CN111277295A - Radio frequency front-end circuit and electronic equipment - Google Patents
Radio frequency front-end circuit and electronic equipment Download PDFInfo
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- CN111277295A CN111277295A CN202010076559.8A CN202010076559A CN111277295A CN 111277295 A CN111277295 A CN 111277295A CN 202010076559 A CN202010076559 A CN 202010076559A CN 111277295 A CN111277295 A CN 111277295A
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- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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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
Technical Field
The present application relates to the field of communications technologies, and in particular, to a radio frequency front end circuit and an electronic device.
Background
With the great popularization of mobile intelligent terminals, the demand of users on data traffic is increasing, for example, the peak rate of 5G NR can reach 20Gbps, and the increase of the rate requires that 5G NR needs to have the capability of 4 × 4 MIMO. The currently required operating frequency and bandwidth for electronic devices are increasing, which makes the device limit challenging.
Generally, the functions of one transmit path and four receive paths in the rf front-end circuit may be implemented by a plurality of three-pole-three-throw switches. However, in the above manner, the path loss of the electronic device is directly affected by the layout and routing, and the three-pole three-throw switch may cause the isolation between the antennas to be poor, which may cause large interference between the radio frequency signals. Therefore, it is desirable to provide an rf front-end circuit with better path loss control, better isolation and less rf signal interference.
Disclosure of Invention
An object of the embodiments of the present application is to provide a radio frequency front end circuit and an electronic device, so as to solve the problems of poor path loss control, poor isolation between antennas, and large radio frequency signal interference of the radio frequency front end circuit in the prior art.
In order to solve the above technical problem, the embodiment of the present application is implemented as follows:
the radio frequency front-end circuit provided by the embodiment of the application comprises a transmitting module, a single-pole multi-throw switch, a plurality of receiving 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.
Optionally, the switch further comprises a plurality of single-pole double-throw switches, each of which comprises one input terminal and two output terminals;
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.
Optionally, the multiple antennas are a first antenna, a second antenna, a third antenna and a fourth antenna, the multiple 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 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 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 end of the first single-pole double-throw switch, an output end of the second single-pole double-throw switch and an output end of the third single-pole double-throw switch are respectively connected with a first output end, a second output end and a third output end of the single-pole double-throw switch in a one-to-one correspondence manner, 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.
Optionally, the first antenna, the second antenna, and the third antenna are respectively connected to an input terminal of the first single-pole double-throw switch, an input terminal of the second single-pole double-throw switch, and an input terminal of the third single-pole double-throw switch in a one-to-one correspondence manner, one output terminal of the first single-pole double-throw switch, one output terminal of the second single-pole double-throw switch, and one output terminal of the third single-pole double-throw switch are respectively connected to a first output terminal, a second output terminal, and a third output terminal of the single-pole double-throw switch in a one-to-one correspondence manner, and the other output terminal of the first single-pole double-throw switch, the other output terminal of the second single-pole double-throw switch, and the other output terminal of the third single-pole double-throw switch are respectively connected to the first receiving module, the second receiving module, and the third receiving module in a one-to one correspondence manner, and 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.
Optionally, the transmitting module includes a transmitter and at least one signal processing unit therein.
Optionally, the receiving module includes a receiver and at least one signal processing unit.
Optionally, the signal processing unit comprises a filter.
Optionally, the transmitting module and the fourth receiving module are respectively connected to an output terminal of the fourth single-pole double-throw switch, and an input terminal of the fourth single-pole double-throw switch is connected to an input terminal of the single-pole double-throw switch through at least one filter.
Optionally, the transmitting module further includes a radio frequency power amplifier, the transmitter is connected to an input end of the radio frequency power amplifier, and an output end of the radio frequency power amplifier is connected to at least one filter.
In a second aspect, an electronic device provided in an embodiment of the present application includes the radio frequency front-end circuit provided in the foregoing embodiment.
