CN217282934U

CN217282934U - Radio frequency front end module and system

Info

Publication number: CN217282934U
Application number: CN202221276021.2U
Authority: CN
Inventors: 盛潮云
Original assignee: Wuhan Memsonics Technologies Co Ltd
Current assignee: Wuhan Memsonics Technologies Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-23
Anticipated expiration: 2032-05-20

Abstract

The application provides a pair of radio frequency front end module, system relates to communication technology field. The radio frequency front end module comprises: multiunit radio frequency channel, antenna switch, wherein, every group radio frequency channel includes: the first end of the radio frequency processing circuit of each frequency band is used for being connected with a corresponding radio frequency interface on a radio frequency transceiver, the second ends of the radio frequency processing circuits of the frequency bands are connected with a plurality of connecting ends on the first side of an antenna switch, and the connecting ends on the second side of the antenna switch are respectively used for being connected with a plurality of antenna units in an antenna module. Therefore, through the connection relation between the plurality of groups of radio frequency channels and the antenna switch, the port switching function of the radio frequency front-end module is expanded, the structural complexity of the radio frequency front-end module is reduced, and the cost of the radio frequency front-end module is reduced.

Description

Radio frequency front end module and system

Technical Field

The utility model relates to the field of communication technology, particularly, relate to a radio frequency front end module, system.

Background

As mobile communication enters the 5G NR era, 3 frequency bands are newly added in the frequency ranges of 5G and 6G, including n77 (3300-.

From the perspective of the number of transmit-receive antennas, there are mainly 3 types of rf front-end schemes in the prior art: 1T2R, 1T4R, and 2T4R, where T represents a transmitting antenna and corresponding circuitry, and R represents a receiving antenna and corresponding circuitry. For a wireless terminal supporting 5G NR, the 1T2R scheme is applied to a low frequency range (less than 960MHz, such as B5/8); the 1T4R scheme is mainly used for medium frequency (1700 + 2180MHz), high frequency (2300 + 2690MHz) and new frequency band (n 77/78/79); the 2T4R approach is used primarily for n 41/77/78/79. The design complexity of the radio frequency front-end module and the circuit is increased by the radio frequency scheme combining the existing frequency band (namely the replating frequency band) and the newly added frequency band.

The existing scheme is complex, needs more devices, increases the cost and the size of the circuit, and can not realize the mutual switching between any ports. Therefore, a highly integrated rf front end module is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radio frequency front end module, system to the not enough among the above-mentioned prior art to solve among the prior art scheme more complicated, the unable free switching scheduling problem of port.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides a radio frequency front end module, where the radio frequency front end module includes: multiunit radio frequency channel, antenna switch, wherein, every group radio frequency channel includes: the radio frequency processing circuit of a plurality of frequency channels, the radio frequency processing circuit's of every frequency channel first end is used for connecting the radio frequency interface that corresponds on the radio frequency transceiver, the radio frequency processing circuit's of a plurality of frequency channels second end is all connected a plurality of links of first side in the antenna switch, a plurality of links of second side are used for connecting a plurality of antenna element in the antenna module respectively in the antenna switch.

Optionally, the plurality of sets of radio frequency channels includes: a plurality of radio frequency transceiving channels, wherein each radio frequency transceiving channel comprises: the receiving and transmitting processing circuit, the multi-band combiner and the coupler of the multiple frequency bands;

the first end of the transceiving processing circuit of each frequency band is used for connecting a transmitting interface and a receiving interface of the corresponding frequency band on the radio frequency transceiver, the second ends of the transceiving processing circuits of the multiple frequency bands are connected with the first ends corresponding to the multiple frequency bands in the multi-frequency band combiner, the second ends of the multi-frequency band combiner are connected with the first target connecting end of the first side on the antenna switch through the coupler, and the first target connecting end is the connecting end corresponding to the transceiving antenna unit in the antenna module.

Optionally, the transceiver processing circuit in a first frequency band of the multiple frequency bands includes: a power amplifier, a low noise amplifier, and a switch;

the input end of the power amplifier is used for connecting a transmitting interface of the first frequency band in the radio frequency transceiver, the output end of the power amplifier is connected with the first end of the switch, the output end of the low noise amplifier is used for connecting a receiving interface of the first frequency band in the radio frequency transceiver, the input end of the low noise amplifier is connected with the second end of the switch, and the third end of the switch is connected with a connecting end corresponding to the first frequency band on the multi-frequency band combiner.

Optionally, a band-pass filter corresponding to the first frequency band is integrated in the multi-band combiner.

