CN115733509A - Radio frequency front-end module circuit, antenna phased array transceiver system and signal processing method - Google Patents

Abstract

The invention is suitable for the technical field of communication, and discloses a radio frequency front end module circuit, an antenna phased array transceiving system and a signal processing method, wherein the radio frequency front end module circuit comprises: switches, bi-directional amplifiers and filters; the movable end of the switch is connected with the receiving link and the transmitting link; one end of the bidirectional amplifier is connected with the fixed end of the switch, the other end of the bidirectional amplifier is connected with one end of the filter, and the other end of the filter is connected with the external antenna; the switch is used for controlling access to the receiving link or the transmitting link so as to enable the receiving link or the transmitting link to be conducted; and the bidirectional amplifier is used for carrying out power amplification processing on the signals of the receiving link or the transmitting link based on the control of the switch.

Description

Radio frequency front-end module circuit, antenna phased array transceiver system and signal processing method

technical field

The invention relates to the field of communication technology, in particular to a radio frequency front-end module circuit, an antenna phased array transceiver system and a signal processing method.

Background technique

The traditional single-antenna RF integrated transceiver system is mainly divided into four parts: antenna, RF front-end module, analog transceiver module and baseband signal processor. The RF front-end module is the key technology for the wireless connection of the RF integrated transceiver chip system, and is the core component between the antenna and the analog transceiver module to realize signal transmission and reception. Usually includes an off-chip antenna, off-chip transceiver switch, and RF transmitter channel and receiver channel. The radio frequency receiving channel includes a low-noise amplifier and a receiving filter; the radio frequency transmitting channel includes a broadband power amplifier and a transmitting filter. This solution divides the radio frequency transmission channel and the reception channel into two independent signal paths. Although it can reduce the mutual interference of the transmission and reception channels, it increases the complexity of the system design, resulting in large chip area, high power consumption, and low integration. On the low side. As a result, the multi-element antenna phased array transceiver system composed of a single antenna basic unit has a complicated design process and high hardware costs.

Contents of the invention

In order to solve the existing technical problems, the embodiment of the present invention provides a radio frequency front-end module circuit, an antenna phased array transceiver system and a signal processing method.

In order to achieve the above object, the technical solution of the embodiment of the present invention is achieved in this way:

In the first aspect, the embodiment of the present invention provides a radio frequency front-end module circuit, the circuit includes: a switch, a bidirectional amplifier and a filter; wherein, the moving end of the switch is connected to the receiving link and the transmitting link; the One end of the bidirectional amplifier is connected to the fixed end of the switch, the other end of the bidirectional amplifier is connected to one end of the filter, and the other end of the filter is connected to an off-chip antenna;

The switch is used to control access to the receiving link or the transmitting link, so as to turn on the receiving link or the transmitting link;

The bidirectional amplifier is configured to perform power amplification processing on signals of the receiving link or the transmitting link based on the control of the switch.

In the above circuit, when the switch is used to control access to the transmission link, the bidirectional amplifier is used to perform power amplification processing on the signal of the transmission link.

In the above circuit, when the switch is used to control access to the receiving link, the bidirectional amplifier is used to perform power amplification processing on the signal of the receiving link.

In the second aspect, the embodiment of the present invention also provides an antenna phased array transceiver system, the system includes: an analog transceiver module, a radio frequency front-end module circuit and an off-chip antenna as described in the first aspect, the radio frequency The moving end of the switch in the front-end module circuit is connected to the analog transceiver module, and the other end of the filter in the radio frequency front-end module circuit is connected to the off-chip antenna; wherein, the analog transceiver module includes at least a receiving chain road and transmission link;

The radio frequency front-end module circuit is used to control access to the receiving link or the transmitting link in the analog transceiver module, and perform power amplification processing on the signal of the receiving link or the transmitting link ;

The off-chip antenna is used to transmit the signal after power amplification processing by the radio frequency front-end module circuit, or transmit the signal to the radio frequency front-end module circuit.

In the above system, the number of the analog transceiver module and the off-chip antenna is the same as the number of the radio frequency front-end module circuit, the number is 2 to the Nth power, and N is an integer not greater than 6.