As can be seen from the above technical solutions provided in the embodiments of the present application, the radio frequency front-end circuit in 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, where: the transmitting module is connected with the input end of the single-pole multi-throw switch, a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas in a one-to-one corresponding mode, a plurality of receiving modules are respectively connected with a plurality of antennas in a one-to-one corresponding mode, thus, one or a plurality of signal transmitting paths and a plurality of signal receiving paths in the communication network can be realized through one single-pole multi-throw switch, and one or a plurality of signal transmitting paths and a plurality of signal receiving paths formed by the framework can improve the element difference loss caused by different elements and increase the flexibility of the circuit layout, meanwhile, the single-pole multi-throw switch (such as the single-pole four-throw switch) has better isolation compared with other types of switches, thereby reducing the interference between radio frequency signals and reducing the path loss, thereby improving the circuit design difficulty in the 5G NR communication network, and its performance exceeds that of the RF cable connection.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic diagram of an rf front-end circuit according to the present application;
FIG. 2 is a schematic diagram of an alternative RF front-end circuit according to the present application;
FIG. 3 is a schematic diagram of an RF front-end circuit according to yet another embodiment of the present application;
FIG. 4 is a schematic diagram of an RF front-end circuit according to yet another embodiment of the present application;
fig. 5 is a schematic diagram of an rf front-end circuit according to another embodiment of the present invention.
Illustration of the drawings:
p-transmitting module, R, R1, R2, R3, R4-receiving module, SP-single-pole multi-throw switch, SP 4T-single-pole four-throw switch, S1-switching control terminal of single-pole four-throw switch, T1, T2, T3, T4-transmitting terminal of single-pole four-throw switch, ANT1, ANT2, ANT3, ANT 4-antenna, SPDT 4-single-pole double-throw switch, C4, switching control terminal of single-pole four-throw switch, D4-receiving terminal of single-pole four-throw switch, F4-signal processing unit.
Detailed Description
The embodiment of the application provides a radio frequency front-end circuit and electronic equipment.
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 clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
The embodiment of the present application provides a radio frequency front end circuit, which may be a radio frequency front end circuit used in an electronic device to connect to a wireless communication network, where the wireless communication network may be a 2G wireless communication network, a 3G wireless communication network, a 4G wireless communication network, or a 5G wireless communication network, or may also be a higher-level wireless communication network, and the like. The rf front-end circuit may include a signal transmitting path and a signal receiving path, where the number of the signal transmitting path and the number of the signal receiving path may be set according to actual situations, that is, the rf front-end circuit may include one or more signal transmitting paths and one or more signal receiving paths, the signal transmitting path may include a transmitting module P and an antenna ANT, etc., and the signal receiving path may include a receiving module R and an antenna ANT, etc. Based on this, the rf 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 (for example, amplifying the power of the radio frequency signals, etc.), and therefore, various components may be included in the transmitting module P.
The receiving module R may be a module capable of processing the radio frequency signal received by the antenna ANT and providing the radio frequency signal to corresponding electronic equipment, and the receiving module R may also include various components, which may be set specifically according to an actual situation, and this is not limited in this embodiment of the present application.
The antenna ANT may be a component for transmitting and receiving radio frequency signals, and the same antenna ANT may be used for transmitting and receiving radio frequency signals.
The single-pole multi-throw switch SP may include an input terminal S1 and a plurality of output terminals (T1, T2, T3, T4 …), and the input terminal S1 may be connected to any one of the plurality of output terminals (T1, T2, T3, T4 …) to select a corresponding path.
In order to enable the radio frequency front-end circuit to realize one or more signal transmitting paths, a transmitting module P may be connected to an input terminal of a single-pole multi-throw switch SP, and a plurality of output terminals (T1, T2, T3, T4 …) of the single-pole multi-throw switch SP are respectively connected to a plurality of antennas ANT in a one-to-one correspondence manner, so that the output terminal selectively connected through the single-pole multi-throw switch SP is connected to the antenna ANT, thereby forming a signal transmitting path including the transmitting module P, the input terminal of the single-pole multi-throw switch SP, one output terminal of the single-pole multi-throw switch SP, and the antenna ANT.
In order to enable the rf front-end circuit to implement multiple signal receiving paths, the multiple receiving modules R may be connected to the multiple antennas ANT in a one-to-one correspondence manner, and thus, the multiple receiving modules R are connected to the multiple antennas ANT, thereby forming multiple signal receiving paths including the receiving modules R and the multiple antennas ANT.
