CN218217357U

CN218217357U - Radio frequency system and communication equipment

Info

Publication number: CN218217357U
Application number: CN202222158473.7U
Authority: CN
Inventors: 王国龙
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-01-03
Anticipated expiration: 2032-08-15

Abstract

The application relates to a radio frequency system and communication equipment, which comprise a radio frequency transceiver, a transmitting circuit, a first receiving circuit and a radio frequency front-end device. The radio frequency front-end device is respectively used for being connected with the radio frequency transceiver, the transmitting circuit, the first receiving circuit, the first antenna and the second antenna, and is used for gating a transmitting path between the transmitting circuit and the first antenna to realize one path of low-frequency signal transmission of the radio frequency system, gating a receiving path between the first receiving circuit and the first antenna to realize one path of low-frequency signal reception of the radio frequency system, and outputting a low-frequency signal input by the radio frequency transceiver to the second antenna after power amplification of the low-frequency signal to realize the other path of low-frequency signal transmission of the radio frequency system; the first receiving circuit is also used for being connected with the second antenna so as to realize the other path of low-frequency signal receiving of the radio frequency system, so that the number of external hanging devices of the system can be reduced on the basis of realizing the functions of two-path transmitting and two-path receiving, and the packaging cost can be reduced while the area of a main board is reduced.

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 of radio frequency technology, a radio frequency system with a two-way low-frequency signal transmission function is more and more emphasized because the transmission performance of low-frequency signals can be improved, however, the current radio frequency system with a two-way low-frequency signal transmission function usually occupies a large area of a single board, and thus the cost is inevitably increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a radio frequency system and communication equipment, which can reduce the area of a main board and reduce the packaging cost.

A first aspect of the present application provides a radio frequency system, comprising:

a radio frequency transceiver;

the transmitting circuit is connected with the radio frequency transceiver and is used for supporting the transmitting processing of the low-frequency signals;

the first receiving circuit is connected with the radio frequency transceiver and is used for supporting receiving processing of the low-frequency signal;

the radio frequency front-end device is respectively used for being connected with the radio frequency transceiver, the transmitting circuit, the first receiving circuit, the first antenna and the second antenna, and is used for gating a transmitting path between the transmitting circuit and the first antenna, gating a receiving path between the first receiving circuit and the first antenna, amplifying the power of a low-frequency signal input by the radio frequency transceiver and outputting the low-frequency signal to the second antenna; wherein the first receiving circuit is further configured to be connected to the second antenna.

A second aspect of the application provides a communication device comprising a radio frequency system as described above.

The radio frequency system and the communication equipment comprise a radio frequency transceiver, a transmitting circuit, a first receiving circuit and a radio frequency front-end device, wherein the transmitting circuit is connected with the radio frequency transceiver and is used for supporting the transmitting processing of low-frequency signals; the first receiving circuit is connected with the radio frequency transceiver and used for supporting receiving processing of low-frequency signals; the radio frequency front-end device is respectively used for being connected with the radio frequency transceiver, the transmitting circuit, the first receiving circuit, the first antenna and the second antenna, and is used for gating a transmitting path between the transmitting circuit and the first antenna to realize one path of low-frequency signal transmission of the radio frequency system, gating a receiving path between the first receiving circuit and the first antenna to realize one path of low-frequency signal reception of the radio frequency system, and outputting a low-frequency signal input by the radio frequency transceiver to the second antenna after power amplification of the low-frequency signal to realize the other path of low-frequency signal transmission of the radio frequency system; the first receiving circuit is also used for being connected with the second antenna so as to receive the other path of low-frequency signals of the radio frequency system. According to the radio frequency system, the radio frequency front-end device with the gating function and the transmitting function, the transmitting circuit and the first receiving circuit are in common cooperation, the number of the external devices of the system can be reduced on the basis of achieving the double-path transmitting function and the double-path receiving function, the integration level of the system is improved, the area of a main board is reduced, and meanwhile the packaging cost can be reduced. Moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

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 an RF front-end device;

fig. 5 is a second block diagram illustrating the structure of an rf front-end device according to an embodiment;

fig. 6 is a third block diagram illustrating a structure of an rf front-end device according to an embodiment;

FIG. 7 is a block diagram of an RF front-end device according to an embodiment;

FIG. 8 is a block diagram of an exemplary RF system;

FIG. 9 is a fifth block diagram illustrating the structure of an RF front-end device according to an embodiment;

FIG. 10 is a sixth block diagram illustrating the architecture of an RF front-end device according to an embodiment;

FIG. 11 is a block diagram of an embodiment of a radio frequency system;

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

FIG. 13 is a seventh block diagram illustrating the structure of a radio frequency system according to an embodiment;

FIG. 14 is an eighth block diagram illustrating the architecture of an RF system according to an exemplary embodiment;

FIG. 15 is a ninth block diagram illustrating the architecture of an RF system according to one embodiment;

FIG. 16 is a block diagram showing the structure of an RF system according to an embodiment;

FIG. 17 is an eleventh block diagram illustrating an exemplary RF system;

fig. 18 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 and not restrictive on the broad 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 explicitly specified 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 with 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 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: the radio frequency transceiver 10, the transmitting circuit 20, the first receiving circuit 40, the radio frequency front end device 30 and the first receiving circuit 40.

A transmitting circuit 20 connected to the radio frequency transceiver 10 for supporting a transmitting process of the low frequency signal; a first receiving circuit 40, connected to the radio frequency transceiver 10, for supporting a receiving process of the low frequency signal; the radio frequency front end device 30 is respectively used for being connected with the radio frequency transceiver 10, the transmitting circuit 20, the first receiving circuit 40, the first antenna ANT1 and the second antenna ANT2, and is used for gating a transmitting path between the transmitting circuit 20 and the first antenna ANT1, gating a receiving path between the first receiving circuit 40 and the first antenna ANT1, and performing power amplification on a low-frequency signal input by the radio frequency transceiver 10 and then outputting the low-frequency signal to the second antenna ANT2; the first receiving circuit 40 is further configured to be connected to the second antenna ANT2 (the first receiving circuit 40 may be connected to the second antenna ANT2 through the rf front-end device 30, and may also be connected to the second antenna ANT2 through other manners, and fig. 1 illustrates only that the first receiving circuit 40 is connected to the second antenna ANT2 through the rf front-end device 30, and only shows one output terminal of the first receiving circuit 40, which is only an illustration and not a limitation).

