplifier 108, and the second impedance matching network 118, respectively. The second switch 122 is connected to the first impedance matching network 116, the second impedance matching network 118, and the first amplifier 106, respectively. The third switch 124 is connected to the first amplifier 106, the second amplifier 108, and the transceiver 102, respectively.

[0045] At this time, the second amplifier 108 is a power amplifier (PA), and the first amplifier 106 can be either a digital amplifier (DA) or an amplifier (LNA). When the first amplifier 106 is a DA, the DA can use the same operating voltage as the PA. Under different output power scenarios, the DA and PA can use different voltage parameters to save power and maximize the transceiver's transmission efficiency. When the first amplifier 106 is an LNA, the LNA also uses the PA's power supply, and the LNA's operating voltage only needs to be a constant voltage sufficient for normal LNA operation.

[0046] According to the RF circuit 100 of this application embodiment, the path switching module 112 includes a first switch 120, a second switch 122, and a third switch 124. The first switch 120 is connected to the RF antenna 110, the second amplifier 108, and the second impedance matching network 118, respectively. The second switch 122 is connected to the first impedance matching network 116, the second impedance matching network 118, and the first amplifier 106, respectively. The third switch 124 is connected to the first amplifier 106, the second amplifier 108, and the transceiver 102, respectively. This facilitates the time-division and orderly switching of the conduction state of the path switching module 112 through the coordinated operation of the first switch 120, the second switch 122, and the third switch 124, thereby enabling bidirectional transmission of RF signals using only two amplifiers. This reduces the number of amplifiers used in the RF circuit 100, saving layout space occupied by amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0047] According to some embodiments of this application, optionally, the first switch 120, the second switch 122 and the third switch 124 are all single-pole double-throw switches.

[0048] Based on this, such as Figure 4 As shown, during the uplink period, the first switch 120, the second switch 122 and the third switch 124 work together to transmit the radio frequency signal transmitted by the transceiver 102 to the radio frequency antenna 110 via the first impedance matching network 116, the first amplifier 106 and the second amplifier 108 in sequence.

[0049] Specifically, when the path switching module 112 is in the first conducting state, such as Figure 4 As shown, the common terminal of the second switch 122 is connected to the first terminal of the second switch 122 so that the first impedance matching network 116 is connected to the first amplifier 106. The common terminal of the third switch 124 is connected to the first terminal of the third switch 124 so that the first amplifier 106 is connected to the second amplifier 108. The common terminal of the first switch 120 is connected to the first terminal of the first switch 120 so that the second amplifier 108 is connected to the radio frequency antenna 110.

[0050] At this time, as Figure 4 As shown, the radio frequency signal transmission link is as follows: transceiver 102 → first impedance matching network 116 → second switch 122 → first amplifier 106 → third switch 124 → second amplifier 108 → first switch 120 → radio frequency antenna 110.

[0051] Optionally, such as Figure 5As shown, during the downlink period, the first switch 120, the second switch 122 and the third switch 124 work together to transmit the radio frequency signal received by the radio frequency antenna 110 to the transceiver 102 via the second impedance matching network 118 and the first amplifier 106 in sequence.

[0052] Specifically, when the path switching module 112 is in the second conduction state, such as Figure 5 As shown, the common terminal of the first switch 120 is connected to the second terminal of the first switch 120 so that the radio frequency antenna 110 is connected to the second impedance matching network 118. The common terminal of the second switch 122 is connected to the second terminal of the second switch 122 so that the second impedance matching network 118 is connected to the first amplifier 106. The common terminal of the third switch 124 is connected to the second terminal of the third switch 124 so that the first amplifier 106 is connected to the transceiver 102.

[0053] At this time, as Figure 5 As shown, the radio frequency signal receiving link is: radio frequency antenna 110 → first switch 120 → second impedance matching network 118 → second switch 122 → first amplifier 106 → third switch 124 → transceiver 102.

