CN114124145B

CN114124145B - Radio frequency system and communication equipment

Info

Publication number: CN114124145B
Application number: CN202111447348.1A
Authority: CN
Inventors: 陈锋; 仝林
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-05-05
Anticipated expiration: 2041-11-30
Also published as: WO2023098110A1; CN114124145A

Abstract

The application relates to a radio frequency system and a communication device, the radio frequency system comprising a radio frequency transceiver; the radio frequency transceiver module is configured with a first antenna port and a second antenna port and is used for supporting the reception of low-frequency signals through the first antenna port and the second antenna port; the radio frequency receiving module is configured with a third antenna port and a fourth antenna port and is used for supporting the reception of low-frequency signals through the third antenna port and the fourth antenna port; at least two of the first, second, third and fourth antenna ports are configured to switchably connect at least two antennas of the antenna group, and the at least two ports include the first antenna port. The radio frequency system can realize 4 x 4MIMO receiving of low-frequency signals, when the radio frequency system is applied to communication equipment, the downloading rate can be improved to improve the user experience, and when the communication equipment is positioned in weak signal environments such as cell edges, building depths, elevators and the like, the radio frequency system has better receiving performance through 4 x 4MIMO receiving.

Description

Radio frequency system and communication equipment

Technical Field

The present disclosure 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 technology, mobile communication technology is gradually beginning to be applied to communication devices, such as mobile phones and the like. With the development and progress of technology, 5G mobile communication technology is gradually beginning to be applied to electronic devices. The 5G mobile communication technology has a communication frequency higher than that of the 4G mobile communication technology. The conventional rf system has poor reception performance for receiving a 5G low frequency signal (e.g., an N28 band signal) in a region where signals such as a cell edge, a deep building, or an elevator are poor.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can improve the receiving performance of low-frequency signals.

A radio frequency system comprising:

a radio frequency transceiver;

the radio frequency transceiver module is connected with the radio frequency transceiver and is configured with a first antenna port and a second antenna port, and the radio frequency transceiver module is used for supporting the main set receiving of the low-frequency signals through the first antenna port and supporting the MIMO receiving of the low-frequency signals through the second antenna port;

the radio frequency receiving module is connected with the radio frequency transceiver and is configured with a third antenna port and a fourth antenna port, and is used for supporting diversity reception of the low-frequency signals through the third antenna port and MIMO reception of the low-frequency signals through the fourth antenna port;

Wherein at least two of the first antenna port, the second antenna port, the third antenna port, and the fourth antenna port are configured to switchably connect at least two antennas of an antenna group, and the antennas connected by different ports are different; the at least two ports include the first antenna port.

A communication device comprising a radio frequency system as described above.

The radio frequency system comprises a radio frequency transceiver, a radio frequency receiving and transmitting module and a radio frequency receiving module, wherein the radio frequency transceiver is respectively connected with the radio frequency receiving and transmitting module and the radio frequency receiving module. The radio frequency receiving and transmitting module is configured with a first antenna port and a second antenna port, and is used for supporting the main set receiving of the low-frequency signals through the first antenna port and supporting the MIMO receiving of the low-frequency signals through the second antenna port; the radio frequency receiving module is configured with a third antenna port and a fourth antenna port, and is used for supporting diversity reception of low-frequency signals through the third antenna port and MIMO reception of the low-frequency signals through the fourth antenna port; at least two ports of the first antenna port, the second antenna port, the third antenna port and the fourth antenna port are configured to be switchably connected with at least two antennas of the antenna group, and antennas connected by different ports are different; the at least two ports comprise the first antenna port, so that uplink signals can be distributed on antennas with better antenna efficiency, and the working communication performance of the radio frequency system is further improved. The radio frequency system provided by the embodiment can support 4 x 4MIMO receiving of the low-frequency band radio frequency signals, and can improve throughput of the low-frequency signals by times; when the radio frequency system is applied to communication equipment, the downloading rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned in weak signal environments such as cell edges, building depths and elevators, the communication equipment is received through 4 x 4MIMO, so that the communication equipment has higher diversity gain and larger coverage range and better receiving performance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an RF system in one embodiment;

FIG. 2 is a schematic diagram of the location of an antenna in one embodiment;

FIG. 3 is a schematic diagram of an RF transceiver module according to an embodiment;

FIG. 4 is a second schematic diagram of an RF transceiver module according to an embodiment;

FIG. 5 is a schematic diagram of a specific structure of a radio frequency transceiver module according to one embodiment;

FIG. 6 is a third schematic diagram of an RF transceiver module according to an embodiment;

FIG. 7 is a schematic diagram of a RF transceiver module in one embodiment;

FIG. 8 is a second schematic diagram of an embodiment of a RF transceiver module;

FIG. 9 is a schematic diagram of an RF receiver module according to an embodiment;

FIG. 10 is a schematic diagram of a specific structure of an RF receiver module according to one embodiment;

FIG. 11 is a second exemplary diagram of an RF receiver module according to one embodiment;

FIG. 12 is a second schematic diagram of an RF system in one embodiment;

FIG. 13 is a third schematic diagram of an RF system in one embodiment;

FIG. 14 is a fourth schematic diagram of an RF system in one embodiment;

FIG. 15 is a schematic diagram of a RF system in one embodiment;

FIG. 16 is a schematic diagram of one embodiment of a radio frequency system;

FIG. 17 is a schematic diagram of a RF system in one embodiment;

FIG. 18 is a schematic diagram of a RF system in one embodiment;

FIG. 19 is a second schematic diagram of an embodiment of a radio frequency system;

FIG. 20 is a schematic diagram of an RF system in one embodiment;

FIG. 21 is a diagram of a ninth embodiment of a radio frequency system;

FIG. 22 is a third schematic diagram of an embodiment of a radio frequency system;

fig. 23 is a schematic structural diagram of a communication device in one embodiment.

Detailed Description

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

It will be understood that the terms "first," "second," and the like, 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 client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.

The radio frequency system according to the embodiments 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 types of User Equipment (UE) (e.g., a Mobile Station, MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices.

As shown in fig. 1, in one embodiment, a radio frequency system provided in an embodiment of the present application includes: a radio frequency transceiver 10, a radio frequency transceiver module 20, a radio frequency receiving module 30; the antenna group is further included (fig. 1 illustrates, by way of illustration only, and not limitation, a structure in which the antenna group includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4, the radio frequency transceiver module 20 is connected to the first antenna ANT1, and the radio frequency receiver module 30 is connected to the second antenna ANT 2).

In this embodiment, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are all capable of supporting transmission and reception of radio frequency signals of NR low frequencies and multiple frequency bands. Each antenna may be formed using any suitable type of antenna. For example, each antenna may include an antenna with a resonating element formed from the following antenna structure: 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, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and combinations of frequency bands. In the embodiment of the present application, the types of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are not further limited.

Alternatively, the low frequency signal may include a radio frequency signal in a low frequency band, and may also include radio frequency signals in a plurality of low frequency bands. The radio frequency signal may include at least one of a 4G LTE low frequency signal and a 5G NR low frequency signal. The frequency band division of the low frequency signal is shown in table 1.

Table 1 shows a frequency band division table of low frequency signals

It should be noted that, in the 5G network, the frequency band used by the 4G is used, only the identifier before the sequence number is changed, and the plurality of low frequency bands of the low frequency signal are not limited to the above-mentioned examples.

Optionally, the low frequency signals include N5, N8, N20, N28, and N71 frequency band signals, and the radio frequency system may support a 4 x 4mimo receiving function of the N5, N8, N20, N28, and N71 frequency band signals.

