Radio frequency front-end module and electronic device

Abstract

The embodiment of the application discloses a radio frequency front end module and electronic equipment, through multiplexing the filter inside the radio frequency front end module, the radio frequency front end module can process the radio frequency signal from the single-frequency antenna or the radio frequency signal from the multi-frequency antenna through the filter, and the external filter can be saved under the demand of the antenna disassembly scheme.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a radio frequency front-end module and electronic device. Background Technology

[0002] With the rapid development of wireless communication technology, the demand for higher data transmission rates and more reliable communication connections is becoming increasingly urgent. Antennas, as an important component of wireless communication systems, play a crucial role in receiving and transmitting wireless signals.

[0003] The antenna design of terminal equipment is greatly influenced by the product's appearance and specifications. Specifically, the design of the RF front-end module and middle-high band (MHB) antenna in the terminal equipment can be based on product requirements, choosing between a combined antenna or a separate antenna design. A combined antenna design uses a single multi-frequency antenna to receive and transmit signals across all frequency bands, suitable for communication scenarios with varying frequencies, but it also increases design complexity and current loss, and reduces transmit power and receive sensitivity. A separate antenna design, in addition to using a multi-frequency antenna for receiving and transmitting signals, adds a single-frequency antenna to receive and transmit signals in a specific frequency band, suitable for communication scenarios with fixed frequencies, and can improve transmit power and receive sensitivity while reducing design complexity and current loss.

[0004] Currently, the antenna removal solution requires the addition of an external filter to work with the single-frequency antenna, which increases hardware resources. Summary of the Invention

[0005] This application provides a radio frequency front-end module and electronic device. By reusing the filter inside the radio frequency front-end module, the radio frequency front-end module can process radio frequency signals from a single-frequency antenna or from a multi-frequency antenna through the filter, which can save external filters when antenna removal is required.

[0006] In a first aspect, embodiments of this application provide a radio frequency (RF) front-end module, which includes an antenna switching switch, a single-pole double-throw (SPD) switch, a first filter, and a second filter; the first filter and the second filter each correspond to a filtering frequency band; the antenna switching switch is connected to a first antenna, and the SPD switch is connected to a second antenna; the antenna switching switch is used to select the RF signal received by the first antenna to the SPD switch and / or the second filter; the SPD switch is used to select the RF signal received by the first antenna and the antenna switching switch or the RF signal received by the second antenna to the first filter.

[0007] This application embodiment adds a single-pole double-throw switch to the RF front-end module to select the RF signal received by the first antenna and the antenna switching switch, or the RF signal received by the second antenna, to the first filter. The RF front-end module realizes filter multiplexing, which can save external filters when antenna removal is required, reduce the space occupied by hardware resources, and reduce the cost of hardware resources.

[0008] In conjunction with the first aspect, in one possible implementation, the first terminal of the single-pole double-throw switch is connected to the first output terminal of the antenna switching switch; the second terminal of the single-pole double-throw switch is connected to the second antenna; and the common terminal of the single-pole double-throw switch is connected to the first filter.

[0009] In conjunction with the first aspect, in one possible implementation, the input terminal of the antenna switching switch is connected to the first antenna; the first output terminal of the antenna switching switch is connected to the first terminal of the single-pole double-throw switch; and the second output terminal of the antenna switching switch is connected to the second filter.

[0010] In conjunction with the first aspect, in one possible implementation, the RF front-end module further includes a first amplification module and a second amplification module; the first amplification module is used to amplify the RF signal output by the first filter, and the second amplification module is used to amplify the RF signal output by the second filter.

[0011] In conjunction with the first aspect, in one possible implementation, the RF front-end module further includes a third filter, the third filter, the first filter, and the second filter all having different filtering frequency bands; the third filter is connected to an antenna switching switch.

[0012] In conjunction with the first aspect, in one possible implementation, the antenna switching switch is specifically used to transmit the radio frequency signal received by the first antenna to at least one of the single-pole double-throw switch, the second filter, and the third filter.

[0013] In conjunction with the first aspect, in one possible implementation, the RF front-end module further includes a matching network for impedance matching between the first antenna or the second antenna and the RF front-end module.

[0014] Secondly, embodiments of this application provide a radio frequency front-end module, which includes an antenna switching switch, a first filter, and a second filter; the first filter and the second filter each correspond to a filtering frequency band; the antenna switching switch is connected to a first antenna and a second antenna; the antenna switching switch is used to conduct the radio frequency signal of the second antenna to the first filter, or to conduct the radio frequency signal of the first antenna to the first filter and / or the second filter.

[0015] In this embodiment, the antenna switching switch is connected to both the first and second antennas. This allows the RF signal from the second antenna to be routed to the first filter, or vice versa. By reusing filters within the RF front-end module, this embodiment saves on external filters required for antenna removal, reducing hardware space requirements and costs.

[0016] In conjunction with the second aspect, in one possible implementation, the antenna switching switch is also used to simultaneously connect the radio frequency signal of the second antenna to the first filter and the radio frequency signal of the first antenna to the second filter.

[0017] In conjunction with the second aspect, in one possible implementation, the antenna switching switch includes a single-pole single-throw switch, a first switching transistor, and a second switching transistor; the single-pole single-throw switch is located between the second antenna and the first filter, the first switching transistor is located between the first antenna and the first filter, and the second switching transistor is located between the first antenna and the second filter.

[0018] In conjunction with the second aspect, in one possible implementation, the first switching transistor is disconnected when the single-pole single-throw switch is turned on; the single-pole single-throw switch is disconnected when the first switching transistor is turned on.

[0019] In this embodiment, during the antenna combining scheme, the first and / or second switches in the RF front-end module are turned on, while the single-pole single-throw switch is turned off. At this time, the RF signal from the first antenna does not pass through the single-pole single-throw switch. Therefore, in the antenna combining scheme, the single-pole single-throw switch does not cause additional losses and does not affect the performance of the antenna combining scheme.

[0020] In the above embodiment, the single-pole single-throw switch and the first switching transistor are respectively the switches from the second antenna and the first antenna to the first filter. The single-pole single-throw switch and the first switch cannot be turned on simultaneously, that is, the RF front-end module cannot simultaneously receive RF signals from the first antenna and the second antenna to the same filter.

[0021] In conjunction with the second aspect, in one possible implementation, the antenna switching switch further includes a third switch and a fourth switch; the first terminal of the third switch is connected between the first switch and the first filter, and the second terminal of the third switch is grounded; the first terminal of the fourth switch is connected between the second switch and the second filter, and the second terminal of the fourth switch is grounded.

[0022] In the above embodiments, the third and fourth switches are used to improve the isolation between different receiving channels and reduce signal interference from other receiving channels.

[0023] In conjunction with the second aspect, in one possible implementation, the radio frequency front end may include a first amplification module and a second amplification module; the first amplification module is used to amplify the radio frequency signal output by the first filter, and the second amplification module is used to amplify the radio frequency signal output by the second filter.

[0024] Thirdly, embodiments of this application provide an electronic device, which includes the first aspect or the second aspect, and a radio frequency front-end module in any possible implementation of the first aspect or the second aspect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1A This is a circuit example diagram of a radio frequency front-end module provided in an embodiment of this application;

[0027] Figure 1B This is a circuit example diagram of a radio frequency front-end module provided in an embodiment of this application;

[0028] Figure 2 This is a structural example diagram of a radio frequency front-end module provided in an embodiment of this application;

[0029] Figure 3 This is a circuit example diagram of a radio frequency front-end module provided in an embodiment of this application;

[0030] Figure 4 This is a structural example diagram of another radio frequency front-end module provided in the embodiments of this application;

[0031] Figure 5 This is a circuit example diagram of another radio frequency front-end module provided in the embodiments of this application;

[0032] Figure 6 This is a structural example diagram of a wireless communication system provided in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of a wireless communication module in a mobile phone provided in an embodiment of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] To facilitate the description of the RF front-end module embodiments of this application, the technical terms are explained below.