Optionally, the transceiver processing circuit of a second frequency band of the multiple frequency bands includes: the device comprises a power amplifier, a low noise amplifier, a plurality of duplexers, a plurality of transmitting filters, a plurality of receiving filters, a single-band combiner, a first switch, a second switch and a third switch;

the input end of the power amplifier is used for connecting a transmitting interface of the second frequency band in the radio frequency transceiver, the output end of the power amplifier is connected with one end of the first switch, and a plurality of other ends of the first switch are respectively connected with one connecting end of the third switch on the first side through the plurality of transmitting filters;

the output end of the low-noise amplifier is used for connecting a receiving interface of the second frequency band in the radio frequency transceiver, the input end of the low-noise amplifier is connected with one end of the second switch, and a plurality of other ends of the second switch are respectively connected with a plurality of connecting ends of the third switch on the first side through the plurality of receiving filters;

the two connecting ends of the third switch on the second side are respectively connected with the two connecting ends on the first side of the single-frequency band combiner, and the connecting end on the second side of the single-frequency band combiner is connected with the connecting end corresponding to the second frequency band on the multi-frequency band combiner.

Optionally, a low-pass filter corresponding to the second frequency band is integrated in the multi-band combiner.

Optionally, the plurality of sets of radio frequency channels includes: a plurality of radio frequency receive channels, wherein each radio frequency receive channel comprises: a multi-frequency band receiving and processing circuit and a multi-frequency band combiner;

the first end of the receiving processing circuit of each frequency band is used for being connected with a receiving interface of the corresponding frequency band on the radio frequency transceiver, the second ends of the receiving processing circuits of the multiple frequency bands are connected with the first ends corresponding to the multiple frequency bands in the multi-frequency band combiner, the second ends of the multi-frequency band combiner are connected with the second target connecting end of the first side on the antenna switch, and the second target connecting end is a connecting end corresponding to a receiving antenna unit in the antenna module.

Optionally, the receiving and processing circuit of a first frequency band of the multiple frequency bands includes: a low noise amplifier;

the output end of the low-noise amplifier is used for connecting with the receiving interface of the first frequency band in the radio frequency transceiver, and the input end of the low-noise amplifier is connected with the first end corresponding to the first frequency band in the multi-band combiner.

Optionally, the receiving and processing circuit of a second frequency band of the multiple frequency bands includes: the low noise amplifier, the plurality of receiving filters, the single-band combiner, the first switch and the second switch;

the output end of the low-noise amplifier is used for connecting a receiving interface of the second frequency band in the radio frequency transceiver, the input end of the low-noise amplifier is connected with one end of the first switch, and a plurality of other ends of the first switch are respectively connected with a plurality of connecting ends of the second switch on the first side through the plurality of receiving filters;

the two connecting ends of the second switch on the second side are respectively connected with the two connecting ends of the first side of the single-frequency band combiner, and the connecting end of the single-frequency band combiner on the second side is connected with the connecting end of the multi-frequency band combiner corresponding to the second frequency band.

In a second aspect, an embodiment of the present application provides a radio frequency system, including: the radio frequency front end module, the radio frequency transceiver, and the antenna module of any of the above first aspects;

the radio frequency front-end module is provided with a plurality of radio frequency interfaces, a plurality of radio frequency processing circuits and an antenna switch, wherein the radio frequency interfaces on the radio frequency transceiver are respectively connected with the radio frequency processing circuits of a plurality of frequency bands in each group of radio frequency channels in the radio frequency front-end module, and the antenna switch in the radio frequency front-end module is connected with a plurality of antenna units in the antenna module.

Compared with the prior art, the method has the following beneficial effects:

the embodiment of the present application provides a radio frequency front end module, system, this radio frequency front end module includes: multiunit radio frequency channel, antenna switch, wherein, every group radio frequency channel includes: the first end of the radio frequency processing circuit of each frequency band is used for being connected with a corresponding radio frequency interface on a radio frequency transceiver, the second ends of the radio frequency processing circuits of the frequency bands are connected with a plurality of connecting ends on the first side of an antenna switch, and the connecting ends on the second side of the antenna switch are respectively used for being connected with a plurality of antenna units in an antenna module. Therefore, the port switching function of the radio frequency front-end module is expanded through the connection relation between the plurality of groups of radio frequency channels and the antenna switch, the structural complexity of the radio frequency front-end module is reduced, and the cost of the radio frequency front-end module is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a radio frequency front end module according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a radio frequency transceiving channel according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a transceiving processing circuit according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another transceiving processing circuit according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a radio frequency receiving channel according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a receiving processing circuit according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another receiving processing circuit according to an embodiment of the present disclosure;

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

fig. 9 is a schematic structural diagram of a 2T4R rf front end module according to an embodiment of the present application.