The MIMO (Multiple Input Multiple Output, multiple-transmit multiple-receive) technology refers to using multiple transmit antennas and receive antennas at a transmit port and a receive port, respectively, making full use of space resources, and implementing multiple-transmit multiple-receive through multiple antennas, so that the channel capacity of the system can be doubled without increasing spectrum resources and antenna transmit power.

In the present embodiment, the rf transceiver 10 may be configured with a plurality of ports to connect with the rf transceiver module 20 and the rf receiving module 30. Optionally, the rf transceiver 10 includes a transmitter for transmitting an rf signal to the rf transceiver module 20, and a receiver for receiving the rf signals output from the rf transceiver module 20 and the rf receiver module 30.

In this embodiment, the radio frequency transceiver module 20 is connected to the radio frequency transceiver 10 and is configured with a first antenna port LB ANT1 and a second antenna port LB ANT2, and the radio frequency transceiver module 20 is configured to support main set reception of low frequency signals through the first antenna port LB ANT1 and MIMO reception of low frequency signals through the second antenna port LB ANT 2.

The radio frequency transceiver module 20 is configured to support transmission and main set reception of a plurality of low frequency signals through the first antenna port LB ANT1, and support main set MIMO reception of a plurality of low frequency signals through the second antenna port LB ANT 2.

The rf transceiver module 20 is further configured with an input port PA IN and an output port LNA OUT, the input port PA IN of the rf transceiver module 20 is connected to the rf transceiver 10, the output port LNA OUT of the rf transceiver module 20 is connected to the rf transceiver 10, and a transmit path between the input port PA IN and the first antenna port LB ANT1 and a receive path between the output port LNA OUT and the first antenna port LB ANT1 are configured to connect to the same antenna. The radio frequency transceiver module 20 is configured to perform filtering amplification processing on a low frequency signal sent by the radio frequency transceiver 10, output the low frequency signal to the first antenna port LB ANT1, and transmit the low frequency signal through an antenna of an antenna group connected to the first antenna port LB ANT1, so as to implement transmission control on the low frequency signal; the low-frequency signal is further used for receiving the received low-frequency signal through the first antenna port LB ANT1, filtering and amplifying the low-frequency signal, and outputting the low-frequency signal to the radio-frequency transceiver 10 through the output port LNA OUT to realize the receiving control of the low-frequency signal. Alternatively, the rf transceiver module 20 may be understood as a low frequency power amplifier module (LB L-PA Mid, low Band Power Amplifier Modules including Duplexers) with a built-in low noise amplifier.

Optionally, the radio frequency transceiver module 20 is further configured to implement a reception switching control, a transmission switching control, and a switching control between transmission and reception for a plurality of low frequency signals. Specifically, one of the plurality of low frequency signals may be selected for transmission and main set reception through the first antenna port LB ANT1, and one of the plurality of low frequency signals may be selected for main set MIMO reception through the second antenna port LB ANT 2. Optionally, the radio frequency transceiver module 20 may transmit and receive the low frequency signals of more than two frequency bands through the first antenna port LB ANT1 at the same time, and perform main set MIMO receiving on the low frequency signals of more than two frequency bands through the second antenna port LB ANT 2.

In this embodiment, the radio frequency receiving module 30 is connected to the radio frequency transceiver 10 and is configured with a third antenna port LB ANT3 and a fourth antenna port LB ANT4, and the radio frequency receiving module 30 is configured to support diversity reception of low frequency signals through the third antenna port LB ANT3 and MIMO reception of low frequency signals through the fourth antenna port LB ANT 4.

The rf receiving module 30 is configured to support diversity reception of a plurality of low frequency signals through the third antenna port LB ANT3, and support diversity MIMO reception of a plurality of low frequency signals through the fourth antenna port LB ANT 4. Specifically, the rf receiving module 30 is further configured with an output port LNA OUT, the output port LNA OUT of the rf receiving module 30 is connected to the rf transceiver 10, the rf receiving module 30 receives the low-frequency signal received by the antenna of the antenna group through the third antenna port LB ANT3, performs filtering amplification processing on the low-frequency signal, and outputs the low-frequency signal to the rf transceiver 10 through the output port LNA OUT of the rf receiving module 30, so as to implement reception control of the low-frequency signal. Alternatively, the radio frequency receiving module 30 may be understood as a low noise amplifier module (LFEM, low Noise AmPlifier FrontEnd Modules), which may specifically include a low noise amplifier and a plurality of filters, etc., and may be used to support the receiving process of the low frequency signal.

Alternatively, the rf receiving module 30 may select one of the plurality of low frequency signals for diversity reception through the third antenna port LB ANT3, and select one of the plurality of low frequency signals for diversity MIMO reception through the fourth antenna port LB ANT 4. Alternatively, the rf receiving module 30 may simultaneously perform diversity reception on the low frequency signals of more than two frequency bands through the third antenna port LB ANT3, and perform diversity MIMO reception on the low frequency signals of more than two frequency bands through the fourth antenna port LB ANT 4.

In the present embodiment, at least two ports of the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 are configured to switchably connect at least two antennas of the antenna group, and the antennas connected by the different ports are different; the at least two ports include a first antenna port LB ANT1. By configuring the switchable connection between the at least two ports and the at least two antennas and ensuring that one of the at least two ports is the first antenna port LB ANT1, it is ensured that the at least two antennas can not only realize the functions of transmitting and receiving the main set, but also realize at least one of the functions of receiving the main set MIMO, receiving the diversity MIMO and receiving the diversity.

In an embodiment, the first antenna port LB ANT1, the third antenna port LB ANT3 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2, the second antenna port LB ANT2 is configured to connect the third antenna ANT3, and the fourth antenna port LB ANT4 is configured to connect the fourth antenna ANT4.

The first antenna port LB ANT1 and the third antenna port LB ANT3 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2, so that an antenna switching function is supported between the first antenna ANT1 and the second antenna ANT2, and transmission, main set reception and diversity reception of low-frequency signals can be supported.

Optionally, the antenna efficiency of the first antenna ANT1 and the second antenna ANT2 is higher than the efficiency of the third antenna ANT3 and the fourth antenna ANT4, the target antenna is any one of the first antenna ANT1 and the second antenna ANT2, and uplink signals can be distributed on the first antenna ANT1 or the second antenna ANT2 with better antenna efficiency, so that the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system. Alternatively, as shown in fig. 2, the first antenna ANT1 and the second antenna ANT2 are respectively disposed at a top frame 101 and a bottom frame 103 of the communication device, and the third antenna ANT3 and the fourth antenna ANT4 are disposed at two

side frames

102 and 104 of the communication device, so that the efficiency of the first antenna ANT1 and the second antenna ANT2 is higher than that of the third antenna ANT3 and the fourth antenna ANT4.

Optionally, the radio frequency transceiver 10 is configured to configure a target antenna connected to the main set of the first antenna port LB ANT1 for receiving according to the network information of the low frequency signals received by the first antenna port LB ANT1 and the third antenna port LB ANT3, where the target antenna is one of the first antenna ANT1 and the second antenna ANT 2. The network information may include, among other things, raw and processed information associated with radio performance metrics of the received low frequency signals, such as signal strength, received power, reference signal received power (Reference Signal Receiving Power, RSRP), received signal strength (Received Signal Strength Indicator, RSSI), signal to noise ratio (Signal to Noise Ratio, SNR), rank of the MIMO channel matrix (Rank), carrier to interference plus noise ratio (Carrier to Interference plus Noise Ratio, RS-CINR), frame error rate, bit error rate, reference signal received quality (Reference signal reception quality, RSRQ), and the like. Further alternatively, the radio frequency transceiver 10 may store the configuration information of the first antenna port LB ANT1 and the third antenna port LB ANT3 in advance. The configuration information may include identification information of the antenna, identification information of the first antenna port LB ANT1 and the third antenna port LB ANT3, control logic information of each switch on a radio frequency path between the first antenna port LB ANT1 and the third antenna port LB ANT3 and the first antenna ANT1 and the second antenna ANT2, respectively, and the like.

