CN218679066U - Radio frequency system and communication equipment - Google Patents

Abstract

The application relates to a radio frequency system and communication equipment, which can support double-path transmission and 4 x 4MIMO receiving functions of low-frequency signals through a radio frequency transceiver, a transceiver module and a receiving module of a first transceiver circuit, a second transceiver circuit, the first receiving circuit and the second receiving circuit. Compared with a radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, the downlink receiving rate of the low-frequency signal of the radio frequency system of the embodiment can be doubled, and the downlink coverage distance is doubled; compared with the traditional one-path transmission uplink rate, the uplink coverage distance is doubled; therefore, the channel capacity, the transmitting performance and the receiving performance of the radio frequency system can be improved in multiples.

Description

Radio frequency system and communication equipment

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a radio frequency system and a communication device.

Background

With the development and progress of the technology, the 5G mobile communication technology is gradually beginning to be applied to electronic devices. The communication frequency of the 5G mobile communication technology is higher than that of the 4G mobile communication technology. The conventional radio frequency system has poor receiving performance and transmitting performance for 5G low-frequency signals (e.g., N28 frequency band signals) in poor signal areas such as cell edges, building depths or elevators.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a radio frequency system and a communication device, which can improve the channel capacity, the transmitting performance and the receiving performance of the radio frequency system to low-frequency signals.

A first aspect of the present application provides a radio frequency system, comprising: the radio frequency transceiver comprises a radio frequency transceiver, and a first transceiving circuit, a second transceiving circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver; the first transceiver circuit and the second transceiver circuit are respectively used for supporting the transmission and receiving processing of low-frequency signals; the first receiving circuit and the second receiving circuit are respectively used for supporting the receiving processing of the low-frequency signal; the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit are respectively connected to different antennas;

wherein the first transceiving circuit comprises:

the receiving and transmitting module is used for carrying out power amplification and filtering processing on the low-frequency signal output by the radio frequency receiving and transmitting device and outputting the low-frequency signal to the antenna and carrying out filtering processing on the low-frequency signal from the antenna;

and the receiving module is connected with the transceiving module and used for receiving the low-frequency signal filtered by the transceiving module and amplifying the low-frequency signal.

A second aspect of the present application provides a communication device, comprising:

a radio frequency system as described above.

The radio frequency system and the communication equipment can support the two-way transmission and 4 x 4MIMO receiving functions of low-frequency signals through the radio frequency transceiver, the transceiver module and the receiving module of the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit. Compared with a radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, the downlink receiving rate of the low-frequency signal of the radio frequency system of the embodiment can be doubled, and the downlink coverage distance is doubled; compared with the traditional one-path transmission uplink rate, the uplink coverage distance is doubled; therefore, the channel capacity, the transmitting performance and the receiving performance of the radio frequency system can be improved in multiples.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a block diagram of an embodiment of a radio frequency system;

FIG. 2 is a second block diagram of the RF system according to an embodiment;

FIG. 3 is a third block diagram of an exemplary RF system;

FIG. 4 is a block diagram of an embodiment of a RF system;

FIG. 5 is a block diagram of an embodiment of a radio frequency system;

FIG. 6 is a sixth block diagram illustrating an exemplary RF system;

FIG. 7 is a seventh block diagram illustrating the structure of the RF system according to an embodiment;

FIG. 8 is an eighth block diagram illustrating the architecture of an exemplary RF system;

FIG. 9 is a ninth block diagram illustrating an exemplary RF system;

FIG. 10 is a block diagram showing the structure of an RF system according to an embodiment;

FIG. 11 is an eleventh block diagram illustrating an exemplary RF system;

FIG. 12 is a twelfth block diagram illustrating an exemplary RF system;

FIG. 13 is a thirteen block diagram of the RF system according to an embodiment;

FIG. 14 is a block diagram of a fourteen-configuration RF system in accordance with one embodiment;

FIG. 15 is a block diagram of an exemplary RF system;

fig. 16 is a block diagram of a communication device in an embodiment.

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.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another element, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The radio frequency system according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing devices connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device.

The radio frequency system according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a smart car, 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 the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device.

Fig. 1 is a block diagram of a radio frequency system according to an embodiment, and referring to fig. 1, in the embodiment, the radio frequency system includes a radio frequency transceiver 10, and a first transceiver circuit 20, a second transceiver circuit 30, a first receiver circuit 40, and a second receiver circuit 50 respectively connected to the radio frequency transceiver 10.

The first transceiver circuit 20 and the second transceiver circuit 30 are respectively used for supporting transmission and reception processing of low-frequency signals; a first receiving circuit 40 and a second receiving circuit 50, which are respectively used for supporting the receiving processing of the low-frequency signal; the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50 are connected to different antennas, respectively (fig. 1 shows an example in which the first transceiver circuit 20 is connected to the first antenna ANT1, the first receiver circuit 40 is connected to the second antenna ANT2, the second transceiver circuit 30 is connected to the third antenna ANT3, and the second receiver circuit 50 is connected to the fourth antenna ANT 4).

The radio frequency transceiver 10 is respectively connected to the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40 and the second receiving circuit 50, and is configured to output low frequency signals to the first transceiver circuit 20 and the second transceiver circuit 30, so as to perform transmission processing through the first transceiver circuit 20 and the second transceiver circuit 30; and is also used for receiving the low-frequency signals received by the first receiving circuit 40 and the second receiving circuit 50, respectively.