Icon: 100-radio frequency front end module, 200-radio frequency transceiver, 300-antenna module, 110-radio frequency channel, 120-antenna switch, 111-transceiving processing circuit, 112-multiband combiner, 113-coupler, 114-power amplifier, 115-low noise amplifier, 116-switch, 117-duplexer, 118-transmitting filter, 119-receiving filter, 121-single-band combiner, 122-first switch, 123-second switch, 124-third switch and 125-receiving processing circuit.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are only used to distinguish one description from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

In order to improve the integration level of the radio frequency front end module, the application provides the radio frequency front end module and the system, and the cost of the radio frequency front end module is reduced while the integration level of the radio frequency front end module is improved. A radio frequency front end module provided in the embodiments of the present application is explained by specific examples as follows.

Fig. 1 is a schematic structural diagram of a radio frequency front end module according to an embodiment of the present disclosure. As shown in fig. 1, the rf front-end module includes: multiple sets of radio frequency channels, and antenna switches.

Wherein each set of radio frequency channels 110 includes: the first end of the rf processing circuit of each frequency band is used to connect to the corresponding rf interface of the rf transceiver 200, the second ends of the rf processing circuits of the frequency bands are all connected to the multiple connection ends of the first side of the antenna switch 120, and the multiple connection ends of the second side of the antenna switch 120 are respectively used to connect to the multiple antenna units of the antenna module 300.

The plurality of rf channels 110 may implement rf transmission/reception, and are connected to the plurality of antenna units through the antenna switch 120. Illustratively, the number of groups of the rf channels 110 is equal to the number of antenna elements, and if the number of groups of the rf channels 110 and the number of antenna elements are both N, the antenna switch 120 is an NPNT switch (multi-pole multi-throw switch), where N is a positive integer greater than or equal to 2. The NPNT antenna switch 120 can realize arbitrary connection of N input pins and N output pins to realize antenna selection and switching functions, and by switching the NPNT switch, each group of radio frequency channels in the multiple groups of radio frequency channels 110 can be connected with each antenna unit in the multiple antenna units, thereby expanding the port switching function of the radio frequency front-end module. And, a plurality of groups of radio frequency channels are connected with a plurality of antenna units through an NPNT switch, thereby reducing the structural complexity of the radio frequency front-end module and reducing the cost of the radio frequency front-end module.

Illustratively, the plurality of frequency bands include frequency bands in 2G, 3G, 4G, 5G, 6G signals, such as n77 (3300-. However, the present application does not limit the specific frequency range, and other communication frequency bands may be used.

To sum up, the radio frequency front end module that this application embodiment provided includes: multiunit radio frequency channel, antenna switch, wherein, every group radio frequency channel includes: the first end of the radio frequency processing circuit of each frequency band is used for being connected with a corresponding radio frequency interface on a radio frequency transceiver, the second ends of the radio frequency processing circuits of the frequency bands are connected with a plurality of connecting ends of a first side in an antenna switch, and the connecting ends of the second side in the antenna switch are respectively used for being connected with a plurality of antenna units in an antenna module. Therefore, through the connection relation between the plurality of groups of radio frequency channels and the antenna switch, the port switching function of the radio frequency front-end module is expanded, the structural complexity of the radio frequency front-end module is reduced, and the cost of the radio frequency front-end module is reduced.

Fig. 2 is a schematic structural diagram of a radio frequency transceiving channel according to an embodiment of the present disclosure. As shown in fig. 2, the plurality of sets of rf channels includes: a plurality of radio frequency transceiving channels, wherein each radio frequency transceiving channel comprises: a multi-frequency-band transceiving processing circuit, a multi-frequency-band combiner and a coupler.

The first end of the transceiving processing circuit 111 of each frequency band is used for connecting a transmitting interface and a receiving interface of a corresponding frequency band on the radio frequency transceiver, the second ends of the transceiving processing circuits 111 of a plurality of frequency bands are connected with the first ends corresponding to the plurality of frequency bands in the multiband combiner 112, the second end of the multiband combiner 112 is connected with the first target connection end of the first side on the antenna switch 120 through the coupler 113, and the first target connection end is a connection end corresponding to a transceiving antenna unit in the antenna module.

