CN111277295A - A radio frequency front-end circuit and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses radio frequency front-end circuit and electronic equipment, this radio frequency front-end circuit includes transmitting module, single-pole multi-throw switch, a plurality of receiving module and many antennas, wherein: the transmitting module is connected with the input end of the single-pole multi-throw switch, and a plurality of output ends of the single-pole multi-throw switch are respectively connected with the plurality of antennas in a one-to-one correspondence manner; the plurality of receiving modules are respectively connected with the plurality of antennas in a one-to-one corresponding mode. By the method, one or more signal transmitting paths and a plurality of signal receiving paths in the communication network can be realized based on one single-pole multi-throw switch, and the signal transmitting paths and the signal receiving paths formed by the structure can improve element difference loss caused by different elements, increase flexibility of circuit layout, reduce interference among radio frequency signals and reduce path loss.

Description

A radio frequency front-end circuit and electronic equipment

technical field

The present application relates to the field of communication technologies, and in particular, to a radio frequency front-end circuit and electronic equipment.

Background technique

With the popularization of mobile smart terminals, users' demand for data traffic is increasing. For example, the peak rate of 5G NR can reach 20Gbps. The increase in rate requires 5G NR to have 4*4MIMO capabilities. The operating frequencies and bandwidths currently required for electronic equipment are getting higher and higher, which leads to the challenge of the limits of components.

Usually, the functions of one transmit channel and four receive channels in the RF front-end circuit can be implemented by multiple three-pole three-throw switches. However, in the above method, the electronic equipment will directly affect the path loss for the layout and wiring, and the three-pole three-throw switch will make the isolation between the antennas poor, which may lead to large interference between radio frequency signals. Therefore, it is necessary to provide an RF front-end circuit with better path loss control, better isolation, and less RF signal interference.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a radio frequency front-end circuit and electronic equipment to solve the problems of poor path loss control, poor isolation between antennas and large radio frequency signal interference in the radio frequency front-end circuit in the prior art.

In order to solve the above-mentioned technical problems, the embodiments of the present application are implemented as follows:

A radio frequency front-end circuit provided by an embodiment of the present application includes a transmitting module, a single-pole multi-throw switch, multiple receiving modules, and multiple antennas, wherein:

the transmitting module is connected to the input end of the single-pole multi-throw switch, and the multiple output ends of the single-pole multi-throw switch are respectively connected to the multiple antennas in a one-to-one correspondence manner;

The multiple receiving modules are respectively connected to the multiple antennas in a one-to-one correspondence manner.

Optionally, it also includes a plurality of single-pole double-throw switches, each of which includes one input end and two output ends;

One output terminal of each SPDT switch is connected to one output terminal of the SPDT switch in a one-to-one correspondence, and the other output terminal of each SPDT switch is in a one-to-one correspondence way to connect with one of the receiving modules.

Optionally, the plurality of antennas are a first antenna, a second antenna, a third antenna, and a fourth antenna, and the plurality of SPDT switches are a first SPDT switch, a second SPDT switch, and a third SPDT switch. Three SPDT switches and a fourth SPDT switch, the multiple receiving modules are a first receiving module, a second receiving module, a third receiving module and a fourth receiving module;

The first antenna, the second antenna and the third antenna are in a one-to-one correspondence with the input end of the first SPDT switch and the input end of the second SPDT switch, respectively. , the input end of the third SPDT switch is connected, an output end of the first SPDT switch, an output end of the second SPDT switch, and an output end of the third SPDT switch The output terminals are respectively connected with the first output terminal, the second output terminal and the third output terminal of the single-pole multi-throw switch in a one-to-one correspondence manner, and the other output terminal of the first single-pole double-throw switch, the The other output end of the second SPDT switch and the other output end of the third SPDT switch are in a one-to-one correspondence with the first receiving module, the second receiving module and the all The third receiving module is connected;

the fourth antenna is connected to the fourth output end of the single-pole multi-throw switch;

The transmitting module and the fourth receiving module are respectively connected to one output end of the fourth SPDT switch, and the input end of the fourth SPDT switch is connected to the input end of the SPDT switch.

Optionally, the first antenna, the second antenna and the third antenna are in a one-to-one correspondence with the input end of the first SPDT switch, the second SPDT switch, and the The input end of the switch and the input end of the third SPDT switch are connected, an output end of the first SPDT switch, an output end of the second SPDT switch, the third SPDT switch One output end of the throw switch is connected to the first output end, the second output end and the third output end of the single-pole multi-throw switch in a one-to-one correspondence manner, and the other The output end, the other output end of the second SPDT switch, and the other output end of the third SPDT switch are in a one-to-one correspondence with the first receiving module, the first receiving module and the first receiving module, respectively. The second receiving module is connected to the third receiving module, and the distance between the first receiving module and the first antenna is within a first predetermined threshold interval, and the second receiving module and the second antenna are The distance between them is within a second predetermined threshold interval, and the distance between the third receiving module and the third antenna is within a third predetermined threshold interval.