The first transceiver circuit 20 includes: a transceiver module 201, configured to perform power amplification and filtering processing on a low-frequency signal output by the radio frequency transceiver 10, output the low-frequency signal to an antenna, and perform filtering processing on a low-frequency signal from the antenna; the receiving module 202 is connected to the transceiver module 201, and is configured to receive the low-frequency signal filtered by the transceiver module 201, and amplify the low-frequency signal. Specifically, the receiving module 202 is connected to an antenna through the transceiving module 201, the transceiving module 201 and the second transceiving circuit 30 each include a transmitting path and a receiving path, the transmitting path and the receiving path are configured to be connected to the same antenna, the transmitting path of the transceiving module 201 is used for performing power amplification processing and filtering processing on the low-frequency signal output by the radio frequency transceiver 10 and outputting the low-frequency signal, and the receiving path of the transceiving module 201 is used for performing filtering processing on the received low-frequency signal and outputting the low-frequency signal to the receiving module 202; the transmitting path of the second transceiving circuit 30 is used to perform power amplification and filtering processing on the low frequency signal output by the radio frequency transceiver 10 and then output the low frequency signal, and the receiving path of the second transceiving circuit 30 is used to perform filtering processing and low noise amplification processing on the received low frequency signal and then output the low frequency signal to the radio frequency transceiver 10. The receiving module 202, the first receiving circuit 40, and the second receiving circuit 50 each include a receiving path to perform low-noise amplification processing on the received low-frequency signal. The receiving module 202, the first receiving circuit 40, and the second receiving circuit 50 are independent of each other, do not interfere with each other, and have high isolation.

The transceiver module 201 and the receiving module 202 are connected to the same antenna, the transceiver module 201, the second transceiver circuit 30, the first receiving circuit 40, and the second receiving circuit 50 are respectively connected to different antennas, each of the antennas can support transceiving of a low-frequency signal, and optionally, the low-frequency signal may be one of a 4G LTE low-frequency signal and a 5G NR low-frequency signal. Illustratively, the low-frequency signal includes a radio-frequency signal in any one of N5, N8, N20, N28, B8, B26, B28, and so on.

Therefore, the radio frequency system provided in this embodiment can support two-way transmission of low frequency signals and 4 x 4mimo receiving function through the radio frequency transceiver 10, the transceiver module 201 and the receiving module 202 of the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40, and the second receiving circuit 50. Compared with a radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, the downlink receiving rate of the low-frequency signal of the radio frequency system of the embodiment can be doubled, and the downlink coverage distance is doubled; compared with the traditional one-path transmission uplink rate, the uplink coverage distance is doubled; therefore, the channel capacity, the transmitting performance and the receiving performance of the radio frequency system can be improved in multiples.

In some embodiments, the transceiver module 201 and the target switching circuit are configured to be switchably connected to at least two antennas (it is understood that, here, the at least two antennas may be at least two of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT 4), and the target switching circuit includes at least one of the second transceiver circuit 30, the first receiving circuit 40 and the second receiving circuit 50.

When the transceiver module 201 and the target switching circuit are switchably connected to at least two antennas, the rf system may select one of the at least two antennas with higher efficiency to connect with the transceiver module 201, so as to improve the transceiving processing efficiency of the first transceiver circuit 20. Optionally, the first transceiver circuit 20 is configured to support transmission and dominant set reception of low-frequency signals, and by selecting an antenna with higher antenna efficiency to support transmission and dominant set reception, the transceiving efficiency of transmission and dominant set reception of the radio frequency system can be improved, and the communication performance of the radio frequency system can be improved. It is to be understood that, in this embodiment, the dominant set reception itself is also MIMO reception.

For example, when the target switching circuit is the first receiving circuit 40, the transceiver module 201 and the first receiving circuit 40 may be switchably connected to the first antenna ANT1 and the second antenna ANT2, and both the first antenna ANT1 and the second antenna ANT2 may support a transmitting and a main set receiving function, and at this time, the second transceiver circuit 30 and the second receiving circuit 50 may be fixedly connected to the third antenna ANT3 and the fourth antenna ANT4 in a one-to-one correspondence. Optionally, the first antenna ANT1 may be used as a default target antenna of the transceiver module 201, and if a difference between a second signal strength of the low-frequency signal received by the second antenna ANT2 and a first signal strength of the low-frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold in a preset time period, the second antenna ANT2 is configured as the target antenna of the transceiver module 201.

For example, when the target switching circuit includes the first receiving circuit 40 and the second receiving circuit 50, the transceiver module 201 and the first and second receiving circuits 40 and 50 may be switchably connected to the first antenna ANT1, the second antenna ANT2, and the fourth antenna ANT4, and the first antenna ANT1, the second antenna ANT2, and the fourth antenna ANT4 may support both transmitting and dominant set receiving functions, and at this time, the second receiving/transmitting circuit 40 may be fixedly connected to the third antenna ANT3. Optionally, the first antenna ANT1 may be used as a default target antenna of the transceiver module 201, and if any one of a difference between a second signal strength of the low-frequency signal received by the second antenna ANT2 and a first signal strength of the low-frequency signal received by the first antenna ANT1 or a difference between a fourth signal strength of the low-frequency signal received by the fourth antenna ANT4 and the first signal strength of the low-frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold within a preset time period, the second antenna ANT2 or the fourth antenna ANT4 is correspondingly configured as the target antenna of the transceiver module 201.

Optionally, the radio frequency transceiver 10 may determine a target antenna connected to the transceiver module 201 from the at least two antennas, and control related devices to conduct the radio frequency path between the target antenna and the transceiver module 201, and conduct the connection between other antennas and the target switching circuit, so as to implement the connection between the target antenna and the transceiver module 201, and improve the communication performance of the radio frequency system. Alternatively, the radio frequency transceiver 10 may configure the target antenna connected to the transceiving module 201 according to network information of the low frequency Signal Received by each of the at least two antennas, where the network information may include raw and processed information associated with radio performance metrics of the Received low frequency Signal, such as Signal Strength, received Power, reference Signal Received Power (RSRP), received Signal Strength (Received Signal Strength Indicator, RSSI), signal to Noise Ratio (SNR), rank of MIMO channel matrix (Rank), carrier to Interference and Noise Ratio (RS-CINR), frame error rate, bit error rate, reference Signal Received Quality (RSRQ), and the like.