[0036] 1. A radio frequency front-end module (RF front-end module) is used to process radio frequency signals, converting wireless signals received from the antenna into digital signals for subsequent digital processing and communication functions. In this embodiment, the RF front-end module may also be referred to as an RF front-end circuit.

[0037] 2. Antenna (ANT): Used to receive radio frequency signals from the wireless channel during reception and to radiate radio frequency signals into the wireless channel during transmission.

[0038] 3. An antenna switch (ASW) is connected between the antenna and the signal processing module to control the conduction or deactivation of one or more signal paths from the antenna to the signal processing module. For example, the ASW can be a multi-pole multi-throw switch (MPLS) to switch between different signal paths, including switching between reception and transmission, and switching between different frequency bands. In this embodiment, the antenna switch can also be referred to as an antenna selection switch module.

[0039] 4. Low noise amplifier (LNA): Its main function is to amplify the power of the received radio frequency signal, reduce the noise figure of the radio frequency signal receiving path, and improve the receiving sensitivity. In the embodiments of this application, the low noise amplifier can also be referred to as an amplification module.

[0040] The radio frequency (RF) signal receiving path refers to the route used to receive RF signals in the RF front-end module. It can include multiple stages, from antenna switching switches to filters and amplification modules, to complete the reception and processing of RF signals. In this embodiment, the RF signal receiving path can also be referred to as the receiving path.

[0041] 5. A filter is used to remove specific frequency components from a radio frequency signal to obtain a signal of a specific frequency.

[0042] In this embodiment of the application, filters corresponding to different frequency bands can filter the radio frequency signals received by the antenna to obtain radio frequency signals corresponding to different frequency bands.

[0043] For example, the radio frequency signals received by the antenna may include signals from the B1 band, B3 band, B7 band, B39 band, B40 band, and B41 band; the filter corresponding to the B41 band is used to filter out signals other than the B41 band to obtain the B41 band signal.

[0044] In this embodiment of the application, for ease of description, the signal in the Bn frequency band is simply referred to as the Bn signal, such as the signal in the B41 frequency band being simply referred to as the B41 signal; the filter corresponding to the Bn frequency band is simply referred to as the Bn filter, such as the filter corresponding to the B41 frequency band being simply referred to as the B41 filter. Wherein, Bn can be B1, B3, B7, B39, B40, and B41, etc., and this embodiment of the application does not limit this.

[0045] 6. Single pole single throw (SPST) switch controls the on or off of the radio frequency signal path; when the SPST switch is in the open state, the two connection points are connected; when it is in the closed state, the two connection points are disconnected.

[0046] 7. Single pole double throw (SPDT) switch: two inputs and one output, or one input and two outputs. Its function is to select one of the two paths of the radio frequency signal.

[0047] First, through Figure 1A An exemplary antenna scheme is described. This antenna scheme can transmit and receive signals in six frequency bands (B1 / B3 / B7 / B39 / B40 / B41) on a single antenna (i.e., the first antenna).

[0048] The combined antenna scheme includes a first antenna (referred to as ANT1) and an RF front-end module 10. ANT1 is connected to the RF front-end module 10 via the ANT1_IN port of the RF front-end module 10. The RF front-end module 10 may include an antenna selection switch module 101, a filter module 102, and an amplifier module 103, and may also include several switches.

[0049] The filter module 102 may include filters corresponding to six frequency bands, namely filter B1, filter B3, filter B7, filter B39, filter B40A, and filter B41; the amplifier module 103 may include four amplification modules, namely the first amplification module (LNA1), the second amplification module (LNA2), the third amplification module (LNA3), and the fourth amplification module (LNA4). It should be noted that... Figure 1AThe example uses blank rectangles to represent three switches: the switch connected to LNA1, the switch connected to LNA3, and the switch connected to LNA4.

[0050] In one implementation, the RF front-end module 10 can switch the receiving path of the first antenna via the antenna selection switch module 101 to support various frequency bands.

[0051] like Figure 1A As shown, the receiving paths for the six frequency bands are similar. All signals enter the RF front-end module 10 from ANT1 via the input port ANT_IN. After the antenna selection switch module 101 of the RF front-end module 10 selects the filter 102 corresponding to the receiving path, the signals then enter the amplifier module 103 to achieve RF signal reception. It should be noted that the aforementioned RF front-end module 10 may also include a matching network, etc.; the reception of the aforementioned B3, B7, B39, B40, and B41 signals also involves a closed switch (such as...). Figure 1A (as shown in the blank rectangle in the image), etc.

[0052] like Figure 1A As shown, the RF front-end module 10 may further include an input port B40_AUX. The input port B40_AUX and the B40 filter A (a component in the receiving path of the B40 filter A) are connected to the same switch (referred to as the B40 switch). The input port B40_AUX can be used to receive single-frequency B40 signals by connecting to a single-frequency antenna and an external B40 filter (which may be referred to as B40 filter B to distinguish it from B40 filter A).

[0053] Next, we will use the example of receiving the B40 signal through a separate antenna to illustrate the antenna removal solution. Figure 1B As shown, the second antenna (referred to as ANT2) is connected to the B40 filter B, and the B40 filter B is connected to the B40 switch through the input port B40_AUX.

[0054] It should be noted that the embodiments of this application use B40 as an example for illustration. In other embodiments, radio frequency signals of other frequency bands can also be separated and received through a separate antenna. The embodiments of this application do not limit the frequency band of the separated radio frequency signals.

[0055] like Figure 1B As shown, path A is an example of the B40 signal reception path (Path A for short) in the antenna-combined scheme. The reception paths other than B40 are similar to Path A. Path B is an example of the B40 signal reception path (Path B for short) in the antenna-disconnected scheme.

[0056] For the combined antenna scheme, as shown in route A, the B40 signal enters the ANT port of the RF front-end module 10 from ANT1. After the antenna selection switch module 101 in the RF front-end module 10 selects the filter 102 corresponding to the receiving path, it enters the amplifier module 103, thereby realizing the reception of the RF signal.

[0057] For the antenna removal scheme, since ANT2 is an independent antenna, the receiving path is as shown in route B. The B40 signal enters the B40 filter B from ANT2, and then enters the input port B40_AUX of the RF front-end module 10. The RF signal is received through the LNA1 in the RF front-end module 10.

[0058] It should be noted that, Figure 1B The ANT1 shown is a multi-frequency antenna, and the ANT2 is a single-frequency antenna.

[0059] In the antenna removal scheme, when using ANT2 to receive the B40 RF signal alone, an additional external B40 filter B is required. At this time, the B40 filter A inside the RF front-end module 10 is idle, resulting in a waste of resources.

[0060] In view of this, the embodiments of this application realize the reuse of filters by merging the receiving path of the single-frequency antenna with the receiving path used by the multi-frequency antenna, which can reduce the space occupied by hardware resources and reduce the cost of hardware resources.

[0061] The RF front-end module provided in this application is suitable for terminal devices (such as mobile phones and tablets) that use antenna splitting and antenna combining schemes for wireless communication.

[0062] The following is through Figures 2 to 4 The radio frequency front-end module provided in the embodiments of this application is described by way of example.

[0063] Figure 2 This is a schematic diagram of the structure of a radio frequency (RF) front-end module 20 provided in an embodiment of this application. The RF front-end module 20 is coupled to a first antenna (ANT1) and a second antenna (ANT2) to receive RF signals. After processing the received RF signals, it sends them to the next-level conversion circuit (such as...). Figure 2 An exemplary radio frequency transceiver module is shown.

[0064] like Figure 2 As shown, the RF front-end module 20 may include an antenna switching switch 201, a single-pole double-throw switch 202, a first filter 203, a second filter 204, a first amplification module 205, and a second amplification module 206. Wherein:

[0065] Antenna switch 201 can be used to select the receiving path from ANT1 to single-pole double-throw switch 202 and / or from ANT1 to second filter 204. The first input port of antenna switch 201 is connected to ANT1, the first output terminal Rx1 of antenna switch 201 is connected to the first terminal (also called contact a1) of single-pole double-throw switch 202, and the second output terminal Rx2 of antenna switch 201 is connected to the first terminal of second filter 204.