Each of the plurality of rf transceiving channels may transmit rf signals or may receive rf signals. The multiband combiner 112 combines the signals of multiple frequency bands input by multiple radio frequency transceiving channels together for output, and the multiband combiner 112 has a connection end corresponding to the multiple frequency bands. The coupler 113, also called a power distribution component, can couple a multi-mode signal into a single-mode signal, for example, couple a radio frequency transmitting signal and a radio frequency receiving signal into a single signal. The rf signal is transmitted to the antenna unit through the transceiving processing circuit 111, the multiband combiner 112, the coupler 113, and the antenna switch 120 for transmission, or the rf signal may be received through the antenna unit, the coupler 113, the multiband combiner 112, and the transceiving processing circuit 111. Through setting up a combiner and a coupler for multichannel multifrequency section receiving and dispatching signal can couple, realizes that multichannel signal inputs or exports jointly, has reduced components and parts quantity, has reduced the structure complexity among the radio frequency receiving and dispatching passageway, has reduced the cost of radio frequency front end module.

In summary, in the present embodiment, the plurality of rf channels include: a plurality of radio frequency transceiving channels, wherein each radio frequency transceiving channel comprises: the multi-band combiner comprises a receiving and transmitting processing circuit with a plurality of frequency bands, a multi-band combiner and a coupler; the first end of the receiving and transmitting processing circuit of each frequency band is used for connecting a transmitting interface and a receiving interface of the corresponding frequency band on the radio frequency transceiver, the second ends of the receiving and transmitting processing circuits of the multiple frequency bands are connected with the first ends corresponding to the multiple frequency bands in the multi-frequency band combiner, the second ends of the multi-frequency band combiner are connected with a first target connecting end on the first side of the antenna switch through a coupler, and the first target connecting end is a connecting end corresponding to a receiving and transmitting antenna unit in the antenna module. Therefore, through the arrangement of the combiner and the coupler, the common input or output of multiple paths of signals is realized, the number of components is reduced, the structural complexity in a radio frequency transceiving channel is reduced, and the cost of a radio frequency front-end module is reduced.

Fig. 3 is a schematic structural diagram of a transceiving processing circuit according to an embodiment of the present disclosure. As shown in fig. 3, the transceiving processing circuit of the first frequency band of the plurality of frequency bands includes: a power amplifier, a low noise amplifier, and a switch.

The input end of the power amplifier 114 is used for connecting a transmitting interface of the first frequency band in the radio frequency transceiver 200, the output end of the power amplifier 114 is connected to the first end of the switch 116, the output end of the low noise amplifier 115 is used for connecting a receiving interface of the first frequency band in the radio frequency transceiver 200, the input end of the low noise amplifier 115 is connected to the second end of the switch 116, and the third end of the switch 116 is connected to the corresponding connecting end of the first frequency band on the multiband combiner 112.

The switch 116 is a single-pole double-throw switch, and the multiband combiner 112 is connected with the power amplifier 114 or the low noise amplifier 115 by controlling the single-pole double-throw switch. The power amplifier 114 is configured to amplify the radio frequency signal transmitted by the transmission interface of the radio frequency transceiver 200 at the first frequency band, and transmit the amplified radio frequency signal to the connection end of the switched multiband combiner 112 corresponding to the first frequency band through the switch 116, so as to form a radio frequency transmission circuit. The low noise amplifier 115 is configured to improve a signal-to-noise ratio of the output signal, receive the radio frequency signal transmitted by the connection end corresponding to the first frequency band on the multiband combiner 112 through the switch 116, perform low noise amplification on the radio frequency signal to improve the signal-to-noise ratio, and transmit the radio frequency signal after the low noise amplification to the receiving interface of the first frequency band in the radio frequency transceiver 200, so as to form a radio frequency receiving circuit. By arranging the power amplifier 114 and the low noise amplifier 115, the transmission and the reception of the radio frequency signals are more accurate and are convenient to identify.

For example, the first frequency band may be: n77 (3300-.

In summary, in the embodiment of the present application, the transceiver processing circuit of the first frequency band of the multiple frequency bands includes: a power amplifier, a low noise amplifier, and a switch; the input end of the power amplifier is used for being connected with a transmitting interface of a first frequency band in the radio frequency transceiver, the output end of the power amplifier is connected with the first end of the switch, the output end of the low-noise amplifier is used for being connected with a receiving interface of the first frequency band in the radio frequency transceiver, the input end of the low-noise amplifier is connected with the second end of the switch, and the third end of the switch is connected with a connecting end corresponding to the first frequency band on the multi-frequency band combiner. Therefore, by arranging the power amplifier and the low-noise amplifier, the transmission and the reception of the radio-frequency signals are more accurate and convenient to identify.