[0054] According to the RF circuit 100 of this application embodiment, the first switch 120, the second switch 122, and the third switch 124 are all single-pole double-throw switches. When the path switching module 112 is in the first conducting state, the common terminal of the second switch 122 is connected to the first terminal of the second switch 122 to enable the first impedance matching network 116 to conduct with the first amplifier 106, the common terminal of the third switch 124 is connected to the first terminal of the third switch 124 to enable the first amplifier 106 to conduct with the second amplifier 108, and the common terminal of the first switch 120 is connected to the first terminal of the first switch 120. The first switch 108 is connected to the second RF antenna 110. When the path switching module 112 is in the second conducting state, the common terminal of the first switch 120 is connected to the second terminal of the first switch 120 to connect the RF antenna 110 to the second impedance matching network 118. The common terminal of the second switch 122 is connected to the second terminal of the second switch 122 to connect the second impedance matching network 118 to the first amplifier 106. The common terminal of the third switch 124 is connected to the second terminal of the third switch 124 to connect the first amplifier 106 to the transceiver 102. In this way, the time-division and orderly switching of the conducting state of the path switching module 112 is realized. Bidirectional transmission of RF signals can be achieved with only two amplifiers, reducing the number of amplifiers used in the RF circuit 100, thereby saving the layout space occupied by the amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0055] According to some embodiments of this application, optionally, during the uplink period, the first amplifier 106 invokes a first bias parameter to make the first amplifier 106 operate in a maximum gain state.

[0056] During the downlink phase, the first amplifier 106 invokes the second bias parameter to make the first amplifier 106 operate in a minimum noise state.

[0057] In practical applications, the specific value of the first bias parameter can be determined by combining the matching impedance setting of the first impedance matching network 116. By combining the first bias parameter and the first impedance matching network 116, the first amplifier 106 can operate in the maximum gain state, thereby maximizing the power and gain of the transmission link to improve the transmission performance of the transceiver.

[0058] The specific value of the second bias parameter can be determined by combining the matching impedance setting of the second impedance matching network 118. By combining the second bias parameter and the second impedance matching network 118, the first amplifier 106 can operate in a minimum noise state, thereby minimizing the noise figure of the receiving link and improving the receiving sensitivity of the transceiver.

[0059] According to the RF circuit 100 of this application embodiment, during the uplink period, the first amplifier 106 calls a first bias parameter to make the first amplifier 106 operate in the maximum gain state; during the downlink period, the first amplifier 106 calls a second bias parameter to make the first amplifier 106 operate in the minimum noise state. In this way, the first amplifier 106 can call different bias parameters, so that the first amplifier 106 can be used for both the transmit and receive links, which helps to reduce the number of amplifiers used in the RF circuit 100, thereby saving the layout space occupied by the amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0060] According to some embodiments of this application, optionally, such as Figure 2 and Figure 7 As shown, the amplifier module 104 also includes a power divider 126, a first impedance converter 128, and a second impedance converter 130.

[0061] The power divider 126 is connected to the path switching module 112, the first amplifier 106, and the second amplifier 108, respectively.

[0062] Optionally, the power divider 126 is used to split the input RF signal into two paths and transmit them to different amplifier paths respectively.

[0063] The first impedance transformer 128 is connected to the first amplifier 106 and the path switching module 112, respectively, and the second impedance transformer 130 is connected to the path switching module 112 and the second amplifier 108, respectively.

[0064] At this time, both the first amplifier 106 and the second amplifier 108 are PAs.

[0065] During the operation of amplifier module 104, when the signal power of the RF signal input to amplifier module 104 is greater than or equal to a preset power threshold, both the amplifier path containing the first amplifier 106 and the amplifier path containing the second amplifier 108 are in the conducting state. At this time, both the first amplifier 106 and the second amplifier 108 are working to ensure that the RF signal output through amplifier module 104 is not distorted.