[0066] The single-pole double-throw switch 202 can be used to select either the receiving path from ANT2 to the first filter 203 (referred to as the first path) or the receiving path from the antenna switch 201 to the first filter 203 (referred to as the second path). The first terminal of the single-pole double-throw switch 202 is connected to the first output terminal Rx1 of the antenna switch 201, the second terminal of the single-pole double-throw switch 202 (also referred to as contact a2) is connected to ANT2, and the common terminal of the single-pole double-throw switch 202 is connected to the first terminal of the first filter 203.

[0067] In some embodiments, when the single-pole double-throw switch 202 is switched to contact a1, the single-pole double-throw switch 202 turns on the receiving path from the antenna switching switch 201 to the first filter 203; when the single-pole double-throw switch 202 is switched to contact a2, the single-pole double-throw switch 202 turns on the receiving path from ANT2 to the first filter 203.

[0068] It should be noted that at any given time, the single-pole double-throw switch 202 can only conduct one of the first and second paths.

[0069] The first filter 203 is a filter corresponding to the first radio frequency signal. The first filter 203 can be used to filter out signals other than the first radio frequency signal. The first end of the first filter 203 is connected to the common end of the single-pole double-throw switch 202, and the second end of the first filter 203 is connected to the first end of the first amplification module 205.

[0070] The second filter 204 is a filter corresponding to the second radio frequency signal. The second filter 204 can be used to filter out signals other than the second radio frequency signal. The first terminal of the second filter 204 is connected to the second output terminal Rx2 of the antenna switching switch 201, and the second terminal of the second filter 204 is connected to the first terminal of the second amplification module 206. The frequency bands of the aforementioned first radio frequency signal and the aforementioned second radio frequency signal are different.

[0071] The first amplification module 205 and the second amplification module 206 can be used to amplify the received radio frequency (RF) signal. The first terminal of the first amplification module 205 is connected to the second terminal of the first filter 203, and the second terminal of the first amplification module 205 is connected to the RF transceiver module. The first terminal of the second amplification module 206 is connected to the second terminal of the second filter 204, and the second terminal of the second amplification module 206 is connected to the RF transceiver module. Both the first amplification module 205 and the second amplification module 206 can be low-noise amplifiers.

[0072] In one implementation, when the RF front-end module 20 uses a combined antenna scheme to receive the target RF signal, the antenna switching switch 201 and the single-pole double-throw switch 202 within the RF front-end module 20 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when the ANT1 receives the RF signal and enters the RF front-end module 20, it is filtered by the target filter to obtain the target RF signal. Furthermore, the target RF signal is amplified by the amplification module connected to the target filter to obtain the amplified RF signal. Finally, the amplified RF signal enters the RF transceiver module, thereby realizing the reception of the target RF signal. The target RF signal can be the aforementioned first RF signal and / or the aforementioned second RF signal.

[0073] For example, when the RF front-end module 20 receives the first RF signal using a combined antenna scheme, the receiving path from ANT1 to the first output terminal Rx1 in the antenna switching switch 201 is turned on, and the single-pole double-throw switch 202 is switched to contact a1; the RF signal received by ANT1 enters the first filter 203 through the antenna switching switch 201 and the single-pole double-throw switch 202, and the first filter 203 filters the received RF signal to obtain the first RF signal; the first RF signal is amplified by the first amplification module 205 and then enters the RF transceiver module.

[0074] For example, when the RF front-end module 20 uses a combined antenna scheme to receive the second RF signal, the receiving path from ANT1 to the second output terminal Rx2 in the antenna switching switch 201 is turned on; the RF signal received by ANT1 enters the second filter 204 through the antenna switching switch 201, and the second filter 204 filters the received RF signal to obtain the second RF signal; the second RF signal is amplified by the second amplification module 206 and then enters the RF transceiver module.

[0075] In another implementation, when the RF front-end module 20 uses the antenna-splitting scheme to receive signals, the antenna switching switch 201 and the single-pole double-throw switch 202 inside the RF front-end module 20 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when the ANT2 receives the RF signal and enters the RF front-end module 20, it is filtered by the target filter to obtain the target RF signal. Then, the target RF signal is amplified by the amplification module connected to the target filter to obtain the amplified RF signal. Finally, the amplified RF signal enters the RF transceiver module, thereby realizing the reception of the target RF signal.

[0076] For example, when the RF front-end module 20 receives the first RF signal using the antenna-removal scheme, the receiving path from ANT1 to the first output terminal Rx1 in the antenna switching switch 201 is turned off, and the single-pole double-throw switch 202 switches to contact a2; the RF signal received by ANT2 enters the first filter 203 through the single-pole double-throw switch 202, and the first filter 203 filters the received RF signal to obtain the first RF signal; the first RF signal is amplified by the first amplification module 205 and then enters the RF transceiver module. It should be noted that... Figure 2 As shown, ANT1 can be a multi-frequency antenna, and ANT2 can be a single-frequency antenna. The receiving path connected to the single-frequency antenna can select the receiving antenna by switching the antenna switching switch 201 and the single-pole double-throw switch 202, that is, to select the antenna removal scheme or the antenna combination scheme to receive radio frequency signals.

[0077] It should be noted that the number of second antennas is not limited to one. That is, signals from multiple frequency bands can be received through separate antennas. This embodiment only illustrates the example of splitting a signal from one frequency band. The number of first antennas is also not limited to one, and the input port of the antenna switch is not limited to one. That is, multiple antenna switch input ports can be used to receive radio frequency signals. This embodiment only illustrates the example of one antenna switch input port.

[0078] The number of devices such as RF channels, switches, antennas, filters, and low-noise amplifiers in the embodiments of this application is only illustrative. The actual number of devices may be one or more, or there may be no such device. This application does not limit these numbers. It should be noted that... Figure 2 The RF front-end module 20 shown may also include a matching network, which may include one or more passive components, such as inductors or capacitors. The matching network is used to achieve impedance matching between the antenna and the RF front-end module 20 to ensure maximum power delivery and minimum signal reflection. The inductor can be implemented using a wire-wound inductor, a substrate inductor, or an on-chip inductor; the capacitor can be implemented using a ceramic capacitor, a substrate capacitor, or an on-chip capacitor.

[0079] The RF front-end module 20 provided in this application embodiment does not require the use of an external filter when using the antenna removal scheme, thus reducing manufacturing costs.

[0080] Next, an example will be provided. Figure 3 right Figure 2 A detailed introduction to the radio frequency front-end module is provided.

[0081] like Figure 3 As shown, Figure 3 This is an example diagram of a radio frequency (RF) front-end module 30 provided in an embodiment of this application. The RF front-end module 30 is coupled to ANT1 and ANT2. The RF front-end module 30 can receive RF signals from ANT1 through the first input port ANT1_IN, and the RF front-end module 30 can receive RF signals from ANT2 through the second input port ANT2_IN.

[0082] The RF front-end module 30 may include an antenna switching switch 301, a single-pole double-throw switch (SPDT), a first switch Q1, a second switch Q2, a filter module 302, and an amplifier module 303. The filter module 302 may include a B40 filter, a B1 filter, a B3 filter, a B7 filter, a B39 filter, and a B41 filter; the amplifier module 303 may include a first amplification module (LNA1), a second amplification module (LNA2), a third amplification module (LNA3), and a fourth amplification module (LNA4).

[0083] The antenna switching switch 301 may include one input terminal and six output terminals, namely, the first output terminal Rx1, the second output terminal Rx2, the third output terminal Rx3, the fourth output terminal Rx4, the fifth output terminal Rx5, and the sixth output terminal Rx6. The input terminal of the antenna switching switch 301 serves as the first input port ANT1_IN of the RF front-end module 30 and is connected to ANT1. The first output terminal Rx1 is connected to the first terminal (also called contact a1) of the single-pole double-throw switch SPDT. The second output terminal Rx2, the third output terminal Rx3, the fourth output terminal Rx4, the fifth output terminal Rx5, and the sixth output terminal Rx6 are respectively connected to the first terminals of filters B1, B3, B7, B39, and B41.