In order to more clearly illustrate a specific structure of the rf front-end circuit, a specific application scenario is described as follows:
in practical applications, as shown in fig. 1, for a 5G wireless communication network, the corresponding rf front-end circuit may 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 paths are simultaneously required, the number of required antennas ANT may be 4, the number of receiving modules R may also be 4, and for the case of including 1 signal transmitting path, the transmitting module P may include 1. In addition, in order to realize that the radio frequency signal of the transmitting module P can be transmitted from any antenna ANT, 1 single-pole multi-throw switch SP may be set as a single-pole four-throw switch SP4T for connecting the transmitting module P and 4 antennas ANT, respectively.
Based on the above components or assemblies, the functions of one signal transmitting path and four signal receiving paths in the 5G wireless communication network can be realized, and specifically, for one of the signal transmitting paths, the transmitting module P may be connected to each of the four antennas ANT through the single-pole four-throw switch SP 4T. The input end S1 of the single-pole four-throw switch SP4T is connected with the output end of the transmitting module P, and each output end of the single-pole four-throw switch SP4T is connected with an antenna ANT, thereby constructing four selectable signal transmitting paths. The output end of the transmitting module P may output a radio frequency signal, and transmit the radio frequency signal to the input end S1 of the single-pole four-throw switch SP4T, a signal transmitting path may be selected in advance through the single-pole four-throw switch SP4T, the radio frequency signal may be transmitted from the input end S1 to the output end corresponding to the selected signal transmitting path, and the radio frequency signal may be transmitted from the output end to the antenna ANT, and the antenna ANT may transmit the radio frequency signal.
As shown in fig. 1, the input end of the single-pole four-throw switch SP4T is S1, the four output ends are T1, T2, T3 and T4, T1 is connected to the antenna ANT1, T2 is connected to the antenna ANT2, T3 is connected to the antenna ANT3, T4 is connected to the antenna ANT4, and the input end S1 is connected to the output end T2 through the single-pole four-throw switch SP4T, so that the corresponding signal transmitting paths can be formed by the transmitting module P, the input end S1 of the single-pole four-throw switch SP4T, the output end T2 of the single-pole four-throw switch SP4T and the antenna ANT2 in sequence, and the radio frequency signal of the transmitting module P can be transmitted to the antenna ANT2 through the signal transmitting paths.
It should be noted that, in practical applications, not only the antenna ANT2 may be selected to transmit a radio frequency signal, but also other antennas ANT may transmit a radio frequency signal, for example, the antennas ANT1, ANT3, or ANT4, and the selection may be specifically performed by the single-pole four-throw switch SP4T, which is not limited in this embodiment. The transmission of radio frequency signals from either antenna ANT can be achieved by a single pole four throw switch SP 4T.
For the four signal receiving paths, the four receiving modules R are connected with the four antennas ANT in a one-to-one correspondence manner, that is, each of the four receiving modules R may be connected with one of the four antennas ANT, and each of the four antennas ANT may be connected with one of the four receiving modules R, so that the four receiving modules R and the four antennas ANT form a one-to-one correspondence connection manner. Specifically, for a 5G wireless communication network, four signal receiving paths are required to receive radio frequency signals simultaneously, so that each receiving module R can be connected to one antenna ANT, and the antenna ANT connected to one receiving module R cannot be connected to other receiving modules R. For example, the four receiving modules R may be a receiving module R1, a receiving module R2, a receiving module R3, and a receiving module R4, one receiving module R may be connected to one antenna ANT, one receiving module R may be selected from the remaining receiving modules R, one antenna ANT may be selected from the remaining antennas ANT, the selected receiving module R is connected to the antenna ANT, and so on, and finally four signal receiving paths may be obtained, specifically, the receiving module R1 may be connected to the antenna ANT1, the receiving module R2 may be connected to the antenna ANT2, the receiving module R3 may be connected to the antenna ANT3, and the receiving module R4 may be connected to the antenna ANT4, so that the four receiving modules R and the four antenna ANTs form a one-to-one corresponding connection mode.
