Radio-frequency front-end module and electronic device

Abstract

Disclosed in the embodiments of the present application are a radio-frequency front-end module and an electronic device. A filter in the radio-frequency front-end module is reused, such that the radio-frequency front-end module can process radio-frequency signals from a single-frequency antenna or radio-frequency signals from a multi-frequency antenna by means of the filter. Therefore, external filters can be reduced under the requirement of an antenna splitting scheme.

Description

Radio frequency front-end module and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 22, 2023, with application number 202311228190.8 and application name “A RF front-end module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of wireless communication technology, and in particular to a radio frequency front-end module and electronic equipment. Background Art

[0003] With the rapid development of wireless communication technology, the demand for higher data transmission rates and more reliable communication connections is becoming more and more urgent. Antennas, as an important component of wireless communication systems, play a key role in receiving and transmitting wireless signals.

[0004] The antenna solution for a terminal device is significantly influenced by the product's appearance and specifications. Based on product requirements, you can choose either a combined or split antenna solution to design the RF front-end module and middle-high-band (MHB) antenna in the terminal device. The combined antenna solution uses a single multi-frequency antenna to receive and transmit signals across all frequency bands. This approach is suitable for communication scenarios with varying frequencies, but it also increases design difficulty and current loss, reducing transmit power and receiving sensitivity. The split antenna solution adds a single-frequency antenna to receive and transmit signals in a specific frequency band in addition to the multi-frequency antenna. This solution is suitable for communication scenarios with fixed frequencies, improves transmit power and receiving sensitivity, and reduces design difficulty and current loss.

[0005] Currently, in the antenna removal solution, an external filter needs to be added to cooperate with the single-frequency antenna, which increases hardware resources.

[0006] Summary of the Invention

[0007] An embodiment of the present application provides a radio frequency front-end module and an electronic device. By multiplexing the filters inside the radio frequency front-end module, the radio frequency front-end module can process radio frequency signals from a single-frequency antenna or radio frequency signals from a multi-frequency antenna through the filter, thereby saving external filters when the antenna is removed.

[0008] In the first aspect, an embodiment of the present application provides a radio frequency front-end module, which 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 respectively correspond to a filtering frequency band; the antenna switching switch is connected to the first antenna, and the single-pole double-throw switch is connected to the second 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 passed through the first antenna and the antenna switching switch or the radio frequency signal received by the second antenna to the first filter.

[0009] In this embodiment, a single-pole double-throw switch is added to the RF front-end module to direct the RF signal received by the first antenna and the antenna switch, or the RF signal received by the second antenna, to the first filter. This RF front-end module enables filter reuse, eliminating the need for external filters in antenna detachment scenarios, reducing hardware footprint and costs.

[0010] In combination with the first aspect, in one possible implementation, the first end of the single-pole double-throw switch is connected to the first output end of the antenna switching switch; the second end of the single-pole double-throw switch is connected to the second antenna, and the common end of the single-pole double-throw switch is connected to the first filter.

[0011] In combination with the first aspect, in a possible implementation, the input end of the antenna switching switch is connected to the first antenna; the first output end of the antenna switching switch is connected to the first end of the single-pole double-throw switch; and the second output end of the antenna switching switch is connected to the second filter.

[0012] In combination with the first aspect, in a 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.

[0013] In combination with the first aspect, in a possible implementation, the RF front-end module further includes a third filter, and the filtering frequency bands corresponding to the third filter, the first filter, and the second filter are all different; the third filter is connected to the antenna switching switch.

[0014] In combination with the first aspect, in a possible implementation manner, the antenna switching switch is specifically configured 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.

[0015] In combination with the first aspect, in a possible implementation, the RF front-end module further includes a matching network, and the matching network is used to achieve impedance matching between the first antenna or the second antenna and the RF front-end module.

[0016] In the second aspect, an embodiment of the present application provides 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 respectively correspond to a filtering frequency band; the antenna switching switch is connected to the first antenna, and the antenna switching switch is connected to the 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.

[0017] In an embodiment of the present application, the antenna switching switch is connected to the first antenna, and the antenna switching switch is connected to the second antenna, so that the RF signal of the second antenna can be passed to the first filter, or the RF signal of the first antenna can be passed to the first filter and / or the second filter. In an embodiment of the present application, by reusing the filters in the RF front-end module, external filters can be saved when the antenna is removed, which can reduce the space occupied by hardware resources and reduce the cost of hardware resources.

[0018] In combination with the second aspect, in a possible implementation manner, the antenna switch is further configured to simultaneously conduct the radio frequency signal of the second antenna to the first filter, and to conduct the radio frequency signal of the first antenna to the second filter.

[0019] In combination with the second aspect, in one possible embodiment, the antenna switching switch includes a single-pole single-throw switch, a first switching tube and a second switching tube; the single-pole single-throw switch is located between the second antenna and the first filter, the first switching tube is located between the first antenna and the first filter, and the second switching tube is located between the first antenna and the second filter.

[0020] In combination with the second aspect, in a possible implementation manner, when the single-pole single-throw switch is turned on, the first switch tube is turned off; when the first switch tube is turned on, the single-pole single-throw switch is turned off.

[0021] In this embodiment of the present application, in a combined antenna solution, the first and / or second switching transistors in the RF front-end module are turned on, and the single-pole, single-throw (SPST) switch is turned off. In this case, the RF signal from the first antenna does not pass through the SPST switch. This indicates that in a combined antenna solution, the SPST switch does not cause additional losses and does not affect the performance of the combined antenna solution.

[0022] In the above embodiment, the single-pole single-throw switch and the first switch transistor respectively serve as switches for connecting 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 at the same time, and the RF front-end module cannot simultaneously receive RF signals from the first antenna and the second antenna to the same filter.

[0023] In combination with the second aspect, in a possible embodiment, the antenna switching switch also includes a third switching tube and a fourth switching tube; the first end of the third switching tube is connected between the first switching tube and the first filter, and the second end of the third switching tube is grounded; the first end of the fourth switching tube is connected between the second switching tube and the second filter, and the second end of the fourth switching tube is grounded.

[0024] In the above embodiment, the third switch and the fourth switch are used to improve the isolation between different receiving channels and reduce signal interference caused by other receiving channels.

[0025] In combination with the second aspect, in a possible implementation, the RF front end may include 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.