[0084] Antenna switching switch 301 can be used to output the radio frequency signal received by ANT1 from at least one of the six output terminals. For example... Figure 3 As shown, the antenna switching switch 301 can be used to turn on the radio frequency signal received by ANT1 to at least one of the single-pole double-throw switch SPDT, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter.

[0085] The single-pole double-throw (SPDT) switch can be used to connect the receiving path of the ANT2 to the B40 filter or the receiving path of the antenna switching switch 301 to the B40 filter. The first terminal of the SPDT is connected to the first output terminal Rx1, the second terminal of the SPDT (also called contact a2) serves as the second input port ANT2_IN of the RF front-end module 30 and is connected to ANT2, and the common terminal of the SPDT is connected to the first terminal of the B40 filter.

[0086] When the single-pole double-throw switch SPDT is switched to contact a1, the single-pole double-throw switch SPDT turns on the receiving path from antenna switching switch 301 to filter B40; when the single-pole double-throw switch SPDT is switched to contact a2, the single-pole double-throw switch SPDT turns on the receiving path from ANT2 to filter B40.

[0087] The first terminal of filter B40 is connected to the common terminal of the single-pole double-throw switch (SPDT), and the second terminal of filter B40 is connected to the first terminal of LNA1. The first terminal of filter B1 is connected to the second output terminal Rx2, and the second terminal of filter B1 is connected to the first terminal of LNA2. The first terminal of filter B3 is connected to the third output terminal Rx3, and the second terminal of filter B3 is connected to the first terminal (also called contact b1) of the first switch Q1. The first terminal of filter B7 is connected to the fourth output terminal Rx4, and the second terminal of filter B7 is connected to the first terminal (also called contact c1) of the second switch Q2. The first terminal of filter B39 is connected to the fifth output terminal Rx5, and the second terminal of filter B39 is connected to the second terminal (also called contact b2) of the first switch Q1. The first terminal of filter B41 is connected to the sixth output terminal Rx6, and the second terminal of filter B41 is connected to the second terminal (also called contact c2) of the second switch Q2.

[0088] Filters B40, B1, B3, B7, B39, and B41 are the corresponding filters for signals B40, B1, B3, B7, B39, and B41, respectively. Filters B40, B1, B3, B7, B39, and B41 can be used to filter signals other than B40, B1, B3, B7, B39, and B41, respectively.

[0089] The first switch Q1 can be used to turn on the receiving path from the B3 filter to the LNA3 or the B39 filter to the LNA3. The first terminal of the first switch Q1 is connected to the second terminal of the B3 filter, the second terminal of the first switch Q1 is connected to the second terminal of the B39 filter, and the common terminal of the first switch Q1 is connected to the first terminal of the LNA3; for example, the first switch Q1 can be a single-pole double-throw switch.

[0090] When the first switch Q1 is switched to contact b1, the first switch Q1 turns on the receiving path from the B3 filter to the LNA3; when the first switch Q1 is switched to contact b2, the first switch Q1 turns on the receiving path from the B39 filter to the LNA3.

[0091] The second switch Q2 can be used to turn on the receiving path from the B7 filter to the LNA4 or the B41 filter to the LNA4. The first terminal of the second switch Q2 is connected to the second terminal of the B7 filter, the second terminal of the second switch Q2 is connected to the second terminal of the B41 filter, and the common terminal of the second switch Q2 is connected to the first terminal of the LNA4; for example, the first switch Q1 can be a single-pole double-throw switch.

[0092] When the second switch Q2 is switched to contact c1, the second switch Q2 turns on the receiving path from the B7 filter to the LNA4; when the first switch Q1 is switched to contact c2, the second switch Q2 turns on the receiving path from the B41 filter to the LNA4.

[0093] The second terminals of LNA1, LNA2, LNA3, and LNA4 are connected to the RF transceiver module and can be used to amplify the received RF signal. LNA1, LNA2, LNA3, and LNA4 are low-noise amplifiers and can process RF signals simultaneously.

[0094] It should be noted that, Figure 3 As shown, ANT1 can be a multi-frequency antenna, and ANT2 can be a single-frequency antenna. The radio frequency signal received by ANT1 can include signals from any of the following frequency bands: B1, B3, B7, B39, B40, and B41. The radio frequency signal received by ANT2 can include signals from the B40 frequency band (referred to as B40 signal).

[0095] The RF front-end module 30 can simultaneously receive multiple RF signals. The RF front-end module 30 can choose to use either a combined antenna scheme or a split antenna scheme to receive the B40 signal, and use the combined antenna scheme to receive other RF signals. This embodiment exemplifies the split antenna scheme for B40; in other embodiments, one or more other frequency band RF signals can be separated and received through individual antennas.

[0096] It should be understood that for a specific frequency band, antenna removal and antenna combination are mutually exclusive. However, for different frequency bands, antenna removal and antenna combination can be used separately. For example, for frequency band B32, the product also involves the issue of antenna removal or combination. The product can be any combination of: B32 antenna combination + B40 antenna removal, B32 antenna combination + B40 antenna combination, or B32 antenna removal + B40 antenna removal.

[0097] For example, the RF front-end module 30 can use a combined antenna scheme to receive the B40 signal, B1 signal, and B39 signal. In this case, the antenna switching switch 301 can connect the path from the first input port ANT1_IN to the first output port Rx1, the second output port Rx2, and the fifth output port Rx5. The single-pole double-throw switch SPDT is switched to contact a1, and the first switch Q1 is switched to contact b2. The RF signal enters the antenna switching switch 301 from the first input port ANT1_IN, is output from the first output port Rx1, passes through the single-pole double-throw switch SPDT, and enters the B40 filter. The B40 filter filters the received RF signal to obtain the B40 signal. The B40 signal then passes through LNA1... After signal amplification, the signal enters the RF transceiver module. The RF signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, and output from the second output port Rx2 into the B1 filter. The B1 filter filters the received RF signal to obtain the B1 signal. The B1 signal is then amplified and enters the RF transceiver module. The RF signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, and output from the fifth output port Rx5. It then enters the B39 filter through the first switch Q1. The B39 filter filters the received RF signal to obtain the B39 signal. The B39 signal is then amplified by LNA3 and enters the RF transceiver module to realize the reception of RF signals.

[0098] Alternatively, the RF front-end module 30 can use a detached antenna scheme to receive the B40 signal and a combined antenna scheme to receive the B1 and B39 signals. In this case, the antenna switching switch 301 will turn off the path from the first input port ANT1_IN to the first output port Rx1, and turn on the path from the first input port ANT1_IN to the second output port Rx2 and the fifth output port Rx5. The single-pole double-throw switch SPDT will switch to contact a2, and the first switch Q1 will switch to contact b2. The RF signal will be fed into the B40 filter from the second input port ANT2_IN. The B40 filter will filter the received RF signal to obtain the B40 signal. The B40 signal will then be amplified by LNA1 and enter the RF transceiver module to receive the RF signal. The radio frequency (RF) signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, and output from the second output port Rx2 into the B1 filter. The B1 filter filters the received RF signal to obtain the B1 signal. The B1 signal is then amplified and enters the RF transceiver module. The RF signal is also connected to the antenna switching switch 301 from the first input port ANT1_IN, and output from the fifth output port Rx5. It passes through the first switch Q1 and enters the B39 filter. The B39 filter filters the received RF signal to obtain the B39 signal. The B39 signal is then amplified by the LNA3 and enters the RF transceiver module to achieve RF signal reception.