Taking the network information as the received signal strength as an example, the first antenna ANT1 is configured as a default target antenna for transmitting the low-frequency signal and receiving the main set, and if the difference between the first signal strength of the low-frequency signal received by the first antenna ANT1 and the second signal strength of the low-frequency signal received by the second antenna ANT2 is greater than or equal to a preset threshold value in a preset time period, the second antenna ANT2 is configured as the target antenna.

Specifically, when the first antenna ANT1 is configured as a target antenna for transmission and main set reception of the low frequency signal, the radio frequency transceiver 10 receives the low frequency signal received by the first antenna ANT1 and the second antenna ANT2 through the first antenna port LB ANT1, the third antenna port LB ANT3, respectively, and controls switching of the antennas according to the first signal strength of the low frequency signal received by the first antenna ANT1 and the second signal strength of the low frequency signal received by the second antenna ANT 2. More specifically, the difference of the second received signal strength minus the first received signal strength is greater than or equal to a preset threshold value for a preset time, and the second antenna ANT2 is taken as the target antenna. After determining the target antenna, the rf transceiver 10 may control the relevant logic switch of the rf system to switch on the path between the second antenna and the main set receiving path of the rf transceiver module 20, and switch on the path between the first antenna ANT1 and the diversity receiving path of the rf receiving module 30, so as to implement the transmission and main set receiving of the low frequency signal by using the second antenna ANT2, so as to improve the communication quality of the low frequency signal. If the difference is smaller than the preset threshold, the first antenna ANT1 is continuously used as the target antenna, and the current working state is maintained.

The preset threshold values are all larger than zero, and the size of the preset threshold values can be set according to requirements. By setting the judgment condition of the preset threshold value, frequent switching between antennas caused by that the signal receiving intensity of the antennas is possibly always in variation can be prevented, and the influence of the transmission efficiency of the antennas can be reduced.

In an embodiment, the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, so that an antenna switching function is supported between the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, which can support transmission of low frequency signals, main set reception, diversity reception, main set MIMO reception and diversity MIMO reception.

Optionally, the target antenna is any one of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, so that uplink signals can be distributed on an antenna with better antenna efficiency, so as to ensure the reliability of the uplink signals and improve the communication performance of the radio frequency system.

Optionally, the radio frequency transceiver 10 is configured to configure a target antenna connected to the first antenna port LB ANT1 according to the network information of the low frequency signals received by the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4, where the target antenna is one of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT 4. Specific configuration may be referred to the relevant description in the above embodiments, and will not be repeated here.

Optionally, the first antenna ANT1 is configured as a default target antenna for transmitting and receiving the low-frequency signal, and if the difference between the second signal strength of the low-frequency signal received by the second antenna ANT2 and the third signal strength of the low-frequency signal received by any one of the first antenna ANT1, the third antenna ANT3 and the fourth antenna ANT4 is greater than or equal to a preset threshold value in a preset time period, the second antenna ANT2 is configured as the target antenna. The description of the preset threshold is referred to the above embodiments, and is not repeated here.

The radio frequency system provided in this embodiment includes a radio frequency transceiver 10, a radio frequency transceiver module 20 and a radio frequency receiving module 30, where the radio frequency transceiver 10 is connected to the radio frequency transceiver module 20 and the radio frequency receiving module 30 respectively. The radio frequency transceiver module 20 is configured with a first antenna port LB ANT1 and a second antenna port LB ANT2, and the radio frequency transceiver module 20 is configured to support main set reception of low frequency signals through the first antenna port LB ANT1 and MIMO reception of low frequency signals through the second antenna port LB ANT 2; the radio frequency receiving module 30 is configured with a third antenna port LB ANT3 and a fourth antenna port LB ANT4, and the radio frequency receiving module 30 is configured to support diversity reception of low frequency signals through the third antenna port LB ANT3 and MIMO reception of low frequency signals through the fourth antenna port. At least two ports of the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 are configured to switchably connect at least two antennas of the antenna group, and the antennas connected by the different ports are different; the at least two ports comprise a first antenna port LB ANT1, so that uplink signals can be distributed on antennas with better antenna efficiency, and the communication performance of the radio frequency system operation is further improved. The radio frequency system can realize 4 x 4MIMO receiving on the supporting low-frequency band radio frequency signals, and can doubly improve the throughput of the low-frequency signals; when the radio frequency system is applied to communication equipment, the downloading rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned in weak signal environments such as cell edges, building depths and elevators, the communication equipment is received through 4 x 4MIMO, so that the communication equipment has higher diversity gain and larger coverage range and better receiving performance.

IN one embodiment, the radio frequency transceiver module 20 is further configured with an input port PA IN and an output port LNA OUT; wherein: the transmit path between the input port PA IN and the first antenna port LB ANT1, and the receive path between the output port LNA OUT and the first antenna port LB ANT1 are configured to connect the same antenna.

In one embodiment, the radio frequency system further comprises:

and the second end of the first filtering module is connected with the first antenna port LB ANT and is used for filtering stray waves except low-frequency signals.

The first filtering module may be disposed outside the rf transceiver module 20, or may be integrated inside the rf transceiver module 20, and is configured to perform filtering processing on a low-frequency signal of a transmitting path between the input port PA IN and the first antenna port LB ANT1 of the rf transceiver module 20, so as to filter stray waves other than the low-frequency signal; and is further configured to filter the low-frequency signal of the receiving path between the output port LNA OUT and the first antenna port LB ANT1 of the radio frequency transceiver module 20, so as to filter stray waves except the low-frequency signal. Meanwhile, the first filtering module is further configured to isolate signals of a transmit path between the input port PA IN and the first antenna port LB ANT1 and a receive path between the output port LNA OUT and the first antenna port LB ANT 1.

The first filtering module may be a duplexer or a filter, and when the low-frequency signal is a radio-frequency signal with a single low-frequency band, for example, an N28-band signal, the first filtering module may perform filtering processing on a stray wave outside the N28-band, and only output the N28-band signal to the first antenna ANT1 or the main set receiving circuit 30; when the low-frequency signal is a radio-frequency signal in a plurality of low-frequency bands, a plurality of first filtering modules or a plurality of diplexers or filters may be provided to respectively perform filtering processing on each low-frequency signal. When the first filtering module comprises a duplexer, two first ends of the duplexer are respectively connected with an input port PA IN and an output port LNA OUT IN a one-to-one correspondence manner, and a second end of the duplexer is connected with a first antenna port LB ANT1; when the first filtering module includes a filter, the first filtering module may include two filters and a switching device, the first ends of the two filters are respectively connected to the two first ends of the switching device, the second ends of the two filters are respectively connected to the input port PA IN and the output port LNA OUT IN one-to-one correspondence, and the second end of the switching device is connected to the first antenna port LB ANT1.

As shown in fig. 3, in one embodiment, the first filtering module 200 is integrated inside the rf transceiver module 20, and the rf transceiver module 20 includes: a transmitting unit 210, a gating unit 220, and a receiving unit 230.

In this embodiment, two first ends of the first filtering module 200 are respectively connected to the transmitting unit 210 and the receiving unit 230 in a one-to-one correspondence manner, and a second end of the first filtering module 200 is connected to the gating unit 220, where the first filtering module 200 is configured to perform filtering processing on the low-frequency signal transmitted by the transmitting unit 210 and the low-frequency signal received by the receiving unit 230. The first filtering module 200 is integrated in the radio frequency transceiver module 20, so that the main board area 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 of the receiving and transmitting link can be reduced, the output power of the radio frequency receiving and transmitting module 20 to the low-frequency signal is improved, the sensitivity performance of the low-frequency signal is improved, and the communication performance of the radio frequency system is further improved.

