CN111565057A

CN111565057A - Radio frequency front-end module, antenna device and communication terminal

Info

Publication number: CN111565057A
Application number: CN202010580394.8A
Authority: CN
Inventors: 胡自洁; 曹原; 倪楠; 倪建兴
Original assignee: Radrock Shenzhen Technology Co Ltd
Current assignee: Radrock Shenzhen Technology Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-08-21
Anticipated expiration: 2040-06-23
Also published as: CN111565057B; WO2021258520A1

Abstract

The invention provides a radio frequency front-end module, an antenna device and a communication terminal, aiming at solving the problems that the radio frequency front-end module cannot further optimize the performance of the radio frequency front-end module due to great inconvenience in practical application after the integration level of the radio frequency front-end module is higher and higher in the prior art, and the debugging freedom degree of each device is reduced. The communication terminal provided by the invention optimizes the radio frequency front end module on the internal antenna device, can work in a multi-antenna working mode, realizes the selection of a plurality of antenna links, and the radio frequency signal of each antenna link is selectable. The multi-channel transmission and multi-channel reception of the radio frequency signals are realized, and meanwhile, different frequency band signals needing to be accessed can be flexibly controlled and adjusted. The circuit structure of the scheme is simple, different frequency band signals needing to be accessed can be flexibly controlled and adjusted, the debugging freedom degree of the scheme is increased, and the performance of the radio frequency front-end module is optimized.

Description

Radio frequency front-end module, antenna device and communication terminal

Technical Field

The invention relates to the field of wireless communication systems of communication terminals, in particular to an antenna device on a communication terminal, and further relates to a radio frequency front-end module in the antenna device.

Background

With the rapid development of mobile communication technology, as shown in fig. 1, a communication terminal implements wireless communication thereof through a built-in antenna device. As shown in fig. 2, the conventional antenna apparatus generally includes a baseband module, a radio frequency transceiver module, a radio frequency front-end module, and an antenna link module; the baseband module is used for executing digital baseband signal processing and coding and decoding the digital baseband signal; the radio frequency transceiver module is used for performing conversion between digital base frequency and analog radio frequency signals, processing the digital base frequency signals sent by the base band module into radio frequency analog signals and then sending the radio frequency analog signals to the radio frequency front end module, or receiving the radio frequency analog signals transmitted by the radio frequency front end module, converting the radio frequency analog signals into digital base frequency signals and sending the digital base frequency signals to the base band module; the radio frequency front end module selects to send radio frequency analog signals to the antenna link module or receive the radio frequency analog signals from the antenna link module, and amplification, filtering and other processing of the radio frequency analog signals are achieved. The antenna link module comprises an external antenna to receive or transmit the radio frequency analog signal.

The radio frequency front-end module plays a role of playing a role as an indispensable component. With the increase of new frequency bands, carrier aggregation, Multiple Input Multiple output (MIMO, full name of Multiple Input Multiple output) and other technologies are widely applied, so that various radio frequency devices are more and more, and a radio frequency front end module is more and more complicated. At present, a widely used technical scheme is to integrate a Low noise Amplifier (LNA, PA), a Power Amplifier, a filter, a duplexer, a switch, and the like into one chip to form a complete rf front-end module. However, with the coming of the 5G era, the requirements on the system capacity and the integration level of the radio frequency front end module are higher and higher, and although the traditional technical scheme can reduce the occupied area of each radio frequency device, the integration mode reduces the debugging freedom of each device, which brings great inconvenience in practical application, and the performance of the radio frequency front end module cannot be further optimized.

Disclosure of Invention

The invention provides a radio frequency front-end module, an antenna device and a communication terminal, aiming at solving the problems that the radio frequency front-end module cannot further optimize the performance of the radio frequency front-end module due to great inconvenience in practical application after the integration level of the radio frequency front-end module is higher and higher in the prior art, and the debugging freedom degree of each device is reduced.

The invention provides a radio frequency front end module on one hand, which comprises two paths of signal transceiving circuits and an antenna switch selection module; the two signal transceiving circuits are connected with the antenna switch selection module;

each signal transceiver circuit comprises a radio frequency power amplifier module, a radio frequency transceiver switch and a filter which are arranged in sequence;

the radio frequency power amplifier module comprises a low noise amplifier and a power amplifier; the power amplifier and the low noise amplifier are connected with the radio frequency transceiving switch; the low noise amplifier is used for receiving the radio frequency signal transmitted from the radio frequency transceiving switch, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving module; the power amplifier is used for receiving the radio frequency signal sent by the radio frequency transceiving module, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving switch;

the radio frequency transceiving switch is arranged between the radio frequency power amplifier module and the filter and used for switching the connection between the filter and the low noise amplifier or the power amplifier so as to selectively connect the filter with the low noise amplifier or the power amplifier;

the filter is arranged between the antenna switch selection module and the radio frequency transceiving switch and is used for filtering the radio frequency signal amplified by the power amplifier and then transmitting the radio frequency signal to the antenna switch selection module or filtering the radio frequency signal received from the antenna selection module and then transmitting the radio frequency signal to the low noise amplifier;

the antenna switch selection module comprises a plurality of antenna switches, a plurality of main antenna switch ports, a plurality of peripheral antenna ports and a plurality of external low-noise amplification ports; the antenna switch is arranged among the filter, the main antenna switch ports, the peripheral antenna ports and the external low-noise amplification ports and is used for realizing the gating of the filter, the main antenna switch ports, the peripheral antenna ports and the external low-noise amplification ports;

the two signal transceiving circuits comprise a first signal transceiving circuit and a second signal transceiving circuit; the first signal transceiving circuit and the second signal transceiving circuit are both connected to the antenna switch selection module;

the first signal transceiving circuit comprises a first radio frequency power amplifier module, a first radio frequency transceiving switch and a first filter which are arranged in sequence;

the second signal transceiver circuit comprises a second radio frequency power amplifier module, a second radio frequency transceiver switch and a second filter which are arranged in sequence;

the antenna switch comprises a main antenna switch, a peripheral antenna selection switch and a peripheral low-noise amplification switch;

the main antenna switch comprises a first main antenna switch, a second main antenna switch, a third main antenna switch and a fourth main antenna switch;

the plurality of main antenna switch ports comprise a first trunk antenna port and a second trunk antenna port; the plurality of peripheral antenna ports comprises a first peripheral antenna port, a second peripheral antenna port, and a third peripheral antenna port; the plurality of external low-noise amplification ports comprise a first external low-noise amplification port, a second external low-noise amplification port and a third external low-noise amplification port;

the first filter is connected to the first main antenna port through a first main antenna switch, and the third main antenna switch is connected to the second main antenna port; the second filter is connected to the first main antenna port through a second main antenna switch, and the fourth main antenna switch is connected to the second main antenna port;

the peripheral switches include a first peripheral selection switch and a second peripheral selection switch; the first peripheral selection switch and the second peripheral selection switch each include a first end and a second end;