[0099] It should be noted that, Figure 3 The first antenna ANT1 shown can be a multi-frequency antenna, and the second antenna ANT2 can be a single-frequency antenna. The RF front-end module 30 can select the receiving path by switching the antenna switching switch 301 and the single-pole double-throw switch SPDT, that is, to select the antenna removal scheme or the antenna combination scheme to receive RF signals.

[0100] It should be understood that the first switch Q1 and the second switch Q2 can be used to switch the receiving path, selecting a specified RF signal to enter the subsequent low-noise amplifier, which varies depending on the number of filters and LNA amplifiers. The number of devices such as RF channels, switches, antennas, filters, and low-noise amplifiers in this embodiment is only illustrative; the actual number of devices may be one or more, or none at all. This application does not limit these numbers. The antenna switching switch 301 in this embodiment can be a single ANT port or multiple ANT ports; this is only illustrative here.

[0101] In some embodiments, the RF front-end module 30 is also connected to a controller, which can be used to control the on / off state of various circuits within the antenna switching switch 301, and can also be used to control the switching of the receiving paths of the single-pole double-throw switch (SPDT), the first switch Q1, and the second switch Q2. Exemplarily, the controller can be connected to, for example,... Figure 3 The RF front-end module shown, when the controller receives an instruction to receive signals B40, B1, and B39 using a combined antenna scheme, controls the antenna switching switch 301 to open the path from the first input port ANT1_IN to the first output port Rx1, the second output port Rx2, and the fifth output port Rx5, and to close the path from the first input port ANT1_IN to the third output port Rx3, the fourth output port Rx4, and the sixth output port Rx6. The single-pole double-throw switch SPDT switches to contact a1, and the first switch Q1 switches to contact b2. When the controller receives an instruction to receive signals B40 using a disassembled antenna scheme, it controls the antenna switching switch 301 to close the path from the first input port ANT1_IN to the first output port Rx1, and the single-pole double-throw switch SPDT switches to contact a2. The antenna switching switch 301, the single-pole double-throw switch SPDT, the first switch Q1, and the second switch Q2 can be controlled by one controller or by multiple controllers respectively; this embodiment does not limit this.

[0102] It should be understood that the controller determines the target antenna corresponding to the target radio frequency signal based on the target radio frequency signal, and the controller controls the radio frequency front-end module 30 to conduct the receiving path corresponding to the target antenna. Specifically, the conduction process is the switching of the antenna switching switch 301 and the single-pole double-throw switch SPDT by the radio frequency front-end module 30.

[0103] Figure 4 This is a schematic diagram of another radio frequency front-end module 40 provided in an embodiment of this application. The radio frequency front-end module 40 is coupled to a first antenna (ANT1) and a second antenna (ANT2) to receive radio frequency signals. After processing the received radio frequency signals, it is sent to the next-level conversion circuit (such as...). Figure 4 An exemplary radio frequency transceiver module is shown.

[0104] like Figure 4 As shown, the RF front-end module 40 includes an antenna switching switch 401, a first filter 403, a second filter 404, a first amplification module 405, and a second amplification module 406; the antenna switching switch 401 may include a single-pole single-throw switch 402.

[0105] in:

[0106] Antenna switching switch 401 can be used to guide the received radio frequency signal to the first filter 403 and / or the second filter 404. That is, antenna switching switch 401 can be used to select the receiving path of the radio frequency signal to the first filter 403 and / or the second filter 404. The first input port of antenna switching switch 401 is connected to ANT1, the first output terminal Rx1 is connected to the first terminal of the first filter 403, and the second output terminal Rx2 is connected to the first terminal of the second filter 404.

[0107] A single-pole single-throw switch 402 is used to connect either the signal received by ANT1 or the signal received by ANT2 to the first filter 403. The first terminal of the single-pole single-throw switch 402 is connected to the first terminal of the first filter 403, and the second terminal of the single-pole single-throw switch 402 serves as a second input port connected to the first terminal of ANT2. When the single-pole single-throw switch 402 is closed, the receiving path from ANT2 to the first filter 403 is open; when the single-pole single-throw switch 402 is closed, the receiving path from ANT2 to the first filter 403 is closed.

[0108] The first filter 403 is a filter corresponding to the first radio frequency signal. The first filter 403 can be used to filter out signals other than the first radio frequency signal. The first end of the first filter 403 is connected to the first output end Rx1 of the antenna switching switch 401, and the second end of the first filter 403 is connected to the first end of the first amplification module 405.

[0109] The second filter 404 is a filter corresponding to the second radio frequency signal. The second filter 404 can be used to filter out signals other than the second radio frequency signal. The first terminal of the second filter 404 is connected to the second output terminal Rx2 of the antenna switching switch 401, and the second terminal of the second filter 404 is connected to the first terminal of the second amplification module 406. The frequency bands of the aforementioned first radio frequency signal and the aforementioned second radio frequency signal are different.

[0110] The first amplification module 405 and the second amplification module 406 can be used to amplify the received radio frequency (RF) signal. The first terminal of the first amplification module 405 is connected to the second terminal of the first filter 403, and the second terminal of the first amplification module 405 is connected to the RF transceiver module. The first terminal of the second amplification module 406 is connected to the second terminal of the second filter 404, and the second terminal of the second amplification module 406 is connected to the RF transceiver module. Both the first amplification module 405 and the second amplification module 406 can be low-noise amplifiers.

[0111] In one implementation, when the RF front-end module 40 uses a combined antenna scheme to receive the target RF signal, the antenna switching switch 401 within the RF front-end module 40 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when the ANT1 receives the RF signal and enters the RF front-end module 40, it is filtered by the target filter to obtain the target RF signal. Furthermore, the target RF signal is amplified by the amplification module connected to the target filter to obtain the amplified RF signal. Finally, the amplified RF signal enters the RF transceiver module, thereby realizing the reception of the target RF signal. The target RF signal can be the aforementioned first RF signal and / or the aforementioned second RF signal.

[0112] For example, when the RF front-end module 40 receives the first RF signal using a combined antenna scheme, the path from ANT1 to the first output terminal Rx1 in the antenna switching switch 401 is turned on, and the single-pole single-throw switch 402 is turned off; the RF signal received by ANT1 enters the first filter 403 through the antenna switching switch 401, and the first filter 403 filters the received RF signal to obtain the first RF signal; the first RF signal is amplified by the first amplification module 405 and then enters the RF transceiver module.

[0113] For example, when the RF front-end module 40 receives the second RF signal using a combined antenna scheme, the path from ANT1 to the second output terminal Rx2 in the antenna switching switch 401 is turned on; the RF signal received by ANT1 enters the second filter 404 through the antenna switching switch 401, and the second filter 404 filters the received RF signal to obtain the second RF signal; the second RF signal is amplified by the second amplification module 406 and then enters the RF transceiver module.

[0114] In another implementation, when the RF front-end module 40 uses the antenna-splitting scheme to receive signals, the antenna switching switch 401 inside the RF front-end module 40 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when the ANT2 receives the RF signal and enters the RF front-end module 40, it is filtered by the target filter to obtain the target RF signal. Then, the target RF signal is amplified by the amplification module connected to the target filter to obtain the amplified RF signal. Finally, the amplified RF signal enters the RF transceiver module, thereby realizing the reception of the target RF signal.

[0115] For example, when the RF front-end module 40 receives the first RF signal using the antenna-removal scheme, the path from ANT1 to the first output terminal Rx1 in the antenna switching switch 401 is turned off, and the single-pole single-throw switch 402 is closed; the RF signal received by ANT2 enters the first filter 403 through the single-pole single-throw switch 402, and the first filter 403 filters the received RF signal to obtain the first RF signal; the first RF signal is amplified by the first amplification module 405 and then enters the RF transceiver module. It should be noted that... Figure 4 As shown, ANT1 can be a multi-frequency antenna, and ANT2 can be a single-frequency antenna. The receiving path connected to the single-frequency antenna can select the receiving antenna by switching the antenna switching switch 401, that is, to select the antenna removal scheme or the antenna combination scheme to receive radio frequency signals.

