CN115037317B

CN115037317B - Radio frequency LFEM device, radio frequency system and communication equipment

Info

Publication number: CN115037317B
Application number: CN202210721392.5A
Authority: CN
Inventors: 张亭
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2023-11-10
Anticipated expiration: 2042-06-24
Also published as: CN115037317A

Abstract

The embodiment of the application relates to a radio frequency LFEM device, a radio frequency system and communication equipment, wherein the radio frequency LFEM device is configured with a first antenna port and at least three first auxiliary ports and comprises a first selection module, a first receiving module and a second receiving module; two first ends of the first selection module are connected with the first receiving module, the other first end of the first selection module is connected with the second receiving module, and the second end of the first selection module is connected with the first antenna port; the first receiving module is used for receiving the first target signal and the second target signal from the first selecting module and receiving the third target signal from the first auxiliary port; the second receiving module is used for receiving the third target signal from the first selecting module, receiving the first target signal from one first auxiliary port and receiving the second target signal from the other first auxiliary port.

Description

Radio frequency LFEM device, radio frequency system and communication equipment

Technical Field

The embodiment of the application relates to the technical field of radio frequency, in particular to a radio frequency LFEM device, a radio frequency system and communication equipment.

Background

Along with the continuous development of communication technology and the continuous change of communication scene, the communication frequency band, communication mode and the like of the communication equipment need to be correspondingly changed at any time, so that more abundant communication functions are realized. However, the radio frequency LFEM devices in the prior art have failed to meet the increasingly complex communication needs of users.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a radio frequency LFEM device, a radio frequency system, and a communication apparatus with rich communication functions.

In a first aspect, the present application provides a radio frequency LFEM device configured with a first antenna port and at least three first auxiliary ports, the radio frequency LFEM device comprising a first selection module, a first receiving module and a second receiving module;

two first ends of the first selection module are connected with the first receiving module, the other first end of the first selection module is connected with the second receiving module, the second end of the first selection module is connected with the first antenna port, the first selection module is used for receiving the medium-high frequency signals from the first antenna port, and selecting to transmit a first target signal and a second target signal in the medium-high frequency signals to the first receiving module, and/or transmitting a third target signal in the medium-high frequency signals to the second receiving module;

The first receiving module is further connected to one of the first auxiliary ports, and is configured to receive a first target signal and a second target signal from the first selecting module, and receive a third target signal from the first auxiliary port, where frequency bands of the first target signal, the second target signal, and the third target signal are different from each other;

the second receiving module is further connected to the other two first auxiliary ports, and is configured to perform receiving processing on the third target signal from the first selecting module, perform receiving processing on the first target signal from one of the first auxiliary ports, and perform receiving processing on the second target signal from the other one of the first auxiliary ports.

In a second aspect, the present application provides a radio frequency system comprising:

as mentioned above, the first antenna port of the radio frequency LFEM device is used for connecting with a first antenna;

the radio frequency DiFEM device is configured with at least three transmission ports and a third antenna port for connecting a second antenna, the three transmission ports are respectively connected with the three first auxiliary ports of the radio frequency LFEM device in a one-to-one correspondence manner, and the radio frequency DiFEM device is used for receiving the medium-high frequency MIMO signals from the third antenna port and respectively transmitting the first target signal, the second target signal and the third target signal in the medium-high frequency MIMO signals to the three transmission ports in a one-to-one correspondence manner.

In a third aspect, the application provides a communication device comprising a radio frequency system as described above.

The radio frequency LFEM device can select 3CA receiving processing of target signals of three frequency bands and can select 2CA MIMO receiving processing of target signals of any two frequency bands. Therefore, the radio frequency LFEM device of the embodiment of the application can select the corresponding communication frequency band according to the actual communication scene, thereby improving the flexibility of the radio frequency LFEM device and realizing more abundant signal receiving and processing functions.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic diagram of a radio frequency LFEM device 10 according to an embodiment;

FIG. 2 is a second schematic diagram of an embodiment of a RF LFEM device 10;

FIG. 3 is a third schematic diagram of an embodiment of a radio frequency LFEM device;

FIG. 4 is a schematic diagram of a radio frequency LFEM device according to an embodiment;

FIG. 5 is a schematic diagram of a radio frequency LFEM device according to an embodiment;

FIG. 6 is a schematic diagram of a radio frequency LFEM device according to an embodiment;

FIG. 7 is a schematic diagram of a radio frequency LFEM device according to an embodiment;

FIG. 8 is a schematic diagram of an RF system according to an embodiment;

FIG. 9 is a schematic diagram of a second embodiment of a radio frequency system;

FIG. 10 is a third schematic diagram of an RF system according to an embodiment;

FIG. 11 is a fourth schematic diagram of an RF system according to an embodiment;

fig. 12 is a schematic diagram of a radio frequency system according to an embodiment.

Description of element numbers:

radio frequency LFEM device: 10; a first selection module: 110; a first antenna switch: 111; a first combiner: 112; a first filter: 113; a second filter: 114. And a third filter: 115; a first receiving module: 120; a first amplifying unit: 121; a second amplifying unit: 122, a step of; a first switching unit: 123, a step of; a first radio frequency switch: 1231; a second radio frequency switch: 1232; and a third radio frequency switch: 1233; and a second receiving module: 130; a third amplifying unit: 131; fourth amplifying unit: 132, a part of the material; a second switching unit: 133; fourth radio frequency switch: 1331; fifth radio frequency switch: 1332; sixth radio frequency switch: 1333; and a third receiving module: 140; a second selection module: 150; rf DiFEM device: 20, a step of; a second antenna switch: 210; and a third combiner: 220; a fourth filter: 230, a step of; a fifth filter: 240, a step of; a sixth filter: 250; a radio frequency transceiver: 30; seventh radio frequency switch: 410; eighth radio frequency switch: 420; a second combiner: 430; a seventh filter: 440; a radio frequency transceiver: 30.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first target signal may be referred to as a second target signal, and similarly, a second target signal may be referred to as a first target signal, without departing from the scope of the application. Both the first target signal and the second target signal are target signals, but they are not the same target signal.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined otherwise.

The radio frequency LFEM device related to the embodiment of the application is of a packaging structure and can be used for constructing a radio frequency system. The radio frequency system may be applied to a communication device having a wireless communication function, which may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices.