the peripheral antenna selection switch comprises a first peripheral antenna selection switch, a second peripheral antenna selection switch and a third peripheral antenna selection switch;

the peripheral low-noise amplification switch comprises a first peripheral low-noise amplification switch, a second peripheral low-noise amplification switch and a third peripheral low-noise amplification switch;

a first end of the first peripheral selection switch is connected to a first filter; a first terminal of the second peripheral selection switch is connected to a second filter; a second terminal of the first peripheral selection switch and a second terminal of the second peripheral selection switch are connected in common;

the first peripheral antenna selection switch and the first peripheral low-noise amplification switch are connected in series between the second ends of the first peripheral selection switch and the second peripheral selection switch and the first external low-noise amplification port; the first peripheral antenna port is led out between the first peripheral antenna selection switch and the first peripheral low-noise amplification switch;

the second peripheral antenna selection switch and the second peripheral low-noise amplification switch are connected in series between the second ends of the first peripheral selection switch and the second external low-noise amplification port; a second peripheral antenna port is led out between the second peripheral antenna selection switch and the second peripheral low-noise amplification switch;

the third peripheral antenna selection switch and the third peripheral low-noise amplification switch are connected in series between the second ends of the first peripheral selection switch and the second peripheral selection switch and the third external low-noise amplification port; and a third peripheral antenna port is led out between the third peripheral antenna selection switch and the third peripheral low-noise amplification switch.

The second aspect of the present invention provides an antenna apparatus, which includes a baseband module, a radio frequency transceiver module, a radio frequency front end module, and an antenna link module; the radio frequency front end module is the radio frequency front end module.

A third aspect of the present invention provides a communication terminal, said antenna device.

The communication terminal provided by the invention optimizes a radio frequency front end module on an internal antenna device, can work in a multi-antenna working mode through two signal transceiving circuits and an antenna switch selection module, realizes the receiving or sending of radio frequency signals through the radio frequency transceiving switch, and can select related ports through the antenna switch selection module so as to realize the connection of an external main antenna link and a peripheral antenna link and realize the selection of a plurality of antenna links, and the radio frequency signals of each antenna link are selectable. After the radio-frequency signal passes through the transceiving path, the radio-frequency signal can be accessed to a signal of any frequency band through a corresponding antenna port by selecting an antenna switch in the antenna switch selection module. The multi-channel transmission and multi-channel reception of the radio frequency signals are realized, and meanwhile, different frequency band signals needing to be accessed can be flexibly controlled and adjusted. The circuit structure of the scheme is simple, different frequency band signals needing to be accessed can be flexibly controlled and adjusted, the debugging freedom degree of the scheme is increased, and the performance of the radio frequency front-end module is optimized.

Drawings

Fig. 1 is a schematic diagram of an internal antenna arrangement in a communication terminal;

fig. 2 is a structural frame diagram of the antenna device;

FIG. 3 is a schematic diagram of a radio frequency front end module provided in an embodiment of the present invention;

fig. 4 is a schematic diagram of an antenna arrangement provided in an embodiment of the present invention;

fig. 5 is a schematic diagram of a radio frequency front end module after refinement of an antenna switch selection module provided in an embodiment of the present invention;

fig. 6 is a schematic diagram of an antenna switch selection module provided in an embodiment of the present invention after a radio frequency front end module is connected to an antenna link module;

fig. 7 is a schematic diagram of a further detailed connection between the antenna switch selection module and the antenna link module according to the embodiment of the present invention;

fig. 8 is a schematic diagram of a further optimized antenna device connection provided in the embodiment of the present invention.

1000, a communication terminal; 100. an antenna device; 1. a radio frequency front end module; 2. a radio frequency transceiver module; 3. an antenna link module; 4. a baseband module; 1a, a first radio frequency front end module; 1b, a second radio frequency front end module; 3a, a main antenna link; 3b, a peripheral antenna link;

11. a radio frequency power amplifier module; 12. a radio frequency transmit-receive switch; 13. an antenna switch selection module; 14. a filter;

11a, a first radio frequency power amplifier module; 11b, a second radio frequency power amplifier module; 12a, a first radio frequency transceiving switch; 12b, a second radio frequency transceiving switch; 14a, a first filter; 14b, a second filter;

111. a low noise amplifier; 112. a power amplifier; 113. a matching network;

111a, a first low noise amplifier; 111b, a second low noise amplifier; 112a, a first power amplifier; 112b, a second power amplifier; 113a, a first matching network; 113b, a second matching network;

k11, a first backbone antenna switch; k12, a second backbone antenna switch; k21, a third backbone antenna switch; k22, a fourth backbone antenna switch;

RX1, a first radio frequency receive port; RX2, a second radio frequency receive port; TX1, a first radio frequency transmit port; TX2, a second radio frequency transmit port;

ANT1, a first trunk antenna port; ANT2, a second trunk antenna port;

AUX1, a first peripheral antenna port; AUX2, a second peripheral antenna port; AUX3, third peripheral antenna port;

l1, a first external low-noise amplification port; l2, a second external low-noise amplification port; l3, a third external low-noise amplification port;

k31, a first peripheral selection switch; k32, a second peripheral selection switch;

k41, a first peripheral antenna selection switch; k42, a second peripheral antenna selection switch; k43, a third peripheral antenna selection switch;

k51, a first peripheral low-noise amplification switch; k52, a second peripheral low-noise amplification switch; k53, a third peripheral low-noise amplification switch;

31. a first backbone antenna; 32. a second backbone antenna; 33. a first peripheral antenna; 34. a second peripheral antenna;

35. a first peripheral low noise amplifier; 36. a second peripheral low noise amplifier; 37. a third peripheral low noise amplifier; 351. a first external filter; 352. a second external filter; 353. and a third external filter.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The present embodiment specifically explains the communication terminal 1000, the antenna device 100 and the rf front-end module 1 disclosed in the present invention.

As shown in fig. 1, a communication terminal 1000 that realizes wireless communication by a built-in antenna device 100 is provided in this example. The antenna device 100 realizes the outward transmission of the radio frequency signals of the relevant frequency band and the reception of the radio frequency signals of the relevant frequency band through each module therein. Of course, the communication terminal 1000 may include not only the antenna apparatus 100, but also other modules, such as a processor, a user interface, a memory, and the like. The communication terminal is, for example, a Personal Digital Assistant (PDA), a cellular phone, a card in a notebook computer, a wireless tablet computer, or the like.