It should be noted that, in order to effectively control the signal receiving path, a switch may be disposed between each receiving module R and the antenna ANT, as shown in fig. 2, and the switch may control the connection and disconnection of the corresponding signal receiving path.
The embodiment of the application provides a radio frequency front-end circuit, which can include a transmitting module, a single-pole multi-throw switch, a plurality of receiving modules and a plurality of antennas, wherein: the transmitting module is connected with the input end of the single-pole multi-throw switch, a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas in a one-to-one corresponding mode, a plurality of receiving modules are respectively connected with a plurality of antennas in a one-to-one corresponding mode, thus, one or a plurality of signal transmitting paths and a plurality of signal receiving paths in the communication network can be realized through one single-pole multi-throw switch, and one or a plurality of signal transmitting paths and a plurality of signal receiving paths formed by the framework can improve the element difference loss caused by different elements and increase the flexibility of the circuit layout, meanwhile, the single-pole multi-throw switch (such as the single-pole four-throw switch) has better isolation compared with other types of switches, thereby reducing the interference between radio frequency signals and reducing the path loss, thereby improving the circuit design difficulty in the 5G NR communication network, and its performance exceeds that of the RF cable connection.
Example two
Fig. 3 is a further rf front-end circuit according to an embodiment of the present application, which includes all the functional units of the rf front-end circuit shown in fig. 1-2, and is improved on the basis of the foregoing, and the improvement is as follows:
in order to better control the various paths (including the signal transmitting path and the signal receiving path) formed after the antenna ANT is connected, a single-pole double-throw switch SPDT may be provided to implement one or more signal transmitting paths and a plurality of signal receiving paths. Specifically, a plurality of single-pole double-throw switches SPDT may be provided according to actual situations, and each single-pole double-throw switch SPDT may include one input terminal and two output terminals. The input end can be connected with any one output end, one output end of each SPDT is connected with one output end of the SP in a one-to-one corresponding mode, and the other output end of each SPDT is connected with one receiving module R in a one-to-one corresponding mode.
In order to more clearly illustrate the above composition structure, a specific application scenario is described as an example below, which may specifically be as follows:
for a 5G wireless communication network, a signal transmitting path and four signal receiving paths need to be implemented, based on the above, four single-pole double-throw switches SPDT may be set, the input ends of the four single-pole double-throw switches SPDT are respectively connected with four antennas ANT in a one-to-one correspondence manner, that is, each antenna ANT may be connected with the input end of one single-pole double-throw switch SPDT, the input end of each single-pole double-throw switch SPDT is connected with one antenna ANT, one output end of the single-pole double-throw switch SPDT may be connected with one output end of the single-pole double-throw switch SPDT, and the other output end of the single-pole double-throw switch SPDT may be connected with one receiving module R.
As shown in fig. 3, four single-pole double-throw switches SPDT, namely, a switch SPDT1, a switch SPDT2, a switch SPDT3 and a switch SPDT4, are disposed in the rf front-end circuit, wherein the switch SPDT1 includes an input terminal C1, an output terminal D11 and an output terminal D12, the switch SPDT2 includes an input terminal C2, an output terminal D21 and an output terminal D22, the switch SPDT3 includes an input terminal C3, an output terminal D31 and an output terminal D32, and the switch SPDT4 includes an input terminal C4, an output terminal D41 and an output terminal D42. An antenna ANT1 is connected with an input end C1, an output end D11 is connected with a receiving module R1, an output end D12 is connected with a T1 in a single-pole four-throw switch SP4T, an antenna ANT2 is connected with an input end C2, an output end D21 is connected with a receiving module R2, an output end D22 is connected with a T2 in a single-pole four-throw switch SP4T, an antenna ANT3 is connected with an input end C3, an output end D3 is connected with a receiving module R3, an output end D3 is connected with a T3 in the single-pole four-throw switch SP4 3, an antenna ANT3 is connected with an input end C3, an output end D3 is connected with the receiving module R3, and an output end D3 is connected with a T3 in the single-pole four-throw.