Fig. 1 is one of schematic structural diagrams of a radio frequency LFEM device 10 according to an embodiment, referring to fig. 1, in one embodiment, the radio frequency LFEM device 10 is configured with a first antenna port and at least three first auxiliary ports aux_mhb, and the radio frequency LFEM device 10 includes a first selection module 110, a first receiving module 120 and a second receiving module 130. The first antenna port is used for being connected with an antenna, and the first auxiliary port AUX_MHB is used for being connected with an external device so as to receive radio frequency signals from the antenna or from the external device. The external device may be an independent device such as a filter, a radio frequency switch, or an integrated device such as a radio frequency PAMid device, which is not limited in this embodiment. The radio frequency LFEM device 10 may be further configured with an output port for connection to a radio frequency transceiver to transmit the received processed signal to the radio frequency transceiver.

Two first ends of the first selection module 110 are connected to the first receiving module 120, another first end of the first selection module 110 is connected to the second receiving module 130, and a second end of the first selection module 110 is connected to the first antenna port. The first selection module 110 is configured to receive a medium-high frequency signal from the first antenna port, where the medium-high frequency signal is a carrier aggregation (Carrier Aggregation, CA) signal. That is, the mid-high frequency signal received by the first selection module 110 is formed by signal aggregation of a plurality of frequency bands. The first selection module 110 can split the carrier aggregation signal into a plurality of signals with different frequency bands, and transmit the signals with different frequency bands to different ports respectively. Therefore, in this embodiment, the first selecting module 110 is configured to select to transmit the first target signal and the second target signal of the mid-high frequency signals to the first receiving module 120, and/or transmit the third target signal of the mid-high frequency signals to the second receiving module 130, where frequency bands of the first target signal, the second target signal, and the third target signal are different from each other. That is, the first selection module 110 may select to transmit only the first target signal and the second target signal to the first receiving module 120, may select to transmit only the third target signal to the first receiving module 120, and may also select to simultaneously transmit the first target signal, the second target signal and the third target signal to the corresponding receiving modules respectively, where a specific signal transmission manner is determined according to the received medium-high frequency signals in an actual scene. Specifically, the medium-high frequency signal may include an intermediate frequency signal and a high frequency signal among the 4G LTE signal, the 5G NR signal. The intermediate frequency signal may include radio frequency signals of at least one intermediate frequency band, for example, radio frequency signals of bands including B1, B3, B66, B25, B34, B39, and the like. The high frequency signals may include radio frequency signals of at least one high frequency band, such as radio frequency signals of bands including B7, B40, B41, etc. In the embodiments of the present application, the first target signal is a radio frequency signal in the B1 frequency band, the second target signal is a radio frequency signal in the B7 frequency band, and the third target signal is a radio frequency signal in the B3 frequency band.

The first receiving module 120 is further connected to one of the first auxiliary ports aux_mhb. The first receiving module 120 is configured to perform a receiving process on the first target signal and the second target signal from the first selecting module 110, and perform a receiving process on the third target signal from the first auxiliary port aux_mhb. Wherein the first receiving module 120 has at least two outputs. In the embodiment shown in fig. 1, the first receiving module 120 has two output ends, and further includes a receiving processing circuit connected to each output end, so that the first receiving module 120 can receive and process two paths of signals at the same time, and transmit the processed signals to the radio frequency transceiver through different ports. Illustratively, the first receiving module 120 may perform receiving processing on the first target signal from the first selecting module 110 and the third target signal from the first auxiliary port aux_mhb at the same time. In other embodiments, the first receiving module 120 may also have three output terminals, and may perform receiving processing on three signals based on corresponding receiving processing circuits, so as to implement more complex receiving functions.

It may be appreciated that the specific frequency band included in the mid-high frequency signal received by the first selection module 110 is determined by a signal transmitting end (e.g., a base station), and the mid-high frequency signal may include only one of the first target signal and the second target signal. For example, the mid-high frequency signal may include only the first target signal. In this case, even though the first selection module 110 selects to transmit the first target signal and the second target signal to the first reception module 120, substantially only the first target signal reaches the first reception module 120. Accordingly, the first receiving module 120 only needs to perform receiving processing on the first target signal, and does not need to perform receiving processing on the second target signal. Moreover, the processor may learn the frequency band of the current received signal of the radio frequency LFEM device, and regulate the receiving processing path of the first receiving module 120, so as to disconnect the receiving processing path of the second target signal, thereby improving the device usage rate in the first receiving module 120, and further improving the receiving rate of the radio frequency LFEM device.

The second receiving module 130 is further connected to two other first auxiliary ports aux_mhb, respectively. The second receiving module 130 is configured to perform a receiving process on the third target signal from the first selecting module 110, perform a receiving process on the first target signal from one of the first auxiliary ports aux_mhb, and perform a receiving process on the second target signal from the other of the first auxiliary ports aux_mhb.

Based on the above structure, the radio frequency LFEM device of the present embodiment can select 3CA reception processing for target signals of three frequency bands, and can select 2CA MIMO reception processing for target signals of any two frequency bands. The 3CA receiving process refers to receiving a carrier aggregation signal including three frequency bands, splitting the signal of each frequency band, and then synchronously receiving the signals of the three frequency bands. Specifically, in the first scenario, the first receiving module 120 may perform receiving processing on the first target signal and the second target signal from the first selecting module 110, and the second receiving module 130 may perform receiving processing on the third target signal from the first selecting module 110, so that the radio frequency LFEM device may perform 3CA receiving processing on the medium-high frequency signal from the same antenna. In the second scenario, the first receiving module 120 may perform receiving processing on the third target signal from one first auxiliary port aux_mhb, and the second receiving module 130 may perform receiving processing on the first target signal and the second target signal from the other two first auxiliary ports aux_mhb, respectively, so that the radio frequency LFEM device may perform 3CA receiving processing on the medium-high frequency signal from the external device. In the third scenario, the first receiving module 120 may perform receiving processing on the first target signal and the second target signal from the first selecting module 110, and the second receiving module 130 may perform MIMO receiving processing on the first target signal and the second target signal from the two first auxiliary ports aux_mhb, respectively, so that the radio frequency LFEM device may implement 2CA MIMO receiving processing on the first target signal and the second target signal. In the fourth scenario, the first receiving module 120 may perform a receiving process on the first target signal from the first selecting module 110 and perform a MIMO receiving process on the third target signal from one first auxiliary port aux_mhb, and the second receiving module 130 may perform a receiving process on the third target signal from the first selecting module 110 and perform a MIMO receiving process on the first target signal from the other first auxiliary port aux_mhb, respectively, so that the radio frequency LFEM device may implement a 2CA MIMO receiving process on the first target signal and the third target signal. In a fifth scenario, the first receiving module 120 may perform receiving processing on the second target signal from the first selecting module 110 and perform MIMO receiving processing on the third target signal from one first auxiliary port aux_mhb, and the second receiving module 130 may perform receiving processing on the third target signal from the first selecting module 110 and perform MIMO receiving processing on the second target signal from the other first auxiliary port aux_mhb, respectively, so that the radio frequency LFEM device may implement 2CA MIMO receiving processing on the second target signal and the third target signal. Therefore, the radio frequency LFEM device of the embodiment can select the corresponding communication frequency band according to the actual communication scene, so that the flexibility of the radio frequency LFEM device is improved, and a richer signal receiving and processing function is realized.