In some embodiments, the rf system may perform the switching of the antenna through a switching circuit disposed outside the transceiver module 201, and referring to fig. 2, the rf system further includes: a first switching circuit 60.

The first switching circuit 60 has a plurality of first ends of the first switching circuit 60 respectively connected to the transceiver module 201 and the target switching circuit in a one-to-one correspondence manner, a plurality of second ends of the first switching circuit 60 respectively connected to the at least two antennas in a one-to-one correspondence manner, and the first switching circuit 60 is configured to switchably connect the transceiver module 201 and the target switching circuit to the at least two antennas.

For example, when the target switching circuit is the first receiving circuit 40, the first switching circuit 60 may be configured with two first terminals and two second terminals, the two first terminals of the first switching circuit 60 are respectively connected to the transceiver module 201 and the first receiving circuit 40, and the two second terminals of the first switching circuit 60 may be respectively connected to the first antenna ANT1 and the second antenna ANT2 (fig. 2 illustrates this embodiment), so that the transceiver module 201 and the first receiving circuit 40 are switchably connected to the first antenna ANT1 and the second antenna ANT2 through the first switching circuit 60. Alternatively, when the target switching circuit is the first receiving circuit 40, the first switching circuit 60 may be a double pole double throw switch.

For example, when the target switching circuit includes the first receiving circuit 40 and the second receiving circuit 50, the first switching circuit 60 is configured with three first terminals and three second terminals, the three first terminals are respectively connected to the transceiving module 201, the first receiving circuit 40 and the second receiving circuit 50, the three second terminals are respectively connected to the first antenna ANT1, the second antenna ANT2 and the fourth antenna ANT4, and the first switching circuit 60 is configured to switchably connect the transceiving module 201, the first receiving circuit 40 and the second receiving circuit 50 to the first antenna ANT1, the second antenna ANT2 and the fourth antenna ANT4. Alternatively, when the target switching circuit includes the first receiving circuit 40 and the second receiving circuit 50, the first switching circuit 60 may be a three-pole three-throw switch. Other embodiments are not intended to be exemplary.

It is understood that, in other embodiments, the rf system may also perform antenna switching through a switching unit disposed inside the transceiver module 201, and related embodiments are described below, and are not limited herein.

In some embodiments, referring to fig. 3, in case the target switching circuit is one of the receiving circuits, for example, the first receiving circuit 40, the transceiving module 201 and the first receiving circuit 40 are configured to be switchably connected to the first antenna ANT1 and the second antenna ANT2; the radio frequency system further comprises: a second switching circuit 70.

Two first ends of the second switching circuit 70 are connected to the second transceiver circuit 30 and the second receiver circuit 50 in a one-to-one correspondence, two second ends of the second switching circuit 70 are connected to the third antenna ANT3 and the fourth antenna ANT4 in a one-to-one correspondence, and the second switching circuit 70 is configured to switchably connect the second transceiver circuit 30 and the second receiver circuit 50 to the third antenna ANT3 and the fourth antenna ANT4.

When the first transceiver circuit 20 is configured to support transmission and dominant set reception, and the first receiver circuit 40 is configured to support diversity reception, the second transceiver circuit 30 may be configured to support dominant set MIMO reception, and the second receiver circuit 50 may be configured to support diversity MIMO reception, so that the second transceiver circuit 30 and the second receiver circuit 50 may be switchably connected to the third antenna ANT3 and the fourth antenna ANT4 through the second switching circuit 70, and an antenna with better antenna efficiency in the two antennas may be switched to be connected to the second transceiver circuit 30, thereby improving the transceiver efficiency of the second transceiver circuit 30 that is dominant set MIMO reception, and improving the communication performance of the radio frequency system. It is understood that in this embodiment, the main set reception and the diversity reception are also MIMO reception, and the main set reception and the main set MIMO reception are only different in name so as to distinguish the first transceiver circuit 20 and the second transceiver circuit 30 as two different paths in the MIMO reception supporting the main set; diversity reception and diversity MIMO reception are also only named differently in order to distinguish the first receiving circuit 40 and the second receiving circuit 50 as two different paths in MIMO reception supporting diversity.

Alternatively, the third antenna ANT3 may be used as a default target antenna of the second transceiver circuit 30, and if a difference between a fourth signal strength of the low-frequency signal received by the fourth antenna ANT4 and a third signal strength of the low-frequency signal received by the third antenna ANT3 is greater than or equal to a preset threshold within a preset time period, the fourth antenna ANT4 is configured as the target antenna of the second transceiver circuit 30. Alternatively, the second switching circuit 70 may be a double pole double throw switch.

In this embodiment, the rf system further includes the second switching circuit 70 on the basis of including the first switching circuit 60, so that the rf system can switch the antenna with better antenna efficiency of two antennas to be connected to the first transceiver circuit 20, and switch the antenna with better antenna efficiency of the other two antennas to be connected to the second transceiver circuit 30, thereby improving the transceiver efficiency of the first transceiver circuit 20 receiving as the main set and the transceiver efficiency of the second transceiver circuit 30 receiving as the main set MIMO, and further improving the communication performance of the rf system.

It is to be understood that, in other embodiments, the second receiving circuit 50 may also be a target switching circuit, and accordingly, two first terminals of the second switching circuit 70 may be connected to the second transceiver circuit 30 and the first receiving circuit 40 in a one-to-one correspondence manner, which may specifically refer to a case where the first receiving circuit 40 is the target switching circuit, and this embodiment is not further limited. It is understood that in other embodiments, the second transceiver circuit 30 may be configured to support dominant set reception, the second receiver circuit 50 may be configured to support diversity reception, the first transceiver circuit 20 may be configured to support dominant set MIMO reception, and the first receiver circuit 30 may be configured to support diversity MOMO reception.

In some embodiments, referring to fig. 4, the transceiver module 201 includes: a transmitting and amplifying unit 210 and a filtering unit 200 (fig. 4 only shows the rf transceiver 10, the transceiver module 201 and its internal units, the receiving module 202).