[0066] When the signal power of the radio frequency signal is less than the preset power threshold, the amplifier path containing the first amplifier 106 is in the on state, while the amplifier path containing the second amplifier 108 is in the off state. At this time, only the first amplifier 106 works, while the second amplifier 108 stops working.

[0067] In practical applications, those skilled in the art can set the specific value of the above-mentioned preset power threshold according to the actual situation, and no specific restrictions are imposed here.

[0068] According to the RF circuit 100 of this application embodiment, the amplifier module 104 further includes a power divider 126, a first impedance transformer 128, and a second impedance transformer 130. The power divider 126 is connected to the path switching module 112, the first amplifier 106, and the second amplifier 108, respectively. The first impedance transformer 128 is connected to the first amplifier 106 and the path switching module 112, respectively. The second impedance transformer 130 is connected to the path switching module 112 and the second amplifier 108, respectively. When the signal power of the RF signal is greater than or equal to a preset power threshold, both the first amplifier 106 and the second amplifier 108 operate. When the signal power of the RF signal is less than the preset power threshold, the second amplifier 108 stops operating. Thus, based on the difference in signal power between the transmitted and received RF signals, the amplifiers of the transmitting link can be multiplexed in the receiving link of the RF signal, thereby reducing the number of amplifiers used in the RF circuit 100, saving layout space occupied by amplifiers in the RF circuit 100, and reducing the hardware cost of the RF circuit 100.

[0069] According to some embodiments of this application, optionally, such as Figure 2 As shown, the path switching module 112 includes a fourth switch 132, a fifth switch 134, and a sixth switch 136.

[0070] The fourth switch 132 is connected to the radio frequency antenna 110, the second impedance transformer 130, and the second impedance matching network 118, respectively. The fifth switch 134 is connected to the first impedance matching network 116, the second impedance matching network 118, and the power divider 126, respectively. The sixth switch 136 is connected to the first impedance transformer 128, the second amplifier 108, the second impedance transformer 130, and the transceiver 102, respectively.

[0071] According to the RF circuit 100 of this application embodiment, the path switching module 112 includes a fourth switch 132, a fifth switch 134, and a sixth switch 136. The fourth switch 132 is connected to the RF antenna 110, the second impedance transformer 130, and the second impedance matching network 118, respectively. The fifth switch 134 is connected to the first impedance matching network 116, the second impedance matching network 118, and the power divider 126, respectively. The sixth switch 136 is connected to the first impedance transformer 128, the second amplifier 108, the second impedance transformer 130, and the transceiver 102, respectively. This facilitates the time-division and orderly switching of the conduction state of the path switching module 112 through the coordinated operation of the fourth switch 132, the fifth switch 134, and the sixth switch 136, thereby enabling bidirectional transmission of RF signals using only two amplifiers. This reduces the number of amplifiers used in the RF circuit 100, saving layout space occupied by amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0072] According to some embodiments of this application, optionally, the fourth switch 132, the fifth switch 134 and the sixth switch 136 are all single-pole double-throw switches.

[0073] Based on this, such as Figure 8 and Figure 9 As shown, during the uplink period, the fourth switch 132, the fifth switch 134 and the sixth switch 136 work together to transmit the radio frequency signal transmitted by the transceiver 102 to the radio frequency antenna 110 via the first impedance matching network 116 and the amplifier module 104 in sequence.

[0074] Specifically, when the path switching module 112 is in the first conducting state, the common terminal of the fifth switch 134 is connected to the first terminal of the fifth switch 134 to enable the first impedance matching network 116 to conduct with the power divider 126, the common terminal of the sixth switch 136 is connected to the first terminal of the sixth switch 136 to enable the first impedance transformer 128 to conduct with the second impedance transformer 130, and the common terminal of the fourth switch 132 is connected to the first terminal of the fourth switch 132 to enable the second impedance transformer 130 to conduct with the radio frequency antenna 110.