For the structure of the radio frequency front-end circuit shown in fig. 3, the structure may be further modified, and an embodiment of the present application further provides an optional radio frequency front-end circuit, where the multiple antennas ANT are a first antenna, a second antenna, a third antenna, and a fourth antenna, the multiple 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 multiple receiving modules are a first receiving module, a second receiving module, a third receiving module, and a fourth receiving module, which may specifically include the following contents: the first antenna, the second antenna and the third antenna are respectively connected with an input end of a first single-pole double-throw switch, an input end of a second single-pole double-throw switch and an input end of a third single-pole double-throw switch in a one-to-one correspondence manner, one output end of the first single-pole double-throw switch SPDT, one output end of the second single-pole double-throw switch SPDT and one output end of the third single-pole double-throw switch SPDT are respectively connected with a first output end, a second output end and a third output end of the single-pole double-throw switch in a one-to-one correspondence manner, and the other output end of the first single-pole double-throw switch SPDT, the other output end of the second single-pole double-throw switch SPDT and the other output end of the third single-pole double-throw switch SPDT are respectively connected with a first receiving module, a second receiving module and a third receiving module in a one-to-one correspondence manner; the fourth antenna is connected with the fourth output end of the single-pole multi-throw switch SP; the transmitting module P and the fourth receiving module are respectively connected with one output end of a fourth single-pole double-throw switch SPDT, and the input end of the fourth single-pole double-throw switch SPDT is connected with the input end of a single-pole multi-throw switch SP.
In an implementation, three antennas ANT (i.e., the first antenna, the second antenna, and the third antenna) may be selected from the four antennas ANT, a single-pole double-throw switch SPDT may be provided, three single-pole double-throw switches SPDT (i.e., the first single-pole double-throw switch, the second single-pole double-throw switch, and the third single-pole double-throw switch) may be selected from the four single-pole double-throw switches SPDT, and the selected three antennas ANT and the selected three single-pole double-throw switches SPDT may form a one-to-one corresponding connection manner, that is, each antenna ANT of the selected three antennas ANT is connected to an input end of one single-pole double-throw switch SPDT, and an input end of each single-pole double-throw switch SPDT is connected to one antenna ANT. One output terminal of the SPDT switch may be connected to one output terminal of the SPDT switch SP4T, and the other output terminal of the SPDT switch may be connected to a receiving module R. Furthermore, for the fourth antenna and the fourth SPDT, the connection may be made in such a way that the transmitting module P may be connected to one output terminal of the fourth SPDT and the fourth receiving module may be connected to the other output terminal of the fourth SPDT.
The rf front-end circuit shown in fig. 3 may be modified to obtain the rf front-end circuit shown in fig. 4, where an antenna ANT1 is connected to a T1 of the single-pole four-throw switch, a receiving module R1 is connected to an output D11, a transmitting module P is connected to an output D12, an input C2 is connected to an input S1, an antenna ANT2 is connected to an input C2, an output D21 is connected to a receiving module R2, an output D22 is connected to a T2 of the single-pole four-throw switch SP4T, an antenna ANT3 is connected to an input C3, an output D3 is connected to a receiving module R3, an output D3 is connected to a T3 of the single-pole four-throw switch SP4 3, an antenna ANT3 is connected to an input C3, an output D3 is connected to a receiving module R3, and an output D3 is connected to a T3 of the single-pole four-throw switch.
In addition, for the transmitting module P in the rf front-end circuit, the transmitting module P may include a plurality of different functional components or functional assemblies, and different functions of the transmitting module P may be implemented through the different functional components or functional assemblies, which may be specifically set according to actual situations, and an optional structure of the transmitting module P is provided in this embodiment of the present application, which may specifically include the following contents: the transmission module P may comprise a transmitter and at least one signal processing unit F.
The transmitter may be a component that modulates a high-frequency carrier wave with a useful low-frequency signal and converts the high-frequency carrier wave into an electromagnetic wave having a certain bandwidth at a certain center frequency and suitable for being transmitted through the antenna ANT. The signal processing unit F may be a unit capable of processing a video signal, and the signal processing unit F may include various units, such as a filter, a modem, a power amplifier, and the like, which may be set according to practical situations, and this is not limited in this embodiment of the present application.
