CN215989210U - Antenna module and mobile device - Google Patents

Abstract

The application relates to the technical field of communication, in particular to an antenna module and mobile equipment. The antenna module comprises a radio frequency transceiver, at least one radio frequency power amplifier, a multiplexer, a coupler and an antenna; the radio frequency transceiver comprises a radio frequency transmitting end, a radio frequency receiving end and a feedback receiving end, and the multiplexer comprises at least one transmitting filter and at least one receiving filter; the radio frequency transmitting end is connected with the input end of the radio frequency power amplifier, the output end of the radio frequency power amplifier is connected with the input end of the transmitting filter, the radio frequency receiving end is connected with the output end of the receiving filter, the feedback receiving end is connected with the coupling end of the coupler, the output end of the transmitting filter and the input end of the receiving filter are both connected with the first end of the coupler, and the second end of the coupler is connected with the antenna; the coupler couples part of the radio frequency power output by the transmitting filter to the feedback receiving end through the coupling end. According to the technical scheme, the accuracy of transmitting the radio frequency power by the radio frequency power amplifier can be improved.

Description

Antenna module and mobile device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to an antenna module and mobile equipment.

Background

With the improvement of communication technology, the popularization of mobile electronic products has increased to an unprecedented level, and more mobile devices, such as mobile phones, smart televisions, computers and the like, become an indispensable part of the life of people.

In order to radiate radio frequency signals through an antenna during communication of a mobile device, the radio frequency signals must be amplified through a radio frequency power amplifier (radio frequency power amplifier) to obtain sufficient radio frequency power. At present, a radio frequency signal is amplified by a radio frequency power amplifier and then fed to an antenna to be radiated, and the problem that the radio frequency power transmitted by the radio frequency power amplifier is inaccurate exists.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an antenna module and a mobile device for controlling the magnitude of the rf power transmitted by the rf power amplifier and improving the accuracy of the rf power transmitted by the rf power amplifier.

The embodiment of the application provides an antenna module, which comprises a radio frequency transceiver, at least one radio frequency power amplifier, a multiplexer, a coupler and an antenna;

the radio frequency transceiver comprises a radio frequency transmitting end, a radio frequency receiving end and a feedback receiving end, and the multiplexer comprises at least one transmitting filter and at least one receiving filter;

the radio frequency transmitting end is connected with the input end of the radio frequency power amplifier, the output end of the radio frequency power amplifier is connected with the input end of the transmitting filter, the radio frequency receiving end is connected with the output end of the receiving filter, the feedback receiving end is connected with the coupling end of the coupler, the output end of the transmitting filter and the input end of the receiving filter are both connected with the first end of the coupler, and the second end of the coupler is connected with the antenna; the coupler couples part of the radio frequency power output by the transmitting filter to the feedback receiving end through the coupling end.

In one embodiment, the transmit filter and the receive filter are both band pass filters with adjustable bandwidths.

In one embodiment, the band-pass filter comprises a low-pass filter and a high-pass filter, and the center frequency point of the low-pass filter and/or the high-pass filter is adjustable.

In an embodiment, the low-pass filter comprises an adjustable capacitance and/or an adjustable inductance, and/or the high-pass filter comprises an adjustable capacitance and/or an adjustable inductance.

In one embodiment, the low-pass filter comprises two adjustable capacitors connected in parallel, wherein a first end of each adjustable capacitor is connected with a connecting lead, and a second end of each adjustable capacitor is grounded; the high-pass filter comprises two adjustable inductors which are connected in parallel, wherein the first ends of the adjustable inductors are connected with a connecting lead, and the second ends of the adjustable inductors are grounded; the connecting wire is communicated with the input end and the output end of the band-pass filter.