In the above system, the receiving link is used to demodulate, filter and analog-to-digital convert the received signal;

The sending link is used to perform analog-to-digital conversion, filtering and modulation processing on the signal to be sent.

In the above system, the radio frequency front-end module circuit also includes a first radio frequency phase shifter, the input end of the first radio frequency phase shifter is connected to the moving end of the switch, and the output end of the first radio frequency phase shifter is connected to the The bidirectional amplifier connection.

In the above system, the receiving link and the sending link respectively include a frequency synthesizer end;

Both the receiving chain and the frequency synthesizer end in the sending chain include: a local oscillator, a second radio frequency phase shifter, a buffer, and a phase shifter; wherein,

One end of the second radio frequency phase shifter is connected to the output end of the local oscillator, the other end of the second radio frequency phase shifter is connected to the input end of the buffer, and the output end of the buffer is connected to the connected to the input of the phase shifter.

In the above system, the receiving link and the sending link also include a first signal terminal and a second signal terminal respectively; both the first signal terminal and the second signal terminal include a mixer, and the receiving The output terminals of the phase shifters in the link and the transmission chain are respectively connected to the mixers in the first signal terminal and the second signal terminal, and the output terminals of the mixer Connect with the moving end of the switch.

In the third aspect, the embodiment of the present invention also provides a signal processing method, the method is applied to the radio frequency front-end module circuit described in the first aspect of the embodiment of the present invention; the method includes:

controlling the switch to access the receiving link or the transmitting link, so as to conduct the receiving link or the transmitting link;

Based on the control of the switch, perform power amplification processing on the signal of the receiving link or the transmitting link.

In the above method, the power amplification processing of the signal of the receiving link or the transmitting link based on the control of the switch includes:

When controlling the switch to access the transmission link, perform power amplification processing on the signal of the transmission link;

When the switch is controlled to access the receiving link, power amplification processing is performed on the signal of the receiving link.

The radio frequency front-end module circuit provided by the embodiment of the present invention includes: a switch, a bidirectional amplifier and a filter; wherein, the moving end of the switch is connected to the receiving link and the transmitting link; one end of the bidirectional amplifier is connected to the fixed end of the switch, The other end of the bidirectional amplifier is connected to one end of the filter, and the other end of the filter is connected to the off-chip antenna; the switch is used to control the access to the receiving link or the transmitting link, so that the receiving link or the transmitting link is turned on; two-way The amplifier is used for switch-based control to perform power amplification processing on the signal of the receiving link or the transmitting link.

The embodiment of the present invention adopts a bidirectional amplifier, the functional modules of the transmitter channel and the receiver channel of the radio frequency front end are simplified, the power amplifier and the low noise amplifier are combined into one, so that the design efficiency is greatly improved, and the power consumption is also reduced. The position of the transceiver switch is moved back away from the antenna, so that it is located between the bidirectional amplifier and the transceiver mixer. Compared with the traditional architecture located at the output of the transmitter's power amplifier and the input of the receiver's low-noise amplifier, the design requirements for linearity and low noise are greatly reduced, making it a breakthrough in the traditional separation device solution, which is more conducive to integration to the RF front end. The filter position of the receiver replaces the filter position of the transmitter, and provides filtering for both channels at the same time, which not only guarantees the filtering function of the receiver, but also avoids the low-impedance antenna directly connected to the output of the power amplifier, ensuring the power amplifier. High output impedance matching and high output power.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the schematic diagram of the radio frequency front-end module circuit of the embodiment of the present invention;

Figure 2a is a schematic structural diagram of a bidirectional amplifier according to an embodiment of the present invention;

FIG. 2b is a schematic diagram of a power amplifier mode of a bidirectional amplifier according to an embodiment of the present invention;

FIG. 2c is a schematic diagram of a low noise amplifier mode of a bidirectional amplifier according to an embodiment of the present invention;

3 is a schematic diagram of an antenna phased array transceiver system according to an embodiment of the present invention;

4 is a schematic diagram of a four-element antenna phased array transceiver system according to an embodiment of the present invention;

5 is a schematic diagram of a radio frequency front-end phase modulation antenna phased array transceiver system according to an embodiment of the present invention;