In implementation, one or more signal processing units F may be set according to actual conditions, and then, the output end of the transmitter may be connected to the signal input end of the signal processing unit F, so that the radio frequency signal output by the transmitter may be transmitted to the signal processing unit F for processing, and a processed radio frequency signal is obtained. The processed radio frequency signal may be sent to a corresponding antenna ANT through a transmission path for transmission.
Further, 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 therein.
The signal processing unit F in the receiving module R may be different from the signal processing unit F in the 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.
The filter may be used to suppress unwanted noise (which may include other signals, etc.) in the rf signal, and does not add any noise or interference to the wanted signal. The selection of the filter may be selected according to actual conditions, which is not limited in the embodiment of the present application.
In addition, for the rf front-end circuit of fig. 4, considering that the receiving module R and the transmitting module P may not include filters, in order to ensure the quality of the rf signal, one or more filters may be disposed between the input terminal of the SPDT and the input terminal of the SP4T, and specifically may include: the transmitting module P and the fourth receiving module R are respectively connected to a receiving end of a fourth SPDT, and an input end of the fourth SPDT is connected to an input end of the SPDT SP4T through at least one filter.
As shown in fig. 5, the antenna ANT1 is connected to a T1 of the single-pole four-throw switch, the receiving module R1 is connected to the output D11, the transmitting module P is connected to the output D12, the input C2 is connected to the input of one or more filters, the output of the filters is connected to the input S1, the antenna ANT2 is connected to the input C2, the output D21 is connected to the receiving module R2, the output D22 is connected to a T2 of the single-pole four-throw switch SP4T, the antenna ANT3 is connected to the input C3, the output D3 is connected to the receiving module R3, the output D3 is connected to a T3 of the single-pole four-throw switch SP4 3, the antenna ANT3 is connected to the input C3, the output D3 is connected to the receiving module R3, and the output D3 is connected to a T3 of the single-pole four-throw switch SP 4.
In addition, the transmitting module P further includes a radio frequency power amplifier, the transmitter is connected to an input terminal of the radio frequency power amplifier, and an output terminal of the radio frequency power amplifier is connected to at least one filter.
In implementation, in a front-stage circuit of a transmitter, the power of the radio frequency signal generated by the modulation oscillation circuit is small, and since the range of the radio frequency signal with too small power radiated by the antenna ANT is small, a series of radio frequency signal amplification (including a buffer stage, an intermediate amplification stage, a final power amplification stage, etc.) is required to obtain enough radio frequency power, so that the radio frequency signal can be fed to the antenna ANT for transmission. In order to obtain a sufficiently large radio frequency output power, a radio frequency power amplifier may be employed. After the rf signal is generated, the rf signal may be amplified to a sufficient transmission power by an rf power amplifier, and then transmitted by an antenna ANT.
It should be noted that, in practical applications, the radio frequency power amplifier may include a plurality of different types of radio frequency power amplifiers, for example, a linear power amplifier, a switch-type power amplifier, and the like, and the corresponding radio frequency power amplifier may be specifically selected according to practical situations, which is not limited in this embodiment of the present application.
In practical applications, in order to improve the receiving performance of the antenna ANT, the receiving module R may be disposed at a position close to the antenna ANT, and connected to the input terminal of the first SPDT, the input terminal of the second SPDT, and the input terminal of the third SPDT in a one-to-one correspondence manner for the first antenna, the second antenna, and the third antenna, respectively, 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 the first output terminal, the second output terminal, and the third output terminal of the SPDT in a one-to-one correspondence manner, respectively, 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 in a one-to-one correspondence manner, the first receiving module, the second receiving module and the third receiving module are connected respectively, 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. The fourth antenna is connected with the 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 a fourth single-pole double-throw switch SPDT, and the input end of the fourth single-pole double-throw switch SPDT is connected with the input end of the single-pole multi-throw switch.
For example, based on the rf front-end circuit of fig. 5 described above, the receiving module R3 may be disposed at a position where the distance from the antenna ANT3 is within a first predetermined threshold interval, and the receiving module R4 may be disposed at a position where the distance from the antenna ANT4 is within a second predetermined threshold interval.