As shown in fig. 2, the antenna apparatus 100 in this example also includes a baseband module 4, an rf transceiver module 2, an rf front-end module 1, and an antenna link module 3; the baseband module 4 is used for performing digital baseband signal processing and performing encoding and decoding of digital baseband signals; the radio frequency transceiver module 2 is used for performing conversion between a digital base frequency and an analog radio frequency signal, processing the digital base frequency signal sent by the baseband module 4 into a radio frequency analog signal and then sending the radio frequency analog signal to the radio frequency front end module 1, or receiving the radio frequency analog signal transmitted by the radio frequency front end module 1, converting the radio frequency analog signal into a digital base frequency signal and sending the digital base frequency signal to the baseband module 4; the radio frequency front-end module 1 selects to send radio frequency analog signals to the antenna link module 3 or receive radio frequency analog signals from the antenna link module 3, and realizes the processing of amplification, filtering and the like of the radio frequency analog signals. The antenna link module 3 includes an external antenna to receive or transmit the radio frequency analog signal. The above modules are known, and the core differences in the present application are the improvement of the rf front-end module 1 and the specific matching of the antenna link module 3. Therefore, the following description will be made in detail with reference to the rf front-end module 1 and the antenna link module 3, without further explanation.

As shown in fig. 3, the rf front-end module 1 provided in this embodiment includes two signal transceiver circuits and an antenna switch selection module 13; the two signal transceiving circuits are connected with the antenna switch selection module 13;

each path of signal transceiver circuit comprises a radio frequency power amplifier module 11, a radio frequency transceiver switch 12 and a filter 14 which are arranged in sequence;

the radio frequency power amplifier module 11 comprises a low noise amplifier 111 and a power amplifier 112; the power amplifier 112 and the low noise amplifier 111 are connected to the rf transceiving switch 12; the low noise amplifier 111 is configured to receive the radio frequency signal transmitted from the radio frequency transceiving switch 12, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiving module 2; the power amplifier 112 is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiver switch 12; when the radio frequency power amplifier module 11 is implemented, the radio frequency power amplifier module 11 in each signal transceiver circuit may be packaged into a single chip, or the low noise amplifiers 111 in two radio frequency power amplifier modules 11 are integrated into a single chip, and the low noise amplifiers 111 in two radio frequency power amplifier modules 11 are integrated into a single chip. It is also possible to integrate the two rf power amplifier modules 11 into one chip. Are all feasible.

The low noise amplifier 111 in the rf power amplifier module 11 is an amplifier with a very low noise figure. In the case of amplifying a weak signal, the noise of the amplifier itself may cause serious interference to the signal, and therefore it is desirable to reduce the noise of the amplifier itself to improve the signal-to-noise ratio of the output. The low noise amplifier 111 is well known to those skilled in the art, and can further amplify the received rf signal and output the amplified rf signal to the rf transceiver module 2. In this example, the output terminal of the low noise amplifier 111 is used as one of the rf receiving ports of the rf power amplifier module 11,

the power amplifier 112 in the rf power amplifier module 11 is an important part in the rf front-end module 1, and the rf signal output in the rf transceiver module 2 has a small power. The input end of the power amplifier 112 is used as one of the ports in the rf power amplifier module 11 for receiving the rf signal transmitted by the rf transceiver module 2. Because the radio frequency signal power output by the radio frequency transceiver module 2 is very small, it needs to obtain enough radio frequency power through a series of amplifications before being fed to the antenna for radiation. In order to obtain a sufficient rf output power, the power amplifier 112 must be used, and the power amplifier 112 is also well known to those skilled in the art and will not be described in detail.

Preferably, the modulated rf signal is amplified to a sufficient power by the power amplifier 112, passed through the matching network 113, and transmitted by the antenna. Therefore, in this example, a matching network 113 is connected in series between the power amplifier 112 and the rf transceiving switch 12; the power amplifier 112 in the radio frequency power amplifier module 11 is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the radio frequency signal to the matching network 113, where the matching network 113 is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the radio frequency transceiver switch 12. As for the matching network 113, it is known to satisfy a specific matching relationship between the load impedance and the impedance in the source during signal transmission. The output impedance of a device and the impedance of the connected load should satisfy a certain relationship so as not to have obvious influence on the working state of the device after the load is connected. Impedance matching is related to the overall performance of the system, and the matching can be realized to optimize the system performance. The concept of impedance matching has a wide application range, and impedance matching is commonly found between each stage of amplifying circuit, between the amplifying circuit and a load, between a signal and a transmission circuit, and in the design of a microwave circuit and a system, the matching problem has to be considered no matter whether the microwave circuit is active or passive. Those skilled in the art will be able to obtain content regarding the matching network 113 without additional inventive effort. And therefore will not be described again in this example.

The radio frequency transceiving switch 12 is arranged between the radio frequency power amplifier module 11 and the filter 14, and is used for switching the connection between the filter 14 and the low noise amplifier 111 or the power amplifier 112 so as to selectively connect the filter 14 with the low noise amplifier 111 or the power amplifier 112; the rf transceiver switch 12 (generally referred to as T/R switch) mainly controls the switching of the receiving and transmitting states of the whole rf front-end module 1, and is connected to the subsequent rf link (in this example, including the filter 14, the antenna switch selection module 13, etc.), the low noise amplifier 111 and the power amplifier 112, which are key modules of the rf front-end module 1. The conventional rf transceiver switch 12 has many manufacturing processes, and most of the products in the market currently adopt discrete devices such as III-V processes or PIN diodes. The advantage of this type of switch is that the power consumption is lower and the isolation is better. The disadvantages are high cost, large power consumption and large occupied area. Alternatively, the rf transceiver switch 12 may be implemented by an SOI (Silicon-On-Insulator) process. With the continuous development of the process technology, the CMOS technology has the outstanding advantages of high integration level, low cost, low power consumption, etc., so that the implementation of the rf transceiver switch 12 by using the CMOS technology also becomes an alternative. As is well known to those skilled in the art.

The filter 14 is disposed between the antenna switch selection module 13 and the radio frequency transceiver switch 12, and is configured to filter the radio frequency signal amplified by the power amplifier 112 and transmit the filtered radio frequency signal to the antenna switch selection module 13, or filter the radio frequency signal received from the antenna selection module and transmit the filtered radio frequency signal to the low noise amplifier 111; the filter 14 in this example is used for bidirectional filtering, and it selects filters 14 of different specifications according to the frequency bands to be passed, so as to decide which frequency bands of the radio frequency signals are allowed to pass, and the other frequency bands of the radio frequency signals are inhibited from passing. The choice of filter 14 is well known to those skilled in the art. It can be selected according to the design need and is not described in detail. In this example, the filters 14 in the two signal transceiving circuits may be individually made as filter chips or filter devices mounted on a circuit board, or the two filters 14 may be integrated into one filter chip.