The input end of the transmission amplifying unit 210 is connected to the radio frequency transceiver 10, and the transmission amplifying unit 210 is configured to perform power amplification on the low frequency signal output by the radio frequency transceiver 10; the two first ends of the filtering unit 200 are respectively connected to the output end of the transmission amplifying unit 210 and the input end of the receiving module 202 in a one-to-one correspondence manner, the second end of the filtering unit 200 is connected to an antenna (the second end of the filtering unit 200 is schematically connected to the first antenna ANT1 in fig. 4, it can be understood that this embodiment is applicable to a scheme in which the transceiver module 201 can switch the antenna and a scheme in which the transceiver module 201 fixes the antenna), and the filtering unit 200 is configured to filter the low-frequency signal after the power amplification of the transmission amplifying unit 210 and output the low-frequency signal to the antenna, and output the low-frequency signal received by the antenna to the receiving module 202 after the filtering.

The input end of the transmitting and amplifying unit 210 is connected to the radio frequency transceiver 10, the output end of the transmitting and amplifying unit 210 is connected to a first end of the filtering unit 200, and the second end of the filtering unit 200 is connected to the antenna, so that a transmitting path of the transceiver module 201 is formed between the input end of the transmitting and amplifying unit 210 and the second end of the filtering unit 200, so as to implement amplification processing and filtering processing of the low frequency signal output by the radio frequency transceiver 10; the second end of the filtering unit 200 is connected to the antenna, and the other first end of the filtering unit 200 is connected to the receiving module 202, so that a receiving path of the transceiver module 201 is formed between the second end of the filtering unit 200 and the other first end of the filtering unit 200, so as to receive the low-frequency signal from the antenna and implement filtering processing on the low-frequency signal. Therefore, the transceiver module 201 can realize the transceiving of the low-frequency signal and the power amplification and filtering processing of the low-frequency signal through the transmitting and amplifying unit 210 and the filtering unit 200.

On one hand, the filtering unit 200 may perform filtering processing on the received low-frequency signal of the preset frequency band to filter out stray waves outside the frequency band, and only output the low-frequency signal of the frequency band; on the other hand, the filtering unit 200 may also isolate the signal between the transmitting amplifying unit 210 and the receiving module 202, for example, separate the transceiving path of the low frequency signal according to the signal direction of the low frequency signal, so as to achieve the isolation effect.

Alternatively, the transmitting and amplifying unit 210 and the filtering unit 200 may form an integrated circuit, or may be configured by two Modules, and when the transmitting and amplifying unit 210 and the filtering unit 200 form an integrated circuit, the transceiver module 201 may be a Low frequency Power Amplifier module (LB L-PA Mid, low Band Power Amplifier Modules) with a built-in filtering module. The LB L-PA Mid is configured with corresponding ports to enable connection between the external-hanging filtering unit 200 and the transmit amplifying unit 210.

Optionally, the transmitting and amplifying unit 210 may include a power amplifier, the filtering unit 200 may include a duplexer or a filter, when the filtering unit 200 includes a duplexer, two first terminals of the duplexer correspond to two first terminals of the filtering unit 200, and a second terminal of the duplexer corresponds to a second terminal of the filtering unit 200; when the filtering unit 200 includes filters, the filtering unit 200 may include two filters and a switch device, first ends of the two filters are respectively connected to two first ends of the switch device, second ends of the two filters are respectively connected to the receiving and transmitting input ends in a one-to-one correspondence manner, and a second end of the switch device is connected to the receiving and transmitting end.

In some embodiments, referring to fig. 5 (fig. 5 only shows the rf transceiver 10, the transceiver module 201, and the receiving module 202), the low frequency signals may include rf signals of a plurality of low frequency bands; the number of the filtering units 200 may be plural; the transceiver module 201 further includes: a first gating unit 220, a first end of the first gating unit 220 being connected to an output end of the transmission amplifying unit 210; and a second gating unit 230, a first end of the second gating unit 230 being connected to the antenna.

Two first ends of each filtering unit 200 are respectively connected with a second end of the first gating unit 220 and the receiving module 202 in a one-to-one correspondence manner, the second end of each filtering unit 200 is connected with a second end of the second gating unit 230, and the frequency bands of the low-frequency signals output by each filtering unit 200 are different; the first gating unit 220 and the second gating unit 230 are used to jointly select and conduct the rf path between the transmission amplifying unit 210 and the antenna and the rf path between the receiving module 202 and the antenna. Specifically, a first end of the first gating unit 220 is connected to the output end of the transmission amplifying unit 210, each second end of the first gating unit 220 is connected to a first end of each filtering unit 200, a first end of the second gating unit 230 is connected to a second end of each filtering unit 200, a second end of the second gating unit 230 is connected to the antenna, the first gating unit 220 and the second gating unit 230 jointly select to conduct at least one transmission path between the transmission amplifying unit 210 and the antenna and at least one reception path between the receiving module 202 and the antenna, the insertion loss of the transceiving module 201 can be reduced through the first gating unit 220 and the second gating unit 230, and the output power of the transceiving module 201 can be improved. Alternatively, the first and second gating units 220 and 230 are multi-channel selection switches, respectively.

Through the plurality of filtering units 200, the first gating unit 220, and the second gating unit 230, the transceiver module 201 can support amplification processing and filtering processing of low-frequency signals of a plurality of different frequency bands. For example, each filtering unit 200 includes one duplexer, the low-frequency signals are signals of five different frequency bands N5, N8, N20, N28, and N71, and five duplexers may be correspondingly disposed to implement filtering processing on the five low-frequency signals. It should be noted that, in other embodiments, when it is necessary to support correlation processing on low-frequency signals of multiple different frequency bands, one filtering unit 200 may also be provided, for example, the filtering unit 200 is provided to include multiple duplexers.