Optionally, the low frequency signal includes radio frequency signals of a plurality of low frequency bands; wherein: the number of the first filtering modules 200 is multiple, two first ends of each first filtering module 200 are respectively connected with the transmitting unit 210 and the receiving unit 230 in a one-to-one correspondence manner, and a second end of each first filtering module 200 is connected with the gating unit 220; the frequency band of the low frequency signal output by each first filtering module 200 is different. For example, the low frequency signals are signals in five different frequency bands of N5, N8, N20, N28, and N71, and five first filtering modules 200 may be correspondingly disposed to implement filtering processing on the four low frequency signals, and after the filtering processing of the five first filtering modules 200, the low frequency signals in five frequency bands of N5, N8, N20, N28, and N71 may be correspondingly output to the transmitting unit 210 or the receiving unit 230.

IN this embodiment, the transmitting unit 210 is connected to the input port PA IN of the rf transceiver module 20, and is configured to amplify the low-frequency signal received by the input port PA IN of the rf transceiver module 20, so as to output the amplified low-frequency signal to the first antenna port LB ANT1.

In this embodiment, the gating unit 220 is respectively connected to the transmitting unit 210, the receiving unit 230, and the first antenna port LB ANT1, and is used for selectively conducting the radio frequency paths between the transmitting unit 210, the receiving unit 230, and the first antenna port LB ANT1. The gating unit 220 can reduce insertion loss of the radio frequency transceiver module 20 for the transmitting paths and receiving paths of the plurality of low frequency signals, so that output power of the plurality of low frequency signals at the first antenna port LB ANT1 and output power at the output port LNA OUT can be improved.

In this embodiment, the receiving unit 230 is connected to the output ports (for example, two output ports are respectively the output port LNA OUT1 and the output port LNA OUT 2), the first antenna port LB ANT1, and the second antenna port LB ANT2, and is configured to amplify the received low-frequency signal, so as to output the amplified low-frequency signal to the output port LNA OUT of the radio-frequency transceiver module 20.

Optionally, as shown in fig. 3, the radio frequency transceiver module 20 further includes:

the coupling unit 240 is connected to the gating unit 220 and the first antenna port LB ANT1, and is used for coupling the low-frequency signal in the radio frequency path between the gating unit 220 and the first antenna port LB ANT 1.

Specifically, the rf transceiver module 20 is further configured with a coupling output port CPLOUT, and the coupling unit 240 is connected to the gating unit 220, the first antenna port LB ANT1, and the coupling output port CPLOUT, respectively, to couple the low-frequency signal in the rf path between the gating unit 220 and the first antenna port LB ANT1, so as to output the coupling signal through the coupling output port CPLOUT. More specifically, the coupling unit 240 includes an input terminal, an output terminal, and a coupling terminal. The input terminal of the coupling unit 240 is coupled to the gating unit 220, the output terminal of the coupling unit 240 is coupled to the first antenna port LB ANT1, and the coupling terminal is coupled to the coupling output port CPLOUT. The coupling signal comprises a forward coupling signal and a reverse coupling signal, and the forward power information of the low-frequency band signal can be detected based on the forward coupling signal output by the coupling end; based on the reverse coupling signal output by the coupling end, the reverse power information of the low-frequency band signal can be correspondingly detected, and the detection mode is defined as a reverse power detection mode.

Optionally, as shown IN fig. 4, the rf transceiver module 20 may be further configured with an input port GSM LB IN, an input port GSM HB IN, and a high frequency output port GSM HB OUT. The rf transceiver module 20 further includes a 2G low frequency transmitting unit 250 and a 2G high frequency transmitting unit 260. The amplification processing of the 2G low frequency signal and the 2G high frequency signal can be realized by the 2G low frequency transmission unit 250 and the 2G high frequency transmission unit 260, respectively.

Further alternatively, as shown in fig. 5, the transmitting unit 210 includes: the input end of the power amplifier LB PA1 is connected with the input port PA IN; the first ends of the multichannel selector switch SP8T1 are connected to the output end of the power amplifier LB PA1, and the second ends of the multichannel selector switch SP8T1 are respectively connected to the first ends of the plurality of first filter modules 200 in one-to-one correspondence (for example, the two second ends of the multichannel selector switch SP8T1 are respectively connected to the first ends of the two first filter modules 200 in one-to-one correspondence). Specifically, when the frequency band of the low-frequency signal is a preset frequency band, the power amplifier LB PA1 and the first filtering module 200 can support the correlation processing of the frequency band signal, so as to correspondingly output the low-frequency signal without clutter; when the frequency band of the low-frequency signal is a plurality of preset frequency bands, the second ends of the multi-channel selector switch SP8T1 are respectively connected to the first ends of the plurality of first filter modules 200 in a one-to-one correspondence manner, so that the power amplifier LB PA1 and the first filter modules 200 can also support the correlation processing of the low-frequency signals of a plurality of different frequency bands, so as to correspondingly output the low-frequency signals of the frequency bands without clutter. It can be appreciated that the input port PA IN, the power amplifier LB PA1, the multi-channel selector switch SP8T1 and the plurality of first filter modules 200 of the rf transceiver module 20 form a filter path of the plurality of transmit paths, and the plurality of filter paths are independent from each other and do not overlap with each other. It should be noted that, when the transmitting unit 210 only needs to implement the transmission of the low-frequency signal in one frequency band, the number of the second ends of the multi-channel selector switch SP8T1 may be only one, and the number of the first filter modules 200 is correspondingly one.

Further alternatively, as shown in fig. 5, the receiving unit 230 includes:

the output end of the low noise amplifier LNA1 is connected with the output port LNA OUT of the radio frequency transceiver module 20; the first end of the multichannel selection switch SP4T1 is connected with the input end of the low-noise amplifier LNA1, the second end of a part of the multichannel selection switch SP4T1 is connected with the second end of the first filter module 200, and the multichannel selection switch SP4T1 is connected with the first antenna port LB ANT1 through the first filter module 200 to receive a low-frequency signal input by the first antenna port LB ANT 1; a part of the second terminals of the multi-channel selection switch SP4T1 is connected to the second antenna port LB ANT2 to receive the low frequency signal input from the second antenna port LB ANT 2.

The low-noise amplifier LNA1 and the multi-channel selector switch SP4T1 are integrated in the radio frequency transceiver module 20, the radio frequency channel between the low-noise amplifier LNA1 and the first antenna port LB ANT1 is selectively conducted through the multi-channel selector switch SP4T1, and the radio frequency channel between the low-noise amplifier LNA1 and the second antenna port LB ANT2 can also be selectively conducted, so that the low-noise amplification processing is selectively conducted on the 5G radio frequency signals in different frequency bands, the number of the low-noise amplifiers LNA1 is saved, and the area occupied by a main board by a device is reduced. When low-noise amplification processing is required for low-frequency signals in a plurality of frequency bands, a plurality of low-noise amplifiers (for example, two low-noise amplifiers LNA1 and LNA 2) may be provided.

Further alternatively, as shown in fig. 5, the number of output ports LNA OUT of the radio frequency transceiver module 20 is plural, and the number of low noise amplifiers LNA1 is plural; the receiving unit 230 further includes:

the double pole double throw switch DPDT1, a plurality of first ends of the double pole double throw switch DPDT1 are respectively connected with two output ports (output port LNA OUT1, output port LNA OUT 2) in a one-to-one correspondence manner, and each second end of the double pole double throw switch DPDT1 is respectively connected with the output ends of the low noise amplifier LNA1 and the low noise amplifier LNA2 in a one-to-one correspondence manner. The double pole double throw switch DPDT1 is used for selectively conducting the paths between two output ports (output port LNA OUT1, output port LNA OUT 2) and a plurality of low noise amplifiers LNA1 to realize the output paths of low frequency signals of different frequency bands.