[0026] In a third aspect, an embodiment of the present application provides an electronic device, which includes the first aspect or the second aspect, and the radio frequency front-end module in any possible implementation of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1A is a circuit diagram of an RF front-end module according to an embodiment of the present application;

[0029] FIG1B is a circuit diagram of an RF front-end module according to an embodiment of the present application;

[0030] FIG2 is a structural diagram of an RF front-end module provided in an embodiment of the present application;

[0031] FIG3 is a circuit diagram of an RF front-end module provided in an embodiment of the present application;

[0032] FIG4 is a structural diagram of another RF front-end module provided in an embodiment of the present application;

[0033] FIG5 is a circuit diagram of another RF front-end module provided in an embodiment of the present application;

[0034] FIG6 is a structural diagram of a wireless communication system provided in an embodiment of the present application;

[0035] FIG7 is a schematic diagram of a wireless communication module in a mobile phone provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] In order to facilitate the description of the RF front-end module embodiment of the present application, the technical terms are now explained.

[0038] 1. Radio frequency front-end module (RFFMM), used to process RF signals and convert wireless signals received from the antenna into digital signals for subsequent digital processing and communication functions. In the embodiments of the present application, the RF front-end module can also be referred to as the RF front-end circuit.

[0039] 2. Antenna (ANT): It is used to receive radio frequency signals from the wireless channel during reception and radiate radio frequency signals into the wireless channel during transmission.

[0040] 3. Antenna switch (ASW), connected between the antenna and the signal processing module, controls the conduction or disconnection of one or more paths from the antenna to the signal processing module. Exemplarily, the ASW can be a multi-pole, multi-throw switch, used to switch between different signal paths, including switching between receive and transmit, switching between different frequency bands, etc. In the embodiments of the present application, the antenna switch can also be referred to as an antenna selection switch module.

[0041] 4. Low noise amplifier (LNA), which is mainly used to amplify the power of the received RF signal, reduce the noise coefficient of the RF signal receiving path, and improve the receiving sensitivity index. In the embodiment of the present application, the low noise amplifier can also be called an amplifier module.

[0042] The RF signal receiving path refers to the route used to receive RF signals in the RF front-end module. It includes multiple links, from the antenna switching switch to the filter and then to the amplification module, to complete the reception and processing of RF signals. In the embodiments of this application, the RF signal receiving path can also be referred to as the receiving path.

[0043] 5. Filter: used to filter out specific frequency components of the RF signal to obtain a signal of a specific frequency.

[0044] In the embodiment of the present 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.

[0045] Exemplarily, the radio frequency signals received by the antenna may include signals in 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 signals in the B41 band.

[0046] In the embodiments of this application, for ease of description, signals in the Bn frequency band are referred to as Bn signals, such as signals in the B41 frequency band are referred to as B41 signals. The filters corresponding to the Bn frequency band are referred to as Bn filters, such as filters corresponding to the B41 frequency band are referred to as B41 filters. Bn can be B1, B3, B7, B39, B40, B41, etc., and this embodiment of the application does not limit this.

[0047] 6. Single pole single throw (SPST) switch, which controls the conduction or disconnection of the RF 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.

[0048] 7. Single pole double throw (SPDT) switch, two inputs and one output, or one input and two outputs, its function is to select the RF signal to one of the two paths.

[0049] First, a combined antenna solution is exemplarily described with reference to FIG1A , which can transmit and receive signals of six frequency bands (B1 / B3 / B7 / B39 / B40 / B41) on a single antenna (i.e., the first antenna).

[0050] The combined antenna solution includes a first antenna (abbreviated 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.

[0051] 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. Amplifier module 103 may include four amplification modules, namely, a first amplification module (referred to as LNA1), a second amplification module (referred to as LNA2), a third amplification module (referred to as LNA3), and a fourth amplification module (referred to as LNA4). It should be noted that in FIG1A , the blank rectangles exemplarily represent three switches: a switch connected to LNA1, a switch connected to LNA3, and a switch connected to LNA4.

[0052] In one implementation, the RF front-end module 10 can support various frequency bands by switching the receiving path of the first antenna through the antenna selection switch module 101 .

[0053] As shown in Figure 1A , the receiving paths for the six frequency bands are similar, all entering the ANT_IN input port of the RF front-end module 10 from ANT1. After selecting the filter 102 for the corresponding receiving path via the antenna selection switch module 101 of the RF front-end module 10, the signals then enter the amplifier module 103 to receive the RF signals. It should be noted that the RF front-end module 10 may also include a matching network, etc.; the reception of the B3, B7, B39, B40, and B41 signals also passes through a closed switch (as indicated by the blank rectangle in Figure 1A ).

[0054] As shown in FIG1A , 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 may be used to connect to a single-frequency antenna and an external B40 filter (referred to as the B40 filter B to distinguish it from the B40 filter A) to receive a single-frequency signal B40.

[0055] Next, we'll use the example of receiving the B40 signal through a separate antenna to describe the antenna splitting solution. As shown in Figure 1B, the second antenna (referred to as ANT2) is connected to the B40 filter B, which is then connected to the B40 switch via the input port B40_AUX.

[0056] It should be noted that the embodiments of the present application are illustratively described using the split B40 as an example. In other embodiments, RF signals of other frequency bands can also be split out and received through separate antennas. The embodiments of the present application do not limit the frequency bands of the split RF signals.

[0057] As shown in Figure 1B, receiving path route A exemplarily shows the receiving path A (referred to as Path A) of the B40 signal in the combined antenna scheme. The receiving paths other than B40 are similar to Path A; route B exemplarily shows the receiving path B (referred to as Path B) of the B40 signal in the disassembled antenna scheme.

[0058] For the combined antenna solution, as shown in route A, the B40 signal enters the ANT port of the RF front-end module 10 from ANT1, selects the filter 102 corresponding to the receiving path through the antenna selection switch module 101 in the RF front-end module 10, and then enters the amplifier module 103, thereby realizing the reception of the RF signal.

[0059] For the antenna removal solution, 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.

[0060] It should be noted that ANT1 shown in FIG. 1B is a multi-frequency antenna, and ANT2 is a single-frequency antenna.

[0061] In the antenna removal solution, when ANT2 is used to receive the B40 RF signal alone, an 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.

[0062] In view of this, the embodiment of the present application realizes filter reuse by merging the receiving path of a single-frequency antenna with the receiving path used by a multi-frequency antenna, which can reduce the occupied space of hardware resources and reduce the cost of hardware resources.

[0063] The RF front-end module provided in this application is suitable for terminal devices (such as mobile phones and tablet computers) that use split antenna solutions and combined antenna solutions for wireless communication.

[0064] The RF front-end module provided in the embodiment of the present application is exemplarily introduced below with reference to Figures 2 to 4.

[0065] Figure 2 is a schematic diagram of the structure of a radio frequency front-end module 20 provided in an embodiment of the present application. The radio frequency front-end module 20 is coupled to a first antenna (referred to as ANT1) and a second antenna (referred to as ANT2) to receive radio frequency signals, process the received radio frequency signals, and transmit them to a downstream conversion circuit (such as the radio frequency transceiver module shown in Figure 2).