[0116] It should be noted that the number of second antennas is not limited to one. That is, signals from multiple frequency bands can be received through separate antennas. This embodiment only uses the example of splitting a signal from one frequency band for illustration. The number of first antennas is not limited to one, and the input port of the antenna switch is not limited to one. That is, multiple antenna switch input ports can be used to receive radio frequency signals. This embodiment only uses the example of one antenna switch input port for illustration.

[0117] The RF front-end module 40 provided in this embodiment does not require an external filter. Furthermore, for the antenna combination scheme, the receiving path from ANT1 to the first filter 403 and / or the second filter 404 is the same as described above. Figure 2 The provided RF front-end module 20 is consistent and does not introduce additional losses.

[0118] Next, an example will be provided. Figure 5 right Figure 4 A detailed introduction to the radio frequency front-end module is provided.

[0119] like Figure 5 As shown, Figure 5This is an example diagram of an RF front-end module 50 provided in an embodiment of this application. The RF front-end module 50 is coupled to ANT1 and ANT2. The RF front-end module 50 can receive RF signals from ANT1 through the first input port ANT1_IN, and can receive RF signals from ANT2 through the second input port ANT2_IN. The RF front-end module 50 can process the received RF signals and then send them to the next-level conversion circuit (such as...). Figure 5 An exemplary radio frequency transceiver module is shown.

[0120] The RF front-end module 50 may include an antenna switching switch 501, a single-pole single-throw switch SPST, a first switch Q1, a second switch Q2, a filter module 502, and an amplifier module 503. The antenna switching switch 501 may include switches SE1-SE7 and switches SH1-SH6. The filter module 502 may include filters B40, B1, B3, B7, B39, and B41. The amplifier module 503 may include a first amplification module (LNA1), a second amplification module (LNA2), a third amplification module (LNA3), and a fourth amplification module (LNA4). Switch SH1 can be referred to as the third switch, and any one of switches SH2-SH6 can be referred to as the fourth switch.

[0121] In this embodiment, the single-pole single-throw (SPST) switch is a switching transistor SE7. The first terminal of the SPST is connected to the first terminal of the B40 filter, and the second terminal serves as the second input port ANT1_IN, connected to ANT2, which can be used to switch the receiving path. When the SPST is closed, the receiving path from ANT2 to the B40 filter is turned on; when the SPST is closed, the receiving path from ANT2 to the B40 filter is turned off. For example, the SPST switch can be a MOSFET.

[0122] in:

[0123] Antenna switching switch 301 may include one input terminal and six output terminals, namely, first output terminal Rx1, second output terminal Rx2, third output terminal Rx3, fourth output terminal Rx4, fifth output terminal Rx5, and sixth output terminal Rx6. Specifically: the input terminal of antenna switching switch 301 serves as the first input port ANT1_IN of RF front-end module 50 and is connected to ANT1; the first terminal of switch SE1 is connected to the first input port ANT1_IN; the second terminal of switch SE1 is connected to the first terminal of switch SH1; and the second terminal of switch SH1 is grounded; switch SE2 is connected to switch SH2; switch SE3 is connected to switch SH3; switch SE4 is connected to switch SH4; switch SE5 is connected to switch SH5; and switch SE6 is connected to switch SH6. The connection method can be found in the connection method of switch SE1 and switch SH1, and will not be repeated here. Switches SE1-SE6 are series switches, which can be used to turn the receiving path on or off. Switches SH1-SH6 are parallel transistors, used to improve the isolation between RF paths. The first terminals of switches SH1, SH2, SH3, SH4, SH5, and SH6 are connected to the first terminals of filters B40, B1, B3, B7, B39, and B41, respectively. Antenna switching switch 501 can be used to output the RF signal received by ANT1 from at least one of the six output terminals. Figure 5 As shown, the antenna switching switch 501 can be used to turn on the radio frequency signal received by ANT1 to at least one of the B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B40 filter.

[0124] The first terminal of filter B40 is connected to the first output terminal Rx1, and the second terminal of filter B40 is connected to the first terminal of LNA1. The first terminal of filter B1 is connected to the second output terminal Rx2, and the second terminal of filter B1 is connected to the first terminal of LNA2. The first terminal of filter B3 is connected to the third output terminal Rx3, and the second terminal of filter B3 is connected to the first terminal (also called contact b1) of the first switch Q1. The first terminal of filter B7 is connected to the fourth output terminal Rx4, and the second terminal of filter B7 is connected to the first terminal (also called contact c1) of the second switch Q2. The first terminal of filter B39 is connected to the fifth output terminal Rx5, and the second terminal of filter B39 is connected to the second terminal (also called contact b2) of the first switch Q1. The first terminal of filter B41 is connected to the sixth output terminal Rx6, and the second terminal of filter B41 is connected to the second terminal (also called contact c2) of the second switch Q2.

[0125] Filters B40, B1, B3, B7, B39, and B41 are the corresponding filters for signals B40, B1, B3, B7, B39, and B41, respectively. Filters B40, B1, B3, B7, B39, and B41 can be used to filter signals other than B40, B1, B3, B7, B39, and B41, respectively.

[0126] The first switch Q1 can be used to turn on the receiving path from the B3 filter to the LNA3 or the B39 filter to the LNA3. The first terminal of the first switch Q1 is connected to the second terminal of the B3 filter, the second terminal of the first switch Q1 is connected to the second terminal of the B39 filter, and the common terminal of the first switch Q1 is connected to the first terminal of the LNA3; for example, the first switch Q1 can be a single-pole double-throw switch.

[0127] When the first switch Q1 is switched to contact b1, the first switch Q1 turns on the receiving path from the B3 filter to the LNA3; when the first switch Q1 is switched to contact b2, the first switch Q1 turns on the receiving path from the B39 filter to the LNA3.

[0128] The second switch Q2 can be used to turn on the receiving path from the B7 filter to the LNA4 or the B41 filter to the LNA4. The first terminal of the second switch Q2 is connected to the second terminal of the B7 filter, the second terminal of the second switch Q2 is connected to the second terminal of the B41 filter, and the common terminal of the second switch Q2 is connected to the first terminal of the LNA4; for example, the first switch Q1 can be a single-pole double-throw switch.

[0129] When the second switch Q2 is switched to contact c1, the second switch Q2 turns on the receiving path from the B7 filter to the LNA4; when the first switch Q1 is switched to contact c2, the second switch Q2 turns on the receiving path from the B41 filter to the LNA4.

[0130] The second terminals of LNA1, LNA2, LNA3, and LNA4 are connected to the RF transceiver module and can be used to amplify the received RF signal. LNA1, LNA2, LNA3, and LNA4 are low-noise amplifiers and can process RF signals simultaneously.

[0131] It should be noted that, Figure 5 As shown, ANT1 can be a multi-frequency antenna, and ANT2 can be a single-frequency antenna. The radio frequency signal received by ANT1 can include signals from any of the following frequency bands: B1, B3, B7, B39, B40, and B41. The radio frequency signal received by ANT2 can include signals from the B40 frequency band (referred to as B40 signal).

[0132] The RF front-end module 50 can simultaneously receive multiple RF signals. The RF front-end module 50 can choose to use either a combined antenna scheme or a split antenna scheme to receive the B40 signal, and use the combined antenna scheme to receive other RF signals. This embodiment of the application exemplifies the split antenna scheme for B40; in other embodiments, one or more RF signals from other frequency bands can also be split and received through separate antennas.

[0133] For example, the RF front-end module 50 can use a combined antenna scheme to receive signals B40, B1, and B39. In this case, switches SE1, SE2, and SE5 are closed, switches SH1, SH2, and SH5 are open, switches SE3, SE4, SE6, and SE7 are open, and switches SH3, SH4, and SH6 are closed. The first switch Q1 switches to contact b2. The RF signal received by ANT1 enters the B40 filter via the antenna switching switch 501. The B40 filter filters the received RF signal to obtain the B40 signal. The 0 signal is amplified by the first amplification module LNA1 and then enters the RF transceiver module. The RF signal received by ANT1 enters the B1 filter through the antenna switching switch 501. The B1 filter filters the received RF signal to obtain the B1 signal. The B1 signal is amplified by the second amplification module LNA2 and then enters the RF transceiver module. The RF signal received by ANT1 enters the B39 filter through the antenna switching switch 501. The B39 filter filters the received RF signal to obtain the B39 signal. The B39 signal is amplified by the third amplification module LNA3 and then enters the RF transceiver module to realize the reception of RF signals.