Further alternatively, as shown in fig. 5, the gating unit 220 is a multi-channel selection switch SP8T2, and a plurality of first ends of the multi-channel selection switch SP8T2 are respectively connected with the second ends of the plurality of first filtering modules 200 in a one-to-one correspondence manner; the second terminal of the multi-channel selection switch SP8T2 is connected to the first antenna port LB ANT 1.

Further alternatively, as shown in fig. 5, the 2G low frequency transmitting unit 250 includes a power amplifier 2G LB PA and a filter F1; the 2G high frequency transmission unit 260 includes a power amplifier 2G HB PA and a filter F2. The input end of the power amplifier 2G LB PA is connected to the input port GSM LB IN, the output end of the power amplifier 2G LB PA is connected to the first end of the second gating unit 230 through the filter F1, the input end of the power amplifier 2G HB PA is connected to the input port GSM HB IN, and the output end of the power amplifier 2G HB PA is connected to the high frequency output port GSM HB OUT through the filter F2. The power amplifier 2G LB PA and the power amplifier 2G HB PA are used for amplifying the 2G low frequency signal and the 2G high frequency signal, respectively, and the filter F1 and the filter F2 are used for filtering the 2G low frequency signal and the 2G high frequency signal, respectively.

For convenience of explanation, the signal transceiving process of the rf transceiver module 20 in this embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

the transmitting process of the N28 low-frequency signal comprises the following steps: the radio frequency transceiver 10 outputs an N28 transmitting signal through the input port PA IN to enter the radio frequency transceiver module 20, amplifies the signal through the power amplifier LB PA of the transmitting unit 210, performs filtering processing through the multi-channel selection switch SP8T1 and the first filtering module 200, and outputs the signal to the first antenna port LB ANT1 through the gating unit 220 and the coupling unit 240, and finally reaches the antenna of the antenna group.

Main set receiving process of N28 low frequency signals: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency transceiver module 20 through the first antenna port LB ANT1, enter the first filter module 200 through the coupling unit 240 and the gating unit 220 to be filtered, enter the low-noise amplifier LNA1 through the multi-channel selector switch SP4T1 to be amplified, and reach the output port LNA OUT through the third switch to be output to the radio frequency transceiver 10.

Main set MIMO receiving process of N28 low frequency signals: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency transceiver module 20 through the second antenna port LB ANT2, enter the low-noise amplifier LNA1 through the multi-channel selector switch SP4T1 for amplification, reach the output port LNA OUT1 through the double-pole double-throw switch DPDT1 and are output to the radio frequency transceiver 10.

As shown in fig. 6, in one embodiment, the radio frequency transceiver module 20 is further configured with an auxiliary input port LB TXOU, an auxiliary output port lna_aux, and an auxiliary transceiver port lb_trx; wherein: two first ends of the first filtering module 40 are respectively connected with the auxiliary input port LB TXOU and the auxiliary output port LNA_AUX in a one-to-one correspondence manner, and a second end of the first filtering module 40 is connected with the auxiliary receiving and transmitting port. The low-frequency signal received and transmitted by the radio frequency transceiver module 20 can be filtered by the first filter module 40, and the isolation effect of the first filter module 40 on the low-frequency signal is improved. It should be noted that, in other embodiments, a plurality of first filtering modules 40 may be externally arranged to implement filtering processing on low-frequency signals of a plurality of different frequency bands.

Optionally, as shown in fig. 6, the radio frequency transceiver module 20 includes: a transmitting unit 210, a gating unit 220, a receiving unit 230.

The transmitting unit 210 is connected to the input port PA IN and the auxiliary input port LB TXOU, respectively, and is configured to amplify the low-frequency signal received by the input port PA IN.

The receiving unit 230 is connected to the output port LNA OUT, the auxiliary output port lna_aux, and the second antenna port LB ANT2, respectively, and amplifies the received low frequency signal.

The gating unit 220 is respectively connected to the transmitting unit 210, the receiving unit 230, the auxiliary transceiver port lb_trx, and the first antenna port LB ANT1, and is used for selectively switching on the radio frequency paths between the transmitting unit 210, the receiving unit 230 and the first antenna port LB ANT 1.

Optionally, as shown in fig. 6, the radio frequency transceiver module 20 further includes: the coupling unit 240 is connected to the gating unit 220 and the first antenna port LB ANT1, and is used for coupling the low-frequency signal in the radio frequency path between the gating unit 220 and the first antenna port LB ANT 1.

The transmitting unit 210, the receiving unit 230, the gating unit 220, and the coupling unit 240 are referred to the related descriptions of the above embodiments, and are not repeated here.

Alternatively, as shown in fig. 7, the low frequency signal includes a plurality of radio frequency signals of low frequency bands; the rf transceiver module 20 further includes:

the two first ends of the filtering unit 270 are respectively connected to the transmitting unit 210 and the receiving unit 230 in a one-to-one correspondence, and the second end of the filtering unit 270 is connected to the gating unit 220 for filtering stray waves except for low-frequency signals.

Wherein, the frequency band of the low frequency signal filtered by the filtering unit 270 is different from the frequency band of the low frequency signal filtered by the first filtering module 40. Specifically, a first filtering module 40 and one or more filtering units 270 may be provided, where the first filtering module 40 is configured to filter out low frequency signals in the primary frequency band, and the filtering unit 270 is configured to filter out low frequency signals in other secondary frequency bands. Taking the rf transceiver module 20 as an example, as shown in fig. 7, a first filtering module 40 and two filtering units 270 may be disposed to implement filtering processing of the low-frequency signals in three frequency bands by the first filtering module 40. Alternatively, the filtering unit 270 may be a duplexer or a filter.

Optionally, the rf transceiver module 20 may be further configured with an input port GSM LB IN, an input port GSM HB IN, and a high frequency output port GSM HB OUT. The rf transceiver module 20 further includes a 2G low frequency transmitting unit and a 2G high frequency transmitting unit. The description of the 2G low frequency transmitting unit and the 2G high frequency transmitting unit is referred to the above embodiments, and will not be repeated here.

Alternatively, as shown in fig. 8, a specific circuit structure diagram of the present embodiment is shown, and the related description of the circuit structure diagram is referred to the above embodiment and is not repeated herein. For convenience of explanation, the signal transceiving process of the rf transceiver module 20 in this embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

the transmitting process of the N28 low-frequency signal comprises the following steps: the radio frequency transceiver 10 outputs an N28 transmission signal through the input port PA IN to enter the radio frequency transceiver module 20, amplifies the signal through the power amplifier LB PA1 of the transmission unit 210, outputs the signal to the auxiliary input port LB TXOU through the multi-channel selection switch SP8T1 to reach the first filter module 40, and outputs the signal to the first antenna port LB ANT1 through the auxiliary transceiver port and the gating unit 220 after the first filter module 40 performs filtering processing, finally reaches the antenna of the antenna group.

Main set receiving process of N28 low frequency signals: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency transceiver module 20 through the first antenna port LB ANT1, enter the first filter module 40 through the coupling unit 240, the gating unit 220 and the auxiliary transceiver port to be filtered, enter the low-noise amplifier LNA1 through the auxiliary output port lna_aux and the multi-channel selection switch SP4T1 to be amplified, and reach the output port LNA OUT through the third switch to be output to the radio frequency transceiver 10.