6 is a schematic diagram of a frequency synthesizer phase modulation antenna phased array transceiver system according to an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

This embodiment proposes a radio frequency front-end module circuit, Figure 1 is a schematic diagram of a radio frequency front-end module circuit according to an embodiment of the present invention, Figure 2a is a schematic structural diagram of a bidirectional amplifier according to an embodiment of the present invention; Figure 3 is a schematic diagram of an embodiment of the present invention A schematic diagram of an antenna phased array transceiver system; below in conjunction with Fig. 1, Fig. 2a and Fig. 3 for illustration, the circuit 101 includes: a switch 1011, a bidirectional amplifier 1012 and a filter 1013; wherein, the moving end of the switch 1011 is connected to the receiving end Link 1032 and transmission link connection 1031; one end of the bidirectional amplifier 1012 is connected to the fixed end of the switch 1011, the other end of the bidirectional amplifier 1012 is connected to one end of the filter 1013, and the filter The other end of 1013 is connected to the off-chip antenna 102;

The switch 1011 is configured to control access to the receiving link 1032 or the transmitting link 1031, so as to turn on the receiving link 1032 or the transmitting link 1031;

The bidirectional amplifier 1012 is configured to perform power amplification processing on the signal of the receiving link 1032 or the transmitting link 1031 based on the control of the switch 1011 .

It should be noted that the radio frequency front-end module circuit 101 proposed in this embodiment can be applied to a base station in a communication network.

In this embodiment, the switch 1011 may be any type of switch, which is not limited here. As an example, the switch 1011 can be a single-pole double-throw switch. The switch 1011 is composed of a moving end and a non-moving end. It is the so-called non-moving end, which is connected to the device that receives the signal or sends the signal. It is possible to control the output of signals in two different directions or the reception of signals in two different directions. In this embodiment, the switch can be connected to the sending link 1031 or the receiving link 1032 as required to switch between sending and receiving. Exemplarily, the switch 1011 in this embodiment of the present application may be connected to the sending link 1031 or the receiving link 1032 under control of an electrical signal or a signal in another physical form.

The filter 1013 may be a device that effectively filters out a specific frequency point in the power line or frequencies other than the frequency point to obtain an electrical signal of a specific frequency or eliminate an electrical signal of a specific frequency. As an example, the filter 1013 may be a bandpass filter, which retains signals in a specific frequency band and filters out signals outside the specific frequency band. One end of the filter 1013 is connected to one end of the bidirectional amplifier 1012 , and the other end of the filter 1013 is connected to the off-chip antenna 102 .

The structure of the bidirectional amplifier 1012 is shown in Figure 2a, which combines a power amplifier and a low noise amplifier into one, is located between the switch 1011 and the filter 1013, and one end is connected to the fixed end of the switch 1011 , and the other end is connected to one end of the filter 1013 . In FIG. 2 a , M1 to M8 are metal oxide semiconductor field effect transistors (MOSFET, MetalOxide Semiconductor Field Effect Transistor), referred to as MOS transistors. According to the different requirements of power amplifier (PA, power Amplifier) or low noise amplifier (LNA, Low Noise Amplifier), select different modes, and Fig. 2 b is the schematic diagram of the power amplifier mode of the bidirectional amplifier of the embodiment of the present invention; When the switch 1011 When the transmission link 1031 is connected, the bidirectional amplifier 1012 works in the power amplifier mode, as shown in FIG. Signal amplification is carried out through M3 and M4, M5, M6, M7 and M8 are turned off at the same time, and the signal is output to the port (Ti+, Ti-) of the next stage circuit (filter, mixer, etc.) of the PA; when the switch is connected When the receiving link 1032 is connected, the bidirectional amplifier 1012 works in the low noise amplifier mode, and Fig. 2c is a schematic diagram of the low noise amplifier mode of the bidirectional amplifier of the embodiment of the present invention; as shown in Fig. 2c, when working in the LNA mode (LNA Mode) , M7 and M8 are turned on, the signal is amplified through the input terminal (Ri+, Ri-) through M5 and M6, while M1, M2, M3 and M4 are turned off, and the amplified signal is output to the load antenna terminal (Ti+, Ti-).