[0066] As shown in FIG2 , 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 .

[0067] The antenna switching switch 201 can be used to select a receive path from ANT1 to the single-pole double-throw switch 202 and / or from ANT1 to the second filter 204. A first input port of the antenna switching switch 201 is connected to ANT1, a first output port Rx1 of the antenna switching switch 201 is connected to a first terminal (also referred to as contact a1) of the single-pole double-throw switch 202, and a second output port Rx2 of the antenna switching switch 201 is connected to a first terminal of the second filter 204.

[0068] The single-pole double-throw switch 202 can be used to select the receive path from ANT2 to the first filter 203 (referred to as the first path) or the receive path from the antenna switching 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 switching 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.

[0069] In some embodiments, when the single-pole double-throw switch 202 is switched to contact a1, the single-pole double-throw switch 202 connects 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 connects the receiving path from ANT2 to the first filter 203.

[0070] It should be noted that, at the same time, the single-pole double-throw switch 202 can only connect one of the first path and the second path.

[0071] The first filter 203 is a filter corresponding to the first RF signal and can be used to filter out signals other than the first RF signal. A first end of the first filter 203 is connected to the common end of the single-pole double-throw switch 202, and a second end of the first filter 203 is connected to the first end of the first amplification module 205.

[0072] Second filter 204 is a filter corresponding to the second RF signal and can be used to filter out signals other than the second RF signal. A first end of second filter 204 is connected to the second output terminal Rx2 of antenna switch 201, and a second end of second filter 204 is connected to the first end of second amplification module 206. The first RF signal and the second RF signal have different frequency bands.

[0073] The first amplification module 205 and the second amplification module 206 can be used to amplify received radio frequency signals. The first end of the first amplification module 205 is connected to the second end of the first filter 203, and the second end of the first amplification module 205 is connected to the radio frequency transceiver module. The first end of the second amplification module 206 is connected to the second end of the second filter 204, and the second end of the second amplification module 206 is connected to the radio frequency transceiver module. Both the first amplification module 205 and the second amplification module 206 can be low-noise amplifiers.

[0074] In one implementation, when the RF front-end module 20 uses a combined antenna solution to receive a target RF signal, the antenna switching switch 201 and the single-pole double-throw switch 202 in the RF front-end module 20 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when 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; then, the target RF signal is amplified by the amplifier module connected to the target filter to obtain an amplified RF signal; finally, the amplified RF signal enters the RF transceiver module, thereby achieving reception of the target RF signal. The target RF signal can be the above-mentioned first RF signal and / or the above-mentioned second RF signal.

[0075] For example, when the RF front-end module 20 adopts a combined antenna scheme to receive a first RF signal, 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 a first RF signal; the first RF signal is amplified by the first amplification module 205 and enters the RF transceiver module.

[0076] For example, when the RF front-end module 20 adopts a combined antenna scheme to receive a 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 a second RF signal; the second RF signal is amplified by the second amplification module 206 and enters the RF transceiver module.

[0077] In another implementation, when the RF front-end module 20 adopts the antenna removal scheme to receive signals, the antenna switching switch 201 and the single-pole double-throw switch 202 in the RF front-end module 20 can select the filter corresponding to the target RF signal (referred to as the target filter for short). Then, when 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.

[0078] For example, when the RF front-end module 20 uses the split antenna solution to receive a first RF signal, the receiving path from ANT1 to the first output terminal Rx1 in the antenna switching switch 201 is shut off, and the single-pole double-throw switch 202 is switched to contact a2. The RF signal received by ANT2 enters the first filter 203 through the single-pole double-throw switch 202. The first filter 203 filters the received RF signal to obtain a first RF signal. The first RF signal is amplified by the first amplifier module 205 and then enters the RF transceiver module. It should be noted that ANT1 shown in Figure 2 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, using the split antenna solution or the combined antenna solution to receive the RF signal.

[0079] It should be noted that the number of second antennas is not limited to one. In other words, signals in multiple frequency bands can be received through separate antennas. This embodiment of the present application only uses the example of splitting the signal of one frequency band. The number of first antennas is also not limited to one, and the input port of the antenna switching switch is not limited to one. In other words, multiple antenna switching switch input ports can be used to receive RF signals. This embodiment of the present application only uses one antenna switching switch input port as an example.

[0080] The number of devices such as RF channels, switches, antennas, filters, and low-noise amplifiers in the embodiments of the present application is for illustrative purposes only. The actual number of devices may be one or more, or there may be no such device. The present application does not impose any restrictions on these numbers. It should be noted that the RF front-end module 20 shown in Figure 2 may also include a matching network, and the matching network may include one or more passive devices, which may be inductors or capacitors. The matching network can be used to achieve impedance matching between the antenna and the RF front-end module 20 to ensure maximum power transmission and minimum signal reflection. Among them, the inductor can be implemented by a winding inductor, a substrate inductor, or an on-chip inductor; the capacitor can be implemented by a ceramic capacitor, a substrate capacitor, or an on-chip capacitor.

[0081] The RF front-end module 20 provided in the embodiment of the present application does not require an external filter when using a detachable antenna solution, thereby reducing manufacturing costs.

[0082] Next, the RF front-end module of FIG. 2 is described in detail with reference to FIG. 3 .

[0083] As shown in Figure 3, Figure 3 is an example diagram of an RF front-end module 30 provided in an embodiment of the present 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 a first input port ANT1_IN, and the RF front-end module 30 can receive RF signals from ANT2 through a second input port ANT2_IN.

[0084] 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; and the amplifier module 303 may include a first amplifier module (referred to as LNA1), a second amplifier module (referred to as LNA2), a third amplifier module (referred to as LNA3), and a fourth amplifier module (referred to as LNA4). Specifically:

[0085] The antenna switching switch 301 may include one input terminal and six output terminals, namely a first output terminal Rx1, a second output terminal Rx2, a third output terminal Rx3, a fourth output terminal Rx4, a fifth output terminal Rx5, and a sixth output terminal Rx6. The input terminal of the antenna switching switch 301 is connected to ANT1 as the first input port ANT1_IN of the RF front-end module 30. The first output terminal Rx1 is connected to the first terminal (also known as 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 connected to the first terminals of the B1 filter, the B3 filter, the B7 filter, the B39 filter, and the B41 filter, respectively.

[0086] Antenna switch 301 can be used to output the RF signal received by ANT1 from at least one of the six output terminals. As shown in FIG3 , antenna switch 301 can be used to conduct the RF signal received by ANT1 to at least one of the single-pole double-throw switch (SPDT), filter B1, filter B3, filter B7, filter B39, and filter B41.