Main set MIMO receiving process of N28 low frequency signals: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency transceiver module 20 through the second antenna port LB ANT2, enter the low-noise amplifier LNA1 through the multi-channel selector switch SP4T1 for amplification, reach the output port LNA OUT through the double-pole double-throw switch DPDT1 and are output to the radio frequency transceiver 10.

As shown in fig. 9, in one embodiment, the radio frequency receiving module 30 includes a first receiving module 310 and a second receiving module 320, where the first receiving module 310 is respectively connected to an output port of the radio frequency receiving module 30 and a third antenna port LB ANT3, and is used to support diversity reception of low frequency signals; the second receiving module 320 is connected to the output end of the rf receiving module 30 and the fourth antenna port LB ANT4, respectively, and is configured to support diversity MIMO receiving of the low frequency signal.

Optionally, the radio frequency receiving module 30 further includes a first gating module 330, where the first gating module 330 is respectively connected to the first receiving module 310, the second receiving module 320, and the third antenna port LB ANT3, and is used for selectively conducting radio frequency paths between the first receiving module 310, the second receiving module 320, and the third antenna port LB ANT 3. The first receiving module 310 may also be connected to the fourth antenna port LB ANT5 to connect antennas of the antenna group. Further alternatively, the first gating module 330 may be a multi-channel selection switch SP8T3.

Optionally, the radio frequency receiving module 30 further includes a second gating module 340, where the second gating module 340 is respectively connected to two output ports of the radio frequency receiving module 30, the first receiving module 310, and the second receiving module 320, and is used for selectively switching on a radio frequency path between the two output ports of the radio frequency receiving module 30 and the first receiving module 310 and the second receiving module 320. Further alternatively, the second gating module 340 may be a double pole double throw switch DPDT2.

Alternatively, as shown in fig. 10, the first receiving module 310 includes a low noise amplifier LAN3, a multi-channel selection switch SP4T3, a filter F3, and a filter F4, where an input end of the low noise amplifier LAN3 is connected to a first end of the multi-channel selection switch SP4T1, an output end of the low noise amplifier LAN3 is connected to the second gating module 340, a first end of the multi-channel selection switch SP4T1 is connected to the first end of the filter F3 and the first end of the filter F4, and a second end of the filter F3 and the second end of the filter F4 are connected to the first gating module 330. The second receiving module 320 includes a low noise amplifier LAN4, a multi-channel selection switch SP4T4, and a filter F6, where an input end of the low noise amplifier LAN4 is connected to a first end of the multi-channel selection switch SP4T4, an output end of the low noise amplifier LAN4 is connected to the second gating module 340, a first end of the multi-channel selection switch SP4T4 is connected to a first end of the filter F6, and a second end of the filter F6 is connected to the first gating module 330. The number of the filters F in the first receiving module 310 and the number of the filters F in the second receiving module 320 may be one or more. In other embodiments, the filter in the first receiving module 310 and the filter in the second receiving module 320 may also be disposed in a side of the rf receiving module 30 outside close to the antenna.

Optionally, as shown in fig. 11, the radio frequency receiving module 30 is further configured with a middle-high frequency antenna port MHB ANT, where the high frequency antenna port MHB ANT is used to connect with other antennas of the antenna group to support receiving of the middle-frequency signal and the high-frequency signal, so as to expand the frequency range of the radio frequency receiving module 30 for receiving the radio frequency signal, and improve the receiving frequency range of the radio frequency system. Specifically, the radio frequency receiving module 30 further includes a third receiving module 350, where the third receiving module 350 is configured to be connected to the MHB ANT, and the third receiving module 350 may include a multi-pole multi-throw switch nPnT, a low noise amplifier, a multi-channel selector switch, a filter F, and a multi-channel selector switch.

For convenience of explanation, the signal receiving process of the rf receiving module 30 in this embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

diversity reception process of N28 low frequency signal: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency receiving module 30 through the third antenna port LB ANT3, enter the filter of the first receiving module 310 through the first gating module 330 to be filtered, enter the low-noise amplifier LAN through the multi-channel selector switch SP4T3 to be amplified, reach the output port LNA OUT through the second gating module 340 and output to the radio frequency transceiver 10.

MIMO receiving process of N28 low frequency signal: the antennas of the antenna group receive the N28 low-frequency signals from the space, the N28 low-frequency signals enter the radio frequency receiving module 30 through the fourth antenna port LB ANT4, enter the low-noise amplifier LAN4 through the multi-channel selection switch SP4T1 of the second receiving module 320 for amplification, and reach the output port LNA OUT through the second gating module 340 to be output to the radio frequency transceiver 10.

As shown in fig. 12 (fig. 12 illustrates a structure in which the radio frequency transceiver module 20 is connected to the first antenna ANT1 and the radio frequency receiver module 30 is connected to the second antenna ANT 2), in one embodiment, the radio frequency system further includes:

the second filtering module 50 is connected to the second antenna port LB ANT2 and an antenna in the antenna group, and is configured to perform filtering processing on the received low-frequency signal.

The second filtering module 50 is configured to perform filtering processing on the received low frequency signal and selectively output a 5G low frequency signal of at least one frequency band to the second antenna port LB ANT2, and the radio frequency transceiver module 20 performs low noise amplification processing on the received low frequency signal through the second antenna port LB ANT2 and outputs the low frequency signal to the radio frequency transceiver 10. Optionally, the second filtering module 50 is a filter, an input end of the filter is connected to the antenna, and an output end of the filter is connected to the third antenna port LB ANT 3.

As shown in fig. 12, in one embodiment, the radio frequency system further includes:

the third filtering module 60 is connected to the fourth antenna port LB ANT4 and an antenna in the antenna group, and is configured to perform filtering processing on the received low-frequency signal.

The third filtering module 60 is configured to perform filtering processing on the received low-frequency signal, and selectively output a 5G low-frequency signal of at least one frequency band to the fourth antenna port LB ANT4, and the radio frequency receiving module 30 performs low-noise amplification processing on the received low-frequency signal through the fourth antenna port LB ANT4 and outputs the low-noise amplified signal to the radio frequency transceiver 10. Optionally, the third filtering module 60 is a filter, an input end of the filter is connected to the antenna, and an output end of the filter is connected to the fourth antenna port LB ANT 4.

As shown in fig. 13 (fig. 13 illustrates a structure in which the radio frequency transceiver module 20 is connected to the first antenna ANT1 and the radio frequency receiver module 30 is connected to the second antenna ANT 2), in one embodiment, the antenna efficiency of the antenna connected to the second antenna port LB ANT2 is lower than the antenna efficiency of the antenna connected to the first antenna port LB ANT1, and the radio frequency system further includes:

the output end of the first low noise amplification module 70 is connected to the second antenna port LB ANT2, and the input end of the first low noise amplification module 70 is connected to the second filtering module 50, so as to amplify the low frequency signal after the filtering process.

By arranging the first low noise amplification module 70 at a position outside the radio frequency transceiver module 20 and close to the antenna side, the receiving performance of the second antenna port LB ANT2 of the radio frequency transceiver module 20 can be improved, and the problems of low efficiency caused by environmental problems and large insertion loss caused by a noise amplification circuit far away from the inside of the radio frequency transceiver module 20 are avoided. Optionally, the first low noise amplification module 70 is a low noise amplifier, an input end of the low noise amplifier is connected to the second filtering module 50, and an output end of the low noise amplifier is connected to the second antenna port LB ANT 2.

As shown in fig. 13, in one embodiment, the antenna efficiency of the fourth antenna port LB ANT4 is lower than the antenna efficiency of the antenna connected to the third antenna port LB ANT3, and the radio frequency system further includes:

the output end of the second low noise amplification module 80 is connected to the fourth antenna port LB ANT4, and the input end port of the second low noise amplification module 80 is connected to the third filtering module 60, so as to amplify the low frequency signal after the filtering process.