In the embodiment of the present invention, the bidirectional amplifier adopts a cascode structure, which can significantly increase the signal gain. In the PA working mode, due to the isolation effect of M7 and M8, the leakage current is significantly reduced, so that the output current is greatly increased, and the power gain can be increased from 12dB increase to over 21dB. The directional isolation of the bidirectional PA/LNA is further enhanced due to the function of the second-stage common-gate power amplifier tube of the common-gate structure, and the noise figure of the receiver is further reduced. In LNA mode, the direction of the current output polarity is no longer changed, but from Ri+ to Ti+ as in PA mode, which is conducive to the consistency and efficiency of system module design. At the same time, an additional neutralization capacitor is added to improve the bandwidth.

The radio frequency module circuit 101 in the embodiment of the present invention can be integrated into one chip and realized by one chip. With the bidirectional amplifier 1012, the functional modules of the transmitter channel and the receiver channel of the RF front-end are simplified, and the power amplifier and the low-noise amplifier are combined into one, which can reuse circuit modules, minimize the chip area of the RF front-end module, and save manufacturing costs. At the same time, the design efficiency is greatly improved, and the power consumption is also reduced. The transceiving switch 1011 is moved backward away from the off-chip antenna 102, so that it is located between the bidirectional amplifier 1012 and the transceiving mixer. Compared with the traditional architecture located at the output of the transmitter's power amplifier and the input of the receiver's low-noise amplifier, the design requirements for linearity and low noise are greatly reduced, making it a breakthrough in the traditional separation device solution, which is more conducive to integration to the RF front end. The filter position of the receiver replaces the filter position of the transmitter, and provides filtering for both channels at the same time, which not only guarantees the filtering function of the receiver, but also avoids the low-impedance antenna directly connected to the output of the power amplifier, ensuring the power amplifier. High output impedance matching and high output power.

In some optional embodiments of the present invention, when the switch 1011 is used to control access to the transmission link 1031 , the bidirectional amplifier 1012 is used to perform power amplification processing on the signal of the transmission link 1031 .

In other optional embodiments of the present invention, when the switch 1011 is used to control access to the receiving link 1032, the bidirectional amplifier 1012 is used to perform power amplification processing on the signal of the receiving link 1032 .

Based on the above radio frequency front-end module circuit, an embodiment of the present invention also provides an antenna phased array transceiver system. Fig. 3 is the schematic diagram of the antenna phased array transceiver system of the embodiment of the present invention; As shown in Fig. 3, described system comprises: analog transceiver module 103, radio frequency front-end module circuit 101 and off-chip antenna 102, described radio frequency front-end module group The moving end of the switch 1011 in the circuit 101 is connected to the analog transceiver module 103, and the other end of the filter 1013 in the RF front-end module circuit is connected to the off-chip antenna 102; wherein, the analog transceiver module includes at least Receive link 1032 and send link 1031;

The radio frequency front-end module circuit 103 is used to control the reception link 1032 or the transmission link 1031 connected to the analog transceiver module, and perform signal processing on the reception link or the transmission link Power amplification processing;

The off-chip antenna 102 is used to transmit the signal after power amplification processing by the radio frequency front-end module circuit, or transmit the signal to the radio frequency front-end module circuit.

In the embodiment of the present invention, the analog transceiver module 103 can adopt the system architecture of an intermediate frequency receiver, including digital-to-analog conversion (DAC, Digital-to-Analog Converter), analog-to-digital conversion (ADC, Analog-to-Digital Converter), Anti-aliasing filter, local oscillator, I/Q modulation and demodulator.

The analog transceiving module 103 at least includes a receiving link 1032 and a sending link 1031 . For the receiving chain 1032, the radio frequency high-frequency signal is reduced to the baseband frequency band through the I/Q demodulator and filter, and is then sampled by the ADC to the baseband for signal processing. For the transmission link, the baseband digital signal is modulated into the radio frequency band through DAC digital-to-analog conversion, anti-aliasing filter and I/Q modulation, and sent to the radio frequency front-end module circuit 101, and then transmitted through the off-chip antenna 102.