With continued reference to fig. 3, a band pass filter corresponding to the first frequency band is integrated into the multi-band combiner 112. Illustratively, when the first frequency band includes n77 (3300-; when the first frequency band includes n79 (4400-. Such as filters like SAW, TC _ SAW, IHP SAW, BAW, LTCC, IPD, etc., and combinations thereof.

Fig. 4 is a schematic structural diagram of another transceiving processing circuit according to an embodiment of the present application. As shown in fig. 4, the transceiving processing circuit of the second frequency band of the plurality of frequency bands includes: the antenna comprises a power amplifier, a low noise amplifier, a plurality of duplexers, a plurality of transmitting filters, a plurality of receiving filters, a single-band combiner, a first switch, a second switch and a third switch.

The input terminal of the power amplifier 114 is used for connecting the transmission interface of the second frequency band in the radio frequency transceiver 200, the output terminal of the power amplifier 114 is connected to one terminal of the first switch 122, and a plurality of other terminals of the first switch 122 are respectively connected to one connection terminal of the third switch 124 on the first side through a plurality of transmission filters 118. The output end of the low noise amplifier 115 is used for connecting a receiving interface of the second frequency band in the radio frequency transceiver 200, the input end of the low noise amplifier 115 is connected to one end of the second switch 123, and a plurality of other ends of the second switch 123 are respectively connected to a plurality of connection ends of the third switch 124 on the first side through a plurality of receiving filters 119. The two connection ends of the third switch 124 on the second side are respectively connected to the two connection ends on the first side of the single-band combiner 121, and the connection end on the second side of the single-band combiner 121 is connected to the connection end corresponding to the second band on the multi-band combiner 112.

There are multiple sub-bands in the second band, with different sub-bands corresponding to different transmit filters 118 and receive filters 119, thus requiring multiple transmit filters 118 and multiple receive filters 119. A plurality of duplexers 117 are further connected between the first switch 122 and the third switch 124, the first switch 122 is a single-pole multi-throw switch, and the first switch 122 can enable the power amplifier 114 to be connected with different transmit filters 118 or duplexers 117. The second switch 123 is also connected to a third switch 124 through a plurality of duplexers 117, the second switch 123 is a single-pole multi-throw switch, and the second switch 123 can be used to connect the low noise amplifier 115 to a different receiving filter 119 or duplexer 117. The single-band combiner 121 is connected to the transmitting filter 118 or the receiving filter 119 or the duplexer 117 through the third switch 124, so that the functions of transmitting and receiving radio frequency corresponding to the transceiving processing circuit 111 of the second band are realized, and the transmitted and received radio frequency signals are more accurate through filtering and amplifying processing.

For example, the second Frequency band is a Frequency band corresponding to 2G, 3G, or 4G, if the sub-Frequency band is FDD (Frequency Division duplex), the first switch 122 and the second switch 123 are both required to be connected to the duplexer 117, and the duplexer 117 is composed of two filters, and the two filters operate simultaneously; if the sub-band is TDD (Time Division duplex), the first switch 122 is connected to the transmitting filter 118, the second switch 123 is connected to the receiving filter 119, and the transmitting filter 118 and the receiving filter 119 work in a Time-sharing manner, which does not need to work simultaneously.

In summary, in the embodiment of the present application, the transceiver processing circuit of the second frequency band of the multiple frequency bands includes: the device comprises a power amplifier, a low noise amplifier, a plurality of duplexers, a plurality of transmitting filters, a plurality of receiving filters, a single-band combiner, a first switch, a second switch and a third switch; the input end of the power amplifier is used for connecting a transmitting interface of a second frequency band in the radio frequency transceiver, the output end of the power amplifier is connected with one end of a first switch, and a plurality of other ends of the first switch are respectively connected with one connecting end of a third switch on a first side through a plurality of transmitting filters; the output end of the low-noise amplifier is used for connecting a receiving interface of a second frequency band in the radio frequency transceiver, the input end of the low-noise amplifier is connected with one end of a second switch, and a plurality of other ends of the second switch are respectively connected with a plurality of connecting ends of a third switch on a first side through a plurality of receiving filters; two connecting ends of the third switch on the second side are respectively connected with two connecting ends of the first side on the single-frequency band combiner, and the connecting end of the single-frequency band combiner on the second side is connected with the connecting end corresponding to the second frequency band on the multi-frequency band combiner. Therefore, through filtering and amplifying processing, the transmitted and received radio frequency signals are more accurate.