Fig. 2 is a second schematic structural diagram of the radio frequency LFEM device 10 according to an embodiment, referring to fig. 2, in one embodiment, the first selecting module 110 includes a first antenna switch 111, a first combiner 112 and a first filter 113.

Wherein the first antenna switch 111 comprises a plurality of first terminals and a second terminal. The second end of the first antenna switch 111 is connected to the first antenna port, and the first antenna switch 111 is configured to selectively conduct a signal transmission path between at most two first ends and the second end, so as to transmit the received medium-high frequency signal to the conducted first ends. An antenna switch (Antenna Switch Module, ASM) refers to a switch for directly connecting an antenna, which is capable of transmitting radio frequency signals from a second terminal to a plurality of first terminals simultaneously. In addition, compared with the related art that the antenna is connected by the radio frequency switch and the signal from the antenna is transmitted to the multiplexer, the antenna switch has higher voltage withstand capability than the conventional radio frequency switch, and is more suitable for the use scene of carrier aggregation signals with multiple frequency bands. Therefore, by adopting the antenna switch, the embodiment not only can realize synchronous processing of signals in each frequency band in the carrier aggregation signal, but also can effectively reduce loss, thereby improving the receiving performance of the radio frequency LFEM device on radio frequency signals.

Two first ends of the first combiner 112 are respectively connected to the first receiving module 120 and the second receiving module 130, and a second end of the first combiner 112 is connected to one first end of the first antenna switch 111. The first combiner 112 is configured to transmit a first target signal of the received mid-high frequency signals to the first receiving module 120, and transmit a third target signal of the received mid-high frequency signals to the second receiving module 130. The first filter 113 is connected to the other first end of the first antenna switch 111 and the first receiving module 120, and the first filter 113 is used for transmitting a second target signal in the received mid-high frequency signal to the first receiving module 120. It will be appreciated that the insertion loss of both the combiner and the filter is lower than that of the triplexer. Therefore, the combined structure of the first combiner 112 and the first filter 113 is adopted in the present embodiment under the premise of space allowance in the radio frequency LFEM device, so that loss on the path can be effectively reduced, and the receiving performance of the medium-high frequency signal from the first antenna port is improved.

With continued reference to fig. 2, in one embodiment, the first receiving module 120 includes a first amplifying unit 121, a second amplifying unit 122, and a first switching unit 123. The first amplifying unit 121 is configured to amplify the received second target signal and the third target signal. Specifically, the first amplifying unit 121 may receive one of the second target signal and the third target signal at one time, and may be capable of performing an amplifying process on the received target signal. The second amplifying unit 122 is configured to amplify the received first target signal and the third target signal. Similarly, the second amplifying unit 122 may receive one of the first target signal and the third target signal at a time and may perform an amplifying process on the received target signal. The frequency bands of the signals received by the first amplifying unit 121 and the second amplifying unit 122 may be the same or different, and are specifically determined according to the receiving requirements in the actual scenario. The first switching unit 123 includes two first terminals and at least three second terminals, which may be, for example, DP3T switches. Two first ends of the first switch unit 123 are respectively connected with the first amplifying unit 121 and the second amplifying unit 122 in a one-to-one correspondence, and three second ends of the first switch unit 123 are respectively connected with the first auxiliary port aux_mhb for transmitting the third target signal, the first end for transmitting the first target signal by the first combiner 112, and the first filter 113 in a one-to-one correspondence. The first switching unit 123 is configured to control the signal receiving path so as to select the signal transmitted to the first amplifying unit 121 and the signal transmitted to the second amplifying unit 122, respectively. Alternatively, the first amplifying unit 121 and the second amplifying unit 122 may include one low noise amplifier (Low Noise Amplifier, LNA) respectively, and may include other filtering elements, etc., which is not limited in this embodiment.

With continued reference to fig. 2, in one embodiment, the second receiving module 130 includes a third amplifying unit 131, a fourth amplifying unit 132, and a second switching unit 133. The third amplifying unit 131 is configured to amplify the received first target signal and the third target signal. Specifically, the third amplifying unit 131 may receive one of the first target signal and the third target signal at one time, and may be capable of amplifying the received target signal. The fourth amplifying unit 132 is configured to amplify the received second target signal and the third target signal. Similarly, the fourth amplifying unit 132 may receive one of the second target signal and the third target signal at one time and may perform an amplifying process on the received target signal. The frequency bands of the signals received by the third amplifying unit 131 and the fourth amplifying unit 132 may be the same or different, and are specifically determined according to the receiving requirements in the actual scenario. The second switching unit 133 includes two first terminals and at least three second terminals, which may be, for example, DP3T switches. Two first ends of the second switch unit 133 are respectively connected with the third amplifying unit 131 and the fourth amplifying unit 132 in a one-to-one correspondence, one second end of the second switch unit 133 is connected with the first end of the first combiner 112 for transmitting the third target signal, and the other two second ends of the second switch unit 133 are respectively connected with the two first auxiliary ports aux_mhb for transmitting the first target signal and the second target signal in a one-to-one correspondence. The second switching unit 133 is used to control the signal receiving path so as to select the signal transmitted to the third amplifying unit 131 and the signal transmitted to the fourth amplifying unit 132, respectively. Alternatively, the third amplifying unit 131 and the fourth amplifying unit 132 may include one low noise amplifier (Low Noise Amplifier, LNA) respectively, or may include other filtering elements, etc., which is not limited in this embodiment.

Fig. 3 is a third schematic diagram of the rf LFEM device according to an embodiment, referring to fig. 3, in one embodiment, the first switch unit 123 includes a first rf switch 1231, a second rf switch 1232, and a third rf switch 1233.