The radio frequency front-end module circuit 101 is consistent with the foregoing embodiments, and will not be repeated here, and is used to control access to the receiving link 1032 or the sending link 1031 in the analog transceiver module 103, for all performing power amplification processing on the signal of the receiving link 1032 or the transmitting link 1031;

The off-chip antenna 102 is consistent with the foregoing embodiments, and will not be repeated here. The category of the off-chip antenna 102 is not limited here. In this embodiment, it is used for transmission through the radio frequency front-end module circuit 101. The processed signal is amplified by power, or the signal is transmitted to the radio frequency front-end module circuit 101 .

In the embodiment of the present invention, the functional modules of the transmitting channel and the receiving channel of the radio frequency front-end module circuit 101 are simplified, and the power amplifier and the low noise amplifier are combined into one, so that the design efficiency is greatly improved, and the power consumption is also reduced. The position of the transceiving switch 1011 is moved back away from the antenna 102, so that it is located between the bidirectional amplifier and the transceiving mixer. Compared with the traditional architecture located at the output of the transmitter's power amplifier and the input of the receiver's low-noise amplifier, the design requirements for linearity and low noise are greatly reduced, making it a breakthrough in the traditional separation device solution, which is more conducive to integration to the RF front end. The filter position of the receiver replaces the filter position of the transmitter, and provides filtering for both channels at the same time, which not only guarantees the filtering function of the receiver, but also avoids the low-impedance antenna directly connected to the output of the power amplifier, ensuring the power amplifier. High output impedance matching and high output power.

In some optional embodiments of the present invention, the number of the analog transceiver module 101 and the off-chip antenna 102 is the same as the number of the radio frequency front-end module circuit 103, and the number is 2 to the Nth power, N is an integer not greater than 6.

In this embodiment, the number of the analog transceiver module 101 and the off-chip antenna 102 is the same as the number of the radio frequency front-end module circuit 103 . One analog transceiver module 101, one off-chip antenna 102 and one radio frequency front-end module circuit 103 form one antenna unit. Fig. 4 is a schematic diagram of a four-unit antenna phased array transceiver system according to an embodiment of the present invention; The four-element antenna phased array transceiver system. The number of antenna units can be set according to actual use scenarios, and the number is 2 to the Nth power, and the value of N is an integer not greater than 6.

The antenna phased array transceiver system of this embodiment can be applied to a Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) system, and multiple antennas are used at both the transmitting end and the receiving end, and the number is 2 to the Nth power, N The value of is an integer not greater than 6. An antenna system that forms multiple channels between transceivers can greatly increase channel capacity.

In some optional embodiments of the present invention, as shown in FIG. 3 , the receiving link 1032 is used to demodulate, filter and analog-to-digital convert the received signal;

The sending link 1031 is used to perform analog-to-digital conversion, filtering and modulation processing on the signal to be sent.

In this embodiment, in the receiving link, the radio frequency high-frequency signal is reduced to the baseband frequency band through an I/Q demodulator and a filter, and is sampled to the baseband by an ADC for signal processing. The transmission link 1031 modulates the baseband digital signal into the radio frequency band through DAC digital-to-analog conversion, anti-aliasing filter, and I/Q modulation, and sends it to the radio frequency front-end module circuit 101 before transmitting it through the off-chip antenna 102 .

In other optional embodiments of the present invention, FIG. 5 is a schematic diagram of a phased array transceiver system of a radio frequency front-end phase modulation antenna according to an embodiment of the present invention; as shown in FIG. 5 , the radio frequency front-end module circuit 103 also includes a first A radio frequency phase shifter 1014 , the input end of the first radio frequency phase shifter 1014 is connected to the moving end of the switch 1011 , and the output end of the first radio frequency phase shifter 1014 is connected to the bidirectional amplifier 1012 .

In this embodiment, the RF phase modulation of the antenna phased array transceiver system can use RF front-end phase modulation. For the antenna phased array transceiver system using RF front-end phase modulation, only a first RF phase shifter needs to be added to the RF front-end bidirectional transceiver channel The device 1014 is located at the input end of the bidirectional amplifier and the output end of the transceiving switch 1011.

The phase shifter 1014 can be any phase shifter, which is not limited here, and its main function is to adjust the phase shift of the signal by a certain angle according to the actual use scene.