With continued reference to fig. 4, the multiband combiner is integrated with a low-pass filter corresponding to the second frequency band. Such as filters like SAW, TC _ SAW, IHP SAW, BAW, LTCC, IPD, etc., and combinations thereof.

Fig. 5 is a schematic structural diagram of a radio frequency receiving channel according to an embodiment of the present application. As shown in fig. 5, the plurality of sets of rf channels includes: a plurality of radio frequency receive channels, wherein each radio frequency receive channel comprises: a multi-band reception processing circuit 125 and a multi-band combiner 112.

The first end of the receiving processing circuit 125 of each frequency band is used for connecting a receiving interface of a corresponding frequency band on the radio frequency transceiver, the second ends of the receiving processing circuits 125 of multiple frequency bands are connected to the first ends corresponding to the multiple frequency bands in the multiband combiner 112, the second end of the multiband combiner 112 is connected to the second target connection end of the first side of the antenna switch 120, and the second target connection end is a connection end corresponding to a receiving antenna unit in the antenna module 300.

Each of the plurality of radio frequency receive channels may receive a radio frequency signal. The multiband combiner 112 separates multiband rf signals transmitted by the receiving antenna unit, and transmits the signals to the receiving processing circuits 125 corresponding to multiple frequency bands. Through setting up the combiner, with the separation of multifrequency section radio frequency signal, realize that the multifrequency section signal exports jointly, reduced components and parts quantity, reduced the structure complexity in the radio frequency receiving and dispatching passageway, reduced the cost of radio frequency front end module.

In summary, in the embodiment of the present application, the multiple groups of rf channels include: a plurality of radio frequency receive channels, wherein each radio frequency receive channel comprises: a multi-frequency band receiving and processing circuit and a multi-frequency band combiner; the first end of the receiving processing circuit of each frequency band is used for being connected with a receiving interface of the corresponding frequency band on the radio frequency transceiver, the second ends of the receiving processing circuits of the multiple frequency bands are connected with the first ends corresponding to the multiple frequency bands in the multi-frequency band combiner, the second end of the multi-frequency band combiner is connected with the second target connecting end of the first side on the antenna switch, and the second target connecting end is the connecting end corresponding to the receiving antenna unit in the antenna module. Therefore, through the arrangement of the combiner, the multi-band radio frequency signals are separated, the multi-band signals are output together, the number of components is reduced, the structural complexity in a radio frequency transceiving channel is reduced, and the cost of the radio frequency front-end module is reduced.

Fig. 6 is a schematic structural diagram of a receiving processing circuit according to an embodiment of the present disclosure. As shown in fig. 6, the receiving processing circuit of the first frequency band among the plurality of frequency bands includes: a low noise amplifier 115.

The output terminal of the low noise amplifier 115 is used for connecting to the receiving interface of the first frequency band in the radio frequency transceiver 200, and the input terminal of the low noise amplifier 115 is connected to the first terminal corresponding to the first frequency band in the multiband combiner 112.

The low noise amplifier 115 is configured to improve a signal-to-noise ratio of the output signal, receive the radio frequency signal transmitted by the connection end corresponding to the first frequency band on the multiband combiner 112, perform low noise amplification on the radio frequency signal to improve the signal-to-noise ratio, and transmit the radio frequency signal after the low noise amplification to a receiving interface of the first frequency band in the radio frequency transceiver 200, so as to form a radio frequency receiving circuit. By arranging the low noise amplifier 115, the radio frequency signal is received more accurately and is convenient to identify.

For example, the first frequency band may be: n77 (3300-.

In summary, in this embodiment, the receiving and processing circuit of the first band of the multiple bands includes: a low noise amplifier; the output end of the low-noise amplifier is used for being connected with a receiving interface of a first frequency band in the radio frequency transceiver, and the input end of the low-noise amplifier is connected with a first end corresponding to the first frequency band in the multi-frequency band combiner. Therefore, the low-noise amplifier is arranged, so that the radio-frequency signals are received more accurately and are convenient to identify.

Fig. 7 is a schematic structural diagram of another receiving processing circuit according to an embodiment of the present disclosure. As shown in fig. 7, the receiving processing circuit of the second frequency band among the plurality of frequency bands includes: the low noise amplifier, a plurality of receiving filters, a single-band combiner, a first switch and a second switch.