[0075] Based on this, during the uplink period, when the signal power of the radio frequency signal transmitted by transceiver 102 is greater than or equal to a preset power threshold, since both the first amplifier 106 and the second amplifier 108 are operating, at this time, if... Figure 9 As shown, the radio frequency signal transmission link is as follows: transceiver 102 → first impedance matching network 116 → fifth switch 134 → power divider 126 → first amplifier 106, second amplifier 108, first impedance transformer 128, sixth switch 136 → second impedance transformer 130 → fourth switch 132 → radio frequency antenna 110.

[0076] When the signal power of the radio frequency signal transmitted by transceiver 102 is less than a preset power threshold, the second amplifier 108 stops working. At this time, if... Figure 8 As shown, the radio frequency signal transmission link is as follows: transceiver 102 → first impedance matching network 116 → fifth switch 134 → power divider 126 → first amplifier 106 → first impedance transformer 128 → sixth switch 136 → second impedance transformer 130 → fourth switch 132 → radio frequency antenna 110.

[0077] Optionally, such as Figure 10 As shown, during the downlink period, the fourth switch 132, the fifth switch 134 and the sixth switch 136 work together to transmit the radio frequency signal received by the radio frequency antenna 110 to the transceiver 102 via the second impedance matching network 118 and the amplifier module 104 in sequence.

[0078] Specifically, when the path switching module 112 is in the second conduction state, the common terminal of the fourth switch 132 is connected to the second terminal of the fourth switch 132 to enable the radio frequency antenna 110 to conduct with the second impedance matching network 118, the common terminal of the fifth switch 134 is connected to the second terminal of the fifth switch 134 to enable the second impedance matching network 118 to conduct with the power divider 126, and the common terminal of the sixth switch 136 is connected to the second terminal of the sixth switch 136 to enable the first impedance converter 128 to conduct with the transceiver 102.

[0079] Based on this, it can be understood that if the signal power of the radio frequency signal received by the radio frequency antenna 110 is less than a preset power threshold, the second amplifier 108 will stop working when the radio frequency signal passes through the amplifier module 104. At this time, if... Figure 10 As shown, the radio frequency signal receiving link is: radio frequency antenna 110 → fourth switch 132 → second impedance matching network 118 → fifth switch 134 → power divider 126 → first amplifier 106 → first impedance converter 128 → sixth switch 136 → transceiver 102.

[0080] According to the RF circuit 100 of this application embodiment, the fourth switch 132, the fifth switch 134, and the sixth switch 136 are all single-pole double-throw switches. When the path switching module 112 is in the first conducting state, the common terminal of the fifth switch 134 is connected to the first terminal of the fifth switch 134 to enable the first impedance matching network 116 to conduct with the power divider 126, the common terminal of the sixth switch 136 is connected to the first terminal of the sixth switch 136 to enable the first impedance transformer 128 to conduct with the second impedance transformer 130, and the common terminal of the fourth switch 132 is connected to the first terminal of the fourth switch 132. The first impedance transformer 128 is connected to the transceiver 102 so that the second impedance transformer 130 is connected to the RF antenna 110. When the path switching module 112 is in the second conducting state, the common terminal of the fourth switch 132 is connected to the second terminal of the fourth switch 132 so that the RF antenna 110 is connected to the second impedance matching network 118. The common terminal of the fifth switch 134 is connected to the second terminal of the fifth switch 134 so that the second impedance matching network 118 is connected to the power divider 126. The common terminal of the sixth switch 136 is connected to the second terminal of the sixth switch 136 so that the first impedance transformer 128 is connected to the transceiver 102. In this way, the conducting state of the path switching module 112 is switched in a time-division and orderly manner. Bidirectional transmission of RF signals can be achieved with only two amplifiers, reducing the number of amplifiers used in the RF circuit 100, thereby saving the layout space occupied by the amplifiers in the RF circuit 100 and reducing the hardware cost of the RF circuit 100.