The filter 14 is commonly added in each external antenna link, so that the phenomenon of overlarge noise of the transmitted radio frequency signal can be avoided, but when the number of the external antenna links is large, the excessive filters 14 need to be accessed, and unnecessary resource waste is caused. Therefore, according to the scheme, the filter 14 is connected between the radio frequency transceiving switch 12 and the antenna switch selection module 13 in the radio frequency front-end module 1, when signal transmission or signal reception needs to be performed in a multi-antenna working mode, multiple antenna links can be directly connected externally, and a filter 14 does not need to be added in each external antenna link, so that the uplink 2 x2 MIMO mode and the downlink 4 x 4 MIMO mode can be realized. The signal is directly transmitted or received through a plurality of external antenna links, and the multi-path transmission and reception of radio frequency signals are realized. When the radio-frequency signals are transmitted, the radio-frequency signals are amplified by the power amplifier, filtered by the filter 14 and transmitted out through the antenna link, and when the radio-frequency signals are received, the signals received by the antenna link are filtered by the filter 14 and amplified by the low-noise amplifier in the radio-frequency power amplification module, or filtered by the external filter and amplified by the external low-noise amplifier. The following describes the transceiving process of the radio frequency signal. The antenna switch selection module 13 includes a plurality of antenna switches, a plurality of main antenna switch ports, a plurality of peripheral antenna ports, and a plurality of external low-noise amplification ports; for example, in this example, the number of main antenna switch ports is set to 2, the number of peripheral antenna ports is set to 3, and the number of external low-noise amplification ports is set to 3. The antenna switch is arranged among the filter 14, the 2 main antenna switch ports, the 3 peripheral antenna ports and the 3 external low-noise amplification ports and is used for realizing the gating of the filter 14, the two main antenna switch ports, the 3 peripheral antenna ports and the 3 external low-noise amplification ports. In this example, the antenna switch selection module 13 is used to gate the antenna connected to the port or the external low noise amplifier 111. In combination with the filter 14 and the rf transceiver switch 12, the antenna is selected to receive and transmit rf signals in a specific frequency band. In this example, the two main antenna switch ports can be used to install two main antennas, and 3 peripheral antenna ports can be used to install 2-3 peripheral antennas, but only 2 peripheral antennas are generally installed, and one of the peripheral antenna ports is connected to the air, and no peripheral antenna is installed. 3 external low noise amplifier ports are used to install 3 peripheral low noise amplifiers. Through the mode, the transmission and the reception of the multi-antenna can be realized. The operation principle will be explained in detail later.

As shown in fig. 4 below, in particular, for the sake of further clarity, in this example, the two signal transceiver circuits are respectively referred to as a first signal transceiver circuit and a second signal transceiver circuit; the first signal transceiver circuit and the second signal transceiver circuit are both connected to the antenna switch selection module 13. The first and second signal transceiver circuits are identical in nature, except for differences in their nomenclature.

The first signal transceiver circuit comprises a first radio frequency power amplifier module 11a, a first radio frequency transceiver switch 12a and a first filter 14a which are sequentially arranged;

the first radio frequency power amplifier module 11a comprises a first low noise amplifier 111a, a first power amplifier 112a and a first matching network 113 a; a first matching network 113a is connected in series between the first power amplifier 112a and the first rf transceiving switch 12 a; the low noise amplifier is used for receiving the radio frequency signal transmitted from the first radio frequency transceiving switch 12a, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving module 2; the first power amplifier 112a is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the radio frequency signal to the first matching network 113a, where the first matching network 113a is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the first radio frequency transceiver switch 12 a;

in this example, the output end of the first low noise amplifier 111a on the first rf power amplifier module 11a is named as a first rf receiving port RX1, and the first rf receiving port RX1 is connected to the rf transceiver module 2, and transmits the rf signal received and amplified in the first rf power amplifier module 11a to the rf transceiver module 2 for processing.

In this example, an input end of a first power amplifier 112a on the first radio frequency power amplifier module 11a is named as a first radio frequency transmitting port TX1, the first radio frequency receiving and transmitting port TX1 is connected to the radio frequency transceiver module 2, and receives a radio frequency signal transmitted in the radio frequency transceiver module 2, and the radio frequency signal is amplified by the first power amplifier 112a and then transmitted to the first radio frequency transceiver switch 12a by the first matching network 113 a.

The first filter 14a is disposed between the antenna switch selection module 13 and the first radio frequency transceiver switch 12a, and is configured to filter the radio frequency signal amplified by the first power amplifier 112a and transmit the filtered radio frequency signal to the antenna switch selection module 13, or filter the radio frequency signal received from the antenna switch selection module 13 and transmit the filtered radio frequency signal to the first low noise amplifier 111 a.

The second signal transceiver circuit comprises a second radio frequency power amplifier module 11b, a second radio frequency transceiver switch 12b and a second filter 14b which are sequentially arranged;

the second radio frequency power amplifier module 11b comprises a second low noise amplifier 111b, a second power amplifier 112b and a second matching network 113 b; a second matching network 113b is connected in series between the second power amplifier 112b and the second rf transceiving switch 12 b; the low noise amplifier is used for receiving the radio frequency signal transmitted from the second radio frequency transceiving switch 12b, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving module 2; the second power amplifier 112b is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the radio frequency signal to the second matching network 113b, where the second matching network 113b is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the second radio frequency transceiver switch 12 b;

the second filter 14b is disposed between the antenna switch selection module 13 and the second radio frequency transceiver switch 12b, and is configured to filter the radio frequency signal amplified by the second power amplifier 112b and transmit the filtered radio frequency signal to the antenna switch selection module 13, or filter the radio frequency signal received from the antenna switch selection module 13 and transmit the filtered radio frequency signal to the second low noise amplifier 111 b.

In this example, the output end of the second low noise amplifier 111b on the second rf power amplifier module 11b is named as a second rf receiving port RX2, and the second rf receiving port RX2 is connected to the rf transceiver module 2, and transmits the rf signal received and amplified in the second rf power amplifier module 11b to the rf transceiver module 2 for processing.

In this example, the input end of the second power amplifier 112b on the second rf power amplifier module 11b is named as a second rf transmitting port TX2, and the second rf transmitting port TX2 is connected to the rf transceiver module 2, and receives the rf signal transmitted in the rf transceiver module 2, and transmits the rf signal to the second rf transceiver switch 12b through the second matching network 113b after being amplified by the second power amplifier 112 b.

As shown in fig. 5, the antenna switch includes a main antenna switch, a peripheral antenna selection switch, and a peripheral low noise amplification switch;

the 2 main antenna switch ports include a first trunk antenna port ANT1 and a second trunk antenna port ANT 2; the 3 peripheral antenna ports include a first peripheral antenna port AUX1, a second peripheral antenna port AUX2, and a third peripheral antenna port AUX 3; the 3 external low-noise amplification ports comprise a first external low-noise amplification port L1, a second external low-noise amplification port L2 and a third external low-noise amplification port L3;

the first filter 14a is connected to a first trunk antenna port ANT1 through a first trunk antenna switch K11, and the third trunk antenna switch K21 is connected to a second trunk antenna port ANT 2; the second filter 14b is connected to the first trunk antenna port ANT1 through a second trunk antenna switch K12, and the fourth trunk antenna switch K22 is connected to the second trunk antenna port ANT 2.