In one embodiment, the multiplexer is a duplexer, the at least one transmit filter includes a first transmit filter, the at least one receive filter includes a first receive filter, the radio frequency transmit end includes a first radio frequency transmit end, the radio frequency receive end includes a first radio frequency receive end, and the at least one radio frequency power amplifier includes a first radio frequency power amplifier;

the first radio frequency transmitting end is connected with the input end of the first radio frequency power amplifier, the output end of the first radio frequency power amplifier is connected with the input end of the first transmitting filter, the first radio frequency receiving end is connected with the output end of the first receiving filter, and the output end of the first transmitting filter and the input end of the first receiving filter are connected with the first end of the coupler.

In one embodiment, the multiplexer is a quadruplex multiplexer, the at least one transmitting filter includes a second transmitting filter and a third transmitting filter, the at least one receiving filter includes a second receiving filter and a third receiving filter, the radio frequency transmitting end includes a second radio frequency transmitting end and a third radio frequency transmitting end, the radio frequency receiving end includes a second radio frequency receiving end and a third radio frequency receiving end, and the at least one radio frequency power amplifier includes a second radio frequency power amplifier and a third radio frequency power amplifier;

the second radio frequency transmitting terminal is connected with the input end of the second radio frequency power amplifier, the output end of the second radio frequency power amplifier is connected with the input end of the second transmitting filter, the third radio frequency transmitting terminal is connected with the input end of the third radio frequency power amplifier, the output end of the third radio frequency power amplifier is connected with the input end of the third transmitting filter, the second radio frequency receiving terminal is connected with the output end of the second receiving filter, the third radio frequency receiving terminal is connected with the output end of the third receiving filter, the output end of the second transmitting filter, the output end of the third transmitting filter, the input end of the second receiving filter and the input end of the third receiving filter are connected with the first end of the coupler.

The embodiment of the application also provides mobile equipment comprising the antenna module provided by the embodiment of the application.

According to the antenna module provided by the embodiment of the application, the coupler is arranged between the multiplexer and the antenna, so that after the radio-frequency transceiver transmits radio-frequency signals, the radio-frequency signals are amplified by the radio-frequency power amplifier and filtered by the transmitting filter, part of output radio-frequency power is coupled back to the radio-frequency transceiver by the coupler, the radio-frequency transceiver can control the size of the radio-frequency power transmitted by the radio-frequency power amplifier according to the coupled radio-frequency power, and the accuracy of the radio-frequency power transmitted by the radio-frequency power amplifier is improved.

Drawings

Fig. 1 is a schematic structural diagram of an antenna module provided in an embodiment of the present application;

FIG. 2 is a frequency response diagram of a low pass filter provided in an embodiment of the present application;

FIG. 3 is a frequency response diagram of a high pass filter provided in an embodiment of the present application;

FIG. 4 is a schematic frequency response diagram of a bandpass filter provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an antenna module provided in an embodiment of the present application;

fig. 6 is a frequency response diagram of a duplexer provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of another antenna module provided in the embodiment of the present application;

fig. 8 is a schematic frequency response diagram of the quadplexer provided in the embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In an embodiment, as shown in fig. 1, a schematic structural diagram of an antenna module is provided, where the antenna module may be configured in a mobile device, so as to implement control of a magnitude of a radio frequency power transmitted by a radio frequency power amplifier, and improve accuracy of the radio frequency power transmitted by the radio frequency power amplifier. The mobile device may be, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices.

In this embodiment, the antenna module includes a radio frequency transceiver 1, at least one radio frequency power amplifier 2, a multiplexer 3, a coupler 4 and an antenna 5; the radio frequency transceiver 1 comprises a radio frequency transmitting terminal TX, a radio frequency receiving terminal RX and a feedback receiving terminal FB, and the multiplexer 3 comprises at least one transmitting filter 31 and at least one receiving filter 32; the radio frequency transmitting end TX is connected with the input end of the radio frequency power amplifier 2, the output end of the radio frequency power amplifier 2 is connected with the input end of the transmitting filter 31, the radio frequency receiving end RX is connected with the output end of the receiving filter 32, the feedback receiving end FB is connected with the coupling end of the coupler 4, the output end of the transmitting filter 31 and the input end of the receiving filter 32 are both connected with the first end of the coupler 4, and the second end of the coupler 4 is connected with the antenna 5; the coupler 4 couples part of the rf power output from the transmit filter 31 to the feedback receiving terminal FB through the coupling terminal.