In some embodiments, referring to fig. 6 (fig. 6 only shows the rf transceiver 10, the transceiver module 201, and the receiving module 202), the transceiver module 201 may further include a coupling unit 240 respectively connected to the second gating unit 230 and the antenna for coupling the low-frequency signal in the rf path between the second gating unit 230 and the antenna to output the coupled signal. The coupling unit 240 may be a conventional coupling device, and is not limited herein. In other embodiments, please refer to fig. 6 with continued assistance, the transceiver module 201 further includes a 2G low-frequency amplifying unit 250 and a 2G high-frequency amplifying unit 260. The 2G low-frequency amplification unit 250 and the 2G high-frequency amplification unit 260 can respectively perform amplification processing on the 2G low-frequency signal and the 2G high-frequency signal. The input ends of the 2G low-frequency amplification unit 250 and the 2G high-frequency amplification unit 260 are both connected to the radio frequency transceiver 10,2G, and the output end of the low-frequency amplification unit 250 is connected to the output end of the second gating unit 230,2G, and the output end of the high-frequency amplification unit 260 may be connected to another antenna (fig. 6 illustrates a fifth antenna ANT5 as an example).

In some embodiments, at least one of the plurality of filtering units 200 is the built-in filtering unit 200, and the transmission amplifying unit 210, the first gating unit 220, the second gating unit 230, and the built-in filtering unit 200 form an integrated circuit configured with an input port, an output port, and an antenna port. Wherein: the input port is connected to the input terminal of the transmission amplifying unit 210 and the radio frequency transceiver 10, the output port is connected to a first end of the built-in filtering unit 200 and the receiving module 202, and the antenna port is connected to a first end of the second gating unit 230 and the antenna.

Through the integration of the transmitting amplification unit 210, the first gating unit 220, the second gating unit 230 and the built-in filtering unit 200, the area of a mainboard occupied by a radio frequency system can be reduced, the integration level of devices is improved, the miniaturization of the devices is facilitated, and the cost is reduced; meanwhile, the insertion loss in the transmitting process and the receiving process can be reduced, the output power of the transceiver module 201 and the receiving module 202 to the low-frequency signal is improved, the sensitivity performance of the low-frequency signal is improved, and further the communication performance of the radio frequency system can be improved.

Based on the embodiment of fig. 6, as shown IN fig. 7, the plurality of filter units 200 are all built-IN filter units 200 (only two filter units 200 are shown IN fig. 7, where PA IN is an input port, RX is an output port, and LB ANT1 is an antenna port): the plurality of filtering units 200 are all built-in filtering units 200, the transmitting and amplifying unit 210, the first gating unit 220, the second gating unit 230 and all the filtering units 200 are integrated into a transceiving module 201, and the transceiving module 201 is configured with an input port, an output port and an antenna port; wherein: the input ports are respectively connected to the input end of the transmission amplifying unit 210 and the radio frequency transceiver 10, the output ports are respectively connected to a first end of the built-in filtering unit 200 and the receiving module 202, and the antenna ports are respectively connected to a first end of the second gating unit 230 and an antenna (schematically illustrated by a first antenna ANT1 in the figure).

In some embodiments, at least one of the plurality of filtering units 200 is an external filtering unit 200, the transmitting and amplifying unit 210, the first gating unit 220, and the second gating unit 230 integrate the transceiving module 201, and the transceiving module 201 is configured with an input port, an auxiliary transmitting port, an auxiliary transceiving port, and an antenna port. Wherein: the input port is connected to the input terminal of the transmission amplifying unit 210 and the rf transceiver 10, the auxiliary transmitting terminal is connected to a first terminal of the external filtering unit 200 and a second terminal of the first gating unit 220, the auxiliary transmitting/receiving port is connected to a second terminal of the second gating unit 230 and a second terminal of the external filtering unit 200, and the antenna port is connected to a first terminal of the second gating unit 230 and an antenna.

By externally hanging at least one filtering unit 200, the low-frequency signals cooperatively received and transmitted by the transceiver module 201 and the receiving module 202 can be filtered, and the isolation effect of the external filtering unit 200 on the low-frequency signals is improved.

Based on the embodiment of fig. 6, as shown IN fig. 8, one of the plurality of filter units 200 is an external filter unit 200 for example (only one internal filter unit 200 is shown IN fig. 8, the internal filter unit 200 is connected to the receiving module 202 through an output port RX of the integrated circuit, where PA IN is an input port, LB TXOU is an auxiliary transmitting port, LB TRX is an auxiliary transmitting/receiving port, and LB ANT1 is an antenna port): two first ends of the external filtering unit 200 are respectively connected to the auxiliary transmitting port and the receiving module 202 in a one-to-one correspondence manner, a second end of the external filtering unit 200 is connected to the auxiliary transmitting/receiving port so as to be connected to a second end of the second gating unit 230 through the auxiliary transmitting/receiving port, and the antenna port is respectively connected to the first end of the second gating unit 230 and the antenna.

In some embodiments, in a case where the transceiver circuit and the target switching circuit are configured to be switchably connected to at least two antennas, the radio frequency system may implement switching of the antennas through a switching module built in the transceiver module 201, as shown in fig. 9, the transceiver module 201 further includes: a switching unit 270.

A plurality of first terminals of the switching unit 270 are respectively connected to the second terminal of the filtering unit 200 and the target switching circuit in a one-to-one correspondence manner, a plurality of second terminals of the switching unit 270 are respectively connected to the at least two antennas in a one-to-one correspondence manner, and the switching unit 270 is configured to switchably connect the filtering unit 200 and the target switching circuit to the at least two antennas.

For example, when the target switching circuit is the first receiving circuit 40, the switching unit 270 may be configured with two first terminals and two second terminals, the two first terminals of the switching unit 270 are respectively connected to the second terminal of the filtering unit 200 and the first receiving circuit 40, and the two second terminals of the switching unit 270 are respectively connected to the first antenna ANT1 and the second antenna ANT2, so that the filtering unit 200 and the first receiving circuit 40 are switchably connected to the first antenna ANT1 and the second antenna ANT2 through the switching unit 270. Alternatively, when the target switching circuit is the first receiving circuit 40, the first switching circuit 60 may be a double pole double throw switch. Other embodiments are not intended to be exemplary.