The input end of the transmitting circuit 20 is connected to the radio frequency transceiver 10, and the transmitting circuit 20 is configured to perform power amplification processing on a low frequency signal input by the radio frequency transceiver 10 and then output the low frequency signal, so as to support transmission processing of the low frequency signal. The low-frequency signal may be a radio frequency signal in any low-frequency band of a 4G LTE signal and a 5G NR signal, which is understood as a low-frequency signal in a preset frequency band, for example, the low-frequency signal in the preset frequency band may be a radio frequency signal in an N28 frequency band. Optionally, the transmitting circuit 20 may also support power amplification processing of low frequency signals, intermediate frequency signals, and high frequency signals of a plurality of different frequency bands. Alternatively, the transmitting circuit 20 may be a multi-mode multi-band Power Amplifier (MMPA).

The output end of the first receiving circuit 40 is connected to the radio frequency transceiver 10, the input end of the first receiving circuit 40 is connected to the radio frequency front-end device 30 and the second antenna ANT2, and the first receiving circuit 40 is configured to perform low-noise power amplification on an input low-frequency signal and output the low-frequency signal to the radio frequency transceiver 10 to support receiving of the low-frequency signal. Specifically, the low frequency signals input by the first receiving circuit 40 include low frequency signals from the first antenna ANT1 and low frequency signals from the second antenna ANT2, so that the first receiving circuit 40 can implement a two-way receiving function, for example, a dominant set receiving function for the low frequency signals of the first antenna ANT1 and a dominant set MIMO receiving function for the low frequency signals of the second antenna ANT2. Alternatively, the first receiving circuit 40 may be an External Low Noise Amplifier (ela) integrating a plurality of Low Noise amplifiers and a plurality of radio frequency switches.

The rf front-end device 30 is an integrated device having a low-frequency signal transmitting function and a transmitting path receiving path gating function, and the rf front-end device 30 is configured with a plurality of ports, which are respectively used for connecting with the rf transceiver 10, the transmitting circuit 20, the first receiving circuit 40, the first antenna ANT1, and the second antenna ANT2. The rf front-end device 30 is configured to gate a transmit path between the transmit circuit 20 and the first antenna ANT1, so that the low-frequency signal transmitted by the transmit circuit 20 can be finally transmitted to the first antenna ANT1; the radio frequency front end device 30 is also used to gate a receiving path between the first receiving circuit 40 and the first antenna ANT1 to enable a low frequency signal from the first antenna ANT1 to be transmitted to the first receiving circuit 40; the rf front-end device 30 is further configured to perform power amplification on a low-frequency signal input by the rf transceiver 10 and output the low-frequency signal to the second antenna ANT2, so that the rf front-end device 30 implements a transmitting function of the low-frequency signal, and meanwhile, the rf front-end device is combined with the transmitting circuit 20 and the first receiving circuit 40, so that the rf system can implement a dual-path transmitting function and a dual-path receiving function. Alternatively, the rf Front-End device 30 may be a TXM (TX Module) device Integrated with a power amplifier or a Femid device (Front-End-Module with Integrated multiplexer) Integrated with a power amplifier. The power amplifier for performing power amplification processing on the low-frequency signal is integrated in the radio frequency front-end device 30, so that the radio frequency front-end device 30 has a power amplification processing function on the basis of having a gating function, the integration level of the radio frequency system can be improved, and further, the radio frequency system only needs to be packaged once, so that the cost is reduced.

The first antenna ANT1 and the second antenna ANT2 may support transceiving of radio frequency signals, and the radio frequency signals may include low, medium, and high frequency signals of a 4G network and a 5G network. The first antenna ANT1 and the second antenna ANT2 may be formed by using any suitable type of antenna, different types of antennas may be used for different frequency bands and frequency band combinations, and the type of the antenna is not further limited in this embodiment of the application.

The radio frequency system provided by the embodiment includes a radio frequency transceiver 10, a transmitting circuit 20, a first receiving circuit 40, and a radio frequency front end device 30, wherein the transmitting circuit 20 is connected to the radio frequency transceiver 10 for supporting a transmission process of a low frequency signal; the first receiving circuit 40 is connected to the radio frequency transceiver 10, and is configured to support a receiving process of a low frequency signal; the radio frequency front-end device 30 is respectively used for being connected with the radio frequency transceiver 10, the transmitting circuit 20, the first receiving circuit 40, the first antenna ANT1 and the second antenna ANT2, and is used for gating a transmitting path between the transmitting circuit 20 and the first antenna ANT1 to realize one path of low-frequency signal transmission of the radio frequency system, gating a receiving path between the first receiving circuit 40 and the first antenna ANT1 to realize one path of low-frequency signal reception of the radio frequency system, and performing power amplification on a low-frequency signal input by the radio frequency transceiver 10 and then outputting the low-frequency signal to the second antenna ANT2 to realize the other path of low-frequency signal transmission of the radio frequency system; the first receiving circuit 40 is further configured to be connected to the second antenna ANT2, so as to receive another low-frequency signal of the radio frequency system. According to the radio frequency system provided by the embodiment of the application, through the common cooperation of the radio frequency front-end device 30 with the gating function and the transmitting function, the transmitting circuit 20 and the first receiving circuit 40, the number of external devices of the system can be reduced on the basis of realizing the double-path transmitting function and the double-path receiving function, the integration level of the system is improved, and the packaging cost can be reduced while the area of a main board is reduced. Moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

Fig. 2 is a second block diagram of the rf system according to an embodiment, and referring to fig. 2, in this embodiment, the rf front-end device 30 includes: a power amplification module 310 and a switching module 320.

The input end of the power amplification module 310 is connected to the radio frequency transceiver 10, the output end of the power amplification module 310 is used for being connected to the second antenna ANT2, and the power amplification module 310 is used for performing power amplification processing on a low-frequency signal input by the radio frequency transceiver 10. Specifically, the input end of the power amplification module 310 is configured to receive a low-frequency signal input by the radio frequency transceiver 10, and the output end of the power amplification module 310 is configured to be connected to the second antenna ANT2 to output the low-frequency signal after power amplification, so that the power amplification module 310 and the transmission circuit cooperate together to implement a dual-path transmission function of the radio frequency system.