Optionally, the transmitting module includes a transmitter and at least one signal processing unit.

Optionally, the receiving module includes a receiver and at least one signal processing unit.

Optionally, the signal processing unit includes a filter.

Optionally, the transmitting module and the fourth receiving module are respectively connected to an output end of the fourth SPDT switch, and the input end of the fourth SPDT switch is connected to the fourth SPDT switch through at least one filter. The input terminals of the SPMT switch are connected.

Optionally, the transmitting module further includes a radio frequency power amplifier, the transmitter is connected to the input end of the radio frequency power amplifier, and the output end of the radio frequency power amplifier is connected to at least one filter.

In a second aspect, an electronic device provided by an embodiment of the present application includes the radio frequency front-end circuit provided by the foregoing embodiment.

It can be seen from the technical solutions provided by the above embodiments of the present application that the radio frequency front-end circuit of the embodiments of the present application may include a transmitting module, a single-pole multi-throw switch, a plurality of receiving modules and a plurality of antennas, wherein: the input of the transmitting module and the single-pole multi-throw switch The multiple output terminals of the SPMT switch are connected to multiple antennas in a one-to-one correspondence manner, and multiple receiving modules are respectively connected to multiple antennas in a one-to-one correspondence manner. The function of one or more signal transmission paths and multiple signal reception paths in the communication network can be realized by simply throwing the switch, and the one or more signal transmission paths and multiple signal reception paths formed by the above architecture can improve each The component loss caused by different components increases the flexibility of the circuit layout. At the same time, the single-pole multi-throw switch (such as the single-pole four-throw switch) has better isolation than other types of switches, which can reduce the interference between RF signals. interference, and can reduce path loss, thereby improving the difficulty of circuit design such as 5G NR communication network, and its performance exceeds the performance of RF cable connection.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments described in this application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic diagram of a radio frequency front-end circuit of the application;

2 is a schematic diagram of another radio frequency front-end circuit of the application;

3 is a schematic diagram of another radio frequency front-end circuit of the application;

4 is a schematic diagram of another radio frequency front-end circuit of the application;

FIG. 5 is a schematic diagram of yet another radio frequency front-end circuit of the present application.

illustration:

P-transmitting module, R, R1, R2, R3, R4-receiving module, SP-single-pole multi-throw switch, SP4T-single-pole-four-throw switch, S1-switching control terminal of single-pole-four-throw switch, T1, T2, T3, T4 - Transmitter of SPDT switch, ANT, ANT 1, ANT 2, ANT 3, ANT 4 - Antenna, SPDT, SPDT1, SPDT2, SPDT3, SPDT4 - SPDT switch, C1, C2, C3, C4 - SPDT The switching control end of the throw switch, D11, D12, D21, D22, D31, D32, D41, D42 - the receiving end of the single-pole four-throw switch, F1, F2, F3, F4 - the signal processing unit.

Detailed ways

Embodiments of the present application provide a radio frequency front-end circuit and an electronic device.

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of this application.

Example 1

An embodiment of the present application provides a radio frequency front-end circuit, and the radio frequency front-end circuit may be a radio frequency front-end circuit in an electronic device for connecting to a wireless communication network, and the wireless communication network may be a 2G wireless communication network, a 3G wireless communication network, a 4G wireless communication network A wireless communication network or a 5G wireless communication network, or a higher-level wireless communication network, etc. The radio frequency front-end circuit may include a signal transmission path and a signal reception path, wherein the number of the signal transmission path and the signal reception path may be set according to the actual situation, that is, the radio frequency front-end circuit may include one or more signal transmission paths, and One or more signal receiving paths, the signal transmitting path may include a transmitting module P, an antenna ANT, etc., and the signal receiving path may include a receiving module R, an antenna ANT, and the like. Based on this, the radio frequency front-end circuit may include a transmitting module P, a single-pole multi-throw switch SP, a plurality of receiving modules R, and a plurality of antennas ANT.

The transmitting module P may be a module capable of transmitting radio frequency signals and processing the radio frequency signals (eg, amplifying the power of the radio frequency signals, etc.). Therefore, the transmitting module P may include various components.

The receiving module R can be a module that can process the radio frequency signal received by the antenna ANT and provide it to the corresponding electronic device. The receiving module R can also include various components, which can be set according to the actual situation. The application embodiments do not limit this.

The antenna ANT may be a component for transmitting and receiving radio frequency signals, and the same antenna ANT may be used for transmitting radio frequency signals and for receiving radio frequency signals.

The single-pole multi-throw switch SP can include one input terminal S1 and multiple output terminals (T1, T2, T3, T4...), and the input terminal S1 can be connected to the multiple output terminals (T1, T2, T3, T4...). Any one of the outputs is connected to select the corresponding path.