The peripheral switches include a first peripheral selection switch K31 and a second peripheral selection switch K32; the first peripheral select switch K31 and the second peripheral select switch K32 each include a first terminal and a second terminal;

the peripheral antenna selection switch comprises a first peripheral antenna selection switch K41, a second peripheral antenna selection switch K42 and a third peripheral antenna selection switch K43;

the peripheral low-noise amplification switch comprises a first peripheral low-noise amplification switch K51, a second peripheral low-noise amplification switch K52 and a third peripheral low-noise amplification switch K53;

a first terminal of the first peripheral select switch K31 is connected to the first filter 14 a; a first terminal of the second peripheral selection switch K32 is connected to the second filter 14 b; a second terminal of the first peripheral select switch K31 and a second terminal of the second peripheral select switch K32 are connected in common;

the first peripheral antenna selection switch K41 and the first peripheral low noise amplification switch K51 are connected in series between the second ends of the first peripheral selection switch K31 and the second peripheral selection switch K32 and the first external low noise amplification port L1; the first peripheral antenna port AUX1 is led out between the first peripheral antenna selection switch K41 and the first peripheral low-noise amplification switch K51;

the second peripheral antenna selection switch K42 and the second peripheral low noise amplification switch K52 are connected in series between the second terminals of the first peripheral selection switch K31 and the second peripheral selection switch K32 and the second external low noise amplification port L2; the second peripheral antenna port AUX2 is led out between the second peripheral antenna selection switch K42 and the second peripheral low-noise amplification switch K52;

the third peripheral antenna selection switch K43 and the third peripheral low noise amplification switch K53 are connected in series between the second ends of the first peripheral selection switch K31 and the second peripheral selection switch K32 and the third external low noise amplification port L3; the third peripheral antenna port AUX3 is led out between the third peripheral antenna selection switch K43 and the third peripheral low-noise amplification switch K53.

In this example, the main antenna switch, the peripheral antenna selection switch and the peripheral low-noise amplification switch are designed, and the receiving and transmitting links are gated by turning on and off the switches.

In this example, the transceiver link refers to a signal channel between the first rf receiving port RX1, the second rf receiving port RX2, the first rf transmitting port TX1, the second rf transmitting port TX2, the first main antenna port ANT1, the second main antenna port ANT2, the first peripheral antenna port AUX1, the second peripheral antenna port AUX2, the first external low-noise amplifying port L1, the second external low-noise amplifying port L2, and the third external low-noise amplifying port L3, so that multiple selections of receiving and transmitting frequency signals can be implemented.

The following description of the antenna link module 3 and its connection relationship with the rf front-end module 1 is as follows: as shown in fig. 6, the antenna link module 3 includes a main antenna link 3a and a peripheral antenna link 3 b;

the backbone antenna link 3a comprises a first backbone antenna 31 and a second backbone antenna 32; the first trunk antenna 31 is connected to the first trunk antenna port ANT 1; the second trunk antenna 32 is connected to the second trunk antenna port ANT 2;

the peripheral antenna chain 3b includes a first peripheral antenna 33, a second peripheral antenna 34, a first peripheral low noise amplifier 35, a second peripheral low noise amplifier 36, and a third peripheral low noise amplifier 37;

the first peripheral antenna 33 is connected to the first peripheral antenna port AUX1, and the second peripheral antenna 34 is connected to the second peripheral antenna port AUX 2; the first peripheral low-noise amplifier 35 is connected to the first external low-noise amplification port L1, the second peripheral low-noise amplifier 36 is connected to the second external low-noise amplification port L2, and the third peripheral low-noise amplifier 37 is connected to the third external low-noise amplification port L3.

In this embodiment, the first main antenna 31, the second main antenna 32, the first peripheral antenna 33, and the second peripheral antenna 34 are SRS (Sounding Reference Signal) antennas. By adopting the SRS antenna, the radio frequency signal can be sent in turn, and the SRS sending in turn refers to which physical antenna the communication terminal 1000 sends SRS information. The terminal transmits SRS information is one of the ways for the base station to probe the terminal position and channel quality. The more the number of antennas capable of participating in transmitting the reference signal is, the more accurate the channel estimation is, and the higher the rate can be obtained; if the antenna is only used for transmitting, other antenna information is lost, the antenna is not fully utilized, and the highest rate is difficult to obtain. The rf front-end module 1 in this example can complete signal transmission and reception of multiple frequency bands on 4 antennas. For example, in this example, the first signal transceiver circuit can receive and transmit a radio frequency signal in the N77 frequency band, and the second signal transceiver circuit can receive and transmit a radio frequency signal in the N79 frequency band. And can select among the 4 antennas described above. It should be noted that, the radio frequency signal that can be transmitted/received in the present scheme may be a signal in any other frequency band besides the n 77/n 79 frequency band, and the present scheme does not make any limitation on the frequency band of the transmitted/received radio frequency signal.

As shown in fig. 7, the first external filter 351 is further disposed between the first peripheral low noise amplifier 35 and the first external low noise amplification port L1; the second external filter 352 is further disposed between the second peripheral low noise amplifier 36 and the second external low noise amplification port L2, and the third external filter 353 is further disposed between the third peripheral low noise amplifier 37 and the third external low noise amplification port L3. Through the three external filters, the radio frequency signals received from the antennas can be further filtered. The receive chain of radio frequency signals is increased.

In this example, the multi-frequency band signal can be transmitted and received in turn through the external main antenna link 3a and the external antenna link 3 b. For example, for radio frequency signals, after the radio frequency signals are input through the first radio frequency transmission port TX1, the radio frequency signals are amplified by the first power amplifier 112a, pass through the first radio frequency transceiving switch 12a after passing through the first matching network 113a, and then pass through the first filter 14a for filtering processing, and are selected to be transmitted through the first main antenna 31, the second main antenna 32, the first peripheral antenna 33, or the second peripheral antenna 34 by gating of a specific switch inside the antenna switch selection module 13.

Or, after the radio frequency signal is input through the second radio frequency transmission port TX2, the radio frequency signal is amplified by the second power amplifier 112b, passes through the second matching network 113b, passes through the second radio frequency transceiving switch 12b, is filtered by the second filter 14b, and is selectively transmitted through the first main antenna 31, the second main antenna 32, the first peripheral antenna 33, or the second peripheral antenna 34 by gating a specific switch inside the antenna switch selection module 13.

Similarly, the antenna switch selection module 13 may select to receive the radio frequency signal through the first main antenna 31, the second main antenna 32, the first peripheral antenna 33, or the second peripheral antenna 34 by gating a specific switch inside, and then the radio frequency signal received by the antenna passes through the first filter 14a, the first radio frequency transceiver switch 12a, and then the first low noise amplifier 111a, and is transmitted to the radio frequency transceiver module 2 through the first radio frequency receiving port RX1 after filtering and amplifying the radio frequency signal received by the antenna.