Wherein a second terminal of the first radio frequency switch 1231 is connected to the first auxiliary port aux_mhb transmitting the third target signal. The first end of the second rf switch 1232 is connected to the first amplifying unit 121, and the two second ends of the second rf switch 1232 are respectively connected to the first end of the first selecting module 110, which outputs the second target signal, and one first end of the first rf switch 1231 in a one-to-one correspondence manner. The first end of the third rf switch 1233 is connected to the second amplifying unit 122, and two second ends of the third rf switch 1233 are respectively connected to the first end of the first selecting module 110 outputting the first target signal and another first end of the first rf switch 1231 in a one-to-one correspondence manner. Specifically, when the first terminal of the second radio frequency switch 1232 is turned on to connect the second terminal of the first selection module 110, the first amplification unit 121 may amplify the second target signal from the first selection module 110. When the first terminal of the second radio frequency switch 1232 is turned on to connect the second terminal of the first radio frequency switch 1231, the first amplifying unit 121 may amplify the third target signal from the first auxiliary port aux_mhb. When the first terminal of the third radio frequency switch 1233 is turned on to connect the second terminal of the first radio frequency switch 1231, the second amplifying unit 122 may amplify the third target signal from the first auxiliary port aux_mhb. When the first terminal of the second radio frequency switch 1232 is turned on to connect the second terminal of the first selection module 110, the second amplification unit 122 may amplify the third target signal from the first auxiliary port aux_mhb. In the present embodiment, the first switching unit 123 is configured by using a plurality of independent radio frequency switches having a small volume, wherein the switch having a small volume may be disposed in a gap between large-volume devices such as a low noise amplifier. Compared with the whole DP3T switch, the arrangement mode of the embodiment can realize the utilization of the space, and improves the space utilization rate in the device, thereby reducing the volume of the radio frequency LFEM device.

With continued reference to fig. 3, in one embodiment, the second switching unit 133 includes a fourth rf switch 1331, a fifth rf switch 1332, and a sixth rf switch 1333. A second terminal of the fourth rf switch 1331 is connected to the first auxiliary port aux_mhb that transmits the first target signal. The first end of the fifth rf switch 1332 is connected to the third amplifying unit 131, and two second ends of the fifth rf switch 1332 are respectively connected to the first end of the first selecting module 110 outputting the third target signal and one first end of the fourth rf switch 1331 in a one-to-one correspondence manner. A first end of the sixth rf switch 1333 is connected to the fourth amplifying unit 132, and two second ends of the sixth rf switch 1333 are respectively connected to another first end of the fourth rf switch 1331 and the first auxiliary port aux_mhb for transmitting the second target signal in a one-to-one correspondence manner. Specifically, when the first terminal of the fifth radio frequency switch 1332 is turned on to connect the second terminal of the first selection module 110, the third amplification unit 131 may amplify the third target signal from the first selection module 110. When the first terminal of the fifth rf switch 1332 is turned on to connect the second terminal of the fourth rf switch 1331, the third amplifying unit 131 may amplify the first target signal from the first auxiliary port aux_mhb. The fourth amplifying unit 132 may amplify the first target signal from the first auxiliary port aux_mhb when the first terminal of the sixth radio frequency switch 1333 is turned on to connect the second terminal of the fourth radio frequency switch 1331. The fourth amplifying unit 132 may amplify the second target signal from the first auxiliary port aux_mhb when the first terminal of the fifth radio frequency switch 1332 is turned on to connect the second terminal of the first selecting module 110. In the present embodiment, the second switching unit 133 is constituted by a plurality of independent radio frequency switches having a small volume, wherein the switch having a small volume can be disposed in a gap between large-volume devices such as a low noise amplifier. Compared with the whole DP3T switch, the arrangement mode of the embodiment can realize the utilization of the space, and improves the space utilization rate in the device, thereby reducing the volume of the radio frequency LFEM device.

Fig. 4 is a schematic structural diagram of a radio frequency LFEM device according to an embodiment, and referring to fig. 4, in one embodiment, the first selecting module 110 further includes a second filter 114.

The second filter 114 is connected to one first end of the first antenna switch 111 and the other second end of the second radio frequency switch 1232, and the second filter 114 is configured to transmit a fourth target signal of the received mid-high frequency signal to the second radio frequency switch 1232, where the frequency bands of the fourth target signal and the first target signal, the second target signal, and the third target signal are different. Illustratively, the fourth target signal may be a radio frequency signal in the B41 band. Based on the structure of the present embodiment, the radio frequency LFEM device may implement 4CA reception processing of the first target signal, the second target signal, the third target signal, and the fourth target signal.

Further, the sixth rf switch 1333 may have a second terminal connected to the first auxiliary port aux_mhb and receive the fourth target signal from the first auxiliary port aux_mhb. Based on the structure, the radio frequency LFEM device can realize 2CA MIMO receiving processing of any frequency band of the first target signal, the second target signal, the third target signal and the fourth target signal, thereby further enriching the signal receiving function of the radio frequency LFEM device. Taking 2CA MIMO receiving processing of the first target signal and the fourth target signal as an example, the first amplifying unit 121 receives the fourth target signal from the first selecting module 110 via the second radio frequency switch 1232 and performs receiving processing, the second amplifying unit 122 receives the first target signal from the first selecting module 110 via the third radio frequency switch 1233 and performs receiving processing, the third amplifying unit 131 receives the first target signal from the first auxiliary port aux_mhb via the fifth radio frequency switch 1332 and the fourth radio frequency switch 1331 and performs MIMO receiving processing, and the fourth amplifying unit 132 receives the fourth target signal from the first auxiliary port aux_mhb via the sixth radio frequency switch 1333 and performs MIMO receiving processing.

With continued reference to fig. 4, in one embodiment, the first selection module 110 further includes a third filter 115. The third filter 115 is connected to the other first end of the first antenna switch 111 and the other second end of the sixth radio frequency switch 1333, and the third filter 115 is configured to transmit a fifth target signal of the received mid-high frequency signals to the sixth radio frequency switch 1333, where the frequency bands of the fifth target signal and the first target signal, the second target signal, and the third target signal are different. Illustratively, the fifth target signal may be a radio frequency signal in the B40 band. Based on the structure of the present embodiment, the radio frequency LFEM device can realize 4CA reception processing of the first target signal, the second target signal, the third target signal, and the fifth target signal. It will be appreciated that the fourth target signal may be a radio frequency signal in the B40 band, and the fifth target signal may be a radio frequency signal in the B41 band.