The output end of the low noise amplifier 115 is used for connecting a receiving interface of the second frequency band in the radio frequency transceiver 200, the input end of the low noise amplifier 115 is connected to one end of the first switch 122, and a plurality of other ends of the first switch 122 are respectively connected to a plurality of connection ends of the second switch 123 on the first side through a plurality of receiving filters 119.

The two connection ends of the second switch 123 on the second side are respectively connected to the two connection ends on the first side of the single-band combiner 121, and the connection end of the single-band combiner 121 on the second side is connected to the connection end corresponding to the second band on the multi-band combiner 112.

There are multiple sub-bands in the second band, and different sub-bands correspond to different receive filters 119, so multiple receive filters 119 are required. The first switch 122 is a single-pole multi-throw switch, and the low noise amplifier 115 can be connected to different receiving filters 119 through the first switch 122. The second switch 123 is a single-pole multi-throw switch, and the connection of the single-band combiner 121 with different receiving filters 119 can be realized through the second switch 123. Through filtering and amplification processing, the function of receiving radio frequency corresponding to the receiving processing circuit 125 of the second frequency band is realized, and the accuracy of receiving radio frequency signals is improved. Illustratively, the second frequency band is a frequency band corresponding to 2G, 3G, 4G.

In summary, in this embodiment, the receiving and processing circuit of the second frequency band of the multiple frequency bands includes: the low-noise amplifier comprises a low-noise amplifier, a plurality of receiving filters, a single-frequency-band combiner, a first switch and a second switch; the output end of the low-noise amplifier is used for connecting a receiving interface of a second frequency band in the radio frequency transceiver, the input end of the low-noise amplifier is connected with one end of a first switch, and a plurality of other ends of the first switch are respectively connected with a plurality of connecting ends of a second switch on a first side through a plurality of receiving filters; two connecting ends of the second switch on the second side are respectively connected with two connecting ends of the first side on the single-band combiner, and the connecting end of the single-band combiner on the second side is connected with the connecting end corresponding to the second frequency band on the multi-band combiner. Therefore, through filtering and amplifying processing, the precision of receiving the radio frequency signal is improved.

On the basis of any one of the embodiments described in fig. 1 to fig. 7, the embodiment of the present application further provides a radio frequency system. Fig. 8 is a schematic structural diagram of a radio frequency system. As shown in fig. 8, the radio frequency system includes: radio frequency front end module, radio frequency transceiver and antenna module.

The rf interfaces of the rf transceiver 200 are respectively connected to the rf processing circuits of multiple frequency bands in each set of rf channels 110 of the rf front-end module 100, and the antenna switch 120 of the rf front-end module 100 is connected to multiple antenna units of the antenna module 300.

Through the multiple groups of radio frequency channels 110 and the antenna switch 120 in the radio frequency front-end module 100, the multiple groups of radio frequency channels in the radio frequency front-end module 100 are alternately connected with the multiple antenna units in the antenna module through the antenna switch 120 through the radio frequency channels 110, so that the port switching function of the radio frequency front-end module 100 is expanded, and the applicability of a radio frequency system is wider.

For the purpose of better clarity of the description of the solution of the present application, the 2T4R rf front-end module provided in the present application is explained below by taking 2T4R (2 transmit channels, 4 receive channels) as an example. Fig. 9 is a schematic structural diagram of a 2T4R rf front end module according to an embodiment of the present application. As shown in fig. 9, the 2T4R rf front end module includes: two rf transmit and receive channels, two rf receive channels, and an antenna switch 120.

Wherein, the first frequency channel includes: frequency band B, frequency band C, the second frequency band includes: band a. Correspondingly, each radio frequency transceiving channel comprises: a transmission/reception processing circuit 111 of band a, a transmission/reception processing circuit 111 of band B, a transmission/reception processing circuit 111 of band C, a multiband combiner 112, and a coupler 113. Each radio frequency receive channel includes: a reception processing circuit 125 of a band a, a reception processing circuit 125 of a band B, a reception processing circuit 125 of a band C, and a multiband combiner 112. The multiband combiner 112 is integrated with: a filter fA corresponding to frequency band a, a filter fB corresponding to frequency band B, and a filter fC corresponding to frequency band C. The first band transmission/reception processing circuit 111 includes: a power amplifier 114, a low noise amplifier 115, and a switch 116; the reception processing circuit 125 for the first frequency band includes: a low noise amplifier 115. The antenna switch 120 is a 4P4T (four-pole four-throw) switch, and the antenna switch 120 is connected to 4 antenna elements (ANT1, ANT2, ANT3, ANT4) correspondingly. The switching of the 4P4T switch realizes the arbitrary switching connection between the 4 rf channels 110 and the 4 antenna elements.