In implementation, based on the rf front-end circuit shown in fig. 5 described above, it is possible to permit the switch SPDT2 and the receiving module R2, the switch SPDT3 and the receiving module R3, the switch SPDT4 and the receiving module R4 to be placed close to the antenna ANT end, by the sensitivity calculation formula (1) of the receiving module R
Sen(dBm)＝-174dBm/Hz+NF+10logB+SNR (1)
Wherein Sen represents sensitivity, SNR represents demodulation signal-to-noise ratio, NF represents noise figure, and B represents bandwidth of the radio frequency signal.
As can be seen from the above equation (1), if 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 may be respectively disposed near the antenna ANT end, so that the calculation formula (2) of the NF may be based on
Wherein, F1、F2、F3、F4Representing the noise figure, G, of each of the cascaded blocks1、G2、G3The gain of each of the cascaded blocks is shown.
Based on the above formula (2), it can be known that the closer the receiving module R2 is to the ANT2, the larger the G1 is, and the larger the G1 is, the smaller the NF is, the better the receiving performance is, and the currently applied RF cable mechanism can be saved, and the performance is also improved well.
The embodiment of the application provides a radio frequency front-end circuit, which can include a transmitting module, a single-pole multi-throw switch, a plurality of receiving modules and a plurality of antennas, wherein: the transmitting module is connected with the input end of the single-pole multi-throw switch, a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas in a one-to-one corresponding mode, a plurality of receiving modules are respectively connected with a plurality of antennas in a one-to-one corresponding mode, thus, one or a plurality of signal transmitting paths and a plurality of signal receiving paths in the communication network can be realized through one single-pole multi-throw switch, and one or a plurality of signal transmitting paths and a plurality of signal receiving paths formed by the framework can improve the element difference loss caused by different elements and increase the flexibility of the circuit layout, meanwhile, the single-pole multi-throw switch (such as the single-pole four-throw switch) has better isolation compared with other types of switches, thereby reducing the interference between radio frequency signals and reducing the path loss, thereby improving the circuit design difficulty in the 5G NR communication network, and its performance exceeds that of the RF cable connection.
EXAMPLE III
Above is the radio frequency front-end circuit that this application embodiment provided, based on same thinking, this application embodiment still provides an electronic equipment, electronic equipment includes the radio frequency front-end circuit.
The radio frequency front-end circuit comprises 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 with the input end of the single-pole multi-throw switch SP, and a plurality of output ends of the single-pole multi-throw switch SP are respectively connected with the plurality of antennas ANT in a one-to-one corresponding mode;
the plurality of receiving modules R are respectively connected to the plurality of antennas ANT in a one-to-one correspondence manner.
In an embodiment of the present application, the rf front-end circuit further includes a plurality of single-pole double-throw switches SPDT, each of the single-pole double-throw switches SPDT includes an input end and two output ends;
one output end of each single-pole double-throw switch SPDT is connected with one output end of the single-pole double-throw switch SP in a one-to-one corresponding mode, and the other output end of each single-pole double-throw switch SPDT is connected with one receiving module R in a one-to-one corresponding mode.
In an embodiment of the present application, the multiple antennas are a first antenna, a second antenna, a third antenna, and a fourth antenna, the multiple single-pole double-throw switches SPDT are a first single-pole double-throw switch SPDT, a second single-pole double-throw switch SPDT, a third single-pole double-throw switch SPDT, and a fourth single-pole double-throw switch SPDT, and 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 connected to an input terminal of the first SPDT, an input terminal of the second SPDT, and an input terminal of the third SPDT in a one-to-one correspondence manner, respectively, an output terminal of the first SPDT, an output terminal of the second SPDT, and an 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 switch SP in a one-to-one correspondence manner, respectively, and another output terminal of the first SPDT, another output terminal of the second SPDT, and another output terminal of the third SPDT switch SP are connected to the first receiving module, the second receiving module, and the third receiving module in a one-to-one correspondence manner, respectively, The second receiving module is connected with the third receiving module;
the fourth antenna is connected with a fourth output end of the single-pole multi-throw switch SP;
the transmitting module P and the fourth receiving module are respectively connected to an output terminal of the fourth SPDT, and an input terminal of the fourth SPDT is connected to an input terminal of the single-pole multi-throw switch SP.