Further, the sixth rf switch 1333 may have a second terminal connected to the first auxiliary port aux_mhb and receive the fifth target signal from the first auxiliary port aux_mhb. Based on the structure, the radio frequency LFEM device can realize 2CA MIMO receiving processing of any frequency band of the first target signal, the second target signal, the third target signal and the fifth target signal, thereby further enriching the signal receiving function of the radio frequency LFEM device. Taking 2CA MIMO receiving processing of the first target signal and the fifth target signal as an example, the first amplifying unit 121 receives the fifth target signal from the first auxiliary port aux_mhb via the second radio frequency switch 1232 and performs MIMO receiving processing, the second amplifying unit 122 receives the first target signal from the first selecting module 110 via the third radio frequency switch 1233 and performs receiving processing, the third amplifying unit 131 receives the first target signal from the first auxiliary port aux_mhb via the fifth radio frequency switch 1332 and the fourth radio frequency switch 1331 and performs MIMO receiving processing, and the fourth amplifying unit 132 receives the fifth target signal from the first selecting module 110 via the sixth radio frequency switch 1333 and performs MIMO receiving processing.

Fig. 5 is a schematic diagram of a radio frequency LFEM device according to an embodiment, referring to fig. 5, in one embodiment, the first selecting module 110 may further include filters in the frequency bands of b25+70, B34, B39, and the like, and correspondingly, the first switching unit 123 and the second switching unit 133 are respectively connected to the filters. Based on the structure, 4CA receiving processing of more multi-band combination modes, such as B7+B34+B39+B40 and the like, can be realized, so that the signal receiving function of the radio frequency LFEM device is further enriched. It should be understood that the above-mentioned combination of the bands CA is only used for illustration, and is not used to limit the protection scope of the present embodiment.

Fig. 6 is a schematic structural diagram of a radio frequency LFEM device according to an embodiment, referring to fig. 6, in one embodiment, the radio frequency LFEM device 10 is further configured with a second antenna port, and the radio frequency LFEM device 10 further includes a third receiving module 140 and a second selecting module 150.

The first end of the second selecting module 150 is connected to the third receiving module 140, the second end of the second selecting module 150 is connected to the second antenna ANT2 port, and the second selecting module 150 is configured to receive the low-frequency signal from the second antenna port and select to transmit a sixth target signal in the low-frequency signal to the third receiving module 140. The third receiving module 140 is configured to perform a receiving process on the sixth target signal from the second selecting module 150. Specifically, the low frequency signal may include a radio frequency signal of any one of the low frequency bands of the 4G LTE signal and the 5G NR signal, and may include radio frequency signals of a plurality of frequency bands of B8, B12, B20, B26, B28A, and the like, for example. In the example shown in fig. 6, the sixth target signal is exemplified as a signal in the B8 band. In this embodiment, by providing the third receiving module 140 and the second selecting module 150, the radio frequency LFEM device can support the reception of low, medium and high frequency radio frequency signals at the same time, that is, the receiving function of the carrier aggregation signal formed by the low frequency signal and the medium and high frequency signal is realized, so that the signal receiving function of the radio frequency LFEM device is further enriched. In addition, the first receiving module 120 and the second receiving module 130 may be connected to the output ports of the radio frequency LFEM device 10 through MUX switches, so as to realize selective conduction of the output ports of the signals in different frequency bands.

Fig. 7 is a schematic structural diagram of a radio frequency LFEM device according to an embodiment, referring to fig. 7, in one embodiment, the second selecting module 150 includes a radio frequency switch and a plurality of filters in low frequency bands, and accordingly, the third receiving module 140 includes a low noise amplifier and an SPnT switch, a first end of the SPnT switch is connected to the low noise amplifier, and a plurality of second ends of the SPnT switch are respectively connected to the filters in low frequency bands in a one-to-one correspondence manner, so as to further expand the number of supported low frequency bands. And a part of the second end of the SPnT switch can be connected with the auxiliary port AUX_LB, so that a filter of a low-frequency band which is hung externally is connected, and flexible expansion of a receiving frequency band is realized.

Fig. 8 is one of the schematic structural diagrams of the rf system according to an embodiment, referring to fig. 8, in one embodiment, the rf system includes the rf LFEM device 10 and the rf DiFEM device 20 as described above. In the embodiment shown in fig. 8, an example is illustrated that includes the radio frequency LFEM device 10 shown in fig. 7.

Wherein a first antenna port of the radio frequency LFEM device 10 is used for connecting to a first antenna ANT1. When the radio frequency LFEM device 10 includes a second antenna port, the second antenna port is used to connect to the third antenna ANT3. In addition, the output ports of the radio frequency LFEM devices 10 are all connected to an external radio frequency transceiver 30, so that demodulation of the received signal is achieved through the radio frequency transceiver 30. The radio frequency DiFEM device 20 is configured with at least three transmission ports and a third antenna port for connecting with a second antenna ANT2, the three transmission ports are respectively connected with the three first auxiliary ports AUX_MHB of the radio frequency LFEM device 10 in a one-to-one correspondence manner, and the radio frequency DiFEM device 20 is used for receiving the medium-high frequency MIMO signals from the third antenna port and respectively transmitting the first target signal, the second target signal and the third target signal in the medium-high frequency MIMO signals to the three transmission ports in a one-to-one correspondence manner. Alternatively, the antenna may be formed using any suitable type of antenna, for example, an antenna with a resonating element formed from the following antenna structure may be included: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, and a dipole antenna. Wherein different types of antennas may be used for different frequency bands and combinations of frequency bands.

Taking the first target signal as the B1 frequency band signal and the second target signal as the B3 frequency band signal as an example, the working principle is explained. The middle-high frequency signal is transmitted to the first receiving module 120 through the first antenna ANT1 and the first antenna port, the first combiner 112 transmits the B1 signal to the second amplifying unit 122 through the first radio frequency switch 1231 and the third radio frequency switch 1233 for amplifying, and the first filter 113 transmits the B7 signal to the first amplifying unit 121 through the second radio frequency switch 1232 for amplifying. The other path of medium-high frequency signal is transmitted to the radio frequency DiFEM device 20 through the second antenna and the third antenna port, the radio frequency DiFEM device 20 transmits the B1 signal to the second amplifying unit 122 through the first auxiliary port AUX_MHB, the fourth radio frequency switch 1331 and the fifth radio frequency switch 1332 for MIMO amplifying, and transmits the B7 signal to the fourth amplifying unit 132 through the first auxiliary port AUX_MHB and the sixth radio frequency switch 1333 for MIMO amplifying. Based on the above structure, the radio frequency system of the embodiment can realize 3CA receiving processing of target signals of three frequency bands, and can select 2CA MIMO receiving processing of target signals of any two frequency bands. And the volume of the radio frequency system is smaller, so that the area of materials can be reduced, and the miniaturization of products can be realized.