By arranging the second low noise amplification module 80 at a position outside the rf receiving module 30 and close to the antenna side, the receiving performance of the fourth antenna port LB ANT4 of the rf transceiver module 20 can be improved, and the problems of low efficiency caused by environmental problems and large insertion loss caused by a noise amplification circuit far away from the inside of the rf receiving module 30 can be avoided. Optionally, the second low noise amplification module 80 is a low noise amplifier, an input end of the low noise amplifier is connected to the third filtering module 60, and an output end of the low noise amplifier is connected to the fourth antenna port LB ANT 4.

In one embodiment, the first antenna port LB ANT1 and the third antenna port LB ANT3 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2, as shown in fig. 14, and the radio frequency system further includes:

the first switching module 90 is connected to the first antenna port LB ANT1, the third antenna port LB ANT3, the first antenna ANT1 and the second antenna ANT2, and is configured to switchably connect the first antenna port LB ANT1 and the third antenna port LB ANT3 to the first antenna ANT1 and the second antenna ANT2.

Through setting up first switching module 90, can select to connect first antenna port LB ANT1, third antenna port LB ANT3 switchably first antenna ANT1 and second antenna ANT2, confirm the target antenna from first antenna ANT1 and second antenna ANT2 to control first switching module 90 makes the target antenna can carry out transmission and main album reception, thereby can distribute the uplink signal on antenna efficiency better first antenna ANT1 or second antenna ANT2, can guarantee the reliability of uplink signal in order to improve the communication performance of radio frequency system work.

Alternatively, as shown in fig. 15 and 16 (fig. 16 is an example of the embodiment of fig. 8, 10 and 12), the first switching module 90 may be a double pole double throw switch DPDT3, and two first ends of the first switching module 90 are respectively connected to the first antenna port LB ANT1 and the third antenna port LB ANT3 in a one-to-one correspondence manner, and two second ends of the first switching module 90 are respectively connected to the first antenna ANT1 and the second antenna ANT2 in a one-to-one correspondence manner.

In one embodiment, the first antenna port LB ANT1 and the third antenna port LB ANT3 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2, the first antenna port LB ANT1 includes a first switching port ANT101 and a second switching port ANT102, and the first switching port ANT101 and the second switching port ANT102 are configured to be connected to the first antenna ANT1 and the second antenna ANT2 in one-to-one correspondence, respectively; the radio frequency transceiver module 20 is further configured with a connection port CAX, and the connection port CAX is connected to the third antenna port LB ANT 3; as shown in fig. 17, the radio frequency transceiver module 20 further includes:

a transceiver module 201 connected to the second antenna port LB ANT2 for supporting amplification of the received low frequency signal; the second switching module 202 is connected to the transceiver module 201, the first switching port ANT101, the second switching port ANT102, and the connection port CAX, and is configured to switchably connect the transceiver module 201 and the connection port CAX to the first antenna ANT1 and the second antenna ANT2, and the connection port CAX is connected to the third antenna port LB ANT3.

By arranging the second switching module 202, the first antenna port LB ANT1 and the third antenna port LB ANT3 can be selectively and switchably connected with the first antenna ANT1 and the second antenna ANT2, the target antenna is determined from the first antenna ANT1 and the second antenna ANT2, and the second switching module 202 is controlled to enable the target antenna to transmit and receive the main set, so that uplink signals can be distributed on the first antenna ANT1 or the second antenna ANT2 with better antenna efficiency, and the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system.

Alternatively, as shown in fig. 18 and 19 (fig. 19 is an example of the embodiment of fig. 8, 10 and 12), the second switching module 202 is a double pole double throw switch DPDT4, where two first ends of the second switching module 202 are respectively connected to the first switching port ANT101 and the second switching port ANT102 in a one-to-one correspondence, and two second ends of the second switching module 202 are respectively connected to the transceiver module 201 and the connection port CAX in a one-to-one correspondence.

Optionally, the transceiver module 201 may include at least part of the transmitting unit 210, the receiving unit 230, the gating unit 220, the coupling unit 240, the filtering unit 270, and the like and the corresponding optional devices as shown in the above embodiments, and the relevant description is referred to the above embodiments and is not repeated herein.

In one embodiment, the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, as shown in fig. 20, and the radio frequency system further includes:

the third switching module 100 is connected to the first, second, third and fourth antenna ports LB ANT1, LB ANT2, LB ANT3 and LB ANT4, respectively, and configured to switchably connect the first, second, third and fourth antennas ANT1, ANT2, ANT3 and ANT4.

By providing the third switching module 100, the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 may be selectively configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, determine the target antenna from the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4, and control the third switching module 100 so that the target antenna can perform transmission and main set reception, thereby distributing uplink signals on antennas with better antenna efficiency, and ensuring reliability of the uplink signals to improve communication performance of the radio frequency system operation.

Alternatively, as shown in fig. 21 and 22 (fig. 22 is an example of the embodiment of fig. 8, 10 and 12), the third switching module 100 may be a four-pole four-throw switch 4P4T, and four first ends of the third switching module 100 are respectively connected to the first antenna port LB ANT1, the second antenna port LB ANT2, the third antenna port LB ANT3 and the fourth antenna port LB ANT4 in a one-to-one correspondence manner, and four second ends of the third switching module 100 are respectively connected to the antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4 in a one-to-one correspondence manner.

The embodiment of the application also provides a communication device, and the communication device is provided with the radio frequency system in any embodiment.

By arranging the radio frequency system on the communication equipment, 4 x 4MIMO reception can be realized, and the throughput of low-frequency signals can be improved by times under the condition of not increasing frequency spectrum resources and antenna transmitting power; the downloading rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned in weak signal environments such as cell edges, building depths, elevators and the like, the communication equipment is received through 4 x 4MIMO, so that the communication equipment has higher diversity gain and larger coverage distance; the device has high integration level, reduces the area of each device occupying the substrate in the radio frequency system, and can simplify the layout and wiring and save the cost.

As further illustrated in fig. 23, and as a communication device is illustrated as a mobile phone 11, in particular, as shown in fig. 23, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24, 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. 23 is not limiting of the handset and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. The various components shown in fig. 20 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.

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 the memory 21 include an operating system 211, a communication module (or instruction set) 212, a Global Positioning System (GPS) module (or instruction set) 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 various switches in the radio frequency system 24.

The I/O subsystem 26 couples input/output peripheral devices on the handset 11, such as keypads and other input control devices, to the peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of the handset 11 by supplying commands via the I/O subsystem 26, and may use the output resources of the I/O subsystem 26 to receive status information and other outputs from the handset 11. For example, a user may activate the handset or deactivate the handset by pressing button 261.

The radio frequency system 24 may be any of the radio frequency systems described in any of the previous embodiments.

In the description of the present specification, reference to the description of the terms "one embodiment," "optionally," and the like means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

wherein at least two of the first antenna port, the second antenna port, the third antenna port, and the fourth antenna port are configured to switchably connect at least two antennas of an antenna group, and the antennas connected by different ports are different; the at least two ports include the first antenna port;

the radio frequency transceiver module is also configured with an input port and an output port; the radio frequency system further comprises:

the first filter module is connected with the input port and the output port in a one-to-one correspondence manner, and the second end of the first filter module is connected with the first antenna port and is used for filtering stray waves except the low-frequency signals received and transmitted by the radio-frequency receiving and transmitting module;

the first filtering module is arranged outside the radio frequency receiving and transmitting module or integrated inside the radio frequency receiving and transmitting module; the first filtering module carries out filtering treatment on the low-frequency signal which is received by the input port and amplified by the radio frequency receiving and transmitting module, so as to output the low-frequency signal which is amplified and filtered to the first antenna port and output the low-frequency signal through the first antenna port; the first filtering module performs filtering processing on the low-frequency signal received by the first antenna port, and the low-frequency signal after the filtering processing is amplified by the radio frequency transceiver module and then output to the output port, so that the low-frequency signal is output to the radio frequency transceiver through the output port.