In order to enable the RF front-end circuit to realize one or more signal transmission paths, the transmission module P can be connected to the input end of the SPMT switch SP, and the multiple output ends (T1, T2, T3, T4) of the SPMT switch SP can be connected. ...) are connected to multiple antennas ANT in a one-to-one correspondence manner, so that the output terminal selected to be connected by the SPMT switch SP is connected to the antenna ANT, thereby forming a transmission module P, SPMT switch SP. An input end, an output end of the SPMT switch SP and a signal transmission path of the antenna ANT.

In order to enable the RF front-end circuit to realize multiple signal receiving paths, multiple receiving modules R can be connected to multiple antennas ANT in a one-to-one correspondence manner, so that the multiple receiving modules R are connected to multiple antennas ANT respectively. connected to form a plurality of signal receiving paths including a receiving module R and a plurality of antennas ANT.

In order to more clearly illustrate the specific composition and structure of the above-mentioned RF front-end circuit, a specific application scenario is used as an example for description, and the details can be as follows:

In practical applications, as shown in Figure 1, for a 5G wireless communication network, the corresponding RF front-end circuit can implement 1 signal transmission path and 4 signal reception paths, or 2 signal transmission paths and 4 signal reception paths, etc. . For a 5G wireless communication network, since 4 signal receiving channels are required at the same time, the number of antennas ANT required can be 4, and the number of receiving modules R can also be 4. For the case of including 1 signal transmission channel, the transmitting module P can include 1. In addition, in order to realize that the radio frequency signal of the transmitting module P can be sent from any antenna ANT, one single-pole multi-throw switch SP can be set as a single-pole four-throw switch SP4T, which is used to connect the transmitting module P and the four antennas ANT respectively.

Based on the above components or components, the functions of one signal transmission path and four signal reception paths in the 5G wireless communication network can be realized. Specifically, for one of the signal transmission paths, the transmission module P can be connected to the single-pole four-throw switch SP4T respectively with Each of the four antennas ANT is connected. The input end S1 of the SP4T switch SP4T is connected to the output end of the transmitting module P, and each output end of the SP4T switch SP4T is connected to an antenna ANT, thereby constructing four selectable signal transmission paths. The output end of the transmitting module P can output radio frequency signals, and transmit the radio frequency signals to the input end S1 of the SP4T switch. The output end corresponding to the signal transmission path of the TX is capable of transmitting the radio frequency signal to the antenna ANT from the output end, and the antenna ANT can transmit the radio frequency signal.

As shown in Figure 1, the input terminal of the SP4T switch SP4T is S1, and the four output terminals are T1, T2, T3 and T4 respectively. T1 is connected to the antenna ANT1, T2 is connected to the antenna ANT2, and T3 is connected to the antenna ANT3. T4 is connected to the antenna ANT4, and the input terminal S1 can be connected to the output terminal T2 through the SP4T switch. In this way, the transmitting module P, the input terminal S1 of the SP4T switch SP4T, and the output of the SP4T switch SP4T can be connected in turn. The terminal T2 and the antenna ANT2 form a corresponding signal transmission path, and the radio frequency signal of the transmission module P can be transmitted by the transmission module P to the antenna ANT2 for transmission through the above signal transmission path.

It should be noted that in practical applications, not only the antenna ANT2 can be selected to transmit RF signals, but also other antennas ANT, such as antennas ANT1, ANT3 or ANT4, etc., can be selected by the single-pole four-throw switch SP4T. This embodiment of the present application does not limit this. The RF signal can be transmitted from any antenna ANT through the SP4T single-pole four-throw switch.

For the four signal receiving paths, the four receiving modules R and the four antennas ANT are connected in a one-to-one correspondence, that is, each receiving module R of the four receiving modules R can be connected to one of the four antennas ANT The antennas ANT are connected, and each of the four antennas ANT can be connected to one of the four receiving modules R, so that the four receiving modules R and the four antennas ANT form a one-to-one connection Way. Specifically, for a 5G wireless communication network, four signal receiving channels are required to receive radio frequency signals at the same time. Therefore, each receiving module R can be connected to an antenna ANT, and the antenna ANT connected to one receiving module R cannot be connected to other antennas. Receive module R. For example, the four receiving modules R can be respectively the receiving module R1, the receiving module R2, the receiving module R3 and the receiving module R4, one receiving module R can be connected to one antenna ANT, and one can be selected from the remaining receiving modules R. For a receiving module R, select an antenna ANT from the remaining antennas ANT, connect the selected receiving module R to the antenna ANT, and so on, and finally obtain four signal receiving paths. R1 is connected to the antenna ANT1, the receiving module R2 is connected to the antenna ANT2, the receiving module R3 is connected to the antenna ANT3, and the receiving module R4 is connected to the antenna ANT4, so as to realize the formation of four receiving modules R and four antennas ANT. One-to-one connection.

It should be noted that, in order to effectively control the signal receiving path, a switch can be set between each receiving module R and the antenna ANT. As shown in Figure 2, the on and off of the corresponding signal receiving path can be controlled through the switch. open.