With continued reference to fig. 8, in one embodiment, the radio frequency system further includes an external low frequency band filter. It can be understood that, in the case of a larger space utilization rate of the rf LFEM device, if a newly added filter with a low frequency band is forcibly integrated into the rf LFEM device, the volume of the rf LFEM device may be increased. Therefore, the embodiment can further improve the element distribution condition in the radio frequency LFEM device by reasonably selecting to externally arrange part of the filters in the low frequency band, so that the element distribution in the radio frequency LFEM device is reasonable.

Fig. 9 is a second view of the structure of the rf system according to an embodiment, referring to fig. 9, in one embodiment, the rf DiFEM device 20 includes a second antenna switch 210, a third combiner 220, and a fourth filter 230.

The second antenna switch 210 includes a plurality of first ends and a second end, the second end of the second antenna switch 210 is connected to the third antenna port, and the second antenna switch 210 is configured to selectively conduct signal transmission paths between at most two first ends and the second end so as to transmit the received mid-high frequency MIMO signal to the conducted first end. The two first ends of the third combiner 220 are respectively connected to the two transmission ports in a one-to-one correspondence manner, the second end of the third combiner 220 is connected to one first end of the second antenna switch 210, and the third combiner 220 is configured to transmit a first target signal in the received mid-high frequency MIMO signal to one of the transmission ports and transmit a third target signal in the received mid-high frequency MIMO signal to the other transmission port. A fourth filter 230 is connected to the other first end of the second antenna switch 210 and the other transmission port, and the fourth filter 230 is configured to transmit a second target signal in the received mid-high frequency MIMO signal to the connected transmission port. It will be appreciated that the insertion loss of both the combiner and the filter is lower than that of the triplexer. Therefore, the combination structure of the third combiner 220 and the fourth filter 230 is adopted in the present embodiment on the premise of space allowance in the rf DiFEM device 20, so that the loss on the path can be effectively reduced, and the receiving performance of the mid-high frequency signal from the third antenna port can be improved. It can be appreciated that the operation principle of the receiving and MIMO receiving in this embodiment is similar to that in the embodiment of fig. 8, and will not be described here again.

Fig. 10 is a third schematic structural diagram of an rf system according to an embodiment, referring to fig. 10, in one embodiment, the rf DiFEM device 20 further includes at least one of a fifth filter 240 and a sixth filter 250.

The fifth filter 240 is connected to a first end of the second antenna switch 210 and one of the transmission ports, and the fifth filter 240 is configured to transmit a fourth target signal of the received mid-high frequency MIMO signals to the connected transmission port. And a sixth filter 250 connected to the other first end of the second antenna switch 210 and the other transmission port, respectively, where the sixth filter 250 is configured to transmit a fifth target signal in the received mid-high frequency MIMO signal to the connected transmission port. Wherein the transmission port connected to the fifth filter 240 is connected to the second receiving module 130 through the corresponding first auxiliary port aux_mhb, the transmission port connected to the sixth filter 250 is connected to the first receiving module 120 through the corresponding first auxiliary port aux_mhb, and frequency bands of the first target signal, the second target signal, the third target signal, the fourth target signal, and the fifth target signal are different from each other.

In this embodiment, by setting the fifth filter 240, the radio frequency system may implement 2CA MIMO receiving processing for any frequency band of the first target signal, the second target signal, the third target signal, and the fourth target signal. Taking the first target signal as a B1 frequency band signal and the fourth target signal as a B41 frequency band signal as an example, the working principle of the method is explained. The middle-high frequency signal is transmitted to the first receiving module 120 through the first antenna ANT1 and the first antenna port, the first combiner 112 transmits the B1 signal to the second amplifying unit 122 through the first radio frequency switch 1231 and the third radio frequency switch 1233 for amplifying, and the fifth filter 240 transmits the B41 signal to the first amplifying unit 121 through the second radio frequency switch 1232 for amplifying. The other path of medium-high frequency signal is transmitted to the radio frequency DiFEM device 20 through the second antenna and the third antenna port, the radio frequency DiFEM device 20 transmits the B1 signal to the second amplifying unit 122 through the first auxiliary port AUX_MHB, the fourth radio frequency switch 1331 and the fifth radio frequency switch 1332 for MIMO amplifying, and transmits the B41 signal to the fourth amplifying unit 132 through the first auxiliary port AUX_MHB and the sixth radio frequency switch 1333 for MIMO amplifying. Similarly, by setting the sixth filter 250, the radio frequency system can implement 2CA MIMO receiving processing for any frequency band of the first target signal, the second target signal, the third target signal, and the fifth target signal. Further, if the second filter 114, the third filter 115, the fifth filter 240, and the sixth filter 250 are provided at the same time, the radio frequency system can also realize 2CA MIMO reception processing for the fourth target signal and the fifth target signal.

Fig. 11 is a schematic structural diagram of an rf system according to an embodiment, referring to fig. 11, in one embodiment, the rf dipem device 20 is further configured with a second auxiliary port AUX2, the rf dipem device 20 is further configured to selectively transmit the mid-high frequency MIMO signal to the second auxiliary port AUX2, and the rf system further includes a seventh rf switch 410, an eighth rf switch 420, and a second combiner 430.

The first end of the seventh rf switch 410 is connected to the first auxiliary port aux_mhb of the rf LFEM device 10 for transmitting the third target signal, and the second end of the seventh rf switch 410 is connected to the transmission port of the rf DiFEM device 20 for transmitting the third target signal in a one-to-one correspondence. A first end of the eighth rf switch 420 is connected to the first auxiliary port aux_mhb of the rf LFEM device 10 for transmitting the first target signal, and a second end of the eighth rf switch 420 is connected to the transmission port of the rf DiFEM device 20 for transmitting the first target signal in a one-to-one correspondence. The two first ends of the second combiner 430 are respectively connected to the other second end of the seventh rf switch 410 and the other second end of the eighth rf switch 420 in a one-to-one correspondence manner, the second end of the second combiner 430 is connected to the second auxiliary port AUX2, and the second combiner 430 is configured to transmit a seventh target signal of the mid-high frequency MIMO signal to the seventh rf switch 410 and transmit an eighth target signal of the mid-high frequency MIMO signal to the eighth rf switch 420, where the frequency bands of the seventh target signal, the eighth target signal, the first target signal, the second target signal, and the third target signal are different from each other.