In the above embodiment, the multiplexer 3 is used to isolate the transmitted and received rf signals, so as to ensure that both the receiving and transmitting can work normally at the same time. The bandwidth of the transmit filter 31 in the multiplexer 3 is different from the bandwidth of the receive filter 32 to avoid interference between the transmitted and received rf signals. The bandwidth of the transmitting filter 31 and the bandwidth of the receiving filter 32 are determined according to the frequency band of the transmitting rf signal and the frequency band of the receiving rf signal, respectively, so as to ensure that the bandwidth of the transmitting filter 31 covers the frequency band of the transmitting rf signal and the bandwidth of the receiving filter 32 covers the frequency band of the receiving rf signal, thereby ensuring the transmission and the reception of the rf signal. When the antenna module transmits a radio-frequency signal, the radio-frequency transceiver 1 transmits the radio-frequency signal with smaller power through a radio-frequency transmitting end TX, the radio-frequency signal is amplified through a radio-frequency power amplifier 2 to obtain a high-power radio-frequency signal, the high-power radio-frequency signal is transmitted to a first end of a coupler 4 after being filtered by a transmitting filter 31, a part of radio-frequency power is output to an antenna 5 from a second end of the coupler 4 and is radiated out through the antenna 5, and the other part of radio-frequency power is fed back to a feedback receiving end FB of the radio-frequency transceiver 1 from a coupling end of the coupler 4 and is received by the radio-frequency transceiver 1; therefore, the radio frequency transceiver 1 can determine the radio frequency power transmitted by the radio frequency power amplifier 2 according to the received radio frequency power and by combining the coupling ratio of the coupler 4, so as to determine whether the radio frequency power transmitted by the radio frequency power amplifier 2 is accurate, and if the radio frequency power transmitted by the radio frequency power amplifier 2 is inaccurate, the radio frequency power transmitted by the radio frequency power amplifier 2 can be controlled to be adjusted to the designated power, so that the accuracy of the radio frequency power transmitted by the radio frequency power amplifier 2 is improved.

Fig. 1 schematically shows only one main structure of the antenna module, and the multiplexer 3 in fig. 1 is a duplexer. In some embodiments, the multiplexer 3 may also be a triplexer or a quadruplexer, and accordingly, the radio frequency transceiver includes a plurality of radio frequency transmitting terminals TX and/or radio frequency receiving terminals RX corresponding to the multiplexer 3, and meanwhile, the radio frequency power amplifiers 2 are disposed in one-to-one correspondence with the radio frequency transmitting terminals TX.

Currently, multiplexers are all fixed bandwidth, and in some specific situations, if a good filtering effect is to be achieved, some characteristics of the multiplexers need to be sacrificed, for example, a relatively large insertion loss is caused, or attenuation of out-of-band rejection is caused because a large bandwidth is to be achieved. In addition, since the bandwidths of N77, N78, and N79 frequency bands of 5G NR (New Radio, New air interface) are very wide, for example, N77 is from 3300MHz to 4200MHz, this causes that if the filter cannot follow the channel variation, the passband of the filter is actually in the range of 3300MHz to 4200MHz, and there is no suppression, which also causes more transmission noise signals in the communication system to leak into free space, causing interference to other communication systems. In this regard, in one embodiment, the transmit filter and the receive filter are bandpass filters with tunable bandwidths. Therefore, the bandwidth of the band-pass filter can be adjusted according to the change of the channel, so that the band-pass filter can always follow the change of the channel, the maximum filtering effect is exerted, and signals except the current channel in the communication system are filtered to the maximum extent. Moreover, one multiplexer can realize the adjustment of a plurality of frequency bands, thereby avoiding using a switch to switch the frequency bands, reducing the using quantity of the multiplexer and saving the occupied area of the radio frequency device.