A transmitting terminal (Tx1_ A, Tx2_ a) of the transceiving processing circuit 111 of the frequency band a, a transmitting terminal (Tx1_ B, Tx2_ B) of the transceiving processing circuit 111 of the frequency band B, and a transmitting terminal (Tx1_ C, Tx2_ C) of the transceiving processing circuit 111 of the frequency band C are all connected to a transmitting interface of a corresponding frequency band on the radio frequency transceiver; the transceiving processing circuit 111 in the frequency band a, the receiving terminal (Rx1_ A, Rx2_ A, Rx3_ A, Rx4_ a) of the receiving processing circuit 125, the transceiving processing circuit 111 in the frequency band B, the transmitting terminal (Tx1_ B, Tx2_ B, Rx3_ B, Rx4_ B) of the receiving processing circuit 125, the transceiving processing circuit 111 in the frequency band C, and the transmitting terminal (Tx1_ C, Tx2_ C, Rx3_ C, Rx4_ C) of the receiving processing circuit 125 are all connected to the receiving interface of the corresponding frequency band on the radio frequency transceiver. For example, the frequency band a may be the frequency bands corresponding to 2G, 3G, and 4G, the frequency band B may be n77 (3300-.

For the rf signals in the frequency band B and the frequency band C, the power amplifier 114 may be used to amplify the rf signals when transmitting the rf signals; in receiving the radio frequency signal, the low noise amplifier 115 may be used to increase the signal to noise ratio of the radio frequency signal. To the whole 2T4R radio frequency front end module that this application provided, only use four combiners and two combiners, compare in current 2T4R radio frequency front end module, simple structure, it is with low costs, simultaneously, expanded the port switching function of radio frequency front end module, realized SRS (Sounding Reference Signal) Signal antenna function of sending in turn.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Claims

1. A radio frequency front end module, the radio frequency front end module comprising: multiunit radio frequency channel, antenna switch, wherein, every group radio frequency channel includes: the radio frequency processing circuit of a plurality of frequency channels, the radio frequency processing circuit's of every frequency channel first end is used for connecting the radio frequency interface that corresponds on the radio frequency transceiver, the radio frequency processing circuit's of a plurality of frequency channels second end is all connected a plurality of links of first side in the antenna switch, a plurality of links of second side are used for connecting a plurality of antenna element in the antenna module respectively in the antenna switch.

2. The module of claim 1, wherein the plurality of sets of radio frequency channels comprise: a plurality of radio frequency transceiving channels, wherein each radio frequency transceiving channel comprises: the receiving and transmitting processing circuit, the multi-band combiner and the coupler of the multiple frequency bands;

3. The module of claim 2, wherein the transceiver processing circuit for a first band of the plurality of bands comprises: a power amplifier, a low noise amplifier, and a switch;

4. The module of claim 3, wherein a band pass filter corresponding to the first frequency band is integrated in the multi-band combiner.

5. The module of claim 2, wherein the transceiver processing circuitry for a second band of the plurality of bands comprises: the device comprises a power amplifier, a low noise amplifier, a plurality of duplexers, a plurality of transmitting filters, a plurality of receiving filters, a single-band combiner, a first switch, a second switch and a third switch;

6. The module of claim 5, wherein the multi-band combiner is integrated with a low-pass filter corresponding to the second frequency band.

7. The module of claim 1, wherein the plurality of sets of radio frequency channels comprise: a plurality of radio frequency receive channels, wherein each radio frequency receive channel comprises: a multi-frequency band receiving and processing circuit and a multi-frequency band combiner;

8. The module of claim 7, wherein the receive processing circuitry for a first band of the plurality of bands comprises: a low noise amplifier;

9. The module of claim 7, wherein the receive processing circuitry for a second band of the plurality of bands comprises: the low noise amplifier, the plurality of receiving filters, the single-band combiner, the first switch and the second switch;

10. A radio frequency system, comprising: the rf front-end module, rf transceiver and antenna module of any of claims 1-9;

the radio frequency transceiver is provided with a plurality of radio frequency interfaces which are respectively connected with the radio frequency processing circuits of a plurality of frequency bands in each group of radio frequency channels in the radio frequency front-end module, and an antenna switch in the radio frequency front-end module is connected with a plurality of antenna units in the antenna module.