Or, it may select to receive the radio frequency signal through the first main antenna 31, the second main antenna 32, the first peripheral antenna 33, or the second peripheral antenna 34 by gating a specific switch inside the antenna switch selection module 13, then pass through the second filter 14b, the second radio frequency transceiving switch 12b, then pass through the second low noise amplifier 111b, filter and amplify the radio frequency signal received by the above antennas, and then transmit the radio frequency signal to the radio frequency transceiving module 2 through the first radio frequency receiving port RX 2.

In this example, the third peripheral antenna port AUX3 is connected to the air, and the peripheral antenna is not connected to the air, so that the third peripheral low noise amplifier 37 can be used in combination with the first main antenna 31 and the second main antenna 32 to realize the radio frequency signal reception of the first main antenna 31 and the second main antenna 32.

For example, by gating the third peripheral low noise amplifier switch K53, the third peripheral antenna selection switch K43, the first peripheral selection switch K31, and the first trunk antenna switch K11 (or the third trunk antenna switch K21), the first trunk antenna 31 or the second trunk antenna 32 can be connected to the third external filter 353 and the third peripheral low noise amplifier 37; the radio frequency signals collected by the first main antenna 31 and the second main antenna 32 are filtered by the third external filter 353, amplified by the third peripheral low noise amplifier 37, and then directly output to the radio frequency transceiver module 2. Similarly, the first main antenna 31 or the second main antenna 32 may be connected to the third external filter 353 and the third peripheral low noise amplifier 37 by gating the third peripheral low noise amplifier switch K53, the third peripheral antenna selection switch K43, the second peripheral selection switch K32, and the second main antenna switch K21 (or the fourth main antenna switch K22); the radio frequency signal collected by the first main antenna 31 or the second main antenna 32 is filtered by the third external filter 353, amplified by the third peripheral low noise amplifier 37, and then directly output to the radio frequency transceiver module 2. In this way, it may add additional signal receiving chains.

Certainly, a path may also be formed between the first peripheral antenna 33 and the first external filter 351 and between the first peripheral antenna 33 and the first peripheral low-noise amplifier 35 by directly gating the first peripheral low-noise amplification switch K51, and the radio frequency signal received by the first peripheral antenna 33 is filtered by the first external filter 351, and is directly sent to the radio frequency transceiver module 2 after being amplified by the first peripheral low-noise amplifier 35. Similarly, a path can be formed between the second peripheral antenna 34, the second external filter 361 and the first peripheral low-noise amplifier 36 by directly gating the second peripheral low-noise amplification switch K52, and the radio-frequency signal received by the second peripheral antenna 34 is filtered by the second external filter 361, amplified by the first peripheral low-noise amplifier 36 and then directly transmitted to the radio-frequency transceiver module 2. The mode can increase the channel for receiving signals without passing through an internal trunk antenna and other switches, and the channel can also shorten the path for transmitting radio frequency signals.

The selection of each antenna, and the logical control of the transmission and reception will be further explained below.

Hereinafter, the operation of the present application will be specifically explained with reference to fig. 6 and 7. Through the selection of the first rf transceiving switch 12a and the second rf transceiving switch 12b and the gating of each antenna in the antenna switch selection module 13, a plurality of transceiving links are formed, and the reception or transmission of each rf signal is realized.

Receiving by a receiving link:

receiving link 1: by gating the first trunk antenna switch K11 and selectively turning on the first low noise amplifier 111a by the first rf transceiving switch 12a, a rf signal receiving link between the first trunk antenna 31, the first trunk antenna port ANT1, the first trunk antenna switch K11, the first filter 14a, the first rf transceiving switch 12a and the first low noise amplifier 111a can be formed.

Receiving link 2: by gating the third trunk antenna switch K21 and selectively turning on the first low noise amplifier 111a by the first rf transceiving switch 12a, a rf signal receiving link between the second trunk antenna 32, the second trunk antenna port ANT2, the third trunk antenna switch K21, the first filter 14a, the first rf transceiving switch 12a, and the first low noise amplifier 111a can be formed.

Receiving chain 3: by gating the second main antenna switch K12 and selectively turning on the second low noise amplifier 111b by the second rf transceiving switch 12b, a rf signal receiving link between the first main antenna 31, the first main antenna port ANT1, the first main antenna switch K11, the second filter 14b, the second rf transceiving switch 12b and the second low noise amplifier 111b can be formed.

And the receiving link 4: by gating the fourth main antenna switch K22 and selectively turning on the second low noise amplifier 111b by the second rf transceiving switch 12b, a rf signal receiving link between the second main antenna 32, the second main antenna port ANT2, the fourth main antenna switch K22, the second filter 14b, the second rf transceiving switch 12b and the second low noise amplifier 111b can be formed.

The receiving chain 5: the first low noise amplifier 111a is selectively turned on by gating the first peripheral selection switch K31, the first peripheral antenna selection switch K41, and the first radio frequency transceiving switch 12 a; a radio frequency signal receiving chain among the first peripheral antenna 33, the first peripheral antenna port AUX1, the first peripheral antenna selection switch K41, the first peripheral selection switch K31, the first filter 14a, the first radio frequency transceiving switch 12a, and the first low noise amplifier 111a may be formed.

The receiving chain 6: the first low noise amplifier 111a is selectively turned on by gating the first peripheral selection switch K31, the second peripheral antenna selection switch K42, and the first rf transceiving switch 12 a; a radio frequency signal receiving chain can be formed among the second peripheral antenna 34, the second peripheral antenna port AUX2, the second peripheral antenna selection switch K42, the first peripheral selection switch K31, the first filter 14a, the first radio frequency transceiving switch 12a, and the first low noise amplifier 111 a.

The receiving chain 7: the second low noise amplifier 111b is selectively turned on by gating the second peripheral selection switch K32, the first peripheral antenna selection switch K41, and the second rf transceiving switch 12 b; a radio frequency signal receiving chain can be formed among the first peripheral antenna 33, the first peripheral antenna port AUX1, the first peripheral antenna selection switch K41, the second peripheral selection switch K32, the second filter 14b, the second radio frequency transceiving switch 12b, and the second low noise amplifier 111 b.

The receiving chain 8: the second low noise amplifier 111b is selectively turned on by gating the second peripheral selection switch K32, the second peripheral antenna selection switch K42, and the second rf transceiving switch 12 b; a radio frequency signal receiving chain can be formed among the second peripheral antenna 34, the second peripheral antenna port AUX2, the second peripheral antenna selection switch K42, the second peripheral selection switch K32, the second filter 14b, the second radio frequency transceiving switch 12b, and the second low noise amplifier 111 b.