[0081] According to some embodiments of this application, optionally, such as Figure 1 and Figure 2 As shown, the radio frequency circuit 100 also includes a filter 138.

[0082] The filter 138 is connected between the path switching module 112 and the radio frequency antenna 110.

[0083] During the operation of the radio frequency antenna 110, the filter 138 is used to filter the radio frequency signal to be transmitted or received by the radio frequency antenna 110.

[0084] The radio frequency circuit 100 according to an embodiment of this application further includes a filter 138. The filter 138 is connected between the path switching module 112 and the radio frequency antenna 110. The filter 138 is used to filter the radio frequency signal to be transmitted or received by the radio frequency antenna 110. In this way, the radio frequency signal is filtered before being transmitted externally or internally, improving the transmission and reception quality of the radio frequency signal and reducing the impact of external interference on the circuit.

[0085] According to some embodiments of this application, optionally, such as Figure 11As shown, this application embodiment also provides an electronic device 200. The electronic device 200 includes the radio frequency circuit 100 in any of the above embodiments. The electronic device 200 provided in this application embodiment includes the radio frequency circuit 100 in any of the above embodiments and can achieve the same technical effect; therefore, to avoid repetition, it will not be described again here.

[0086] It should be noted that the electronic device 200 in the embodiments of this application includes mobile electronic devices and non-mobile electronic devices.

[0087] In practical applications, the electronic device 200 can be a terminal or other devices besides a terminal. For example, the electronic device 200 can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. The embodiments of this application do not specifically limit it.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A radio frequency circuit, characterized by The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module.

2. The radio frequency circuit of claim 1, wherein, The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module.

3. The radio frequency circuit of claim 2, wherein, The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module.

4. The radio frequency circuit of claim 3, wherein, The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module.

5. The radio-frequency circuit of claim 1, wherein The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. The application relates to a transceiver module. 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The radio frequency circuit of claim 2, wherein, The amplifier module further comprises: a power divider connected with the path switching module, the first amplifier and the second amplifier respectively; a first impedance transformer connected with the first amplifier and the path switching module respectively; a second impedance transformer connected with the path switching module and the second amplifier respectively; wherein, in the case that the signal power of the radio frequency signal is greater than or equal to a preset power threshold, the first amplifier and the second amplifier both work, and in the case that the signal power of the radio frequency signal is less than the preset power threshold, the second amplifier stops working.

7. The radio frequency circuit of claim 6, wherein, The path switching module comprises: a fourth switch connected with the radio frequency antenna, the second impedance transformer and the second impedance matching network respectively; a fifth switch connected with the first impedance matching network, the second impedance matching network and the power divider respectively; a sixth switch connected with the first impedance transformer, the second amplifier, the second impedance transformer and the transceiver respectively.

8. The radio frequency circuit of claim 7, wherein, The fourth switch, the fifth switch and the sixth switch are all single-pole double-throw switches; in the case that the path switching module is in the first conduction state, the common terminal of the fifth switch is connected with the first terminal of the fifth switch to make the first impedance matching network conduct with the power divider, the common terminal of the sixth switch is connected with the first terminal of the sixth switch to make the first impedance transformer conduct with the second impedance transformer, and the common terminal of the fourth switch is connected with the first terminal of the fourth switch to make the second impedance transformer conduct with the radio frequency antenna; in the case that the path switching module is in the second conduction state, the common terminal of the fourth switch is connected with the second terminal of the fourth switch to make the radio frequency antenna conduct with the second impedance matching network, the common terminal of the fifth switch is connected with the second terminal of the fifth switch to make the second impedance matching network conduct with the power divider, and the common terminal of the sixth switch is connected with the second terminal of the sixth switch to make the first impedance transformer conduct with the transceiver.

9. The radio frequency circuit of any one of claims 1 to 8, wherein, Further comprising: a filter connected between the path switching module and the radio frequency antenna, for filtering the radio frequency signal to be transmitted or received by the radio frequency antenna.

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

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