The embodiment of the present application provides a radio frequency front-end circuit, which may include a transmitting module, a SPMT switch, multiple receiving modules and multiple antennas, wherein: the transmitting module is connected to the input end of the SPMT switch, and the multiple Each output terminal is connected to a plurality of antennas in a one-to-one correspondence manner, and a plurality of receiving modules are respectively connected to a plurality of antennas in a one-to-one correspondence manner. The function of one or more signal transmission paths and multiple signal reception paths, and the one or more signal transmission paths and multiple signal reception paths formed by the above architecture can improve the component loss caused by each different element, and The flexibility of circuit layout is increased, and at the same time, SPMT switches (such as SPFT switches) have better isolation than other types of switches, which can reduce the interference between RF signals, and can reduce path loss, and then Improve the difficulty of circuit design such as 5G NR communication network, and its performance exceeds the performance of RF cable connection.

Embodiment 2

FIG. 3 is another radio frequency front-end circuit provided by an embodiment of the present application. The radio frequency front-end circuit includes all the functional units of the radio frequency front-end circuit shown in FIG. 1 to FIG. 2 , and is improved on the basis thereof. The improvements are as follows:

In order to better control each path (including signal transmission path and signal reception path) formed by connecting the antenna ANT, a single-pole double-throw switch SPDT can be set to realize one or more signal transmission paths and multiple signal reception paths. Specifically, a plurality of SPDT switches may be set according to actual conditions, and the SPDT switch SPDT may include one input end and two output ends. The input terminal can be connected to any output terminal. One output terminal of each SPDT switch SPDT is connected to one output terminal of the SPDT switch SP in a one-to-one correspondence manner. The other output terminal is connected to a receiving module R in a one-to-one correspondence manner.

In order to illustrate the above composition structure more clearly, the following takes a specific application scenario as an example for description, which can be specifically as follows:

For the 5G wireless communication network, it is necessary to implement one signal transmission channel and four signal reception channels. Based on the above content, four SPDT switches can be set, and the input terminals of the four SPDT switches are in a one-to-one correspondence. They are respectively connected with four antennas ANT, that is, each antenna ANT can be connected to the input end of a SPDT switch, and the input end of each SPDT switch SPDT is connected to an antenna ANT, and one of the SPDT switches SPDT The output end can be connected with one output end of the SPDT switch SPDT, and the other output end of the SPDT switch SPDT can be connected with a receiving module R.

As shown in Figure 3, four SPDT switches are set in the RF front-end circuit, which are switch SPDT1, switch SPDT2, switch SPDT3 and switch SPDT4, wherein switch SPDT1 includes input terminal C1, output terminal D11 and output terminal D12 , switch SPDT2 includes input end C2, output end D21 and output end D22, switch SPDT3 includes input end C3, output end D31 and output end D32, switch SPDT4 includes input end C4, output end D41 and output end D42. The antenna ANT1 is connected to the input terminal C1, the output terminal D11 is connected to the receiving module R1, the output terminal D12 is connected to T1 in the SP4T switch, the antenna ANT2 is connected to the input terminal C2, and the output terminal D21 is connected to the receiving module R2. Connection, the output terminal D22 is connected with T2 in the SP4T switch, the antenna ANT3 is connected with the input terminal C3, the output terminal D31 is connected with the receiving module R3, the output terminal D32 is connected with T3 in the SP4T switch, the antenna ANT4 is connected with the input terminal C4, the output terminal D41 is connected with the receiving module R4, and the output terminal D42 is connected with T4 in the single-pole four-throw switch SP4T.

Regarding the structure of the radio frequency front-end circuit in FIG. 3, the structure can be further modified. The embodiment of the present application also provides an optional radio frequency front-end circuit, wherein the plurality of antennas ANT are the first antenna, the second antenna, the first antenna, the Three antennas and a fourth antenna, the multiple SPDT switches are the first SPDT switch, the second SPDT switch, the third SPDT switch and the fourth SPDT switch, and the multiple receiving modules are the first receiving module The module, the second receiving module, the third receiving module and the fourth receiving module may specifically include the following contents: the first antenna, the second antenna and the third antenna, in a one-to-one correspondence manner, are respectively connected with the first SPDT switch The input end of the second SPDT switch, the input end of the third SPDT switch are connected, one output end of the first SPDT switch SPDT, the second SPDT switch SPDT One output terminal of the SPDT switch and one output terminal of the third SPDT switch SPDT are respectively connected with the first output terminal, the second output terminal and the third output terminal of the SPDT switch in a one-to-one correspondence manner. The other output terminal of the double throw switch SPDT, the other output terminal of the second SPDT switch SPDT and the other output terminal of the third SPDT switch SPDT are in a one-to-one correspondence with the first receiving module, The second receiving module is connected to the third receiving module; the fourth antenna is connected to the fourth output terminal of the SPDT switch SP; the transmitting module P and the fourth receiving module are respectively connected to one output terminal of the fourth SPDT switch SPDT, The input terminal of the fourth SPDT switch SPDT is connected to the input terminal of the SPDT switch SP.