The receiving chain 9: by gating the third peripheral low-noise amplification switch K53, the third peripheral antenna selection switch K43, the first peripheral selection switch K31, and the first trunk antenna switch K11, the first trunk antenna 31 can be connected to the third external filter 353 and the third peripheral low-noise amplifier 37, and the radio-frequency signal collected by the first trunk antenna 31 is filtered by the third external filter 353, amplified by the third peripheral low-noise amplifier 37, and then directly output to the radio-frequency transceiver module 2.

The receiving chain 10: by gating the third peripheral low-noise amplification switch K53, the third peripheral antenna selection switch K43, the first peripheral selection switch K31, and the third main antenna switch K21, the second main antenna 32 can be connected to the third external filter 353 and the third peripheral low-noise amplifier 37, and the radio-frequency signal collected by the second main antenna 32 is filtered by the third external filter 353, amplified by the third peripheral low-noise amplifier 37, and then directly output to the radio-frequency transceiver module 2.

The receiving link 11: the first trunk antenna 31 can be connected to the third external filter 353 and the third peripheral low noise amplifier 37 by gating the third peripheral low noise amplification switch K53, the third peripheral antenna selection switch K43, the second peripheral selection switch K32 and the second trunk antenna switch K12; the radio frequency signal collected by the first main antenna 31 is filtered by the third external filter 353, amplified by the third peripheral low noise amplifier 37, and then directly output to the radio frequency transceiver module 2.

The receiving chain 12: the second main antenna 32 can be communicated with the third external filter 353 and the third peripheral low noise amplifier 37 by gating the third peripheral low noise amplification switch K53, the third peripheral antenna selection switch K43, the second peripheral selection switch K32 and the fourth main antenna switch K22; the radio frequency signal collected by the second main antenna 32 is filtered by the third external filter 353, amplified by the third peripheral low noise amplifier 37, and then directly output to the radio frequency transceiver module 2.

The receiving chain 13: a path can be formed between the first peripheral antenna 33 and the first external filter 351 as well as between the first peripheral antenna 33 and the first peripheral low-noise amplifier 35 by directly gating the first peripheral low-noise amplification switch K51, and the radio-frequency signal received by the first peripheral antenna 33 is filtered by the first external filter 351 and is directly transmitted to the radio-frequency transceiving module 2 after being amplified by the first peripheral low-noise amplifier 35.

The receiving chain 14: a path can be formed between the second peripheral antenna 34, the second external filter 361 and the first peripheral low-noise amplifier 36 by directly gating the second peripheral low-noise amplification switch K52, and the radio-frequency signal received by the second peripheral antenna 34 is filtered by the second external filter 361, amplified by the first peripheral low-noise amplifier 36 and then directly transmitted to the radio-frequency transceiver module 2.

The receiving chain shows that 4 antennas can be used as receiving antennas of radio frequency signals, and the receiving chain can be filtered by a first filter 14a in the radio frequency front-end module 1 through the antennas, and then the first low noise amplifier 111a amplifies the signals and outputs the amplified signals to the radio frequency transceiver module 2; or filtered by the second filter 14b in the rf front-end module 1, amplified by the second low noise amplifier 111b, and finally transmitted to the rf transceiver module 2 from the first rf receiving port RX1 or the second rf receiving port RX 2. Or, the radio frequency signals received by the first main antenna and the second main antenna may be filtered by the third external filter 353, amplified by the third peripheral low noise amplifier 37, and then directly output to the radio frequency transceiver module 2. Or the radio frequency signal received by the first peripheral antenna is directly filtered by the first external filter 351, amplified by the first peripheral low noise amplifier 35, and then directly transmitted to the radio frequency transceiver module 2. Or the radio frequency signal received by the second peripheral antenna 34 is directly filtered by the second external filter 361, amplified by the first peripheral low noise amplifier 36 and then directly transmitted to the radio frequency transceiver module 2. Up to 20 receiving chains for receiving radio frequency signals may be used, and it should be understood that the above 14 receiving chains are only exemplary, and other transmission paths of the receiving chains may also be supported in the embodiment of the present invention.

The following is an introduction to the transmit chain:

the transmission link 1: by gating the first trunk antenna switch K11 and selectively turning on the first power amplifier 112a by the first rf transceiving switch 12a, a rf signal transmission link is formed between the first signal transmission port, the first power amplifier 112a, the first matching network 113a, the first rf transceiving switch 12a, the first filter 14a, the first trunk antenna switch K11, the first trunk antenna port ANT1, and the first trunk antenna 31.

And a transmission link 2: by gating the third trunk antenna switch K21 and selectively turning on the first power amplifier 112a by the first rf transceiving switch 12a, a rf signal transmission link is formed among the first signal transmission port, the first power amplifier 112a, the first matching network 113a, the first rf transceiving switch 12a, the first filter 14a, the third trunk antenna switch K21, the second trunk antenna port ANT2, and the second trunk antenna 32.

The transmission link 3: by gating the second trunk antenna switch K12 and selectively turning on the second power amplifier 112b by the second rf transceiving switch 12b, a rf signal transmission link is formed between the second signal transmission port, the second power amplifier 112b, the second matching network 113b, the second rf transceiving switch 12b, the second filter 14b, the second trunk antenna switch K12, the first trunk antenna port ANT1, and the first trunk antenna 31.

The transmission link 4: by gating the fourth trunk antenna switch K22 and selectively turning on the second power amplifier 112b by the second rf transceiving switch 12b, a rf signal transmission link is formed between the second signal transmission port, the second power amplifier 112b, the second matching network 113b, the second rf transceiving switch 12b, the second filter 14b, the fourth trunk antenna switch K22, the second trunk antenna port ANT2, and the second trunk antenna 32.

The transmission link 5: by gating the first peripheral selection switch K31, the first peripheral antenna switch, and the first rf transceiving switch 12a to selectively turn on the first power amplifier 112a, a rf signal transmission link among the first signal transmission port, the first power amplifier 112a, the first matching network 113a, the first rf transceiving switch 12a, the first filter 14a, the first peripheral selection switch K31, the first peripheral antenna switch, the first peripheral antenna port AUX1, and the first peripheral antenna 33 is formed.

The transmission link 6: by gating the first peripheral selection switch K31, the second peripheral antenna switch, and the first rf transceiving switch 12a to selectively turn on the first power amplifier 112a, an rf signal transmission link is formed among the first signal transmission port, the first power amplifier 112a, the first matching network 113a, the first rf transceiving switch 12a, the first filter 14a, the first peripheral selection switch K31, the second peripheral antenna switch, the second peripheral antenna port AUX2, and the second peripheral antenna 34.

The transmission link 7: by gating the second peripheral selection switch K32, the first peripheral antenna switch, and the second rf transceiving switch 12b to selectively turn on the second power amplifier 112b, a rf signal transmission link is formed among the second signal transmission port, the second power amplifier 112b, the second matching network 113b, the second rf transceiving switch 12b, the second filter 14b, the second peripheral selection switch K32, the first peripheral antenna switch, the first peripheral antenna port AUX1, and the first peripheral antenna 33.