[0087] A single-pole double-throw switch (SPDT) can be used to conduct the receive path from ANT2 to the B40 filter, or the receive path from the antenna switching switch 301 to the B40 filter. A first terminal of the SPDT is connected to the first output terminal Rx1. A second terminal (also called contact a2) of the SPDT serves as the second input port ANT2_IN of the RF front-end module 30 and is connected to ANT2. A common terminal of the SPDT is connected to the first terminal of the B40 filter.

[0088] 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 the antenna switching switch 301 to the B40 filter; 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 the B40 filter.

[0089] The first end of the B40 filter is connected to the common terminal of the single-pole double-throw switch (SPDT), and the second end of the B40 filter is connected to the first terminal of LNA1. The first end of the B1 filter is connected to the second output terminal (Rx2), and the second end of the B1 filter is connected to the first terminal of LNA2. The first end of the B3 filter is connected to the third output terminal (Rx3), and the second end of the B3 filter is connected to the first terminal of the first switch (Q1) (also known as contact b1). The first end of the B7 filter is connected to the fourth output terminal (Rx4), and the second end of the B7 filter is connected to the first terminal of the second switch (Q2) (also known as contact c1). The first end of the B39 filter is connected to the fifth output terminal (Rx5), and the second end of the B39 filter is connected to the second terminal of the first switch (Q1) (also known as contact b2). The first end of the B41 filter is connected to the sixth output terminal (Rx6), and the second end of the B41 filter is connected to the second terminal of the second switch (Q2) (also known as contact c2).

[0090] The B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter are filters corresponding to the B40 signal, B1 signal, B3 signal, B7 signal, B39 signal and B41 signal respectively; the B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter can be used to filter out signals other than the B40 signal, B1 signal, B3 signal, B7 signal, B39 signal and B41 signal respectively.

[0091] The first switch Q1 can be used to conduct the receive path from the B3 filter to the LNA3 or the receive path from the B39 filter to the LNA3. A first end of the first switch Q1 is connected to the second end of the B3 filter, a second end of the first switch Q1 is connected to the second end of the B39 filter, and a common end of the first switch Q1 is connected to the first end of the LNA3. Exemplarily, the first switch Q1 can be a single-pole double-throw switch.

[0092] When the first switch Q1 is switched to the contact point 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 the contact point b2, the first switch Q1 turns on the receiving path from the B39 filter to the LNA3.

[0093] The second switch Q2 can be used to conduct the receiving path from the B7 filter to the LNA4 or the receiving path from the B41 filter to the LNA4. The first end of the second switch Q2 is connected to the second end of the B7 filter, the second end of the second switch Q2 is connected to the second end of the B41 filter, and the common end of the second switch Q2 is connected to the first end of the LNA4. Exemplarily, the first switch Q1 can be a single-pole double-throw switch.

[0094] When the second switch Q2 is switched to the contact point 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 the contact point c2, the second switch Q2 turns on the receiving path from the B41 filter to the LNA4;

[0095] 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 that can process RF signals simultaneously.

[0096] It should be noted that ANT1 shown in Figure 3 can be a multi-frequency antenna, ANT2 can be a single-frequency antenna, the RF signal received by ANT1 can include the signal of any frequency band among the B1 frequency band, B3 frequency band, B7 frequency band, B39 frequency band, B40 frequency band and B41 frequency band, and the RF signal received by ANT2 can include the signal of the B40 frequency band (referred to as B40 signal).

[0097] The RF front-end module 30 can receive multiple RF signals simultaneously. The RF front-end module 30 can choose to use a combined antenna solution or a split antenna solution to receive the B40 signal, and a combined antenna solution to receive other RF signals. In the embodiment of this application, the split B40 is used as an example for illustration. In other embodiments, RF signals of one or more other frequency bands can also be split out and received through separate antennas.

[0098] It should be understood that for a specific frequency band, split antenna solutions and combined antenna solutions are mutually exclusive. However, for different frequency bands, split antenna solutions and combined antenna solutions can be used separately. For example, for frequency band B32, products also involve split or combined antenna solutions. Products can be any combination of: B32 combined antenna solution + B40 split antenna solution, B32 combined antenna solution + B40 combined antenna solution, or B32 split antenna solution + B40 split antenna solution.

[0099] Exemplarily, the RF front-end module 30 can adopt a combined antenna solution to receive B40 signals, B1 signals, and B39 signals. At this time, the antenna switching switch 301 can connect the path from the first input port ANT1_IN to the first output terminal Rx1, the second output terminal Rx2, and the fifth output terminal Rx5, and the single-pole double-throw switch SPDT is switched to the contact a1, and the first switch Q1 is switched to the contact b2; the RF signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, output from the first output terminal Rx1, and enters the B40 filter through the single-pole double-throw switch SPDT. The B40 filter filters the received RF signal to obtain the B40 signal; the B40 signal then passes through the LNA1 After signal amplification, it enters the RF transceiver module; the RF signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, output from the second output port Rx2 and enters the B1 filter, which 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, output from the fifth output port Rx5, and enters the B39 filter through the first switch Q1, which 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 the RF signal.

[0100] Alternatively, the RF front-end module 30 can use a split antenna solution to receive the B40 signal, and a combined antenna solution to receive the B1 signal and the B39 signal; at this time, the antenna switching switch 301 will cut off the path from the first input port ANT1_IN to the first output terminal Rx1, and connect the path from the first input port ANT1_IN to the second output terminal Rx2 and the fifth output terminal Rx5, the single-pole double-throw switch SPDT switches to contact a2, and the first switch Q1 switches to contact b2; the RF signal is connected to the B40 filter from the second input port ANT2_IN, and 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 realize the reception of the RF signal. The RF signal is connected to the antenna switching switch 301 from the first input port ANT1_IN, output from the second output port Rx2, and enters 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, output from the fifth output port Rx5, and 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 the LNA3 and enters the RF transceiver module to realize the reception of the RF signal.

[0101] It should be noted that the first antenna ANT1 shown in Figure 3 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, choose to use the antenna splitting solution or the antenna combining solution to receive the RF signal.

[0102] It should be understood that the first switch Q1 and the second switch Q2 can be used to switch the receive path, selecting a specific RF signal to enter the subsequent low-noise amplifier, and the number of components varies depending on the number of filters and LNA amplifiers. The number of components such as RF channels, switches, antennas, filters, and low-noise amplifiers in the embodiments of this application is for illustrative purposes only. The actual number of components can be one, multiple, or even none, and this application does not impose any limitation on these numbers. The antenna switching switch 301 in the embodiments of this application can have a single ANT port or multiple ANT ports, and this is for illustrative purposes only.