In one embodiment, the band-pass filter comprises a low-pass filter and a high-pass filter, and the center frequency point of the low-pass filter and/or the high-pass filter is adjustable. Illustratively, referring to fig. 1, the transmission filter 31 (band pass filter) includes a low pass filter 311 and a high pass filter 312. It will be appreciated that the positions of the low pass filter 311 and the high pass filter 312 may be adjusted to each other.

Specifically, the low-pass filter filters out a high frequency band, and the high-pass filter filters out a low frequency band, so that the low-pass filter and the high-pass filter form a band-pass filter. As can be seen from fig. 2, 3, and 4, the adjustment of the right edge of the band pass filter can be realized by adjusting the center frequency point of the low pass filter, and the adjustment of the left edge of the band pass filter can be realized by adjusting the center frequency point of the high pass filter. Therefore, the center frequency point and the bandwidth of the band-pass filter can be adjusted by adjusting the center frequency point of at least one of the low-pass filter and the high-pass filter.

In an embodiment, the low-pass filter comprises an adjustable capacitance and/or an adjustable inductance, and/or the high-pass filter comprises an adjustable capacitance and/or an adjustable inductance. In this embodiment, the resonance frequency point can be adjusted by adjusting the adjustable capacitor and/or the adjustable inductor, so as to change the center frequency point of the low-pass filter and/or the high-pass filter, and realize the adjustable broadband of the band-pass filter.

In one embodiment, the low-pass filter comprises two adjustable capacitors connected in parallel, wherein a first end of each adjustable capacitor is connected with the connecting lead, and a second end of each adjustable capacitor is grounded; the high-pass filter comprises two adjustable inductors which are connected in parallel, wherein the first ends of the adjustable inductors are connected with the connecting lead, and the second ends of the adjustable inductors are grounded; the connecting wire is communicated with the input end and the output end of the band-pass filter. Illustratively, with continued reference to fig. 1, the low pass filter 311 in the transmit filter 31 includes a first capacitor C1 and a second capacitor C2 connected in parallel, and the high pass filter 312 includes a first inductor L1 and a second inductor L2 connected in parallel; the low pass filter in the receiving filter 32 includes a third capacitor C3 and a fourth capacitor C4 connected in parallel, and the high pass filter includes a third inductor L3 and a fourth inductor L4 connected in parallel.

Based on the above technical solution, in a specific embodiment, the multiplexer is a duplexer, the at least one transmitting filter includes a first transmitting filter, the at least one receiving filter includes a first receiving filter, the radio frequency transmitting end includes a first radio frequency transmitting end, the radio frequency receiving end includes a first radio frequency receiving end, and the at least one radio frequency power amplifier includes a first radio frequency power amplifier; the first radio frequency transmitting end is connected with the input end of a first radio frequency power amplifier, the output end of the first radio frequency power amplifier is connected with the input end of a first transmitting filter, the first radio frequency receiving end is connected with the output end of a first receiving filter, and the output end of the first transmitting filter and the input end of the first receiving filter are both connected with the first end of the coupler.