[0134] Alternatively, the RF front-end module 30 can use a detached antenna scheme to receive the B40 signal and a combined antenna scheme to receive the B1 and B39 signals. Switch SE1 is open, and switches SE2, SE5, and SE7 are closed. Switches SH1, SH2, and SH5 are open, and switches SE3, SE4, and SE6 are open. Switches SH3, SH4, and SH6 are closed, and the first switch Q1 switches to contact b2. The RF signal received by ANT2 enters the B40 filter through the antenna switching switch 501. The B40 filter filters the received RF signal to obtain the B40 signal. The B40 signal is then amplified by LNA1 and enters the RF transceiver module to achieve RF signal reception.

[0135] It should be understood that the first switch Q1 and the second switch Q2 can be used to switch the receiving path, selecting a specified RF signal to enter the subsequent low-noise amplifier, which varies depending on the number of filters and LNA amplifiers. The number of devices such as RF channels, switches, antennas, filters, and low-noise amplifiers in the embodiments of this application are only illustrative examples. The actual number of devices may be one or more, or there may be no such device. This application does not limit these numbers.

[0136] In some embodiments, the RF front-end module 50 is also connected to a controller. The controller is connected to the control terminals of the switching transistors SE1-SE7 and SH1-SH6 inside the antenna switching switch 501. This controller can be used to control the on / off state of various circuits within the antenna switching switch 501, and also to control the switching of the receiving paths of the first switch Q1 and the second switch Q2. Exemplarily, the controller can be connected to, for example... Figure 5 The RF front-end module shown, when the controller receives an instruction to receive signals B40, B1, and B39 using a combined antenna scheme, controls switches SE1, SE2, and SE5 to close, switches SH1, SH2, and SH5 to open, switches SE3, SE4, SE6, and SE7 to open, and switches SH3, SH4, and SH6 to close. The first switch Q1 switches to contact b2. The antenna switching switch 501, the first switch Q1, and the second switch Q2 can be controlled by one controller or by multiple controllers respectively. This embodiment of the application does not limit this.

[0137] It should be understood that the controller determines the target antenna corresponding to the target radio frequency signal based on the target radio frequency signal, and the controller controls the radio frequency front-end module 50 to turn on the receiving path corresponding to the target antenna. Specifically, the turning-on process is that the radio frequency front-end module 50 controls the antenna switching switch 501.

[0138] In some other embodiments of this application, the single-pole single-throw switch SPST can be located outside the antenna switching switch 501. The first end of the single-pole single-throw switch SPST is connected to the first end of the B40 filter, and the second end of the single-pole single-throw switch SPST is connected to the second antenna ANT2 as the second input port ANT2_IN of the RF front-end module 50.

[0139] It should be understood that this is not limited to the above. Figure 5 The antenna switching switch structure and the RF front-end module connection structure shown are different from other structures, which are only illustrated here.

[0140] It should be noted that the number of switches SE1-SE7, switches SH1-SH6, filters, low-noise amplifiers, etc., in the embodiments of this application are merely illustrative and not intended to be limiting; the above Figure 4 , Figure 5 In the RF front-end module shown, each switch is illustrated using an N-channel enhancement-mode MOSFET as an example. In other embodiments, the switching transistors can be... Figure 4 , Figure 5 Each switching transistor can be replaced with a PNP transistor or other types of switching transistors. In this case, each interface can be replaced as needed, and this application embodiment does not limit the scope.

[0141] It should be noted that the above Figures 2-5 In the RF front-end module shown, the filter can be a surface acoustic wave (SAW) filter, a bulk acoustic wave (BAW) filter, or a low-temperature co-fired ceramic (LTCC) filter; the low-noise amplifier can be implemented using Si technology or SiGe technology, and this application embodiment does not limit it.

[0142] Figure 6 This is a schematic diagram of the structure of a wireless communication system provided as an example in an embodiment of this application. Figure 6 As shown, the wireless communication system includes ANT1, ANT2, a radio frequency front-end module 601, and a controller 603. Optionally, the wireless communication system includes a radio frequency transceiver module 602. Wherein:

[0143] The RF front-end module 601 can be the above Figures 2 to 5 Any RF front-end module in, such as Figure 2 The radio frequency front-end module 20 is shown.

[0144] ANT1 and ANT2 can be used to receive radio frequency (RF) signals. RF front-end module 601 can be used to filter and amplify the received RF signals. RF transceiver module 602 can be used to receive the processed RF signals. Controller 603 can be used to control RF front-end module 601 to receive RF signals. The specific process by which controller 603 controls RF front-end module 601 to receive RF signals is exemplified below. Figure 7 The example shown.

[0145] It should be noted that for details on ANT1 and ANT2, please refer to [link / reference needed]. Figures 2 to 5 The relevant descriptions of ANT1 and ANT2 are not repeated here.

[0146] It should be understood that ANT1 and ANT2 can also be used to transmit signals. This application embodiment only describes the signal receiving process of the wireless communication system and does not limit other functions of ANT1 and ANT2. ANT1 and ANT2 can be antenna elements that simultaneously transmit and receive signals of multiple frequency bands, or a combination of multiple antenna elements that transmit and receive signals of different frequency bands respectively. This application does not make specific limitations here.

[0147] based on Figure 6 The wireless communication system shown in this application also provides a control method for controlling a radio frequency (RF) front-end module. This control method can be executed by a controller in the wireless communication system to control the RF front-end module. The RF front-end module may include a single-pole single-throw switch, an antenna switching switch, a filter module, and a low-noise amplifier.

[0148] For example, the radio frequency front-end modules in the embodiments of this application can refer to the radio frequency front-end modules 20, 30, 40 and 50 described above.

[0149] The control method may include some or all of the following steps:

[0150] S1: The controller responds to the first instruction and controls the RF front-end module to receive the target RF signal from ANT1.

[0151] The first instruction is used to instruct the controller to control the radio frequency front-end module to receive the target radio frequency signal from ANT1.

[0152] For example, the wireless communication system includes Figure 3 The RF front-end module 30 and the first antenna ANT1 are shown. When the controller receives an instruction to receive signals B40, B1 and B39 using ANT1, the controller controls the switches in the antenna switching switch 301 from the first input port ANT1_IN to the first output port Rx1, the second output port Rx2 and the fifth output port Rx5 to close, the single-pole double-throw switch SPDT switches to contact a1 and the first switch Q1 switches to contact b2.

[0153] For example, the wireless communication system includes Figure 5 When the controller receives an instruction to receive signals B40, B1 and B39 using ANT1, the RF front-end module 50 and the first antenna ANT1 shown are connected. The controller controls the first input port ANT1_IN to the first output port Rx1, the second output port Rx2 and the fifth output port Rx5 of the antenna switching switch 501 to close, the single-pole single-throw switch SPST is turned off, and the first switch Q1 is switched to contact b2.

[0154] S2: The controller responds to the second instruction and controls the RF front-end module to receive the target RF signal from ANT2.

[0155] The second instruction is used to instruct the controller to control the radio frequency front-end module to receive the target radio frequency signal from ANT2.

[0156] For example, the wireless communication system includes applications for Figure 3 The RF front-end module 30 and the second antenna ANT2 shown are configured such that when the controller receives the B40 signal using ANT2, the controller controls the switch from the first input port ANT1_IN to the first output port Rx1 in the antenna switching switch to turn off, and the single-pole double-throw switch SPDT switches to contact a1.