[0103] In some embodiments, the RF front-end module 30 is also connected to a controller, which can be used to control the conduction or shutdown of various circuits inside 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. For example, the controller can be connected to the RF front-end module shown in Figure 3. When the controller receives an instruction to use a combined antenna solution to receive the B40 signal, the B1 signal, and the B39 signal, the controller controls the antenna switching switch 301 to connect the path from the first input port ANT1_IN to the first output terminal Rx1, the second output terminal Rx2, and the fifth output terminal Rx5, and disconnect the circuit from the first input port ANT1_IN to the third output terminal Rx3, the fourth output terminal Rx4, and the sixth output terminal Rx6, and switches the single-pole double-throw switch SPDT to contact a1 and the first switch Q1 to contact b2. When the controller receives an instruction to use a split antenna solution to receive the B40 signal, the controller controls the antenna switching switch 301 to disconnect the path from the first input port ANT1_IN to the first output terminal Rx1 and switches the single-pole double-throw switch SPDT 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 a single controller or by multiple controllers, which is not limited in this embodiment of the present application.

[0104] It should be understood that the controller determines the target antenna corresponding to the target RF signal based on the target RF signal, and the controller controls the RF front-end module 30 to turn on the receiving path corresponding to the target antenna. The specific conduction process is that the RF front-end module 30 controls the switching of the antenna switching switch 301 and the single-pole double-throw switch SPDT.

[0105] Figure 4 is a schematic diagram of the structure of another RF front-end module 40 provided in an embodiment of the present application. The RF front-end module 40 is coupled to a first antenna (referred to as ANT1) and a second antenna (referred to as ANT2) to receive RF signals, process the received RF signals, and then transmit them to a downstream conversion circuit (such as the RF transceiver module shown in Figure 4).

[0106] As shown in FIG4 , the RF front-end module 40 includes an antenna switching switch 401 , a first filter 403 , a second filter 404 , a first amplifying module 405 and a second amplifying module 406 ; the antenna switching switch 401 may include a single-pole single-throw switch 402 .

[0107] in:

[0108] Antenna switch 401 can be used to direct received RF signals to first filter 403 and / or second filter 404. In other words, antenna switch 401 can be used to select a receiving path for RF signals to first filter 403 and / or second filter 404. A first input port of antenna switch 401 is connected to ANT1, a first output port Rx1 is connected to a first terminal of first filter 403, and a second output port Rx2 is connected to a first terminal of second filter 404.

[0109] Single-pole, single-throw switch 402 is used to conduct the signal received by ANT1 or ANT2 to first filter 403. The first end of SPST switch 402 is connected to the first end of first filter 403, and the second end of SPST switch 402 serves as the second input port and is connected to the first end of ANT2. When SPST switch 402 is closed, the receive path from ANT2 to first filter 403 is open; when SPST switch 402 is closed, the receive path from ANT2 to first filter 403 is closed.

[0110] The first filter 403 is a filter corresponding to the first RF signal and can be used to filter out signals other than the first RF signal. A first end of the first filter 403 is connected to the first output terminal Rx1 of the antenna switching switch 401, and a second end of the first filter 403 is connected to the first end of the first amplification module 405.

[0111] Second filter 404 is a filter corresponding to the second RF signal and can be used to filter out signals other than the second RF signal. A first end of second filter 404 is connected to the second output terminal Rx2 of antenna switch 401, and a second end of second filter 404 is connected to the first end of second amplification module 406. The first RF signal and the second RF signal have different frequency bands.

[0112] The first amplification module 405 and the second amplification module 406 can be used to amplify received radio frequency signals. The first end of the first amplification module 405 is connected to the second end of the first filter 403, and the second end of the first amplification module 405 is connected to the radio frequency transceiver module. The first end of the second amplification module 406 is connected to the second end of the second filter 404, and the second end of the second amplification module 406 is connected to the radio frequency transceiver module. Both the first amplification module 405 and the second amplification module 406 can be low-noise amplifiers.

[0113] In one implementation, when the RF front-end module 40 uses a combined antenna solution to receive a target RF signal, the antenna switching switch 401 in the RF front-end module 40 can select the filter corresponding to the target RF signal (referred to as the target filter). Then, when 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; then, the target RF signal is amplified by the amplifier module connected to the target filter to obtain an amplified RF signal; finally, the amplified RF signal enters the RF transceiver module, thereby achieving reception of the target RF signal. The target RF signal can be the first RF signal and / or the second RF signal.

[0114] Illustratively, when the RF front-end module 40 adopts a combined antenna scheme to receive a first RF signal, 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 a first RF signal; the first RF signal is amplified by the first amplification module 405 and enters the RF transceiver module.

[0115] For example, when the RF front-end module 40 adopts a combined antenna scheme to receive a second RF signal, 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 a second RF signal; the second RF signal is amplified by the second amplification module 406 and enters the RF transceiver module.

[0116] In another implementation, when the RF front-end module 40 adopts the antenna removal scheme to receive signals, the antenna switching switch 401 in the RF front-end module 40 can select the filter corresponding to the target RF signal (referred to as the target filter for short). Then, when 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.

[0117] For example, when the RF front-end module 40 uses the split antenna solution to receive a first RF signal, the path from ANT1 to the first output terminal Rx1 in the antenna switching switch 401 is disconnected, and the single-pole single-throw switch 402 is closed. The RF signal received by ANT2 enters the first filter 403 via the single-pole single-throw switch 402. The first filter 403 filters the received RF signal to obtain a first RF signal. The first RF signal is amplified by the first amplifier module 405 and then enters the RF transceiver module. It should be noted that ANT1 shown in Figure 4 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, using the split antenna solution or the combined antenna solution to receive the RF signal.

[0118] It should be noted that the number of second antennas is not limited to one. In other words, signals in multiple frequency bands can be transmitted through separate antennas. This embodiment of the application only uses the example of splitting the signal of one frequency band. The number of first antennas is not limited to one, and the input port of the antenna switching switch is not limited to one. In other words, there can be multiple antenna switching switch input ports to receive RF signals. This embodiment of the application only uses one antenna switching switch input port as an example.

[0119] The RF front-end module 40 provided in the embodiment of the present application does not require an external filter. At the same time, for the combined antenna solution, the receiving path from ANT1 to the first filter 403 and / or the second filter 404 is consistent with the RF front-end module 20 provided in Figure 2 above, and no additional loss is introduced.

[0120] Next, the RF front-end module of FIG. 4 is described in detail with reference to FIG. 5 .