The first end of the switch module 320 is connected to the transmitting circuit 20 and the first receiving circuit 40, the second end of the switch module 320 is connected to the first antenna ANT1, and the switch module 320 is configured to gate a transmitting path between the transmitting circuit 20 and the first antenna ANT1 and gate a receiving path between the first receiving circuit 40 and the first antenna ANT1. Specifically, the first end of the switch module 320 is connected to the transmitting circuit 20 and the first receiving circuit 40, respectively, when the switch module 320 gates the transmitting path, the switch module 320 may transmit the low-frequency signal after the transmitting process by the transmitting circuit 20, and when the switch module 320 gates the receiving path, the switch module 320 may transmit the low-frequency signal of the same frequency band from the first antenna ANT1 to the first receiving circuit 40.

In the rf front-end device 30 of the present embodiment, the power amplification module 310 for performing power amplification processing on the low-frequency signal, and the switch module 320 for gating the receiving path and the transmitting path are integrated in the rf front-end device 30, so that the integration level of the rf system can be improved, and further, only one packaging is required to reduce the cost.

Optionally, please refer to fig. 2, in this embodiment, the radio frequency system further includes:

two first ends of the first filtering module 330 are respectively connected to the output end of the power amplifying module 310 and the first receiving circuit 40, a second end of the first filtering module 330 is used for being connected to the second antenna ANT2, and the first filtering module 330 is used for filtering an input low-frequency signal.

Specifically, the first filtering module 330 is configured to perform filtering processing on an input low-frequency signal in a preset frequency band to filter signals other than the low-frequency signal in the frequency band, and output only the low-frequency signal in the preset frequency band; meanwhile, the first filtering module 330 may also isolate signals of the rf front-end device 30 and the first receiving circuit 40, for example, separate the transceiving paths of the low-frequency signals of the preset frequency band according to the signal direction of the preset low-frequency signals to achieve the isolation effect.

two first ends of the second filtering module 340 are connected to the transmitting circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, a second end of the second filtering module 340 is connected to a first end of the switch module 320, and the second filtering module 340 is configured to filter the input low-frequency signal.

Specifically, the second filtering module 340 is configured to perform filtering processing on an input low-frequency signal in a preset frequency band to filter signals other than the low-frequency signal in the frequency band, and output only the low-frequency signal in the preset frequency band; meanwhile, the second filtering module 340 may also isolate signals of the transmitting circuit 20 and the first receiving circuit 40, for example, separate the transceiving paths of the low frequency signals of the preset frequency band according to the signal direction of the preset low frequency signals to achieve the isolation effect.

Optionally, the first filtering module 330 and the second filtering module 340 may be duplexers or filters, and when the low-frequency signal is a radio-frequency signal in a single low-frequency band, for example, an N28-band signal, the first filtering module 330 and the second filtering module 340 are respectively one, and may both filter stray waves outside the N28-band and only output the N28-band signal; when the low-frequency signal is a radio-frequency signal of a plurality of low-frequency bands, a plurality of second filtering modules 340 may be respectively arranged, or the second filtering modules 340 respectively include a plurality of duplexers or filters, so as to respectively perform filtering processing on each low-frequency signal.

Fig. 3 is a third structural block diagram of a radio frequency system according to an embodiment, referring to fig. 3, in this embodiment, the first receiving circuit 40 is further configured to support a receiving process of low frequency signals of a plurality of different frequency bands, and the transmitting circuit 20 is further configured to support a receiving process of low frequency signals of a plurality of different frequency bands.

The number of the second filtering modules 340 is multiple, two first ends of each second filtering module 340 are respectively connected with the first receiving circuit 40 and the transmitting circuit 20 in a one-to-one correspondence manner, a second end of each second filtering module 340 is connected with a first end of the switch module 320, each second filtering module 340 is configured to filter a low-frequency signal of a target, and the low-frequency signal of the target is one of low-frequency signals of multiple different frequency bands.

Optionally, the number of the second filtering modules 340 is the same as the number of the low frequency signals of the plurality of different frequency bands. For example, when the plurality of low frequency signals include radio frequency signals of three low frequency bands N26, N8, and N28, the number of the second filtering modules 340 is three, and the three second filtering modules 340 may respectively and correspondingly output the radio frequency signals of the three low frequency bands N26, N8, and N28. Specifically, when the number of the second filtering modules 340 is multiple, the number of the first terminals of the switch modules 320 is also multiple, and the second terminal of each second filtering module 340 is connected to a first terminal of the corresponding switch module 320. The switch module 320 may be, for example, a single-pole multi-throw SPnT switch, where n is equal to or greater than the number of second filtering modules 340.

Fig. 4 is a block diagram of a configuration of an rf front-end device according to an embodiment, as shown in fig. 4, in this embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, and a transceiver port (transceiver port TRX 0-transceiver port TRX13 is shown). The first antenna port LB ANT1 is configured to be connected to the second end of the switch module 320 and the first antenna ANT1, respectively, the first input port LB RFIN is connected to the input ends of the radio frequency transceiver 10 and the power amplification module 310, respectively, and the transceiving port is connected to the first end of the switch module 320 and the second end of the second filtering module 340, respectively. The second antenna port LB ANT2 is connected to the output end of the power amplifying module 310 and a first end of the first filtering module 330, respectively.

Therefore, the power amplification module 310 is integrated in the rf front-end device 30, and the rf front-end device 30 can be understood as a TXM device integrated with the power amplification module 310, so that the occupied area of the plug-in power amplification module 310 can be reduced, the integration level can be improved, and the purposes of reducing cost, reducing area and improving performance can be achieved.

Fig. 5 is a second block diagram of the configuration of the rf front-end device according to an embodiment, as shown in fig. 5, in this embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, and a transceiving port (a transceiving port TRX0-TRX 13 is shown in the figure), the first antenna port LB ANT1 is configured to be connected to the second end of the switch module 320 and the first antenna ANT1, respectively, the first input port LB RFIN is connected to the input ends of the rf transceiver 10 and the power amplification module 310, the transceiving port is connected to the first end of the switch module 320 and the second end of the second filter module 340, respectively, the second antenna port LB ANT2 is configured to be connected to the second end of the second antenna ANT2 and the second end of the first filter module 330, respectively, the rf front-end device 30 is further configured with a first output port LB, the first output port RX is configured to be connected to the other first receiving circuit 40 and the first end of the first filter module 330, respectively.