The switching unit 270 and the transmitting and amplifying unit 210 may form an integrated circuit, or the switching unit 270, the transmitting and amplifying unit 210 and the filtering unit 200 may be an integrated circuit. When the integrated circuit is formed, the integrated circuit may be configured with at least two switching ports and at least one connection port, the number of the switching ports is the same as the total number of the transceiver module 201 and the target switching circuit, and the number of the connection ports is the same as the total number of the target switching circuit. For example, when the target switching circuit includes only one path, two second terminals of the switching unit 270 are respectively connected to two switching ports, each switching port is connected to the antenna, two first terminals of the switching unit 270 are respectively connected to the filtering unit 200 and the connection port, and the connection port is connected to the target switching circuit.

As described in the embodiment based on fig. 7, as shown in fig. 10, the integrated circuit may further be configured with two switching ports (the switching port ANT101 and the switching port ANT102, respectively) and a connection port (CAX), and the switching unit 270 may be a double-pole double-throw switch. The two switching ports are respectively connected with the first antenna ANT1 and the second antenna ANT2 in a one-to-one correspondence manner, and the connecting port is connected with the first receiving circuit 40; two first ends of the switching unit 270 are respectively connected to the coupling unit 240 and the connection port, and two second ends of the switching unit 270 are respectively connected to the two switching ports, so as to switchably connect the coupling unit 240 and the connection port to the two switching ports.

In some embodiments, the receiving module 202 may be an LNA bank (radio frequency receiving module, also called multi-channel multi-mode low noise amplifier module), and a low noise amplifier, a radio frequency switch, and the like may be integrated inside the LNA bank device, and may be configured to support receiving processing of low frequency signals. By arranging the LNA bank device, the integration level of the radio frequency system can be improved, the occupied space of the radio frequency system is reduced, and the miniaturization design of the radio frequency system is facilitated. Optionally, the LNA bank device may also be used to connect other antennas to support reception of intermediate and high frequency signals.

In some embodiments, the first receiving circuit 40 may be a radio frequency Low noise amplifier module (LFEM), which is referred to as an LFEM device for short, and a Low noise amplifier, a radio frequency switch, a duplexer or a filter, etc. may be integrated inside the LFEM device, and may be used to support receiving processing of a Low frequency signal. By arranging the LFEM device, the integration level of the radio frequency system can be improved, the occupied space of the radio frequency system is reduced, and the miniaturization design of the radio frequency system is facilitated. Optionally, the LFEM device may also be used to connect other antennas to support reception of intermediate and high frequency signals.

In some embodiments, referring to fig. 11 (not shown in the figures, the transceiver module 201, the receiving module 202, and the first receiving circuit 40), the second transceiver circuit 30 may include: a power amplification module 301, a first low noise amplification module 302 and a first filtering module 303.

The input end of the power amplification module 301 is connected with the radio frequency transceiver 10, and the power amplification module 301 is used for performing power amplification processing on the received low-frequency signal; the output end of the first low-noise amplification module 302 is connected with the radio frequency transceiver 10, and the first low-noise amplification module 302 is configured to perform low-noise amplification processing on the received low-frequency signal; two first ends of the first filtering module 303 are respectively connected with the output end of the power amplifying module 301 and the input end of the first low-noise amplifying module 302 in a one-to-one correspondence manner, and a second end of the first filtering module 303 is connected with an antenna and is used for filtering the received low-frequency signal.

The power amplification module 301 may include a power amplifier to perform power amplification processing on the received low-frequency signal; the first low-noise amplification module 302 may include a low-noise amplifier to perform low-noise amplification processing on the received low-frequency signal; the first filtering module 303 may include a duplexer or a filter, when the first filtering module 303 includes a duplexer, two first ends of the duplexer correspond to two first ends of the first filtering module 303, and a second end of the duplexer corresponds to a second end of the first filtering module 303; when the first filtering module 303 includes filters, the first filtering module 303 may include two filters and a switch device, first ends of the two filters are respectively connected to two first ends of the switch device, second ends of the two filters are respectively connected to the transmitting input end and the receiving output end in a one-to-one correspondence, and a second end of the switch device is connected to the transceiving end. Optionally, as shown in fig. 11, the second transceiver circuit 30 may further include: a coupling module 304 for low frequency signals in the radio frequency path between the first filtering module 303 and the antenna. The coupling module 304 may include a coupler, etc., and is not further limited herein.

In some embodiments, please refer to fig. 11 again, the second receiving circuit 50 may include a second low noise amplifying module 501 and a second filtering module 502, an input terminal of the second filtering module 502 is connected to the antenna, an output terminal of the second filtering module 502 is connected to an input terminal of the second low noise amplifying module 501, and an output terminal of the second low noise amplifying module 501 is connected to the radio frequency transceiver 10. Optionally, the second low noise amplification module 501 may include a low noise amplifier, and the second filtering module 502 may include a filter, which is not further limited herein.

The second low noise amplification module 501 and the second filtering module 502 of the second receiving circuit 50 are disposed outside other receiving circuits, and the external second low noise amplification module 501 and the external second filtering module 502 may be disposed at a position close to the antenna side, so that the receiving performance of the second receiving circuit 50 may be improved, and the problem of low efficiency caused by environmental problems may be avoided. It is to be understood that the second transceiver circuit 30 and the second receiver circuit 50 shown in fig. 11 may be fixedly connected to the antenna, or may be switchably connected to the antenna, respectively, and fig. 11 is only illustrated as an embodiment of fixedly connected to the antenna.