In the embodiment of the present invention, the transceiver channel functional modules of the radio frequency front end are simplified, and the first radio frequency phase shifter 1014 is reduced from the previous receiving channel and the transmitting channel to one in this embodiment. The first radio frequency phase shifter The 1014 takes into account the phase modulation of the transmitter and the receiver. Compared with the traditional architecture, it only needs to be designed once, which is beneficial to shorten the design time, reduce power consumption, and is more conducive to system integration and reduce chip area.

In some optional embodiments of the present invention, FIG. 6 is a schematic diagram of a frequency synthesizer phase modulation antenna phased array transceiver system according to an embodiment of the present invention; as shown in FIG. 6 , the receiving link 1032 and the sending link 1031 respectively include a frequency synthesizer end;

Both the receiving chain 1032 and the frequency synthesizer end in the sending chain 1031 include: a local oscillator 10321, a second radio frequency phase shifter 10322, a buffer 10323 and a phase shifter 10324; wherein,

One end of the second radio frequency phase shifter 10322 is connected to the output end of the local oscillator 10321, the other end of the second radio frequency phase shifter is connected to the input end of the buffer 10323, and the buffer 10323 The output terminal is connected with the input terminal of the phase shifter 10324.

In this embodiment, a frequency synthesizer phase modulation antenna phased array transceiver system is used. As shown in FIG. A phase shifter 10322 is respectively added to the synthesizer, which are respectively located at the output end of a local oscillator (LO, Local Oscillator) 10321 and the input end of a buffer (buffer) 10323 . For the phase shifter system, since the RF signal path does not flow through the phase shifter, the frequency synthesizer can achieve approximately zero gain change, which reduces the impact on system gain change and reduces the complexity of system design, power consumption and cost. . Since the phase shifter works at the frequency synthesizer end, the RF signal path does not flow through the phase shifter, so the frequency synthesizer end does not need to achieve broadband response, so the phase error can be reduced.

In other optional embodiments of the present invention, the receiving link 1032 and the sending link 1031 further include a first signal terminal and a second signal terminal respectively; the first signal terminal and the second signal terminal Each terminal includes a mixer, and the output terminals of the phase shifter in the receiving chain and the sending chain are respectively connected with the mixers in the first signal terminal and the second signal terminal connected, the output end of the mixer is connected to the moving end of the switch 1011 .

In the embodiment of the present invention, as shown in FIG. 6 , the first signal terminal and the second signal terminal of the receiving chain 1032 sequentially include from left to right: a DAC, a filter, a variable gain amplifier (VGA, Variable Gain Amplifier) and a mixer; the first signal end and the second signal end of the transmission link 1031 include, from left to right, an ADC, a filter, a VGA, and a mixer.

Based on the foregoing embodiments, the embodiment of the present invention also provides a signal processing method, the method is applied in a radio frequency front-end module circuit; the method includes:

controlling the switch to access the receiving link or the transmitting link, so as to conduct the receiving link or the transmitting link;

Based on the control of the switch, perform power amplification processing on the signal of the receiving link or the transmitting link.

In this embodiment, the control switch can control access to the receiving link or the transmitting link according to the actual use scenario, so that the receiving link or the transmitting link is turned on; The signal of the link is subjected to power amplification processing.

In some optional embodiments of the present invention, the performing power amplification processing on the signal of the receiving link or the transmitting link based on the control of the switch includes:

When controlling the switch to access the transmission link, perform power amplification processing on the signal of the transmission link;

When the switch is controlled to access the receiving link, power amplification processing is performed on the signal of the receiving link.

In this embodiment, when the switch is controlled to access the transmission link, power amplification processing is performed on the signal of the transmission link; when the switch is controlled to access the reception link, the signal of the reception The signal of the link is subjected to power amplification processing.

It should be noted that the information processing method provided by the above embodiments belongs to the same concept as the embodiment of the radio frequency front-end module circuit or the antenna phased array transceiver system, and may be based on different compositions of the radio frequency front-end module circuit or the antenna phased array transceiver system structure and perform corresponding processing. For the specific implementation process, refer to the embodiment of the radio frequency front-end module circuit or the antenna phased array transceiver system.