Illustratively, the seventh target signal is a signal in the B66 frequency band, and the eighth target signal is a signal in the B25 frequency band, which illustrates the working principle thereof. The middle-high frequency signal is transmitted to the first receiving module 120 through the first antenna ANT1 and the first antenna port, the first combiner 112 transmits the B66 signal to the second amplifying unit 122 through the first radio frequency switch 1231 and the third radio frequency switch 1233 for amplifying, and the B25 band filter in the first receiving module 120 transmits the B25 signal to the third amplifying unit 131 through the fifth radio frequency switch 1332 for amplifying. The other path of medium-high frequency signal is transmitted to the radio frequency DiFEM device 20 through the second antenna and the third antenna port, the second combiner 430 transmits the B66 signal to the fourth amplifying unit 132 through the seventh radio frequency switch 410, the first auxiliary port AUX_MHB, the fourth radio frequency switch 1331 and the fifth radio frequency switch 1332 for MIMO amplifying, and transmits the B25 signal to the first amplifying unit 121 through the eighth radio frequency switch 420, the first auxiliary port AUX_MHB and the sixth radio frequency switch 1333 for MIMO amplifying. In this embodiment, by providing the second combiner 430, the radio frequency may implement 2CA MIMO receiving processing for the seventh target signal and the eighth target signal, and may also implement 2CA MIMO receiving processing for one of the seventh target signal and the eighth target signal and other frequency band signals. Moreover, since the external second combiner 430 is adopted, only the ASM switch inside the radio frequency DiFEM device 20 is required to be connected with the AUX2 port, thereby reducing the insertion loss and improving the receiving sensitivity of the radio frequency system.

Fig. 12 is a schematic diagram of a radio frequency system according to an embodiment, referring to fig. 12, in one embodiment, the radio frequency DiFEM device 20 is further configured with a second auxiliary port AUX2, the radio frequency DiFEM device 20 is further configured to selectively transmit the medium-high frequency MIMO signal to the second auxiliary port AUX2, and the radio frequency system further includes a seventh radio frequency switch 410 and a seventh filter 440.

Wherein a first end of the seventh rf switch 410 is connected to the first auxiliary port aux_mhb of the rf LFEM device 10 for transmitting the third target signal, and a second end of the seventh rf switch 410 is connected to the transmission port of the rf DiFEM device 20 for transmitting the third target signal. The seventh filter 440 is connected to the second auxiliary port AUX2 and another second end of the seventh radio frequency switch 410, and the seventh filter 440 is configured to transmit a seventh target signal of the mid-high frequency MIMO signal to the seventh radio frequency switch 410, where the frequency bands of the seventh target signal and the first target signal, the second target signal, and the third target signal are different. It can be understood that the operation principle of the receiving and MIMO receiving in this embodiment is similar to that in the embodiment of fig. 11, and will not be described here again. Compared to the embodiment of fig. 11, in this embodiment, by only externally arranging one seventh filter 440, the corresponding eighth rf switch 420 is not needed, so that the number of additional components needed in the rf system is reduced, and the volume of the rf system is further reduced.

The embodiment of the application also provides communication equipment comprising the radio frequency system. Based on the foregoing radio frequency system, the communication device of this embodiment may receive 3CA of target signals of three frequency bands, and may receive 2CA MIMO of target signals of any two frequency bands. And because of the small volume of the radio frequency system, a miniaturized communication device can be realized.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few implementations of the present examples, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made to the present application without departing from the spirit of the embodiments of the application. Accordingly, the protection scope of the patent of the embodiments of the application shall be subject to the appended claims.

Claims

1. A radio frequency LFEM device configured with a first antenna port and at least three first auxiliary ports, the radio frequency LFEM device comprising a first selection module, a first receiving module and a second receiving module;

The second receiving module is further connected to the other two first auxiliary ports, and is configured to perform receiving processing on the third target signal from the first selecting module, perform receiving processing on the first target signal from one of the first auxiliary ports, and perform receiving processing on the second target signal from the other one of the first auxiliary ports;

wherein the first selection module includes:

a first antenna switch, including a plurality of first terminals and a second terminal, the second terminal of the first antenna switch being connected to the first antenna port, the first antenna switch being configured to selectively turn on a signal transmission path between at most two first terminals and the second terminal, so as to transmit the received medium-high frequency signal to the turned-on first terminal;

the first combiner is used for transmitting a first target signal in the received medium-high frequency signals to the first receiving module and transmitting a third target signal in the received medium-high frequency signals to the second receiving module;

And the first filter is respectively connected with the other first end of the first antenna switch and the first receiving module and is used for transmitting a second target signal in the received medium-high frequency signal to the first receiving module.

2. The radio frequency LFEM device of claim 1, wherein the first receiving module comprises:

the first amplifying unit is used for amplifying the received second target signal and the received third target signal;

the second amplifying unit is used for amplifying the received first target signal and the received third target signal;

the first switch unit comprises two first ends and at least three second ends, wherein the two first ends of the first switch unit are respectively connected with the first amplifying unit and the second amplifying unit in one-to-one correspondence, and the three second ends of the first switch unit are respectively connected with the first auxiliary port for transmitting the third target signal, the first end for transmitting the first target signal by the first combiner and the first filter in one-to-one correspondence.

3. The radio frequency LFEM device of claim 2, wherein the first switching unit comprises:

A first radio frequency switch, wherein a second end of the first radio frequency switch is connected with the first auxiliary port for transmitting the third target signal;

the first end of the second radio frequency switch is connected with the first amplifying unit, and the two second ends of the second radio frequency switch are respectively connected with the first end of the second target signal output by the first selection module and one first end of the first radio frequency switch in a one-to-one correspondence manner;

the first end of the third radio frequency switch is connected with the second amplifying unit, and the two second ends of the third radio frequency switch are respectively connected with the first end of the first target signal output by the first selection module and the other first end of the first radio frequency switch in a one-to-one correspondence mode.

4. The radio frequency LFEM device of claim 3, wherein the first selection module further comprises:

the second filter is respectively connected with one first end of the first antenna switch and the other second end of the second radio frequency switch, and is used for transmitting a fourth target signal in the received medium-high frequency signals to the second radio frequency switch, and the frequency bands of the fourth target signal, the first target signal, the second target signal and the third target signal are different.