Therefore, the power amplification module 310 and the first filtering module 330 are integrated in the rf front-end device 30, and the rf front-end device 30 can be understood as a TXM device integrated with the power amplification module 310 and the first filtering module 330, so that the occupied area of the external power amplifier and the first filtering module 330 can be further reduced, the integration level is improved, and the purposes of reducing cost, reducing area and improving performance are achieved.

Optionally, with continuing to refer to fig. 4-5, the rf front-end device 30 is further configured to support filtering processing and transmitting processing on the 2G high frequency signal and the 2G low frequency signal, and the rf front-end device 30 is further configured with 2G high frequency signal input terminals 2G HB IN and 2G low frequency signal input ports 2G LB IN. The rf front-end device 30 further includes a 2G middle and high frequency signal amplifying and filtering module 350 and a 2G low frequency signal amplifying and filtering module 360 shown in fig. 4-5.

Fig. 6 is a third structural block diagram of the rf front-end device according to an embodiment, as shown in fig. 6, in this embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, a second input port (any TX port shown in the figure), and a second output port (any RX port shown in the figure), the first antenna port LB ANT1 is configured to be connected to the second end of the switch module 320 and the first antenna ANT1, respectively, the first input port LB RFIN is connected to the inputs of the rf transceiver 10 and the power amplification module 310, the second input port is connected to one first end of the transmitting circuit 20 and the second filtering module 340, respectively, and the second output port is connected to the other first end of the first receiving circuit 40 and the second filtering module 340, respectively; the second antenna port LB ANT2 is connected to the output end of the power amplifying module 310 and a first end of the first filtering module 330, respectively.

Therefore, the power amplification module 310 and the second filtering module 340 are integrated in the rf front-end device 30, and the rf front-end device 30 can be understood as a Femid device integrated with the power amplification module 310, which can reduce the occupied area of the plug-in power amplification module 310, improve the integration level, and achieve the purposes of reducing the cost, reducing the area, and improving the performance.

Fig. 7 is a fourth structural block diagram of the rf front-end device according to an embodiment, as shown in fig. 7, in this embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, a second input port (any TX port shown in the figure), and a second output port (any RX port shown in the figure), the first antenna port LB ANT1 is configured to be connected to the second end of the switch module 320 and the first antenna ANT1, respectively, the first input port LB RFIN is connected to the input ends of the rf transceiver 10 and the power amplification module 310, the second input port is connected to the first ends of the transmitting circuit 20 and the second filter module 340, respectively, and the second output port is connected to the other first ends of the first receiving circuit 40 and the second filter module 340, respectively; the second antenna port LB ANT2 is used for connecting the second ends of the second antenna ANT2 and the first filtering module 330, respectively, and the rf front-end device 30 is further configured with a first output port LB RX, which is connected to the first receiving circuit 40 and the other first end of the first filtering module 330, respectively.

Therefore, the power amplification module 310, the second filtering module 340 and the first filtering module 330 are integrated in the rf front-end device 30, and the rf front-end device 30 can be understood as a Femid device integrated with the power amplification module 310 and the first filtering module 330, so as to further reduce the occupied area of the plug-in power amplification module 310, improve the integration level, and achieve the purposes of reducing the cost, reducing the area and improving the performance.

Optionally, with continuing to refer to fig. 6-7, the rf front-end device 30 is further configured with a medium-high frequency antenna port MHB ANT, a plurality of input ports and output ports (including the input port GSM HB, the input port B2 TX, the output port B2 RX, etc.) for transmitting medium-high frequency signals, the rf front-end device 30 further includes a medium-high frequency switch module 370 and a medium-high frequency filter module 380, and the specific connection relationship and function of the medium-high frequency switch module 370 and the medium-high frequency filter module 380 are similar to those of the switch module 320 and the second filter module 340, which is not further limited herein, and the rf front-end device 30 can implement gating of the transmit path and the receive path of the medium-high frequency signals through the coordination of the medium-high frequency switch module 370 and the medium-high frequency filter module 380.

Fig. 8 is a fourth structural block diagram of the rf system according to an embodiment, referring to fig. 8, in this embodiment, a second end of the first filtering module 330 is connected to another first end of the switch module 320, another second end of the switch module 320 is connected to the second antenna ANT2, and the switch module 320 is further configured to gate an rf path between the first filtering module 330 and the first target antenna and gate an rf path between the second filtering module 340 and the second target antenna; the first target antenna includes one of the first antenna ANT1 and the second antenna ANT2, and the second target antenna includes the other of the first antenna ANT1 and the second antenna ANT2.

A second end of the second filtering module 340 is connected to a first end of the switch module 320, a second end of the first filtering module 330 is connected to another first end of the switch module 320, a second end of the switch module 320 is connected to the first antenna ANT1, and another second end of the switch module 320 is connected to the second antenna ANT2. The switch module 320 is used for gating the rf path between the first filtering module 330 and the first target antenna, and is also used for gating the rf path between the first filtering module 330 and the first target antenna and gating the rf path between the second filtering module 340 and the second target antenna. The first target antenna includes one of the first antenna ANT1 and the second antenna ANT2, and the second target antenna includes the other of the first antenna ANT1 and the second antenna ANT2.

When the rf path between the first filtering module 330 and the first target antenna is gated, the rf path may transmit the low frequency signal amplified by the power amplifying module 310 and filtered by the first filtering module 330 to the first target antenna, and transmit the low frequency signal from the first target antenna to the first filtering module 330 for filtering. When the rf path between the second filtering module 340 and the second target antenna is gated, the rf path may transmit the low frequency signal amplified by the transmitting circuit 20 and filtered by the second filtering module 340 to the second target antenna, and transmit the low frequency signal from the second target antenna to the second filtering module 340 for filtering.

The first filtering module 330 is switchably connected to the first antenna ANT1 and the second antenna ANT2 through the switching module 320, and the second filtering module 340 is switchably connected to the first antenna ANT1 and the second antenna ANT2 through the switching module 320. Therefore, ports with different receiving functions of the first receiving circuit 40, for example, a port with a master set receiving function and a port with a master set MIMO receiving function, can be switchably connected to the first antenna ANT1 and the second antenna ANT2, so that antenna switching can be performed according to receiving efficiency of the first antenna ANT1 and the second antenna ANT2, an antenna with better performance is selected for master set receiving, and radio frequency performance of a radio frequency system is improved.