The methods disclosed in several method embodiments provided in this application can be combined arbitrarily to obtain new method embodiments under the condition of no conflict.

The features disclosed in several product embodiments provided in this application can be combined arbitrarily without conflict to obtain new product embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention can be integrated into one processing unit, or each unit can be used as a single unit, or two or more units can be integrated into one unit; the above-mentioned integration The unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (11)

1. A radio frequency front end module circuit, the circuit comprising: switches, bi-directional amplifiers and filters; the movable end of the switch is connected with the receiving link and the transmitting link; one end of the bidirectional amplifier is connected with the fixed end of the switch, the other end of the bidirectional amplifier is connected with one end of the filter, and the other end of the filter is connected with the external antenna;

the switch is used for controlling access to the receiving link or the transmitting link so as to enable the receiving link or the transmitting link to be conducted;

and the bidirectional amplifier is used for carrying out power amplification processing on the signals of the receiving link or the transmitting link based on the control of the switch.

2. The circuit of claim 1, wherein the bi-directional amplifier is configured to power amplify the signal of the transmit chain when the switch is configured to control access to the transmit chain.

3. The circuit of claim 1, wherein the bi-directional amplifier is configured to power amplify the signal of the receive chain when the switch is configured to control access to the receive chain.

4. An antenna phased array transceiver system, the system comprising: an analog transceiver module, the rf front-end module circuit according to any one of claims 1 to 3, and an off-chip antenna, wherein a moving terminal of a switch in the rf front-end module circuit is connected to the analog transceiver module, and another terminal of a filter in the rf front-end module circuit is connected to the off-chip antenna; the analog transceiver module at least comprises a receiving link and a transmitting link;

the radio frequency front end module circuit is used for controlling the receiving link or the sending link accessed into the analog transceiving module and carrying out power amplification processing on signals of the receiving link or the sending link;

the off-chip antenna is used for transmitting signals after power amplification processing is carried out on the radio frequency front end module circuit, or transmitting signals to the radio frequency front end module circuit.

5. The system of claim 4, wherein the number of the analog transceiver modules, the off-chip antennas and the rf front-end module circuits is the same, the number is a power N of 2, and N is an integer no greater than 6.

6. The system of claim 4,

the receiving link is used for demodulating, filtering and carrying out analog-to-digital conversion processing on the received signals;

the transmission link is used for carrying out analog-to-digital conversion, filtering and modulation processing on a signal to be transmitted.

7. The system of any one of claims 4 to 6, further comprising a first RF phase shifter in the RF front end module circuit, wherein an input of the first RF phase shifter is connected to the moving end of the switch, and an output of the first RF phase shifter is connected to the bi-directional amplifier.

8. The system according to any one of claims 4 to 6,

the receiving link and the transmitting link respectively comprise a frequency synthesizer end;

the frequency synthesizer in the receiving chain and the transmitting chain respectively comprises: the local oscillator, the second radio frequency phase shifter, the buffer and the phase shifter; wherein,

one end of the second radio frequency phase shifter is connected with the output end of the local oscillator, the other end of the second radio frequency phase shifter is connected with the input end of the buffer, and the output end of the buffer is connected with the input end of the phase shifter.

9. The system of claim 8, wherein the receive chain and the transmit chain further comprise a first signal end and a second signal end, respectively; the first signal end and the second signal end both comprise mixers, output ends of the phase shifters in the receiving chain and the sending chain are respectively connected with the mixers in the first signal end and the second signal end, and output ends of the mixers are connected with a movable end of the switch.

10. A signal processing method, wherein the method is applied to the rf front-end module circuit according to any one of claims 1 to 3; the method comprises the following steps:

the control switch is connected to a receiving link or a transmitting link so as to enable the receiving link or the transmitting link to be conducted;

and performing power amplification processing on the signals of the receiving link or the transmitting link based on the control of the switch.

11. The method of claim 10, wherein the performing power amplification processing on the signal of the receiving link or the transmitting link based on the control of the switch comprises:

when the switch is controlled to be accessed to the transmitting link, the signal of the transmitting link is subjected to power amplification processing;

and when the switch is controlled to be accessed to the receiving link, performing power amplification processing on the signal of the receiving link.

Images