Referring to fig. 12-15, fig. 12-15 are specific circuit diagrams of four embodiments of a radio frequency system (taking a filter unit 200 disposed outside an integrated circuit as an example), wherein fig. 12 corresponds to an embodiment in which each circuit is fixedly connected to each antenna, fig. 13 corresponds to an embodiment in which a first transceiver circuit 20 and a first receiver circuit 40 are switchably connected to a first antenna ANT1 and a second antenna ANT2 and the radio frequency system includes a first switching circuit 60, fig. 14 corresponds to an embodiment in which the first transceiver circuit 20 and the first receiver circuit 40 are switchably connected to the first antenna ANT1 and the second antenna ANT2 and the radio frequency system includes a switching unit 270, fig. 15 corresponds to an embodiment in which the first transceiver circuit 20 and the first receiver circuit 40 are switchably connected to the first antenna ANT1 and the second antenna ANT2 through the first switching circuit 60, and the second transceiver circuit 30 and the second receiver circuit 50 are switchably connected to the third antenna ANT3 and the fourth antenna ANT4 through the second switching circuit 70, as shown in fig. 12-15, the transceiver module 201 includes an external duplexer (e.g., du1 in the figure) and an internal duplexer (e.g., du2 in the figure), further includes a power amplifier (e.g., LB PA1, etc.), a multi-channel selection switch (e.g., SP8T1, etc.), a filter (e.g., F1, F2), etc. integrated with the internal duplexer, and the transceiver module 201 of fig. 14 further includes an internal double-pole double-throw switch DPDT3; the receiving module 202 integrates a plurality of low noise amplifiers (e.g., LNA1, LNA2, etc.) and a multi-channel selection switch (e.g., SP4T1, etc.); the first receiving circuit 40 integrates a plurality of low noise amplifiers (e.g., LNAs 6, LMA 7) and a multi-channel selection switch (e.g., SP4T7, etc.); the second transceiving circuit 30 includes a power amplifier (e.g., LB PA 2), a low noise amplifier (e.g., LNA 8), and a duplexer (e.g., du 3); the second receiving circuit 50 also includes a low noise amplifier (e.g., LNA 9) and a filter (e.g., F10); fig. 13 shows that the rf system further includes an external double-pole double-throw switch DPDT2, and fig. 15 shows that the rf system further includes an external double-pole double-throw switch DPDT4.

For convenience of explanation, the process of two-way transmission and four-way reception of the low-frequency signal in the present embodiment is explained based on the radio frequency system shown in fig. 12:

a first transmission path: the rf transceiver 10 outputs an N28 signal to the power amplifier LB PA1, performs power amplification through the power amplifier LB PA1, and then transmits the signal to the duplexer Du1 through the auxiliary input port, where the duplexer Du1 filters an out-of-band signal, and then transmits the signal to the multi-channel selection switch SP8T2 and the coupler Co1 through the auxiliary transceiving port to transmit the signal to the first antenna ANT1.

A second transmission path: the rf transceiver 10 outputs an N28 signal to the power amplifier LB PA2, performs power amplification through the power amplifier LB PA2, filters an out-of-band signal through the duplexer Du3, and transmits the out-of-band signal to the third antenna ANT3 through the coupler Co 2.

A first reception path: the first antenna ANT1 receives an N28 signal from the space, the N28 signal is transmitted to the duplexer Du1 through the multi-channel selection switch SP8T2 and the auxiliary transceiver end for filtering, then is output to the low noise amplifier LNA2 through the auxiliary receiver end, performs low noise amplification processing on the N28 signal, and finally is output to the radio frequency transceiver 10 through the output port, so as to implement primary diversity reception (PRX) on the N28 signal.

A second reception path: the second antenna ANT2 receives the N28 signal from the space, the N28 signal enters a second receiving circuit (the LFEM device is taken as an example in the figure), the out-of-band signal is filtered by a multichannel selection switch SP8T3 and a filter F3, and then the out-of-band signal is output to a double-pole double-throw switch DPDT1 through a low noise amplifier LNA7 and finally output to the radio frequency transceiver 10, so as to implement Diversity Reception (DRX) on the N28 signal.

A third reception path: the third antenna ANT3 receives an N28 signal from the space, enters the duplexer Du3 through the coupler Co2, filters an out-of-band signal, and then outputs the out-of-band signal to the low noise amplifier LNA8, performs low noise amplification processing on the N28 signal, and finally outputs the out-of-band signal to the radio frequency transceiver 10, so as to implement primary set MIMO reception (PRX MIMO) on the N28 signal.

A fourth reception path: the fourth antenna ANT4 receives an N28 signal from space, and the N28 signal filters an out-of-band signal through the filter F10, and then outputs the out-of-band signal to the low noise amplifier LNA9, performs low noise amplification on the N28 signal, and finally outputs the out-of-band signal to the radio frequency transceiver 10, so as to implement diversity MIMO reception (DRX MIMO) on the N28 signal.

The present application further provides a communication device, including the radio frequency system in the above embodiment, the communication device can support dual-channel transmission of low-frequency signals and 4 x 4mimo receiving function through the radio frequency transceiver, the transceiver module and the receiving module of the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit. Compared with the radio frequency system which can only support low-frequency signal 2 x 2mimo reception in the related art, the downlink receiving rate of the low-frequency signal of the radio frequency system of the embodiment can be doubled, the downlink coverage distance is doubled, and the channel capacity, the transmitting performance and the receiving performance of the radio frequency system can be doubled.

As shown in fig. 16, further, the above communication device is a mobile phone 11 for example, and specifically, as shown in fig. 16, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24 of the above embodiment, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 16 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in the figures are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

The memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in memory 21 include an operating system 211, a communications module (or set of instructions) 212, a Global Positioning System (GPS) module (or set of instructions) 213, and the like.

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like. The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the handset 11. The processor 22 may also issue control commands or the like for controlling the switches in the radio frequency system 24.