2. The radio frequency system of claim 1, wherein the antenna group comprises a first antenna, a second antenna, a third antenna, and a fourth antenna, wherein:

the first antenna port, the third antenna port configured to switchably connect the first antenna and the second antenna, the second antenna port configured to connect the third antenna, the fourth antenna port configured to connect the fourth antenna; or alternatively

The first, second, third and fourth antenna ports are configured to switchably connect the first, second, third and fourth antennas.

3. The radio frequency system of claim 2, wherein the first antenna port, the third antenna port are configured to switchably connect the first antenna and the second antenna, wherein:

the antenna efficiency of the first antenna and the second antenna is higher than that of the third antenna and the fourth antenna, wherein the radio frequency transceiver is configured to be connected to a target antenna of the first antenna port according to network information of the low-frequency signals received by the first antenna port and the third antenna port, and the target antenna is one of the first antenna and the second antenna.

4. The radio frequency system according to claim 3, wherein the first antenna is configured as a default target antenna for transmission and main set reception of the low frequency signal, and the second antenna is configured as the target antenna if a difference between a second signal strength of the low frequency signal received by the second antenna and a first signal strength of the low frequency signal received by the first antenna is greater than or equal to a preset threshold value within a preset time period.

5. The radio frequency system of any of claims 2-4, wherein the first antenna port, the third antenna port are configured to switchably connect the first antenna and the second antenna, the radio frequency system further comprising:

and the first switching module is respectively connected with the first antenna port, the third antenna port, the first antenna and the second antenna and is used for switchably connecting the first antenna port and the third antenna port with the first antenna and the second antenna.

6. The radio frequency system according to any one of claims 2-4, wherein the first antenna port and the third antenna port are configured to switchably connect the first antenna and the second antenna, the first antenna port including a first switching port and a second switching port, the first switching port and the second switching port being configured to connect the first antenna and the second antenna, respectively, in a one-to-one correspondence; the radio frequency transceiver module is further configured with a connection port, and the connection port is connected with the third antenna port; the radio frequency transceiver module further comprises:

The receiving and transmitting module is connected with the second antenna port and used for supporting amplification processing of the received low-frequency signals;

and the second switching module is respectively connected with the transceiver module, the first switching port, the second switching port and the connecting port and is used for switchably connecting the transceiver module and the connecting port with the first antenna and the second antenna.

7. The radio frequency system of claim 2, wherein the first antenna port, the second antenna port, the third antenna port, and the fourth antenna port are configured to switchably connect the first antenna, the second antenna, the third antenna, and the fourth antenna, wherein:

the radio frequency transceiver is configured to configure a target antenna connected to the first antenna port according to network information of the low frequency signals received by the first antenna port, the second antenna port, the third antenna port and the fourth antenna port, wherein the target antenna is one of the first antenna, the second antenna, the third antenna and the fourth antenna.

8. The radio frequency system according to claim 7, wherein the first antenna is configured as a default target antenna for transmission and main set reception of the low frequency signal, and the second antenna is configured as the target antenna if a difference between a second signal strength of the low frequency signal received by the second antenna and a third signal strength of the low frequency signal received by any one of the first antenna, the third antenna, and the fourth antenna is greater than or equal to a preset threshold value within a preset time period.

9. The radio frequency system according to claim 2 or 7 or 8, wherein the first antenna port, the second antenna port, the third antenna port, and the fourth antenna port are configured to switchably connect the first antenna, the second antenna, the third antenna, and the fourth antenna, the radio frequency system further comprising:

and a third switching module connected with the first antenna port, the second antenna port, the third antenna port, the fourth antenna port, the first antenna, the second antenna, the third antenna and the fourth antenna, respectively, and configured to switchably connect the first antenna, the second antenna port, the third antenna port and the fourth antenna port.

10. The radio frequency system of claim 1, wherein the radio frequency transceiver module is further configured with an auxiliary input port, an auxiliary output port, an auxiliary transceiver port; wherein:

the two first ends of the first filtering module are respectively connected with the auxiliary input port and the auxiliary output port in a one-to-one correspondence manner, and the second end of the first filtering module is connected with the auxiliary receiving and transmitting port.

11. The radio frequency system of claim 10, wherein the radio frequency transceiver module comprises:

the transmitting unit is respectively connected with the input port and the auxiliary input port and is used for amplifying the low-frequency signals received by the input port;

the receiving unit is respectively connected with the output port, the auxiliary output port and the second antenna port and is used for amplifying the received low-frequency signals;

and the gating unit is respectively connected with the transmitting unit, the receiving unit, the auxiliary receiving and transmitting port and the first antenna port and is used for selectively conducting radio frequency paths between the transmitting unit, the receiving unit and the first antenna port.

12. The radio frequency system according to claim 11, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the radio frequency transceiver module further comprises:

the two first ends of the filtering unit are respectively connected with the transmitting unit and the receiving unit in a one-to-one correspondence manner, and the second end of the filtering unit is connected with the gating unit and is used for filtering stray waves except the low-frequency signals;

The frequency band of the low-frequency signal subjected to filtering processing by the filtering unit is different from the frequency band of the low-frequency signal subjected to filtering processing by the first filtering module.

13. The radio frequency system of claim 1, wherein the first filter module is integrated within the radio frequency transceiver module, the radio frequency transceiver module further comprising:

the transmitting unit is connected with the input port and is used for amplifying the low-frequency signal received by the input port;

the receiving unit is respectively connected with the output port, the first antenna port and the second antenna port and is used for amplifying the received low-frequency signals;

the gating unit is respectively connected with the transmitting unit, the receiving unit and the first antenna port and is used for selectively conducting radio frequency paths between the transmitting unit and the first antenna port and between the receiving unit and the first antenna port;

the two first ends of the first filtering module are respectively connected with the transmitting unit and the receiving unit in a one-to-one correspondence mode, and the second end of the first filtering module is connected with the gating unit.

14. The radio frequency system according to claim 13, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; wherein:

The number of the first filtering modules is multiple, two first ends of each first filtering module are respectively connected with the transmitting unit and the receiving unit in a one-to-one correspondence mode, a second end of each first filtering module is connected with the gating unit, and frequency bands of low-frequency signals output by each first filtering module are different.

15. The radio frequency system of claim 1, further comprising:

and the second filtering module is respectively connected with the second antenna port and an antenna in the antenna group and is used for filtering the received low-frequency signal.

16. The radio frequency system of claim 15, wherein the antenna connected to the second antenna port has a lower antenna efficiency than the antenna connected to the first antenna port, the radio frequency system further comprising:

the output end of the first low-noise amplifying module is connected with the second antenna port, and the input end of the first low-noise amplifying module is connected with the second filtering module and is used for amplifying the low-frequency signals after filtering.

17. The radio frequency system of claim 1, further comprising:

And the third filtering module is respectively connected with the fourth antenna port and an antenna in the antenna group and is used for filtering the received low-frequency signal.

18. The radio frequency system of claim 17, wherein the antenna connected to the fourth antenna port has a lower antenna efficiency than the antenna connected to the third antenna port, the radio frequency system further comprising:

the output end of the second low-noise amplification module is connected with the fourth antenna port, and the input end of the second low-noise amplification module is connected with the third filtering module and is used for amplifying the low-frequency signals after filtering.

19. A communication device comprising a radio frequency system as claimed in any one of claims 1-18.