[0121] As shown in Figure 5, Figure 5 is an example diagram of an RF front-end module 50 provided in an embodiment of the present 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 the RF front-end module 50 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 transmit them to the lower-level conversion circuit (such as the RF transceiver module shown in Figure 5).

[0122] 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 through SE7 and switches SH1 through SH6. The filter module 502 may include filters B40, B1, B3, B7, B39, and B41. The amplifier module 503 may include a first amplifier module (referred to as LNA1), a second amplifier module (referred to as LNA2), a third amplifier module (referred to as LNA3), and a fourth amplifier module (referred to as LNA4). The switch SH1 may be referred to as the third switch, and any of the switches SH2 through SH6 may be referred to as the fourth switch.

[0123] In this embodiment of the present application, the single-pole, single-throw switch (SPST) is a switch transistor SE7. The first end of the SPST is connected to the first end of the B40 filter, and the second end serves as the second input port ANT1_IN and is connected to ANT2, thereby switching the receive path. When the SPST is closed, the receive path from ANT2 to the B40 filter is connected; when the SPST is closed, the receive path from ANT2 to the B40 filter is disconnected. For example, the SPST can be a MOS transistor.

[0124] in:

[0125] The antenna switching switch 301 may include an input terminal and six output terminals, the six output terminals being a first output terminal Rx1, a second output terminal Rx2, a third output terminal Rx3, a fourth output terminal Rx4, a fifth output terminal Rx5, and a sixth output terminal Rx6. Specifically, the input terminal of the antenna switching switch 501 is connected to ANT1 as the first input port ANT1_IN of the RF front-end module 50, the first terminal of the switch transistor SE1 is connected to the first input port ANT1_IN, the second terminal of the switch transistor SE1 is connected to the first terminal of the switch transistor SH1, and the second terminal of the switch transistor SH1 is grounded; the switch transistor SE2 is connected to the switch transistor SH2, the switch transistor SE3 is connected to the switch transistor SH3, the switch transistor SE4 is connected to the switch transistor SH4, the switch transistor SE5 is connected to the switch transistor SH5, and the switch transistor SE6 is connected to the switch transistor SH6. The connection method can be referred to the connection method of switch tube SE1 and switch tube SH1, which will not be repeated here; switch tubes SE1-SE6 are series switch tubes, which can be used to turn on or off the receiving path; switch tubes SH1-SH6 are parallel transistors, which are used to improve the isolation between RF paths; the first ends of switch tubes SH1, switch tube SH2, switch tube SH3, switch tube SH4, switch tube SH5 and switch tube SH6 are respectively connected to the first ends of the B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter. Antenna switching switch 501 can be used to output the RF signal received by ANT1 from at least one of the six output terminals. As shown in Figure 5, antenna switching switch 501 can be used to conduct the RF signal received by ANT1 to at least one of the B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B40 filter.

[0126] The first end of the B40 filter is connected to the first output terminal Rx1, and the second end of the B40 filter is connected to the first end of the LNA1. The first end of the B1 filter is connected to the second output terminal Rx2, and the second end of the B1 filter is connected to the first end of the LNA2. The first end of the B3 filter is connected to the third output terminal Rx3, and the second end of the B3 filter is connected to the first end of the first switch Q1 (also known as contact b1). The first end of the B7 filter is connected to the fourth output terminal Rx4, and the second end of the B7 filter is connected to the first end of the second switch Q2 (also known as contact c1). The first end of the B39 filter is connected to the fifth output terminal Rx5, and the second end of the B39 filter is connected to the second end of the first switch Q1 (also known as contact b2). The first end of the B41 filter is connected to the sixth output terminal Rx6, and the second end of the B41 filter is connected to the second end of the second switch Q2 (also known as contact c2).

[0127] The B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter are filters corresponding to the B40 signal, B1 signal, B3 signal, B7 signal, B39 signal and B41 signal respectively; the B40 filter, B1 filter, B3 filter, B7 filter, B39 filter and B41 filter can be used to filter out signals other than the B40 signal, B1 signal, B3 signal, B7 signal, B39 signal and B41 signal respectively.

[0128] The first switch Q1 can be used to conduct the receive path from the B3 filter to the LNA3 or the receive path from the B39 filter to the LNA3. A first end of the first switch Q1 is connected to the second end of the B3 filter, a second end of the first switch Q1 is connected to the second end of the B39 filter, and a common end of the first switch Q1 is connected to the first end of the LNA3. Exemplarily, the first switch Q1 can be a single-pole double-throw switch.

[0129] When the first switch Q1 is switched to the contact point 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 the contact point b2, the first switch Q1 turns on the receiving path from the B39 filter to the LNA3.

[0130] The second switch Q2 can be used to conduct the receiving path from the B7 filter to the LNA4 or the receiving path from the B41 filter to the LNA4. The first end of the second switch Q2 is connected to the second end of the B7 filter, the second end of the second switch Q2 is connected to the second end of the B41 filter, and the common end of the second switch Q2 is connected to the first end of the LNA4. Exemplarily, the first switch Q1 can be a single-pole double-throw switch.

[0131] When the second switch Q2 is switched to the contact point 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 the contact point c2, the second switch Q2 turns on the receiving path from the B41 filter to the LNA4;

[0132] 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 that can process RF signals simultaneously.

[0133] It should be noted that ANT1 shown in Figure 5 can be a multi-frequency antenna, ANT2 can be a single-frequency antenna, the RF signal received by ANT1 can include the signal of any frequency band among the B1 frequency band, B3 frequency band, B7 frequency band, B39 frequency band, B40 frequency band and B41 frequency band, and the RF signal received by ANT2 can include the signal of the B40 frequency band (referred to as B40 signal).

[0134] The RF front-end module 50 can receive multiple RF signals simultaneously. The RF front-end module 50 can choose to use a combined antenna solution or a split antenna solution to receive the B40 signal, and a combined antenna solution to receive other RF signals. In the embodiments of this application, the split B40 is used as an example for illustration. In other embodiments, RF signals of one or more other frequency bands can also be split out and received through separate antennas.

[0135] Exemplarily, the RF front-end module 50 can use a combined antenna solution to receive the B40 signal, the B1 signal, and the B39 signal. At this time, the switch tubes SE1, SE2, and SE5 are closed, the switch tubes SH1, SH2, and SH5 are disconnected, the switch tubes SE3, SE4, SE6, and SE7 are disconnected, the switch tubes SH3, SH4, and SH6 are closed, and the first switch Q1 is switched to the contact b2; the RF signal received by ANT1 enters the B40 filter through the antenna switching switch 501, and the B40 filter filters the received RF signal to obtain the B40 signal; The 0 signal is then amplified by the first amplification module LNA1 and enters the RF transceiver module; the RF signal received by ANT1 enters the B1 filter through the antenna switching switch 501, and the B1 filter filters the received RF signal to obtain the B1 signal; the B1 signal is then amplified by the second amplification module LNA2 and enters the RF transceiver module; the RF signal received by ANT1 enters the B39 filter through the antenna switching switch 501, and the B39 filter filters the received RF signal to obtain the B39 signal, and then amplifies the signal through the third amplification module LNA3 and enters the RF transceiver module to realize the reception of the RF signal.