The transmission link 8: by gating the second peripheral selection switch K32, the second peripheral antenna switch, and the second rf transceiving switch 12b to selectively turn on the second power amplifier 112b, a rf signal transmission link is formed among the second signal transmission port, the second power amplifier 112b, the second matching network 113b, the second rf transceiving switch 12b, the second filter 14b, the second peripheral selection switch K32, the second peripheral antenna switch, the second peripheral antenna port AUX2, and the second peripheral antenna 34.

The above-mentioned receiving and transmitting circuit shows that 4 antennas can be used as transmitting antennas of radio frequency signals, and the radio frequency signals are transmitted into the radio frequency front end module 1 through the above-mentioned first radio frequency transmitting port TX1 or second radio frequency transmitting port TX2, and finally transmitted from the above-mentioned 4 antennas after being processed by amplification, impedance matching, filtering, etc.

As a further preferable mode, as shown in fig. 8, in this example, the rf front-end module 1 includes a first rf front-end module 1a and a second rf front-end module 1b which are multiplexed. The first radio frequency front end module 1a and the second radio frequency front end module 1b are both connected to the same antenna link module 3, and share one set of antenna link module 3. In this embodiment, one transmission path in the first rf front-end module 1a only supports amplification of signals of one specific frequency band (e.g., N77 or N79). Therefore, by multiplexing the rf front-end circuit, two transmission paths may be used to transmit signals of a certain set frequency band, for example, for the frequency band N77, one transmission path in the first rf front-end module 1a and one transmission path in the second rf front-end module 1 may be selected at the same time, so as to implement 2 TNR.

The communication terminal 1000 provided in this embodiment optimizes the rf front end module 1 on the internal antenna device 100, and can operate in a multi-antenna operating mode through two signal transceiving circuits and the antenna switch selection module 13, and implement receiving or sending of rf signals through the rf transceiving switch, and can switch through the antenna switch selection module 13 related ports to implement connection between the external main antenna link 3a and the external peripheral antenna link 3b, thereby implementing selection of multiple antenna links, and the rf signals of each antenna link are selectable. After the radio frequency signal passes through the transceiving path, the radio frequency signal can be accessed to a signal of any frequency band through a corresponding antenna port by selecting an antenna switch in the antenna switch selection module 13. The multi-channel transmission and multi-channel reception of the radio frequency signals are realized, and meanwhile, different frequency band signals needing to be accessed can be flexibly controlled and adjusted. The circuit structure of the scheme is simple, different frequency band signals needing to be accessed can be flexibly controlled and adjusted, the debugging freedom degree of the scheme is increased, and the performance of the radio frequency front-end module 1 is optimized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A radio frequency front end module is characterized by comprising two paths of signal transceiving circuits and an antenna switch selection module; the two signal transceiving circuits are connected with the antenna switch selection module;

2. The rf front-end module of claim 1, wherein a matching network is connected in series between the power amplifier and the rf transceiving switch;

the power amplifier in the radio frequency power amplifier module is used for receiving the radio frequency signal sent by the radio frequency transceiver module, amplifying the radio frequency signal and then outputting the radio frequency signal to the matching network, and the matching network is used for performing impedance matching on the amplified radio frequency signal and then outputting the radio frequency signal to the radio frequency transceiver switch.

3. The rf front-end module of claim 2, wherein the first rf power amplifier module comprises a first low noise amplifier, a first power amplifier, and a first matching network; a first matching network is connected in series between the first power amplifier and the first radio frequency transceiving switch; the low noise amplifier is used for receiving the radio frequency signal transmitted from the first radio frequency transceiving switch, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving module; the first power amplifier is used for receiving a radio frequency signal sent by the radio frequency transceiving module, amplifying the radio frequency signal and outputting the radio frequency signal to the first matching network, and the first matching network is used for performing impedance matching on the amplified radio frequency signal and outputting the radio frequency signal to the first radio frequency transceiving switch;

the first filter is arranged between the antenna switch selection module and the first radio frequency transceiving switch and used for filtering the radio frequency signals amplified by the first power amplifier and then transmitting the radio frequency signals to the antenna switch selection module or filtering the radio frequency signals received from the antenna switch selection module and then transmitting the radio frequency signals to the first low noise amplifier.

4. The rf front-end module of claim 2, wherein the second rf power amplifier module comprises a second low noise amplifier, a second power amplifier, and a second matching network; a second matching network is connected in series between the second power amplifier and the second radio frequency transceiving switch; the low-noise amplifier is used for receiving the radio-frequency signal transmitted from the second radio-frequency transceiving switch, amplifying the radio-frequency signal and outputting the amplified radio-frequency signal to the radio-frequency transceiving module; the second power amplifier is used for receiving the radio-frequency signal sent by the radio-frequency transceiving module, amplifying the radio-frequency signal and outputting the radio-frequency signal to the second matching network, and the second matching network is used for performing impedance matching on the amplified radio-frequency signal and outputting the radio-frequency signal to the second radio-frequency transceiving switch;

the second filter is arranged between the antenna switch selection module and the second radio frequency transceiving switch and used for filtering the radio frequency signals amplified by the second power amplifier and then transmitting the radio frequency signals to the antenna switch selection module or filtering the radio frequency signals received from the antenna switch selection module and then transmitting the radio frequency signals to the second low noise amplifier.

5. The RF front-end module of claim 1, wherein the RF front-end module comprises a multiplexed first RF front-end module and a second RF front-end module.

6. An antenna device comprises a baseband module, a radio frequency transceiver module, a radio frequency front end module and an antenna link module; the RF front-end module according to any one of claims 1 to 5.

7. The antenna device according to claim 6, wherein the antenna link module comprises a main antenna link and a peripheral antenna link;

the main antenna link comprises a first main antenna and a second main antenna; the first trunk antenna is connected to the first trunk antenna port; the second main antenna is connected to the port of the second main antenna;

the peripheral antenna link comprises a first peripheral antenna, a second peripheral antenna, a first peripheral low noise amplifier, a second peripheral low noise amplifier and a third peripheral low noise amplifier;

the first peripheral antenna is connected to the first peripheral antenna port, and the second peripheral antenna is connected to the second peripheral antenna port; the first peripheral low-noise amplifier is connected to the first external low-noise amplification port, the second peripheral low-noise amplifier is connected to the second external low-noise amplification port, and the third peripheral low-noise amplifier is connected to the third external low-noise amplification port.

8. The antenna device according to claim 7, wherein the first external filter is further disposed between the first peripheral low noise amplifier and the first external low noise amplification port; the second external filter is arranged between the second peripheral low-noise amplifier and the second external low-noise amplification port, and the third external filter is arranged between the third peripheral low-noise amplifier and the third external low-noise amplification port.

9. A communication terminal, characterized in that it comprises an antenna arrangement according to any of claims 6-8.