Fig. 9 is a fifth structural block diagram of the rf front-end device according to an embodiment, and referring to fig. 9, in the embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, a first output port LB RX, and a transceiver port (such as TRX0-TRX12 shown in the figure), the first antenna port LB ANT1 is configured to be connected to a second end of the switch module 320 and the first antenna ANT1, respectively, the second antenna port LB ANT2 is configured to be connected to another second end of the switch module 320 and the second antenna ANT2, respectively, the first input port RFIN is connected to the input terminals of the rf transceiver 10 and the power amplification module 310, the first output port LB RX is connected to the first receiving circuit 40 and a first end of the first filtering module 330, respectively, and the transceiver port is connected to a first end of the switch module 320 and a second end of the second filtering module 340, respectively.

Therefore, the power amplification module 310 and the first filtering module 330 are both integrated in the rf front-end device 30, and the rf path between the first filtering module 330 and the second antenna port LB ANT2 is integrated in the switch module 320, which can further improve the integration level of the rf front-end device 30 and further achieve the purposes of reducing cost, reducing area and improving performance, compared with fig. 4 and 5.

Fig. 10 is a sixth block diagram of the rf front-end device according to an embodiment, referring to fig. 10, in this embodiment, the rf front-end device 30 is configured with a first antenna port LB ANT1, a second antenna port LB ANT2, a first input port LB RFIN, a first output port LB RX, a second input port (e.g., a B2 TX port in the figure), and a second output port (e.g., a B2 RX port in the figure), the first antenna port LB ANT1 is configured to be connected to a second end of the switch module 320 and the first antenna ANT1, respectively, the second antenna port LB ANT2 is configured to be connected to another second end of the switch module 320 and the second antenna ANT2, the first input port LB RFIN is connected to the rf transceiver 10 and the input end of the power amplification module 310, the first LB RX is connected to a first receiving circuit 40 and a first end of the first filtering module 330, the second input port is connected to a first end of the transmitting circuit 20 and a first end of the second filtering module 340, and the second input port LB RFIN is connected to another first end of the first receiving circuit 340.

Therefore, the power amplification module 310, the second filtering module 340 and the first filtering module 330 are all integrated in the rf front-end device 30, and the rf path between the first filtering module 330 and the second antenna port LB ANT2 is integrated in the switch module 320, which can further improve the integration level of the rf front-end device 30 and further achieve the purpose of reducing cost, area and performance compared to fig. 6 and 7.

Fig. 11 is a fifth structural block diagram of the radio frequency system according to an embodiment, and referring to fig. 11, in this embodiment, the radio frequency system further includes:

the second receiving circuit 50 is connected to the rf transceiver 10, the third antenna, and the fourth antenna, respectively, and is configured to support receiving processing of a low frequency signal received by the third antenna and supporting receiving processing of a low frequency signal received by the fourth antenna.

The second receiving circuit 50 may be configured to perform filtering and amplifying processing on the low-frequency signal received by the third antenna to support receiving processing, such as diversity receiving processing, on the low-frequency signal received by the third antenna; and performing filtering amplification processing on the low-frequency signal received by the fourth antenna to support reception processing, such as diversity MIMO reception processing, on the low-frequency signal received by the fourth antenna. Therefore, the second receiving circuit 50 may support a diversity technology for low frequency signals and a dual-path receiving function for diversity MIMO reception, and the second receiving circuit 50 cooperates with the first receiving circuit 40, the first antenna ANT1, the second antenna ANT2, the third antenna, and the fourth antenna to implement four paths of receiving processing for preset low frequency signals, thereby supporting a 4 x 4MIMO receiving function for preset low frequency signals. For example, if the low-frequency signal is an N28 band signal, the radio frequency system may support dual transmission of the N28 band signal and a downlink 4 x 4mimo receiving function. Alternatively, the second receiving circuit 50 may be an External Low Noise Amplifier (ela) integrating a plurality of Low Noise amplifiers and a plurality of radio frequency switches.

The third antenna and the fourth antenna can both support the transceiving of radio frequency signals, and the radio frequency signals can include low, medium and high frequency signals of a 4G network and a 5G network. The third antenna and the fourth antenna may be formed by using any suitable type of antenna, and different types of antennas may be used for different frequency bands and frequency band combinations.

Fig. 12-17 are block diagrams illustrating structures of radio frequency systems according to various embodiments, and referring to fig. 12-17, in the above embodiments, the transmitting circuit 20 is used to support power amplification processing for low-frequency signals and also used to support power amplification processing for middle-high frequency signals. The transmission circuit 20 may include a first power amplifying unit 210, a second power amplifying unit 220, and a third power amplifying unit 230. Each power amplification unit may include a power amplifier and a radio frequency switch. The first power amplifying unit 210 is configured to support power amplification processing on a plurality of low-frequency signals, and may selectively output a signal of any low-frequency band after the power amplification processing. The second power amplifying unit 220 is configured to support power amplification processing on the intermediate frequency signal, and selectively output a signal of any intermediate frequency band after the power amplification processing; the third power amplifying unit 230 is configured to support power amplification processing on the high-frequency signal, and may selectively output a signal of any amplified high-frequency band.

With continuing to refer to fig. 12-17, in the above embodiment, the first receiving circuit 40 may include a plurality of first low noise amplifying units 410, and each of the first low noise amplifying units 410 is connected to a first end of a second filtering module 340, and is configured to perform filtering processing on the low frequency signal after filtering processing by the correspondingly connected second filtering module 340. Each first low noise amplifying unit 410 may include a low noise amplifier and a radio frequency switch, and the radio frequency switch may be configured to turn on a radio frequency path between the low noise amplifier connected thereto and each filtering unit or filtering module. Alternatively, the first receiving circuit 40 may support a low-noise amplification process of the received middle and high frequency signals. Specifically, the first receiving circuit 40 further includes a second low noise amplifying unit 420 and a third low noise amplifier 430. The second low-noise amplification unit 420 is configured to perform low-noise amplification processing on the input medium-low frequency signal to support reception processing of the medium-low frequency signal. The third lna 430 is configured to perform low noise amplification processing on the input intermediate frequency and high frequency signals to support reception processing of preset intermediate frequency and high frequency signals.