[0157] For example, the wireless communication system includes Figure 5 When the controller receives an instruction to receive the B40 signal using ANT2, the RF front-end module 50 and the second antenna ANT2 shown are configured to turn off the switch from the first input port ANT1_IN to the first output port Rx1 in the antenna switching switch, and the single-pole single-throw switch SPST is closed.

[0158] It should be noted that the execution order of steps S1 and S2 described above is not limited in the embodiments of this application.

[0159] The aforementioned radio frequency front-end module (or the aforementioned wireless communication system) can be installed in an electronic device. For example, if the electronic device is equipped with the aforementioned wireless communication system, the electronic device can execute the aforementioned control method through the aforementioned controller.

[0160] Among them, electronic devices can be equipped with Or other portable terminal devices with different operating systems, such as mobile phones, tablets, desktop computers, laptops, handheld computers, laptops, ultra-mobile personal computers (UMPCs), netbooks, as well as cellular phones, personal digital assistants (PDAs), augmented reality (AR) devices, virtual reality (VR) devices, artificial intelligence (AI) devices, wearable devices, in-vehicle devices, smart home devices and / or smart city devices, etc.

[0161] The following example uses a mobile phone to receive signals to illustrate the radio frequency front-end module provided in this application.

[0162] Figure 7This is a schematic diagram of a wireless communication module in a mobile phone, provided by an exemplary embodiment of this application. The wireless communication module is used to receive signals and includes a radio frequency (RF) front-end module 701, which can be any one of the RF front-end modules 20, 30, 40, and 50 described above.

[0163] like Figure 7 As shown, the wireless communication module may include ANT1, ANT2, RF module 70, and baseband module 703. RF module 70 may include RF front-end module 701 and RF transceiver module 702. ANT1 and ANT2 are connected to RF front-end module 701, RF front-end module 701 is connected to RF transceiver module 702, and RF transceiver module 702 is connected to baseband module 703.

[0164] ANT1 and ANT2 can be used to receive radio frequency signals and transmit the received radio frequency signals to the radio frequency front-end module 701.

[0165] The RF front-end module 701 can filter and amplify the received RF signal, and then transmit the processed RF signal to the RF transceiver module 702. The RF transceiver module 702 can convert the RF signal into a baseband signal and transmit the baseband signal to the baseband module 703. The baseband module 703 can decode the received baseband signal, extract useful information or data, and then send it to the corresponding module of the mobile phone, such as the Bluetooth module or the WLAN module.

[0166] In some embodiments, the wireless communication module receives Bluetooth or WLAN signals via antenna ANT1. The received Bluetooth or WLAN signals are processed by radio frequency module 70 and baseband module 703 and then sent to the Bluetooth or WLAN module.

[0167] In other embodiments, the wireless communication module receives Bluetooth or WLAN signals via antenna ANT2. The received Bluetooth or WLAN signals are processed by radio frequency module 70 and baseband module 703 and then sent to the Bluetooth or WLAN module.

[0168] It should be understood that Figure 7 The wireless communication module shown allows the mobile phone to communicate wirelessly with terminal devices or network devices (servers, base stations, etc.) to complete information exchange with other devices.

[0169] It should be noted that the flowcharts described in the various embodiments of this application are merely one embodiment. Without departing from the spirit of this application, the steps in the various flowcharts can be modified or changed in various ways, such as performing the steps in the flowcharts in a different order, or deleting, adding or modifying certain steps.

[0170] In the embodiments of this application, "connection" refers to electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components, such as the connection between A and B. Alternatively, A can be directly connected to C, and C can be directly connected to B, with A and B connected through C.

[0171] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0172] In the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple nodes means two or more nodes. "At least one" means any number, such as one, two or more.

[0173] "A and / or B" can be only A, only B, or include both A and B. "At least one of A, B, and C" can be only A, only B, only C, or include A and B, include B and C, include A and C, or include A, B, and C. The terms "first," "second," "third," "fourth," etc., used in this application are only used to distinguish different objects and are not used to indicate the priority or importance of the objects.

[0174] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0175] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Claims

1. A radio frequency front-end module, characterized in that, It includes an antenna switching switch, a single-pole double-throw switch, a first filter, and a second filter; the first filter and the second filter each correspond to a filtering frequency band; the antenna switching switch is connected to the first antenna, the single-pole double-throw switch is connected to the second antenna, the first antenna is a multi-frequency antenna, and the second antenna is a single-frequency antenna; The antenna switching switch is used to select the radio frequency signal received by the first antenna to the single-pole double-throw switch and / or the second filter; The single-pole double-throw switch is used to select the radio frequency signal received by the first antenna and the antenna switching switch or the radio frequency signal received by the second antenna to the first filter.

2. The radio frequency front-end module as described in claim 1, characterized in that, The first terminal of the single-pole double-throw switch is connected to the first output terminal of the antenna switching switch; the second terminal of the single-pole double-throw switch is connected to the second antenna; and the common terminal of the single-pole double-throw switch is connected to the first filter.

3. The radio frequency front-end module as described in claim 1 or 2, characterized in that, The input terminal of the antenna switching switch is connected to the first antenna; the first output terminal of the antenna switching switch is connected to the first terminal of the single-pole double-throw switch; and the second output terminal of the antenna switching switch is connected to the second filter.

4. The radio frequency front-end module as described in any one of claims 1-3, characterized in that, The radio frequency front-end module further includes a first amplification module and a second amplification module; the first amplification module is used to amplify the radio frequency signal output by the first filter, and the second amplification module is used to amplify the radio frequency signal output by the second filter.

5. The radio frequency front-end module as described in any one of claims 1-4, characterized in that, The radio frequency front-end module also includes a third filter, and the third filter, the first filter, and the second filter all correspond to different filtering frequency bands; the third filter is connected to the antenna switching switch.

6. The radio frequency front-end module as described in claim 5, characterized in that, The antenna switching switch is specifically used to send the radio frequency signal received by the first antenna to at least one of the single-pole double-throw switch, the second filter, and the third filter.

7. A radio frequency front-end module, characterized in that, It includes an antenna switching switch, a first filter, and a second filter; the first filter and the second filter each correspond to a filtering frequency band; the antenna switching switch is connected to the first antenna and the second antenna; the first antenna is a multi-frequency antenna and the second antenna is a single-frequency antenna. The antenna switching switch is used to connect the radio frequency signal of the second antenna to the first filter, or to connect the radio frequency signal of the first antenna to the first filter and / or the second filter.

8. The radio frequency front-end module as described in claim 7, characterized in that, The antenna switching switch is also used to simultaneously connect the radio frequency signal of the second antenna to the first filter, and connect the radio frequency signal of the first antenna to the second filter.

9. The radio frequency front-end module as described in claim 7 or 8, characterized in that, The antenna switching switch includes a single-pole single-throw switch, a first switching transistor, and a second switching transistor. The single-pole single-throw switch is located between the second antenna and the first filter, the first switch is located between the first antenna and the first filter, and the second switch is located between the first antenna and the second filter.

10. The radio frequency front-end module as described in claim 9, characterized in that, When the single-pole single-throw switch is turned on, the first switching transistor is turned on; when the first switching transistor is turned on, the single-pole single-throw switch is turned off.

11. The radio frequency front-end module as described in claim 9 or 10, characterized in that, The antenna switching switch further includes a third switching transistor and a fourth switching transistor SH2; the first end of the third switching transistor is connected between the first switching transistor and the first filter, and the second end of the third switching transistor is grounded; the first end of the fourth switching transistor is connected between the second switching transistor and the second filter, and the second end of the fourth switching transistor is grounded.

12. The radio frequency front-end module as described in any one of claims 7-11, characterized in that, The radio frequency front end includes a first amplification module and a second amplification module; the first amplification module is used to amplify the radio frequency signal output by the first filter, and the second amplification module is used to amplify the radio frequency signal output by the second filter.

13. An electronic device, characterized in that, The electronic device includes the radio frequency front-end module as described in any one of claims 1-12.

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