Phased Array Antenna System with Adaptive Frequency Selection

Abstract

The present invention provides a phased array antenna system with adaptive frequency selection, which is applied to the field of wireless communication technology. The phased array antenna system includes a digital processing circuit, a radio frequency channel, a detection channel and an antenna array. The antenna array includes multiple phase shifters and multiple antenna radiators. The digital processing circuit is connected to the radio frequency channel, and the radio frequency channel is respectively connected to the multiple antenna radiators through multiple phase shifters. The input end of the detection channel is respectively connected to the multiple phase shifters, and the output end of the detection channel is connected to the digital processing circuit. Among them, the digital processing circuit is used to: when the phased array antenna system operates in a first frequency band, control the antenna array to transmit or receive a radio frequency signal located in the first frequency band based on a first hardware parameter. Multiple first channel detection signals corresponding to the transmission paths of multiple phase shifters are obtained from the detection channel in sequence; the hardware parameters of the antenna array when the phased array antenna operates in the first frequency band are adjusted according to the first channel detection signal.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna radio frequency circuits, and in particular to a phased array antenna system with adaptive frequency selection. Background Art

[0002] As wireless communications evolve from 5G communications to 5.5G communications or 6G communications, the operating carrier frequency of the radio frequency signal of wireless communications gradually evolves from the SUB 6GHz band of 5G communications to the higher UP 6GHz band. As the operating frequency increases, the spatial propagation loss of electromagnetic waves increases, and the macro station side needs to have a higher equivalent isotropic radiated power (EIRP) to compensate for the path loss. There are currently two main technical paths to increase EIRP, one is to increase the transmit power of the power amplifier, and the other is to increase the antenna gain. Since increasing the transmit power of the power amplifier will increase the power consumption of the RF module of the base station, there is a greater constraint on increasing the transmit power of the power amplifier. Therefore, in the evolution to the higher UP 6GHz, increasing the antenna gain of the base station is the main effective means to increase EIRP.

[0003] In the application of phased array antennas, multiple antenna radiators (or sub-antennas) in the phased array antenna are equipped with corresponding phase shifters. Different signal phase shift amounts are configured for different antenna radiators through phase shifters, so that the RF signals emitted by multiple antenna radiators can achieve beamforming. Through beamforming, RF signals with greater gain are obtained to improve communication quality. However, in the application of phased array antennas, one RF module corresponds to multiple sub-antennas, and the RF signals emitted by multiple sub-antennas form beams. The increase in the number of sub-antennas will cause the beam corresponding to an RF channel to become narrower. In order to achieve full airspace coverage, it is necessary to time-share multiple beams of the phased array antenna. This increases the time cost of measuring antenna signals. In addition, when transmitting RF signals based on phased array antennas, RF signals in different frequency bands have different frequency responses, so that the required phase and amplitude parameters are different. In the field of microwave technology, parameters such as phase affect the transmission impedance of the transmitted RF signal, and the impedance matching directly determines the quality of wireless communication. Therefore, when phased array antennas realize wireless communication based on RF signals of different frequency bands, how to implement adaptive frequency selection control in multiple frequency bands to achieve efficient communication is a major problem. Summary of the invention

[0004] The embodiment of the present invention provides a phased array antenna system with adaptive frequency selection, which realizes adaptive frequency selection control of the phased array antenna system in multiple frequency bands.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] An embodiment of the present invention provides a phased array antenna system with adaptive frequency selection, which includes a digital processing circuit, a radio frequency channel, a detection channel and an antenna array. The antenna array includes multiple phase shifters and multiple antenna radiators. The digital processing circuit is connected to the radio frequency channel, and the radio frequency channel is respectively connected to the multiple antenna radiators through multiple phase shifters. The input end of the detection channel is respectively connected to the multiple phase shifters, and the output end of the detection channel is connected to the digital processing circuit. Among them, the digital processing circuit is used to: when the phased array antenna system operates in a first frequency band, output a first control signal to the antenna array, the first control signal corresponds to the first frequency band, and the first control signal is used to control the antenna array to transmit or receive a radio frequency signal located in the first frequency band based on a first hardware parameter; obtain multiple first channel detection signals corresponding to the transmission paths of multiple phase shifters from the detection channel in sequence; output a first adjustment signal to the antenna array according to the multiple first channel detection signals, and the first adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the first frequency band; the hardware parameters include at least one of the phase shift value and amplitude of the antenna array.

[0007] In a possible implementation, the digital processing circuit is also used to: when the phased array antenna system switches from operating in a first frequency band to operating in a second frequency band, output a second control signal to the antenna array, the second control signal corresponds to the second frequency band, and the second control signal is used to control the antenna array to transmit or receive a radio frequency signal in the second frequency band based on second hardware parameters; sequentially obtain multiple second channel detection signals corresponding to transmission paths of multiple phase shifters from the detection channel; and output a second adjustment signal to the antenna array based on the multiple second channel detection signals, and the second adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the second frequency band.