With continuing to refer to fig. 12-17, in the present embodiment, the second receiving circuit 50 may include a plurality of fourth low noise amplifying units 510, and each of the fourth low noise amplifying units 510 is configured to perform a low noise amplifying process on the received low frequency signal. Each fourth lna unit 510 may include a lna and a rf switch, and the rf switch may be used to connect the rf path between the lna connected thereto and each filtering unit or filtering module. Alternatively, the first receiving circuit 40 may support a low-noise amplification process of the received medium and high frequency signals. Specifically, the second receiving circuit 50 further includes a fifth low noise amplification unit 520 and a sixth low noise amplifier 530. The fifth low-noise amplification unit 520 is configured to perform low-noise amplification processing on the middle-high frequency signal to support reception processing of the middle-high frequency signal. The sixth low noise amplifier 530 is configured to perform a low noise amplification process on the preset high frequency signal to support a reception process on the preset high frequency signal.

Optionally, the second receiving circuit 50 further includes a third filtering module 540 and a fourth filtering module 550, a first end of the third filtering module 540 is connected to a fourth low noise amplifying unit 510, a second end of the third filtering module 540 is connected to a third antenna, a first end of the fourth filtering module 550 is connected to another fourth low noise amplifying unit 510, and a second end of the fourth filtering module 550 is connected to a fourth antenna. Specifically, the third filtering module 540 and the fourth filtering module 550 are respectively configured to filter the input low-frequency signal in the preset frequency band to filter out signals other than the low-frequency signal in the frequency band, and only output the low-frequency signal in the preset frequency band. The third filtering module 540 and the fourth filtering module 550 may be duplexers or filters.

Optionally, the second receiving circuit 50 further comprises a front-end module as in fig. 15-17. Optionally, the number of the third filtering modules may be multiple, and part of the third filtering modules is externally arranged on the front-end module and part of the third filtering modules is internally arranged in the front-end module. The front end module is respectively connected to the second receiving circuit 50, the external third filtering module 540, and the third antenna, and is configured to transmit the low-frequency signal from the third antenna to the external third filtering module 540, or filter the low-frequency signal from the third antenna through the internal third filtering module 540.

Optionally, the front-end module is configured with a low frequency antenna port LB ANT and a plurality of low frequency output ports RX. Wherein the low frequency antenna port LB ANT is configured to connect the third antenna ANT3, and the low frequency output port RX is configured to connect the second receiving circuit 50. The front-end module may include a first rf unit 560 and a plurality of built-in third filtering modules. Alternatively, the radio frequency unit may be an SP6T switch. Alternatively, the Front-end module may be a FEM (Front-end Modules) device.

Optionally, the front end module may also be configured with a medium high frequency antenna port MHB ANT and a plurality of second medium high frequency output ports. Wherein the medium-high frequency antenna port MHB ANT is configured to be connectable to the second receiving circuit 50, the medium-high frequency antenna port MHB ANT is configured to be available for connecting the third antenna ANT3. Specifically, as shown, the front-end module 520 further includes a second rf switch 570 and a plurality of fifth filtering modules 580. Each fifth filtering module is used for performing medium-high frequency filtering processing on the received signal so as to output medium-frequency signals or high-frequency signals of different frequency bands. The fifth filtering module 580 may include a high frequency filter or a band pass filter, among others. The number of the fifth filtering modules 580 may be set according to the number of frequency segments of the middle and high frequency signal. The second rf switch 570 may be an SP8T switch.

It should be noted that, in the above embodiment, the radio frequency system may further include a coupling circuit, which includes a coupler and a radio frequency switch (SPDT, DPDT #1, DPDT # 2), and is configured to couple the radio frequency signal (low frequency signal, intermediate frequency signal, or high frequency signal) on the radio frequency path to detect the power information of the radio frequency signal. The coupling circuit may output a coupling signal to the rf transceiver 10 via the coupling feedback terminal FBRX. Specifically, the coupling signal includes a forward coupling signal and a backward coupling signal, and forward power information of the low-frequency signal can be detected based on the forward coupling signal; based on the reverse coupling signal, reverse power information of the low frequency signal can be correspondingly detected.

Based on the rf systems shown in fig. 12-14, the working principle is illustrated by taking the low frequency signal as an N28 frequency band signal as an example:

the transmission link TX1:

the transmitting signal is output from a port TXOA0 LB0 of the radio frequency transceiver 10, enters a low frequency power amplifier LB PA in the first power amplifying unit 210 through a radio frequency line to a port LB1RFIN of the transmitting circuit 20, is amplified by the low frequency power amplifier, and is output to a port LB3 through an SP5T #2 switch; the signal is transmitted to the second filtering module 340 through the Path03, after filtering, is transmitted to the second input port AUX6 of the rf front-end device 30 through the Path02, and the single port is switched by the switch module 320 to the first antenna port LB ANT1; via Path01 to the first antenna ANT1.

The transmission link TX2:

the transmitting signal is output from the port TXOA0 LB1 of the rf transceiver 10 to the first input port LB RFIN of the rf front-end device 30 via the rf line; as shown in fig. 12 and 13, the amplified signal is amplified by the power amplification module 310 and then transmitted to the second antenna port LB ANT2; via Path06, to the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal passes through Path05 to reach the second antenna ANT2; as shown in fig. 14, after being amplified by the power amplifying module 310, the amplified signals pass through the first filtering module 330 to the switch module 320, the switch module 320 includes a switch DP16T, and the switch DP16T is switched to the second antenna port LB ANT2 and passes through the Path05 to the second antenna ANT2.

The primary set receives the PRX link:

a receiving signal is input from the first antenna ANT1, passes through a Path01, reaches the radio frequency front end device 30, is switched to the contact 10 by the switch module 320, and passes through a Path02, and reaches the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal is transmitted to the port LB0 IN0 of the first receiving circuit 40 through the Path 04; the switch SP3T #3 in the first receiving circuit 40 switches the single port to the LB0 LNA path of the first low noise amplifying unit; after being amplified by the first low-noise amplifying unit, the amplified signal is output to a port LB0 OUT of the first receiving circuit 40 through a switch MUX 2; the received signal enters the rf transceiver 10 through the port RXP LB LNA01 of the rf transceiver 10.

Diversity reception DRX link:

a received signal is input from a third antenna ANT3, transmitted to a third filtering module through a Path08, and filtered by the third filtering module to a port LB1 IN2 of the second receiving circuit 50; the switch SP4T inside the second receiving circuit 50 switches the single port to the LB1 LNA path; after being amplified by the low noise amplifier LB1 LNA, the signals are output to the port LB1 OUT through the switch MUX1, and the received signals enter the rf transceiver 10 through the port RXD LB LNA02 of the rf transceiver 10.