In an embodiment of the present invention, the first antenna, the second antenna, and the third antenna are connected to the input terminal of the first SPDT, the input terminal of the second SPDT, and the input terminal of the third SPDT in a one-to-one correspondence, the one output terminal of the first SPDT, the one output terminal of the second SPDT, and the one output terminal of the third SPDT are connected to the first output terminal, the second output terminal, and the third output terminal of the SPDT 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 the first receiving module, the second receiving module, and the third receiving module in a one-to-one correspondence, The second receiving module is connected with the third receiving module, a distance between the first receiving module and the first antenna is within a first preset threshold interval range, a distance between the second receiving module and the second antenna is within a second preset threshold interval range, and a distance between the third receiving module and the third antenna is within a third preset threshold interval range.
In the embodiment of the present application, the transmitting module P includes a transmitter and at least one signal processing unit F.
In the embodiment of the present application, the receiving module R includes a receiver and at least one signal processing unit F.
In the embodiment of the present application, the signal processing unit F includes a filter.
In this embodiment, the transmitting module P and the fourth receiving module are respectively connected to an output terminal of the fourth SPDT, and an input terminal of the fourth SPDT is connected to an input terminal of the single-pole multi-throw switch SP through at least one filter.
In this embodiment, the transmitting module P further includes a radio frequency power amplifier, the transmitter is connected to an input terminal of the radio frequency power amplifier, and an output terminal of the radio frequency power amplifier is connected to at least one filter.
An 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, where: the transmitting module is connected with the input end of the single-pole multi-throw switch, a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas in a one-to-one corresponding mode, a plurality of receiving modules are respectively connected with a plurality of antennas in a one-to-one corresponding mode, thus, one or a plurality of signal transmitting paths and a plurality of signal receiving paths in the communication network can be realized through one single-pole multi-throw switch, and one or a plurality of signal transmitting paths and a plurality of signal receiving paths formed by the framework can improve the element difference loss caused by different elements and increase the flexibility of the circuit layout, meanwhile, the single-pole multi-throw switch (such as the single-pole four-throw switch) has better isolation compared with other types of switches, thereby reducing the interference between radio frequency signals and reducing the path loss, thereby improving the circuit design difficulty in the 5G NR communication network, and its performance exceeds that of the RF cable connection.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in 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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| CN202010076559.8A CN111277295A (en) | 2020-01-23 | 2020-01-23 | Radio frequency front-end circuit and electronic equipment |
| PCT/CN2020/103527 WO2021147279A1 (en) | 2020-01-23 | 2020-07-22 | Radio frequency front-end circuit and electronic device |
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| CN202010076559.8A CN111277295A (en) | 2020-01-23 | 2020-01-23 | Radio frequency front-end circuit and electronic equipment |
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| CN111404576A (en) * | 2020-03-24 | 2020-07-10 | RealMe重庆移动通信有限公司 | Radio frequency system and electronic equipment |
| CN112910493A (en) * | 2021-02-01 | 2021-06-04 | 维沃移动通信有限公司 | Antenna system and electronic device |
| WO2021147279A1 (en) * | 2020-01-23 | 2021-07-29 | 维沃移动通信有限公司 | Radio frequency front-end circuit and electronic device |
| CN113541725A (en) * | 2021-09-14 | 2021-10-22 | 上海豪承信息技术有限公司 | Diversity switch assembly, radio frequency device and communication equipment |
| WO2022166653A1 (en) * | 2021-02-07 | 2022-08-11 | 锐石创芯(深圳)科技股份有限公司 | Radio frequency front-end module and antenna apparatus |
| CN116073859A (en) * | 2021-11-01 | 2023-05-05 | 苏州大学 | Radio frequency switch matrix supporting single-shot multi-receive detection mode of reader |
| CN116505992A (en) * | 2023-06-25 | 2023-07-28 | 西安安森智能仪器股份有限公司 | Wireless communication method |
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| WO2021147279A1 (en) | 2021-07-29 |
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