Exemplarily, as shown in fig. 5, the antenna module includes a transmission filter 1, a first radio frequency power amplifier 21, a multiplexer 3, a coupler 4, and an antenna 5; the radio frequency transceiver 1 comprises a first radio frequency transmitting terminal TX1, a first radio frequency receiving terminal RX1 and a feedback receiving terminal FB, and the multiplexer 3 comprises a first transmitting filter 310 and a first receiving filter 310'; the first radio frequency transmitting terminal TX1 is connected to the input terminal of the first radio frequency power amplifier 21, the output terminal of the first radio frequency power amplifier 21 is connected to the input terminal of the first transmitting filter 310, the first radio frequency receiving terminal RX1 is connected to the output terminal of the first receiving filter 310 ', the feedback receiving terminal FB is connected to the coupling terminal of the coupler 4, the output terminal of the first transmitting filter 310 and the input terminal of the first receiving filter 310' are both connected to the first terminal of the coupler 4, and the second terminal of the coupler 4 is connected to the antenna 5; the coupler 4 couples a part of the rf power output by the first transmit filter 310 to the feedback receiving terminal FB through the coupling terminal. The first transmit filter 310 includes a first low-pass filter 3101 and a first high-pass filter 3102, the first low-pass filter 3101 includes a first sub-capacitor C1_1 and a second sub-capacitor C1_2 connected in parallel, and the first high-pass filter 3102 includes a first sub-inductor L1_1 and a second sub-inductor L1_2 connected in parallel; the first receiving filter 310 ' includes a second low-pass filter 3101 ' and a second high-pass filter 3102 ', the second low-pass filter 3101 ' includes a third sub-capacitor C1_3 and a fourth sub-capacitor C1_4 connected in parallel, and the second high-pass filter 3102 ' includes a third sub-inductor L1_3 and a fourth sub-inductor L1_4 connected in parallel. Referring to fig. 6, the frequency response of the multiplexer 3 (duplexer) can be adjusted by adjusting the first sub-capacitor C1_1, the second sub-capacitor C1_2, the first sub-inductor L1_1, the second sub-inductor L1_2, the third sub-capacitor C1_3, the fourth sub-capacitor C1_4, the third sub-inductor L1_3, and the fourth sub-inductor L1_4, as shown by the dashed lines, so as to achieve the adjustment of the center frequency point and the bandwidth of the duplexer.

Based on the above technical solution, in a specific embodiment, the multiplexer is a quadruplex multiplexer, the at least one transmitting filter includes a second transmitting filter and a third transmitting filter, the at least one receiving filter includes a second receiving filter and a third receiving filter, the radio frequency transmitting end includes a second radio frequency transmitting end and a third radio frequency transmitting end, the radio frequency receiving end includes a second radio frequency receiving end and a third radio frequency receiving end, and the at least one radio frequency power amplifier includes a second radio frequency power amplifier and a third radio frequency power amplifier; the second radio frequency transmitting end is connected with the input end of a second radio frequency power amplifier, the output end of the second radio frequency power amplifier is connected with the input end of a second transmitting filter, the third radio frequency transmitting end is connected with the input end of a third radio frequency power amplifier, the output end of the third radio frequency power amplifier is connected with the input end of a third transmitting filter, the second radio frequency receiving end is connected with the output end of a second receiving filter, the third radio frequency receiving end is connected with the output end of a third receiving filter, and the output end of the second transmitting filter, the output end of the third transmitting filter, the input end of the second receiving filter and the input end of the third receiving filter are connected with the first end of the coupler.