[0136] Alternatively, the RF front-end module 30 can use a disassembled antenna solution to receive the B40 signal, and a combined antenna solution to receive the B1 signal and the B39 signal, the switch tube SE1 is disconnected, the switch tube SE2, the switch tube SE5 and the switch tube SE7 are closed, the switch tube SH1, the switch tube SH2 and the switch tube SH5 are disconnected, the switch tube SE3, the switch tube SE4 and the switch tube SE6 are disconnected, the switch tube SH3, the switch tube SH4 and the switch tube SH6 are closed, and the first switch Q1 is switched to the contact b2; the RF signal received by ANT2 enters the B40 filter through the antenna switching switch 501, and 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 realize the reception of the RF signal.

[0137] It should be understood that the first switch Q1 and the second switch Q2 can be used to switch the receiving path, selecting a specific RF signal to enter the subsequent low-noise amplifier, and the number of filters and LNA amplifiers varies depending on the number of components. The number of components such as RF channels, switches, antennas, filters, and low-noise amplifiers in the embodiments of this application is merely illustrative; the actual number of components may be one, multiple, or even none, and this application does not impose any limitation on these numbers.

[0138] In some embodiments, the RF front-end module 50 is further connected to a controller, which is connected to the control terminals of the switches SE1-SE7 and SH1-SH6 within the antenna switching switch 501. The controller can be used to control the on / off state of various circuits within the antenna switching switch 501, and can also be used to control the switching of the receiving paths of the first switch Q1 and the second switch Q2. For example, the controller can be connected to the RF front-end module shown in FIG5 . When the controller receives an instruction to receive the B40 signal, the B1 signal, and the B39 signal using the combined antenna scheme, it controls the switches SE1, SE2, and SE5 to close, the switches SH1, SH2, and SH5 to open, the switches SE3, SE4, SE6, and SE7 to open, the switches SH3, SH4, and SH6 to close, and the first switch Q1 to switch to contact b2. The antenna switching switch 501, the first switch Q1, and the second switch Q2 can be controlled by a single controller or by multiple controllers, which is not limited in this embodiment of the present application.

[0139] It should be understood that the controller determines the target antenna corresponding to the target RF signal based on the target RF signal, and the controller controls the RF front-end module 50 to turn on the receiving path corresponding to the target antenna. The specific conduction process is that the RF front-end module 50 controls the antenna switching switch 501.

[0140] In other embodiments of the present 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 serves as the second input port ANT2_IN of the RF front-end module 50 and is connected to the second antenna ANT2.

[0141] It should be understood that the antenna switching switch structure and the RF front-end module connection structure are not limited to the above-mentioned FIG5 , and the antenna switching switch and the RF front-end module may also be other structures, which are only illustrated here.

[0142] It should be noted that the number of switch tubes SE1 to SE7, switch tubes SH1 to SH6, filters, low-noise amplifiers, etc. in the embodiments of the present application is only for illustrative purposes and is not limiting; in the RF front-end modules shown in Figures 4 and 5 above, each switch tube is illustrated using an N-channel enhancement-type MOS tube as an example. In other embodiments, the various switch tubes in Figures 4 and 5 can be replaced with other types of switch tubes such as PNP-type transistors. At this time, the various interfaces are replaced as needed, and the embodiments of the present application do not limit this.

[0143] It should be noted that in the RF front-end modules shown in Figures 2 to 5 above, the filter can be a surface acoustic wave filter (SAW), a bulk acoustic wave (BAW), or a low-temperature co-fired ceramic (LTCC) filter; the low-noise amplifier can be implemented using a Si process or a SiGe process, which is not limited in the embodiments of the present application.

[0144] FIG6 is a schematic diagram of the structure of a wireless communication system provided by way of example in an embodiment of the present application. As shown in FIG6 , 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.

[0145] The RF front-end module 601 may be any of the RF front-end modules in FIG. 2 to FIG. 5 , such as the RF front-end module 20 shown in FIG. 2 .

[0146] ANT1 and ANT2 can be used to receive RF signals, the RF front-end module 601 can be used to perform filtering, amplification, and other processing on the received RF signals, the RF transceiver module 602 can be used to receive the processed RF signals, and the controller 603 can be used to control the RF front-end module 601 to receive RF signals. The specific process of the controller 603 controlling the RF front-end module 601 to receive RF signals can be exemplified in the embodiment shown in FIG. 7 below.

[0147] It should be noted that the specific contents of ANT1 and ANT2 can be found in the relevant descriptions of ANT1 and ANT2 in Figures 2 to 5, and will not be repeated here.

[0148] It should be understood that ANT1 and ANT2 can also be used to transmit signals. This embodiment of the present application only describes the signal reception process of the wireless communication system and does not limit the other functions of ANT1 and ANT2. ANT1 and ANT2 can be antenna units that simultaneously transmit and receive multi-band signals, or a combination of multiple antenna units that transmit and receive signals in different frequency bands. This application does not specifically limit this.

[0149] Based on the wireless communication system shown in FIG6 , an embodiment of the present application further provides a method for controlling a radio frequency front-end module. This method can be executed by a controller in the wireless communication system to control the radio frequency front-end module. The radio frequency front-end module can include a single-pole single-throw switch, an antenna switching switch, a filter module, and a low-noise amplifier.

[0150] For example, the RF front-end modules in the embodiments of the present application may refer to the above-mentioned RF front-end module 20 , RF front-end module 30 , RF front-end module 40 and RF front-end module 50 .

[0151] The control method may include some or all of the following steps:

[0152] S1: The controller controls the RF front-end module to receive a target RF signal from ANT1 in response to a first instruction.

[0153] The first instruction is used to instruct the controller to control the RF front-end module to receive the target RF signal from ANT1.

[0154] Exemplarily, the wireless communication system includes the RF front-end module 30 and the first antenna ANT1 shown in FIG3 . When the controller receives an instruction to use ANT1 to receive the B40 signal, the B1 signal, and the B39 signal, the controller controls the antenna switching switch 301 to close the switches from the first input port ANT1_IN to the first output terminal Rx1, the second output terminal Rx2, and the fifth output terminal Rx5. The single-pole double-throw switch SPDT switches to contact a1, and the first switch Q1 switches to contact b2.