5. The radio frequency LFEM device of claim 1, wherein the second receiving module comprises:

a third amplifying unit, configured to amplify the received first target signal and the third target signal;

a fourth amplifying unit, configured to amplify the received second target signal and the third target signal;

the second switch unit comprises two first ends and at least three second ends, the two first ends of the second switch unit are respectively connected with the third amplifying unit and the fourth amplifying unit in one-to-one correspondence, one second end of the second switch unit is connected with the first end of the first combiner for transmitting the third target signal, and the other two second ends of the second switch unit are respectively connected with the two first auxiliary ports for transmitting the first target signal and the second target signal in one-to-one correspondence.

6. The radio frequency LFEM device of claim 5, wherein the second switching unit comprises:

a second end of the fourth radio frequency switch is connected with the first auxiliary port for transmitting the first target signal;

The first end of the fifth radio frequency switch is connected with the third amplifying unit, and the two second ends of the fifth radio frequency switch are respectively connected with the first end of the first selecting module for outputting the third target signal and one first end of the fourth radio frequency switch in a one-to-one correspondence manner;

and the first end of the sixth radio frequency switch is connected with the fourth amplifying unit, and the two second ends of the sixth radio frequency switch are respectively connected with the other first end of the fourth radio frequency switch and the first auxiliary port for transmitting the second target signal in a one-to-one correspondence manner.

7. The radio frequency LFEM device of claim 6, wherein the first selection module further comprises:

the third filter is respectively connected with the other first end of the first antenna switch and the other second end of the sixth radio frequency switch, and is used for transmitting a fifth target signal in the received medium-high frequency signals to the sixth radio frequency switch, and the frequency bands of the fifth target signal, the first target signal, the second target signal and the third target signal are different.

8. The radio frequency LFEM device according to any one of claims 1 to 7, further configured with a second antenna port, the radio frequency LFEM device further comprising a third receiving module and a second selecting module;

the first end of the second selection module is connected with the third receiving module, the second end of the second selection module is connected with the second antenna port, and the second selection module is used for receiving the low-frequency signals from the second antenna port and selecting to transmit a sixth target signal in the low-frequency signals to the third receiving module;

the third receiving module is configured to perform receiving processing on the sixth target signal from the second selecting module.

9. A radio frequency system, comprising:

the radio frequency LFEM device according to any one of claims 1 to 8, wherein a first antenna port of said radio frequency LFEM device is adapted to be connected to a first antenna;

10. The radio frequency system of claim 9, wherein the radio frequency DiFEM device comprises:

a second antenna switch, including a plurality of first ends and a second end, the second end of the second antenna switch is connected with the third antenna port, the second antenna switch is used for selecting and conducting the signal transmission path between at most two first ends and the second end so as to transmit the received medium-high frequency MIMO signal to the conducted first end;

the second end of the third combiner is connected with one first end of the second antenna switch, and the third combiner is used for transmitting a first target signal in the received medium-high frequency MIMO signal to one transmission port and transmitting a third target signal in the received medium-high frequency MIMO signal to the other transmission port;

and the fourth filter is respectively connected with the other first end and the other transmission port of the second antenna switch and is used for transmitting a second target signal in the received medium-high frequency MIMO signal to the connected transmission port.

11. The radio frequency system of claim 10, wherein the radio frequency DiFEM device further comprises:

a fifth filter connected to a first end of the second antenna switch and the transmission port, respectively, the fifth filter being configured to transmit a fourth target signal in the received mid-high frequency MIMO signal to the connected transmission port; and/or

A sixth filter connected to the other first end of the second antenna switch and the other transmission port, respectively, the sixth filter being configured to transmit a fifth target signal in the received mid-high frequency MIMO signal to the connected transmission port;

the transmission port connected with the fifth filter is connected to the second receiving module through the corresponding first auxiliary port, the transmission port connected with the sixth filter is connected to the first receiving module through the corresponding first auxiliary port, and frequency bands of the first target signal, the second target signal, the third target signal, the fourth target signal and the fifth target signal are different from each other.

12. The radio frequency system according to claim 9, wherein the radio frequency DiFEM device is further configured with a second auxiliary port, the radio frequency DiFEM device further configured to selectively transmit the medium-high frequency MIMO signal to the second auxiliary port, the radio frequency system further comprising:

A seventh rf switch, a first end of which is connected to the first auxiliary port of the rf LFEM device for transmitting the third target signal, and a second end of which is connected to the transmission port of the rf DiFEM device for transmitting the third target signal in a one-to-one correspondence;

an eighth radio frequency switch, wherein a first end of the eighth radio frequency switch is connected with the first auxiliary port of the radio frequency LFEM device for transmitting the first target signal, and a second end of the eighth radio frequency switch is connected with the transmission port of the radio frequency DiFEM device for transmitting the first target signal in a one-to-one correspondence manner;

the second combiner is connected with the other second end of the seventh radio frequency switch and the other second end of the eighth radio frequency switch in a one-to-one correspondence mode, the second end of the second combiner is connected with the second auxiliary port, and the second combiner is used for transmitting a seventh target signal in the medium-high frequency MIMO signal to the seventh radio frequency switch and transmitting an eighth target signal in the medium-high frequency MIMO signal to the eighth radio frequency switch, and the frequency bands of the seventh target signal, the eighth target signal, the first target signal, the second target signal and the third target signal are different from each other.

13. The radio frequency system according to claim 9, wherein the radio frequency DiFEM device is further configured with a second auxiliary port, the radio frequency DiFEM device further configured to selectively transmit the medium-high frequency MIMO signal to the second auxiliary port, the radio frequency system further comprising:

a seventh rf switch, a first end of the seventh rf switch is connected to the first auxiliary port of the rf LFEM device for transmitting the third target signal, and a second end of the seventh rf switch is connected to the transmission port of the rf DiFEM device for transmitting the third target signal;

and the seventh filter is respectively connected with the second auxiliary port and the other second end of the seventh radio frequency switch, and is used for transmitting a seventh target signal in the medium-high frequency MIMO signal to the seventh radio frequency switch, wherein the frequency bands of the seventh target signal and the first target signal are different from each other, and the frequency bands of the second target signal and the third target signal are different from each other.

14. A communication device comprising a radio frequency system as claimed in any one of claims 9 to 13.