In implementation, three antennas ANT (ie, the first antenna, the second antenna and the third antenna) can be selected from the four antennas ANT, and a single-pole double-throw switch SPDT can be set, which can be selected from the above-mentioned four SPDT switches Any three SPDT switches (ie the first SPDT switch, the second SPDT switch and the third SPDT switch) can be selected, and the three selected antennas ANT can be connected to the selected three SPDT switches. The SPDT constitutes a one-to-one connection, that is, each antenna ANT of the three selected antennas ANT is connected to the input end of a SPDT switch, and the input end of each SPDT switch SPDT is connected to an antenna ANT. One output end of the SPDT switch SPDT can be connected to one output end of the SP4T switch SP4T, and the other output end of the SPDT switch SPDT can be connected to a receiving module R. In addition, the fourth antenna and the fourth SPDT switch SPDT can be connected in the following manner, that is, the transmitting module P can be connected to one output terminal of the fourth SPDT switch SPDT, and the fourth receiving module can be connected to the fourth SPDT The other output of the throw switch SPDT.

The RF front-end circuit shown in Figure 3 can be adjusted to obtain the RF front-end circuit shown in Figure 4. The antenna ANT1 is connected to T1 in the single-pole four-throw switch, the receiving module R1 is connected to the output terminal D11, and the transmitting module P is connected to the output The terminal D12 is connected, the input terminal C2 is connected with the input terminal S1, the antenna ANT2 is connected with the input terminal C2, the output terminal D21 is connected with the receiving module R2, the output terminal D22 is connected with T2 in the SP4T switch, and the antenna ANT3 It is connected to the input terminal C3, the output terminal D31 is connected to the receiving module R3, the output terminal D32 is connected to T3 in the SP4T switch, the antenna ANT4 is connected to the input terminal C4, and the output terminal D41 is connected to the receiving module R4. The output terminal D42 is connected with T4 in the single-pole four-throw switch SP4T.

In addition, for the transmitting module P in the above-mentioned radio frequency front-end circuit, the transmitting module P may include a variety of different functional components or functional components, and the transmitting module P can realize different functions through the above-mentioned different functional components or functional components. It can be set according to the actual situation, and the embodiment of the present application provides an optional structure of the transmitting module P, which may specifically include the following content: the transmitting module P may include a transmitter and at least one signal processing unit F.

The transmitter may be a component capable of modulating a high-frequency carrier with a useful low-frequency signal and converting it into an electromagnetic wave having a certain bandwidth at a certain center frequency and suitable for transmitting through the antenna ANT. The signal processing unit F may be a unit capable of processing video signals, and the signal processing unit F may include various types, such as filters, modems, power amplifiers, etc., which may be set according to actual conditions, which are not limited in the embodiments of the present application. .

In implementation, one or more signal processing units F can be set according to the actual situation, and then the output end of the transmitter can be connected with the signal input end of the signal processing unit F, so that the radio frequency signal output by the transmitter can be transmitted The signal processing unit F is processed to obtain the processed radio frequency signal. The processed radio frequency signal can be sent to the corresponding antenna ANT through the transmission path for transmission.

In addition, for the receiving module R in the above-mentioned radio frequency front-end circuit, the receiving module R may include a receiver and at least one signal processing unit F.

Wherein, the signal processing unit F in the receiving module R may be different from the signal processing unit F in the above-mentioned transmitting module P, and the signal processing unit may include, for example, a filter, a demodulator, a power amplifier, and the like.

In addition, the signal processing unit F in the receiving module R and the signal processing unit F in the transmitting module P may include filters.

Wherein, the filter can be used to suppress unwanted noise in the radio frequency signal (wherein the noise may include other signals, etc.) without adding any noise or interference to the required signal. The selection of the filter may be selected according to the actual situation, which is not limited in this embodiment of the present application.

In addition, for the above-mentioned RF front-end circuit in Figure 4, considering that the receiving module R and the transmitting module P may not contain filters, in order to ensure the quality of the RF signal, the input end of the SPDT switch and the SPDT switch can be connected One or more filters are set between the input terminals of SP4T, which may specifically include: the transmitting module P and the fourth receiving module R are respectively connected to one receiving terminal of the fourth SPDT switch SPDT, and the fourth SPDT switch SPDT The input terminal of the SP4T is connected to the input terminal of the single-pole four-throw switch SP4T through at least one filter.