[0155] Exemplarily, the wireless communication system includes the RF front-end module 50 and the first antenna ANT1 shown in Figure 5. When the controller receives an instruction to use ANT1 to receive the B40 signal, the B1 signal and the B39 signal, the controller controls the switch from the first input port ANT1_IN to the first output terminal Rx1, the second output terminal Rx2 and the fifth output terminal Rx5 in 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 the contact b2.

[0156] S2: The controller controls the RF front-end module to receive the target RF signal from ANT2 in response to the second instruction.

[0157] The second instruction is used to instruct the controller to control the RF front-end module to receive the target RF signal from ANT2.

[0158] Exemplarily, the wireless communication system includes an RF front-end module 30 and a second antenna ANT2 as shown in Figure 3. When the controller receives the B40 signal received by 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 be turned off, and the single-pole double-throw switch SPDT switches to contact a1.

[0159] Exemplarily, the wireless communication system includes the RF front-end module 50 and the second antenna ANT2 shown in Figure 5. When the controller receives an instruction to use ANT2 to receive the B40 signal, the controller controls the switch from the first input port ANT1_IN to the first output port Rx1 in the antenna switching switch to be turned off, and the single-pole single-throw switch SPST is closed.

[0160] It should be noted that the embodiment of the present application does not limit the execution order of the above steps S1 and S2.

[0161] The RF front-end module (or the wireless communication system) may be installed in an electronic device. For example, the electronic device may be equipped with the wireless communication system, and the electronic device may execute the control method via the controller.

[0162] Among them, the electronic equipment can be equipped with or portable terminal devices with other operating systems, such as mobile phones, tablet computers, desktop computers, laptop computers, handheld computers, notebook computers, 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.

[0163] The following exemplifies the RF front-end module provided in the embodiment of the present application by taking a mobile phone for example to receive signals.

[0164] FIG7 is a schematic diagram of a wireless communication module in a mobile phone provided in an exemplary embodiment of the present application. The wireless communication module is used to receive signals and includes a radio frequency front-end module 701. The radio frequency front-end module 701 can be any of the aforementioned radio frequency front-end modules 20, 30, 40, and 50.

[0165] As shown in Figure 7, the wireless communication module may include ANT1, ANT2, a radio frequency module 70, and a baseband module 703. The radio frequency module 70 may include a radio frequency front-end module 701 and a radio frequency transceiver module 702. ANT1 and ANT2 are connected to the radio frequency front-end module 701, the radio frequency front-end module 701 is connected to the radio frequency transceiver module 702, and the radio frequency transceiver module 702 is connected to the baseband module 703.

[0166] ANT1 and ANT2 can be used to receive RF signals and transmit the received RF signals to the RF front-end module 701.

[0167] The RF front-end module 701 can be used to filter, amplify, and process received RF signals, and then transmit the processed RF signals to the RF transceiver module 702. The RF transceiver module 702 can be used to convert RF signals into baseband signals and transmit the baseband signals to the baseband module 703. The baseband module 703 can decode the received baseband signals, extract useful information or data, and then send them to the corresponding modules in the mobile phone, such as the Bluetooth module and the WLAN module.

[0168] In some embodiments, the wireless communication module receives Bluetooth signals or WLAN signals via antenna ANT1 , and the received Bluetooth signals or WLAN signals are processed by the RF module 70 and the baseband module 703 and sent to the Bluetooth module or WLAN module.

[0169] In other embodiments, the wireless communication module receives Bluetooth signals or WLAN signals via antenna ANT2, and the received Bluetooth signals or WLAN signals are processed by the RF module 70 and the baseband module 703 and sent to the Bluetooth module or WLAN module.

[0170] It should be understood that the wireless communication module shown in FIG7 allows the mobile phone to communicate wirelessly with terminal devices or network devices (servers, base stations), etc., to complete information interaction with other devices.

[0171] It should be noted that the flowcharts described in each embodiment of the present application are merely one embodiment. Without departing from the spirit of the present application, the steps in each flowchart may be modified or varied in various ways, such as executing the steps in the flowchart in a different order, or deleting, adding, or modifying certain steps.

[0172] In the embodiments of the present 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. For example, the connection between A and B can also be a direct connection between A and C, and C and B can be directly connected, with A and B connected through C.

[0173] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0174] In the embodiments of this application, unless otherwise specified, "a plurality of" means two or more. For example, "a plurality of nodes" means two or more nodes. "At least one" means any number, for example, one, two, or more.

[0175] “A and / or B” may refer to only A, only B, or both A and B. “At least one of A, B, and C” may refer to only A, only B, only C, or both A and B, both B and C, both A and C, or both A, B, and C. Terms such as “first,” “second,” “third,” and “fourth” in this application are used only to distinguish different objects and are not used to indicate the priority or importance of an object.

[0176] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0177] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel 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 correspond to a filtering frequency band respectively; the antenna switching switch is connected to the first antenna, and the single-pole double-throw switch is connected to the second 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 transmitted through the first antenna and the antenna switching switch or the radio frequency signal received by the second antenna to the first filter.

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

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

4. The RF front-end module according to any one of claims 1 to 3, characterized in that: The RF front-end module also includes a first amplifying module and a second amplifying module; the first amplifying module is used to amplify the RF signal output by the first filter, and the second amplifying module is used to amplify the RF signal output by the second filter.

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

6. The RF front-end module according to 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 correspond to a filtering frequency band respectively; the antenna switching switch is connected to the first antenna, and the antenna switching switch is connected to the 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.

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

9. The RF front-end module according to claim 7 or 8, characterized in that: The antenna switching switch includes a single-pole single-throw switch, a first switch tube and a second switch tube; The single-pole single-throw switch is located between the second antenna and the first filter, the first switch tube is located between the first antenna and the first filter, and the second switch tube is located between the first antenna and the second filter.

10. The radio frequency front-end module according to claim 9, characterized in that: The first switch tube is turned on when the single-pole single-throw switch is turned on; and the single-pole single-throw switch is turned off when the first switch tube is turned on.

11. The RF front-end module according to any one of claims 7 to 10, characterized in that: The antenna switching switch also includes a third switch tube and a fourth switch tube SH2; the first end of the third switch tube is connected between the first switch tube and the first filter, and the second end of the third switch tube is grounded; the first end of the fourth switch tube is connected between the second switch tube and the second filter, and the second end of the fourth switch tube is grounded.

12. The RF front-end module according to any one of claims 7 to 11, characterized in that: The RF front end includes a first amplifying module and a second amplifying module; the first amplifying module is used to amplify the RF signal output by the first filter, and the second amplifying module is used to amplify the RF signal output by the second filter.

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

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