Exemplarily, as shown in fig. 7, the antenna module includes a transmission filter 1, a second radio frequency power amplifier 22, a third radio frequency power amplifier 23, a multiplexer 3, a coupler 4, and an antenna 5; the radio frequency transceiver 1 comprises a second radio frequency transmitting terminal TX2, a second radio frequency receiving terminal RX2, a third radio frequency transmitting terminal TX3, a third radio frequency receiving terminal RX3 and a feedback receiving terminal FB, and the multiplexer 3 comprises a second transmitting filter 320, a second receiving filter 320 ', a third transmitting filter 330 and a third receiving filter 330'; the second radio frequency transmitting terminal TX2 is connected to the input terminal of the second radio frequency power amplifier 22, the output terminal of the second radio frequency power amplifier 22 is connected to the input terminal of the second transmitting filter 320, the third radio frequency transmitting terminal TX3 is connected to the input terminal of the third radio frequency power amplifier 23, the output terminal of the third radio frequency power amplifier 23 is connected to the input terminal of the third transmitting filter 330, the second radio frequency receiving terminal RX2 is connected to the output terminal of the second receiving filter 320 ', the third radio frequency receiving terminal RX3 is connected to the output terminal of the third receiving filter 330', the feedback receiving terminal FB is connected to the coupling terminal of the coupler 4, the output terminal of the second transmitting filter 320, the input terminal of the second receiving filter 320 ', the output terminal of the third transmitting filter 330 and the input terminal of the third receiving filter 330' are all connected to the first terminal of the coupler 4, and the second terminal of the coupler 4 is connected to the antenna 5; the coupler 4 couples part of the rf power output by the second transmit filter 320 or part of the rf power output by the third transmit filter 330 to the feedback receiving terminal FB through the coupling terminal. The second transmit filter 320 includes a third low-pass filter 3201 and a third high-pass filter 3202, the third low-pass filter 3201 includes a fifth sub-capacitor C2_1 and a sixth sub-capacitor C2_2 connected in parallel, and the third high-pass filter 3202 includes a fifth sub-inductor L2_1 and a sixth sub-inductor L2_2 connected in parallel; the second receiving filter 320 ' includes a fourth low-pass filter 3201 ' and a fourth high-pass filter 3202 ', the fourth low-pass filter 3201 ' includes a seventh sub-capacitor C2_3 and an eighth sub-capacitor C2_4 connected in parallel, and the fourth high-pass filter 3202 ' includes a seventh sub-inductor L2_3 and an eighth sub-inductor L2_4 connected in parallel; the third transmitting filter 330 includes a fifth low-pass filter 3301 and a fifth high-pass filter 3302, the fifth low-pass filter 3301 includes a ninth sub-capacitor C3_1 and a tenth sub-capacitor C3_2 connected in parallel, and the fifth high-pass filter 3302 includes a ninth sub-inductor L3_1 and a tenth sub-inductor L3_2 connected in parallel; the fifth receiving filter 330 ' includes a sixth low pass filter 3301 ' and a sixth high pass filter 3302 ', the sixth low pass filter 3301 ' includes an eleventh sub-capacitor C3_3 and a twelfth sub-capacitor C3_4 connected in parallel, and the sixth high pass filter 3302 ' includes an eleventh sub-inductor L3_3 and a twelfth sub-inductor L3_4 connected in parallel. The frequency response of the multiplexer 3 (quadplexer) can be seen in fig. 8, and the adjustment of the center frequency point and the bandwidth of the duplexer can be realized by adjusting the fifth sub-capacitor C2_1, the sixth sub-capacitor C2_2, the fifth sub-inductor L2_1, the sixth sub-inductor L2_2, the seventh sub-capacitor C2_3, the eighth sub-capacitor C2_4, the seventh sub-inductor L2_3, the eighth sub-inductor L2_4, the ninth sub-capacitor C3_1, the tenth sub-capacitor C3_2, the ninth sub-inductor L3_1, the tenth sub-inductor L3_2, the eleventh sub-capacitor C3_3, the twelfth sub-capacitor C3_4, the eleventh sub-inductor L3_3, and the twelfth sub-inductor L3_4, as shown by dotted lines. The quadruplex ware in the antenna module that this embodiment provided can realize the regulation between B1+ B3 frequency channel and B25+ B66 frequency channel, and two routes transmitting signal can send simultaneously, and two routes received signal can receive simultaneously, realize the Carrier Aggregation (CA) of two routes signal, or 4G-5G double connection (ENDC).

In the above embodiment, the coupler is disposed between the multiplexer and the antenna, so that after the radio-frequency transceiver transmits the radio-frequency signal, the radio-frequency signal is amplified by the radio-frequency power amplifier and filtered by the transmit filter, and a part of the output radio-frequency power is coupled back to the radio-frequency transceiver by the coupler, so that the radio-frequency transceiver can control the size of the radio-frequency power transmitted by the radio-frequency power amplifier according to the coupled radio-frequency power, and the accuracy of the radio-frequency power transmitted by the radio-frequency power amplifier is improved.