As shown in Figure 5, the antenna ANT1 is connected to T1 in the single-pole four-throw switch, the receiving module R1 is connected to the output terminal D11, the transmitting module P is connected to the output terminal D12, and the input terminal C2 is connected to the input of one or more filters. The output end of the filter is connected with the input end S1, the antenna ANT2 is connected with the input end C2, the output end D21 is connected with the receiving module R2, the output end D22 is connected with T2 in the SP4T switch, and the antenna ANT3 is connected to the input terminal C3, the output terminal D31 is connected to the receiving module R3, the output terminal D32 is connected to T3 in the SP4T switch, the antenna ANT4 is connected to the input terminal C4, and the output terminal D41 is connected to the receiving module R4 , the output terminal D42 is connected with T4 in the single-pole four-throw switch SP4T.

In addition, the transmitting module P further includes a radio frequency power amplifier, the transmitter is connected to the input end of the radio frequency power amplifier, and the output end of the radio frequency power amplifier is connected to at least one filter.

In the implementation, in the front-end circuit of the transmitter, the power of the radio frequency signal generated by the modulation oscillator circuit is very small. Because the radio frequency signal with too low power has a small radiation range through the antenna ANT, it needs to go through a series of radio frequency signals. Signal amplification (including buffer stage, intermediate amplification stage, final power amplification stage, etc.) to obtain sufficient RF power, so that it can be fed to the antenna ANT for transmission. In order to obtain a sufficiently large RF output power, a RF power amplifier can be used. After the radio frequency signal is generated, the radio frequency signal can be amplified to a sufficient transmit power by the radio frequency power amplifier, and then transmitted by the antenna ANT.

It should be noted that, in practical applications, the radio frequency power amplifier may include a variety of different types of radio frequency power amplifiers, such as linear power amplifiers, switching power amplifiers, etc. The corresponding radio frequency power amplifier can be selected according to the actual situation. This application The embodiment does not limit this.

In practical applications, in order to improve the receiving performance of the antenna ANT, the receiving module R can be set close to the position where the antenna ANT is located. The input end of the first SPDT switch SPDT, the input end of the second SPDT switch SPDT, the input end of the third SPDT switch SPDT are connected, an output end of the first SPDT switch SPDT, the second SPDT switch One output end of the throw switch SPDT and one output end of the third SPDT switch SPDT are respectively connected with the first output end, the second output end and the third output end of the SPDT switch in a one-to-one correspondence manner, The other output terminal of the first SPDT switch SPDT, the other output terminal of the second SPDT switch SPDT, and the other output terminal of the third SPDT switch SPDT are in a one-to-one correspondence with the first The receiving module, the second receiving module and the third receiving module are connected, and the distance between the first receiving module and the first antenna is within the first predetermined threshold interval, and the distance between the second receiving module and the second antenna is within the first Within the second predetermined threshold interval, the distance between the third receiving module and the third antenna is within the third predetermined threshold interval. And, the fourth antenna is connected with the fourth output end of the SPDT switch; the transmitting module and the fourth receiving module are respectively connected with one output end of the fourth SPDT switch SPDT, and the input end of the fourth SPDT switch SPDT is connected to The input terminals of the SPMT switch are connected.

For example, based on the above-mentioned RF front-end circuit of FIG. 5 , the receiving module R3 can be set at a position where the distance from the antenna ANT3 is within the first predetermined threshold interval, and the receiving module R4 can be set at a distance from the antenna ANT4. The distance is within the range of the second predetermined threshold interval.

In implementation, based on the RF front-end circuit shown in FIG. 5, the switch SPDT2 and the receiving module R2, the switch SPDT3 and the receiving module R3, the switch SPDT4 and the receiving module R4 can be allowed to be placed close to the antenna ANT end, and the sensitivity of the receiving module R is calculated by the Formula 1)

Sen(dBm)=-174dBm/Hz+NF+10logB+SNR (1)

Among them, Sen represents the sensitivity, SNR represents the demodulation signal-to-noise ratio, NF represents the noise figure, and B represents the bandwidth of the radio frequency signal.

It can be known from the above formula (1) that if the NF is larger, the reception performance is worse. Based on this, in the embodiment of the present application, the receiving module R2 and the receiving module R4 can be placed close to the antenna ANT, respectively, so that the calculation formula (2) of the above NF can be used.

Among them, F ₁ , F ₂ , F ₃ , and F ₄ represent the noise figure of each component in the cascaded component, and G ₁ , G ₂ , and G ₃ represent the gain of each component in the cascade component.

Based on the above formula (2), it can be seen that the closer the receiving module R2 is to the ANT2, the larger the G1, the larger the G1, the smaller the NF, the better the receiving performance, and the RF cable (Radio Frequency cable, radio frequency cable) currently used can be saved. cable) mechanism, the performance has also been well improved.