Primary set PRX MIMO link:

a received signal enters from the second antenna ANT2, passes through the Path05, and reaches the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal passes through Path07 to the first receiving circuit 40; enters through a port LB1 IN0 of the first receiving circuit 40 to a switch SP4T inside the first receiving circuit 40; the switch SP4T switches the single port to the low noise amplifier LB1 LNA; after being amplified by the low-noise amplifier LB1 LNA, the low-noise amplifier LB1 LNA is output to a port LB1 OUT through a switch MUX 1; the received signal enters the rf transceiver 10 through the port RXP LB LNA02 of the rf transceiver 10.

Diversity DRX MIMO link

A received signal enters from a fourth antenna ANT4 and passes through a Path09 Path to a fourth filtering module; after filtering, the fourth filtering module sends the filtered signal to the second receiving circuit 50; an internal switch SP3T #3 entering the second receiving circuit 50 through a port LB0 IN1 of the second receiving circuit 50; the switch SP3T #3 switches the single port to an LB0 LNA access; after being amplified by a low noise amplifier LB0 LNA, the low noise amplifier is connected to a port LB0 OUT through a switch MUX 2; the received signal enters the rf transceiver 10 through the port RXD LB LNA01 of the rf transceiver 10.

FBRX-Link of the Transmission Link TX1

When the forward power is detected, a contact 1 of a switch DPDT #1 in the coupling circuit is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when the reverse power is detected, a contact 1 of a switch DPDT #1 is tangent to a contact 4, and a contact 3 is tangent to a contact 2; through Path10, to switch SPDT; the switch SPDT is tangential to the single port and the FBRX signal enters the if transceiver 10 via the Path12 Path.

FBRX-Link of the Transmission Link TX2

When forward power is detected, in DPDT #2, a contact 1 is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when reverse power is detected, in DPDT #2, contact 1 is tangent to contact 4, and contact 3 is tangent to contact 2; through Path11, to switch SPDT; the switch SPDT is tangential to the single port and the FBRX signal enters the if transceiver 10 via Path 12.

Based on the rf system shown in fig. 15-17, the working principle is illustrated by taking the low frequency signal as an N28 frequency band signal as an example:

the transmission link TX1:

the transmitting signal is output from a port TXOA0 LB0 of the radio frequency transceiver 10, enters a low frequency power amplifier LB PA in the first power amplifying unit 210 through a port LB1RFIN of the radio frequency line to the transmitting circuit 20, is amplified by the low frequency power amplifier, and is output to a port LB3 through an SP5T #2 switch; the first input port AUX6 of the rf front-end device 30 is connected to the second filtering module 340 through the Path03, and after filtering, the second input port AUX6 is connected to the first antenna port LB ANT1 through the Path02, and the single port is switched by the switch module 320; via Path01 to the first antenna ANT1.

Transmit link TX2:

the transmitting signal is output from the rf transceiver 10TXOA0 LB1 port, and is sent to the first input port LB RFIN of the rf front-end device 30 through the rf line; as shown in fig. 15, the signal is amplified by the power amplifying module 310 to the second antenna port LB ANT2; via Path07, to the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal passes through Path05 to reach the second antenna ANT2; as shown in fig. 16 and 17, the amplified signal is sent to the first filtering module 330 by the power amplifying module 310, and the filtered signal is sent to the second antenna port LB ANT2 by the first filtering module 330, and sent to the second antenna ANT2 by the Path 05.

The primary set receives the PRX link:

a received signal is input from the first antenna ANT1, passes through a Path01, reaches the radio frequency front end device 30, is switched to the contact 4 by the switch module 320, and passes through a Path02 to reach the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal is routed to the port LB1 IN3 of the first receiving circuit 40 through the path 04; the SP4T switch in the first receiving circuit 40 switches the single port to the LB1 LNA path of the first low noise amplifying unit; after being amplified by the first low-noise amplifying unit, the amplified signal is output to a port LB1 OUT of the first receiving circuit 40 through a switch MUX 1; the received signal enters the rf transceiver 10 through the port RXP LB LNA02 of the rf transceiver 10.

Diversity reception DRX link:

a reception signal is input from the third antenna ANT3 and transmitted to the port LB ANT of the front-end module of the second reception circuit 50 via the Path 08; a switch SP6T inside the front-end module is switched to the contact 3, passes through the third filtering module and reaches a port LB1 IN1 of the second receiving circuit 50; the switch SP4T inside the second receiving circuit 50 switches the single port to the LB1 LNA path;

after being amplified by the low noise amplifier LB1 LNA, the amplified signal is output to a port LB1 OUT of the second receiving circuit 50 through a switch MUX 1; the received signal enters the rf transceiver 10 through the port RXD LB LNA02 of the rf transceiver 10.

Primary set PRX MIMO link:

a received signal enters from the second antenna ANT2, passes through the Path05, and reaches the first filtering module 330; after being filtered by the first filtering module 330, the filtered signal passes through Path06 to the first receiving circuit 40; enters through a port LB0 IN2 of the first receiving circuit 40 to a switch SP3T #3 inside the first receiving circuit 40; the switch SP3T #3 switches a single port to the low noise amplifier LB0 LNA; after being amplified by the low noise amplifier LB0 LNA, the low noise amplifier LB0 LNA is output to a port LB0 OUT through a switch MUX 2; the received signal enters the rf transceiver 10 through the port RXP LB LNA01 of the rf transceiver 10.

Diversity DRX MIMO link

A received signal enters from a fourth antenna ANT4 and passes through a Path09 Path to a fourth filtering module; the fourth filtering module filters the signal and sends the filtered signal to the second receiving circuit 50; an internal switch SP3T #3 entering the second receiving circuit 50 through a port LB0 IN2 of the second receiving circuit 50; the switch SP3T #3 switches the single port to an LB0 LNA access; after being amplified by a low noise amplifier LB0 LNA, the low noise amplifier is connected to a port LB0 OUT through a switch MUX 2; the received signal enters the rf transceiver 10 through the port RXD LB LNA01 of the rf transceiver 10.

FBRX-Link of a Transmission Link TX1

When the forward power is detected, a contact 1 of a switch DPDT #1 in the coupling circuit is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when the reverse power is detected, a contact 1 of a switch DPDT #1 is tangent to a contact 4, and a contact 3 is tangent to a contact 2; through Path10, to switch SPDT; the switch SPDT is tangential to the single port and the FBRX signal enters the if transceiver 10 via Path 12.