In one embodiment, a mobile device is provided, and the mobile device includes the antenna module provided in the embodiment of the application. The mobile device can be various personal computers, notebook computers, smart phones, tablet computers, portable wearable devices and the like.

The mobile device provided by the embodiment comprises the antenna module provided by the embodiment, and has corresponding functions and beneficial effects.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (8)

1. An antenna module is characterized by comprising a radio frequency transceiver, at least one radio frequency power amplifier, a multiplexer, a coupler and an antenna;

the radio frequency transceiver comprises a radio frequency transmitting end, a radio frequency receiving end and a feedback receiving end, and the multiplexer comprises at least one transmitting filter and at least one receiving filter;

the radio frequency transmitting end is connected with the input end of the radio frequency power amplifier, the output end of the radio frequency power amplifier is connected with the input end of the transmitting filter, the radio frequency receiving end is connected with the output end of the receiving filter, the feedback receiving end is connected with the coupling end of the coupler, the output end of the transmitting filter and the input end of the receiving filter are both connected with the first end of the coupler, and the second end of the coupler is connected with the antenna; the coupler couples part of the radio frequency power output by the transmitting filter to the feedback receiving end through the coupling end.

2. The antenna module of claim 1, wherein the transmit filter and the receive filter are bandpass filters with adjustable bandwidths.

3. The antenna module according to claim 2, wherein the band-pass filter comprises a low-pass filter and a high-pass filter, and a center frequency point of the low-pass filter and/or the high-pass filter is adjustable.

4. The antenna module according to claim 3, wherein the low-pass filter comprises an adjustable capacitance and/or an adjustable inductance, and/or the high-pass filter comprises an adjustable capacitance and/or an adjustable inductance.

5. The antenna module as claimed in claim 4, wherein the low pass filter comprises two tunable capacitors connected in parallel, a first end of the tunable capacitor is connected to the connecting wire, and a second end of the tunable capacitor is grounded; the high-pass filter comprises two adjustable inductors which are connected in parallel, wherein the first ends of the adjustable inductors are connected with a connecting lead, and the second ends of the adjustable inductors are grounded; the connecting wire is communicated with the input end and the output end of the band-pass filter.

6. The antenna module of any one of claims 1 to 5, wherein the multiplexer is a duplexer, the at least one transmit filter comprises a first transmit filter, the at least one receive filter comprises a first receive filter, the RF transmit end comprises a first RF transmit end, the RF receive end comprises a first RF receive end, and the at least one RF power amplifier comprises a first RF power amplifier;

the first radio frequency transmitting end is connected with the input end of the first radio frequency power amplifier, the output end of the first radio frequency power amplifier is connected with the input end of the first transmitting filter, the first radio frequency receiving end is connected with the output end of the first receiving filter, and the output end of the first transmitting filter and the input end of the first receiving filter are connected with the first end of the coupler.

7. The antenna module of any one of claims 1 to 5, wherein the multiplexer is a quadplexer, the at least one transmit filter includes a second transmit filter and a third transmit filter, the at least one receive filter includes a second receive filter and a third receive filter, the RF transmit end includes a second RF transmit end and a third RF transmit end, the RF receive end includes a second RF receive end and a third RF receive end, and the at least one RF power amplifier includes a second RF power amplifier and a third RF power amplifier;

the second radio frequency transmitting terminal is connected with the input end of the second radio frequency power amplifier, the output end of the second radio frequency power amplifier is connected with the input end of the second transmitting filter, the third radio frequency transmitting terminal is connected with the input end of the third radio frequency power amplifier, the output end of the third radio frequency power amplifier is connected with the input end of the third transmitting filter, the second radio frequency receiving terminal is connected with the output end of the second receiving filter, the third radio frequency receiving terminal is connected with the output end of the third receiving filter, the output end of the second transmitting filter, the output end of the third transmitting filter, the input end of the second receiving filter and the input end of the third receiving filter are connected with the first end of the coupler.

8. A mobile device comprising the antenna module of any one of claims 1 to 7.

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