The embodiment of the present application provides a radio frequency front-end circuit, which may include a transmitting module, a SPMT switch, multiple receiving modules and multiple antennas, wherein: the transmitting module is connected to the input end of the SPMT switch, and the multiple Each output terminal is connected to a plurality of antennas in a one-to-one correspondence manner, and a plurality of receiving modules are respectively connected to a plurality of antennas in a one-to-one correspondence manner. The function of one or more signal transmission paths and multiple signal reception paths, and the one or more signal transmission paths and multiple signal reception paths formed by the above architecture can improve the component loss caused by each different element, and The flexibility of circuit layout is increased, and at the same time, SPMT switches (such as SPFT switches) have better isolation than other types of switches, which can reduce the interference between RF signals, and can reduce path loss, and then Improve the difficulty of circuit design such as 5G NR communication network, and its performance exceeds the performance of RF cable connection.

Embodiment 3

The radio frequency front-end circuit provided by the embodiment of the present application is described above. Based on the same idea, the embodiment of the present application further provides an electronic device, and the electronic device includes a radio frequency front-end circuit.

The radio frequency front-end circuit includes a transmitting module P, a single-pole multi-throw switch SP, a plurality of receiving modules R and a plurality of antennas ANT, wherein:

The transmitting module P is connected to the input end of the single-pole multi-throw switch SP, and the multiple output ends of the single-pole multi-throw switch SP are respectively connected to the multiple antennas ANT in a one-to-one correspondence manner;

The multiple receiving modules R are respectively connected to the multiple antennas ANT in a one-to-one correspondence manner.

In the embodiment of the present application, the RF front-end circuit further includes a plurality of SPDT switches, and each of the SPDT switches includes one input end and two output ends;

One output terminal of each SPDT switch SPDT is connected to one output terminal of the SPDT switch SP in a one-to-one correspondence manner, and the other output terminal of each SPDT switch SPDT is connected according to the In a one-to-one correspondence manner, it is connected to one of the receiving modules R.

In the embodiment of the present application, the multiple antennas are a first antenna, a second antenna, a third antenna, and a fourth antenna, and the multiple SPDT switches are the first SPDT switch SPDT, the second SPDT switch SPDT, and the second SPDT switch. a throw switch SPDT, a third SPDT switch, and a fourth SPDT switch SPDT, the multiple receiving modules R are a first receiving module, a second receiving module, a third receiving module and a fourth receiving module;

The first antenna, the second antenna and the third antenna are in a one-to-one correspondence with the input end of the first SPDT switch SPDT and the input terminal of the second SPDT switch SPDT respectively. The input end is connected to the input end of the third SPDT switch SPDT, an output end of the first SPDT switch SPDT, an output end of the second SPDT switch SPDT, the third SPDT One output terminal of the double throw switch SPDT is connected to the first output terminal, the second output terminal and the third output terminal of the SPDT switch SP in a one-to-one correspondence manner. The other output end of the SPDT, the other output end of the second SPDT switch SPDT and the other output end of the third SPDT switch SPDT are in a one-to-one correspondence with the first the receiving module, the second receiving module and the third receiving module are connected;

the fourth antenna is connected to the fourth output end of the single-pole multi-throw switch SP;

The transmitting module P and the fourth receiving module are respectively connected to one output end of the fourth SPDT switch SPDT, and the input end of the fourth SPDT switch SPDT is connected to the output end of the SPDT switch SP. input connection.

In the embodiment of the present application, the first antenna, the second antenna and the third antenna are in a one-to-one correspondence with the input end of the first SPDT switch SPDT, the second antenna The input end of the SPDT switch SPDT is connected to the input end of the third SPDT switch SPDT, an output end of the first SPDT switch SPDT, and an output end of the second SPDT switch SPDT , An output end of the third SPDT switch SPDT is connected to the first output end, the second output end and the third output end of the SPDT switch SP in a one-to-one correspondence manner, and the said The other output end of the first SPDT switch, the other output end of the second SPDT switch SPDT, and the other output end of the third SPDT switch SPDT, in a one-to-one correspondence manner, are respectively connected to the first receiving module, the second receiving module and the third receiving module, and the distance between the first receiving module and the first antenna is within a first predetermined threshold interval, The distance between the second receiving module and the second antenna is within a second predetermined threshold interval, and the distance between the third receiving module and the third antenna is within a third predetermined threshold interval.

In this embodiment of the present application, the transmitting module P includes a transmitter and at least one signal processing unit F.

In this embodiment of the present application, the receiving module R includes a receiver and at least one signal processing unit F.

In this embodiment of the present application, the signal processing unit F includes a filter.

In the embodiment of the present application, the transmitting module P and the fourth receiving module are respectively connected to one output end of the fourth SPDT switch SPDT, and the input end of the fourth SPDT switch SPDT is connected through at least one The filter is connected to the input end of the single-pole multi-throw switch SP.

In the embodiment of the present application, the transmitting module P further includes a radio frequency power amplifier, the transmitter is connected to the input end of the radio frequency power amplifier, and the output end of the radio frequency power amplifier is connected to at least one filter.