FBRX-Link of Transmit Link TX2

When the forward power is detected, in DPDT #2, contact 1 is tangent to contact 2, contact 3 is tangent to contact 4; when the reverse power is detected, in the DPDT #2, the contact 1 is tangent to the contact 4, and the contact 3 is tangent to the contact 2; through Path11, to switch SPDT; the switch SPDT is tangential to the single port and the FBRX signal enters the if transceiver 10 via Path 12.

The application also provides a communication device, which comprises the radio frequency system in the embodiment, the communication device can reduce the number of external devices of the system on the basis of realizing the functions of double-path transmission and double-path reception, improve the integration level of the system, and reduce the packaging cost while reducing the area of a mainboard. Moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

As shown in fig. 18, further, the above communication device is a mobile phone 11 for example, and specifically, as shown in fig. 18, 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. It will be understood by those skilled in the art that the handset 11 shown in figure 18 is not intended to be limiting and may include more or fewer components than shown, or some of the components may be combined, or a different arrangement of components. The various components shown in fig. 18 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, communication circuitry (or a set of instructions) 212, global Positioning System (GPS) circuitry (or a 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 modules, audio codec chips, application specific integrated circuits, etc.

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 a cell 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).

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure 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 shall be subject to the appended claims.

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

2. The radio frequency system of claim 1, wherein the radio frequency front end device comprises:

the input end of the power amplification module is connected with the radio frequency transceiver, the output end of the power amplification module is used for being connected with the second antenna, and the power amplification module is used for performing power amplification processing on the low-frequency signal input by the radio frequency transceiver;

the first end of the switch module is respectively connected with the transmitting circuit and the first receiving circuit, the second end of the switch module is connected with the first antenna, and the switch module is used for gating the transmitting path between the transmitting circuit and the first antenna and gating the receiving path between the first receiving circuit and the first antenna.

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

the two first ends of the first filtering module are respectively connected with the output end of the power amplification module and the first receiving circuit, the second end of the first filtering module is used for being connected with the second antenna, and the first filtering module is used for filtering the input low-frequency signal.

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

and two first ends of the second filtering module are respectively connected with the transmitting circuit and the first receiving circuit in a one-to-one correspondence manner, a second end of the second filtering module is connected with a first end of the switch module, and the second filtering module is used for filtering the input low-frequency signal.

5. The RF system according to claim 4, wherein the RF front-end device is configured with a first antenna port for connecting to the second terminal of the switch module and the first antenna, a second antenna port for connecting to the input of the RF transceiver and the power amplification module, a first input port for connecting to the first terminal of the switch module and the second terminal of the second filtering module, and a transceiving port for connecting to the first terminal of the switch module and the second terminal of the second filtering module;

the second antenna port is respectively connected with the output end of the power amplification module and a first end of the first filtering module; or the second antenna port is respectively configured to be connected to the second antenna and the second end of the first filtering module, and the radio frequency front-end device is further configured with a first output port, where the first output port is respectively connected to the first receiving circuit and another first end of the first filtering module.

6. The RF system according to claim 4, wherein the RF front-end device is configured with a first antenna port, a second antenna port, a first input port, a second input port, and a second output port, the first antenna port is used for being connected to the second end of the switch module and the first antenna, the first input port is connected to the input ends of the RF transceiver and the power amplification module, the second input port is connected to the first ends of the transmitting circuit and the second filtering module, and the second output port is connected to the other first ends of the first receiving circuit and the second filtering module;

the second antenna port is respectively connected with the output end of the power amplification module and a first end of the first filtering module; or the second antenna port is used for connecting the second antenna and the second end of the first filtering module, respectively, and the radio frequency front-end device is further configured with a first output port, which is connected with the first receiving circuit and the other first end of the first filtering module, respectively.

7. The RF system according to claim 4, wherein the second terminal of the first filtering module is connected to the first terminal of the switch module, the second terminal of the switch module is connected to the second antenna, and the switch module is further configured to gate the RF path between the first filtering module and the first target antenna and gate the RF path between the second filtering module and the second target antenna;

wherein the first target antenna comprises one of the first antenna and the second antenna, and the second target antenna comprises the other of the first antenna and the second antenna.

8. The RF system according to claim 7, wherein the RF front-end device is configured with a first antenna port for connecting to a second terminal of the switch module and the first antenna, a second antenna port for connecting to the second terminal of the switch module and the second antenna, a first input port for connecting to the input terminals of the RF transceiver and the power amplification module, a first output port for connecting to the first receiving circuit and a first terminal of the first filtering module, and a transceiving port for connecting to a first terminal of the switch module and a second terminal of the second filtering module.

9. The radio frequency system according to claim 7, wherein the radio frequency front end device is configured with a first antenna port, a second antenna port, a first input port, a first output port, a second input port, and a second output port, the first antenna port is configured to be connected to a second end of the switch module and the first antenna, respectively, the second antenna port is configured to be connected to another second end of the switch module and the second antenna, respectively, the first input port is connected to the inputs of the radio frequency transceiver and the power amplification module, the first output port is connected to the first receiving circuit and a first end of the first filtering module, respectively, the second input port is connected to a first end of the transmitting circuit and the second filtering module, respectively, and the second output port is connected to another first end of the first receiving circuit and the second filtering module, respectively.

10. The radio frequency system according to any of claims 4-9, wherein the first receiving circuit is further configured to support receive processing of low frequency signals of a plurality of different frequency bands, and the transmitting circuit is further configured to support receive processing of low frequency signals of a plurality of different frequency bands;

the number of the second filtering modules is multiple, two first ends of each of the second filtering modules are respectively connected with the first receiving circuit and the transmitting circuit in a one-to-one correspondence manner, a second end of each of the second filtering modules is connected with one first end of the switch module, each of the second filtering modules is used for filtering a low-frequency signal of a target, and the low-frequency signal of the target is one of the low-frequency signals of multiple different frequency bands.

11. The radio frequency system according to any one of claims 1 to 9, further comprising:

and the second receiving circuit is respectively connected with the radio frequency transceiver, the third antenna and the fourth antenna and is used for supporting the receiving processing of the low-frequency signals received by the third antenna and supporting the receiving processing of the low-frequency signals received by the fourth antenna.

12. A communication device, characterized in that it comprises a radio frequency system according to any one of claims 1-11.