The I/O subsystem 26 couples input/output peripheral devices on the cell phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I/O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient and other sensors, light emitting diodes and other status indicators, data ports, and the like. Illustratively, a user may control the operation of the handset 11 by supplying commands through the I/O subsystem 26, and may receive status information and other output from the handset 11 using the output resources of the I/O subsystem 26. For example, a user pressing button 261 may turn the phone on or off.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RM), which acts as external cache memory. By way of illustration and not limitation, RMs are available in a variety of forms, such as Static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), double data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link (Synchlink) DRM (SLDRM), memory bus (Rmbus) direct RM (RDRM), direct memory bus dynamic RM (DRDRM), and memory bus dynamic RM (RDRM).

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 examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present application. 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 application shall be subject to the appended claims.

Claims (10)

1. A radio frequency system, comprising:

the radio frequency transceiver comprises a radio frequency transceiver, and a first transceiving circuit, a second transceiving circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver; the first transceiver circuit and the second transceiver circuit are respectively used for supporting the transmission and receiving processing of low-frequency signals; the first receiving circuit and the second receiving circuit are respectively used for supporting the receiving processing of the low-frequency signal; the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit are respectively connected to different antennas;

wherein the first transceiving circuit comprises:

the receiving and transmitting module is used for carrying out power amplification and filtering processing on the low-frequency signal output by the radio frequency receiving and transmitting device and outputting the low-frequency signal to the antenna and carrying out filtering processing on the low-frequency signal from the antenna;

and the receiving module is connected with the transceiving module and used for receiving the low-frequency signal filtered by the transceiving module and amplifying the low-frequency signal.

2. The rf system of claim 1, wherein the transceiver module and a target switching circuit are configured to be switchably connected to at least two of the antennas, the target switching circuit including at least one of the second transceiver circuit, the first receiver circuit, and the second receiver circuit.

3. The radio frequency system of claim 2, further comprising:

the antenna switching device comprises a first switching circuit, a plurality of first ends of the first switching circuit are respectively connected with the transceiving module and the target switching circuit in a one-to-one correspondence mode, a plurality of second ends of the first switching circuit are respectively connected with at least two antennas in a one-to-one correspondence mode, and the first switching circuit is used for connecting the transceiving module and the target switching circuit to the at least two antennas in a switchable mode.

4. The radio frequency system of claim 2, wherein the transceiver module and the first receiving circuit are configured to be switchably connected to a first antenna and a second antenna; the radio frequency system further comprises:

and two first ends of the second switching circuit are respectively connected with the second transceiver circuit and the second receiving circuit in a one-to-one correspondence manner, two second ends of the second switching circuit are respectively connected with a third antenna and a fourth antenna in a one-to-one correspondence manner, and the second switching circuit is used for switchably connecting the second transceiver circuit and the second receiving circuit to the third antenna and the fourth antenna.

5. The radio frequency system according to claim 1 or 2, wherein the transceiver module comprises:

the input end of the transmitting and amplifying unit is connected with the radio frequency transceiver, and the transmitting and amplifying unit is used for performing power amplification on the low-frequency signal output by the radio frequency transceiver;

the power amplification device comprises a transmitting amplification unit, a receiving module, a filtering unit and a control unit, wherein the transmitting amplification unit is used for amplifying the power of the transmitting amplification unit, the receiving module is used for receiving the low-frequency signals, the two first ends of the filtering unit are respectively connected with the output end of the transmitting amplification unit and the input end of the receiving module in a one-to-one correspondence manner, the second end of the filtering unit is connected with an antenna, the filtering unit is used for filtering the low-frequency signals after the power of the transmitting amplification unit is amplified and outputting the low-frequency signals to the antenna, and the low-frequency signals received by the antenna are output to the receiving module after being filtered.

6. The radio frequency system of claim 5, wherein in the case where the transceiver circuitry and target switching circuitry are configured to switchably connect to at least two antennas, the transceiver module further comprises:

and a plurality of first ends of the switching unit are respectively connected with the second ends of the filtering unit and the target switching circuit in a one-to-one correspondence manner, a plurality of second ends of the switching unit are respectively connected with the at least two antennas in a one-to-one correspondence manner, and the switching unit is used for switchably connecting the filtering unit and the target switching circuit to the at least two antennas.

7. The radio frequency system according to claim 5, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the number of the filtering units is multiple; the transceiver module further comprises:

the first end of the first gating unit is connected with the output end of the emission amplifying unit;

a second gating unit, a first end of which is connected with the antenna;

the two first ends of each filtering unit are respectively connected with a second end of the first gating unit and the receiving module in a one-to-one correspondence manner, the second end of each filtering unit is connected with a second end of the second gating unit, and the frequency bands of the low-frequency signals output by each filtering unit are different; the first gating unit and the second gating unit are used for jointly selecting and conducting a radio frequency path between the transmitting amplification unit and the antenna and a radio frequency path between the receiving module and the antenna.

8. The radio frequency system according to claim 7, wherein at least one of the plurality of filtering units is a built-in filtering unit, and the transmission amplifying unit, the first gating unit, the second gating unit, and the built-in filtering unit form an integrated circuit configured with an input port, an output port, and an antenna port; wherein:

the input port is connected with the input end of the transmitting amplification unit and the radio frequency transceiver respectively, the output port is connected with a first end of the built-in filtering unit and the receiving module respectively, and the antenna port is connected with a first end of the second gating unit and the antenna respectively.

9. The radio frequency system according to claim 7, wherein at least one of the plurality of filtering units is an external filtering unit, the transmitting amplifying unit, the first gating unit and the second gating unit form an integrated circuit, and the integrated circuit is configured with an input port, an auxiliary transmitting port, an auxiliary transceiving port and an antenna port; wherein:

the input port is connected with the input end of the transmitting amplification unit and the radio frequency transceiver respectively, the auxiliary transmitting end is connected with a first end of the external filtering unit and a second end of the first gating unit respectively, the auxiliary transceiving port is connected with a second end of the second gating unit and a second end of the external filtering unit respectively, and the antenna port is connected with a first end of the second gating unit and an antenna respectively.

10. A communication device, comprising:

the radio frequency system of any one of claims 1-9.

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