The embodiment of the present application provides an electronic device, including the above-mentioned radio frequency front-end circuit, the radio frequency front-end circuit may include a transmitting module, a single-pole multi-throw switch, a plurality of receiving modules and a plurality of antennas, wherein: the transmitting module and the single-pole multi-throw switch are connected The input terminals are connected, the multiple output terminals of the SPMT switch are connected to multiple antennas in a one-to-one correspondence, and multiple receiving modules are connected to multiple antennas in a one-to-one correspondence. In this way, through a single-pole The multi-throw switch can realize the functions of one or more signal transmission paths and multiple signal reception paths in the communication network, and the one or more signal transmission paths and multiple signal reception paths formed by the above architecture can improve the The component loss caused by different components increases the flexibility of circuit layout. At the same time, single-pole multi-throw switches (such as single-pole four-throw switches) have better isolation than other types of switches, which can reduce the frequency of radio frequency signals. interference, and can reduce path loss, thereby improving the difficulty of circuit design in 5G NR communication networks, and its performance exceeds that of RF cable connections.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (10)

1. A radio frequency front end circuit comprising a transmit module, a single pole, multiple throw switch, a plurality of receive modules, and a plurality of antennas, wherein:

the transmitting module is connected with the input end of the single-pole multi-throw switch, and a plurality of output ends of the single-pole multi-throw switch are respectively connected with the plurality of antennas in a one-to-one correspondence manner;

the plurality of receiving modules are respectively connected with the plurality of antennas in a one-to-one corresponding mode.

2. The rf front-end circuit according to claim 1, further comprising a plurality of single-pole double-throw switches, each of the single-pole double-throw switches comprising one input and two outputs;

one output end of each single-pole double-throw switch is connected with one output end of the single-pole double-throw switch in a one-to-one corresponding mode, and the other output end of each single-pole double-throw switch is connected with one receiving module in a one-to-one corresponding mode.

3. The rf front-end circuit of claim 2, wherein the plurality of antennas are a first antenna, a second antenna, a third antenna, and a fourth antenna, the plurality of single-pole double-throw switches are a first single-pole double-throw switch, a second single-pole double-throw switch, a third single-pole double-throw switch, and a fourth single-pole double-throw switch, and the plurality of receiving modules are a first receiving module, a second receiving module, a third receiving module, and a fourth receiving module;

the first antenna, the second antenna and the third antenna are respectively connected with the input end of the first single-pole double-throw switch, the input end of the second single-pole double-throw switch and the input end of the third single-pole double-throw switch in a one-to-one correspondence manner, an output of the first SPDT switch, an output of the second SPDT switch, and an output of the third SPDT switch, are respectively connected with the first output end, the second output end and the third output end of the single-pole multi-throw switch in a one-to-one correspondence mode, the other output terminal of the first SPDT switch, the other output terminal of the second SPDT switch, and the other output terminal of the third SPDT switch, the first receiving module, the second receiving module and the third receiving module are respectively connected in a one-to-one corresponding mode;

the fourth antenna is connected with a fourth output end of the single-pole multi-throw switch;

the transmitting module and the fourth receiving module are respectively connected with one output end of the fourth single-pole double-throw switch, and the input end of the fourth single-pole double-throw switch is connected with the input end of the single-pole double-throw switch.

4. The radio-frequency front-end circuit according to claim 3, wherein the first antenna, the second antenna, and the third antenna are connected to an input terminal of the first SPDT, an input terminal of the second SPDT, and an input terminal of the third SPDT, respectively, in a one-to-one correspondence, one output terminal of the first SPDT, one output terminal of the second SPDT, and one output terminal of the third SPDT are connected to a first output terminal, a second output terminal, and a third output terminal of the SPDT, respectively, in a one-to-one correspondence, and the other output terminal of the first SPDT, the other output terminal of the second SPDT, and the other output terminal of the third SPDT are connected to one-to-one correspondence, the first receiving module, the second receiving module and the third receiving module are respectively connected, the distance between the first receiving module and the first antenna is within a first preset threshold interval range, the distance between the second receiving module and the second antenna is within a second preset threshold interval range, and the distance between the third receiving module and the third antenna is within a third preset threshold interval range.

5. The radio frequency front-end circuit according to claim 3, wherein the transmitting module comprises a transmitter and at least one signal processing unit.

6. The radio frequency front-end circuit according to claim 3, wherein the receiving module comprises a receiver and at least one signal processing unit.

7. The rf front-end circuit according to claim 5 or 6, wherein the signal processing unit comprises a filter.

8. The rf front-end circuit according to claim 7, wherein the transmitting module and the fourth receiving module are each connected to an output of the fourth single-pole double-throw switch, and wherein an input of the fourth single-pole double-throw switch is connected to an input of the single-pole multi-throw switch through at least one filter.

9. The rf front-end circuit according to claim 1, wherein the transmit module further comprises an rf power amplifier, the transmitter is connected to an input of the rf power amplifier, and an output of the rf power amplifier is connected to at least one filter.

10. An electronic device comprising the radio frequency front end circuit according to any one of claims 1 to 9.

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