[0008] In a possible implementation, the digital processing circuit is also used to: when the phased array antenna system operates in the first frequency band and the second frequency band, output a third control signal to the antenna array, the third control signal is used to control the antenna array to transmit or receive radio frequency signals located in the first frequency band and / or the second frequency band based on a third pin parameter, and sequentially obtain multiple first channel detection signals corresponding to the transmission paths of multiple phase shifters from the detection channel; output a third adjustment signal to the antenna array according to the multiple first channel detection signals, the third adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the first frequency band and the second frequency band.

[0009] In one possible implementation, the RF channel includes an RF transmission channel, and the RF transmission channel includes a multi-frequency shared power amplifier; the input end of the multi-frequency shared power amplifier is connected to the digital processing circuit, and the output end of the multi-frequency shared power amplifier is connected to multiple antenna radiators through multiple phase shifters respectively; the multi-frequency shared power amplifier is used to amplify the power of RF signals in multiple different frequency bands.

[0010] In a possible implementation, the multi-frequency shared power amplification branch includes a first main amplification branch, a second main amplification branch, a first shared slave amplification branch, a second shared slave amplification branch, a first coupler, and a second coupler. The first end of the first coupler is used to input a radio frequency signal of a first frequency band, the second end of the first coupler is used to input a radio frequency signal of a second frequency band, the third end of the first coupler is connected to the input end of the first shared slave amplification branch, and the fourth end of the first coupler is connected to the input end of the second shared slave amplification branch. The output end of the first shared slave amplification branch is connected to the second end of the second coupler, and the output end of the second shared slave amplification branch is connected to the second end of the second coupler. The input end of the first main amplification branch is used to input a radio frequency signal of a first frequency band, and the output end of the first main amplification branch is coupled with the third end of the second coupler to serve as the output end of the multi-frequency shared power amplification branch with respect to the radio frequency signal of the first frequency band. The input end of the second main amplification branch is used to input a radio frequency signal of a second frequency band, and the output end of the second main amplification branch is coupled with the fourth end of the second coupler to serve as the output end of the multi-frequency shared power amplification branch with respect to the radio frequency signal of the second frequency band.

[0011] In a possible implementation, the first main amplifier branch includes a first main amplifier and a first impedance inverter line. The second main amplifier branch includes a second main amplifier and a second impedance inverter line. The input end of the first main amplifier is used to input a radio frequency signal of a first frequency band, and the output end of the first main amplifier is coupled to the third end of the second coupler through the first impedance inverter line. The input end of the second main amplifier is used to input a radio frequency signal of a second frequency band, and the output end of the second main amplifier is coupled to the fourth end of the second coupler through the second impedance inverter line. For the first coupler or the second coupler, the first end and the second end of the coupler are mutually isolated ends, the third end and the fourth end are mutually isolated ends, the second end and the third end are mutually straight-through ends, and the first end and the fourth end are mutually straight-through ends.

[0012] In one possible implementation, the digital processing circuit is used to: output a gate control signal to a multi-frequency shared power amplifier branch based on the amount of data carried by the radio frequency signal per unit time, and the gate control signal is used to adjust the gate bias voltage of the power tube of the first main amplifier and / or the second main amplifier in the multi-frequency shared power amplifier branch.

[0013] In a possible implementation, for a power tube, the gate control signal is specifically used to: when the RF signal does not carry valid data information, control the corresponding gate bias voltage to be zero; when the valid data information carried by the RF signal is lower than the first data threshold, control the corresponding gate bias voltage to be in a first voltage state; when the valid data information carried by the RF signal is greater than the first data threshold and less than the second data threshold, control the corresponding gate bias voltage to be in a second voltage state. The gate bias voltage of each power tube in the first voltage state is less than the gate bias voltage in the second voltage state. The gate bias voltages of different power tubes in the same voltage state are the same or different.

[0014] In a possible implementation, the phased array antenna system further includes a single-pole multi-throw switch, and the detection channel is connected to the multiple phase shifters respectively through the single-pole multi-throw switch.

[0015] In a possible implementation manner, the first channel detection signal includes a channel measurement reference signal and reflection coefficient detection information.

[0016] The above embodiments have the following beneficial effects:

[0017] Beneficial effect 1. The phased array antenna transmits RF signals based on multiple radiator antennas at the same time, which can form a beam with stronger antenna gain based on beamforming, but it will also cause the beam coverage to become narrower. When the phased array antenna system is working, it is necessary to switch to more different directions to poll in order to detect the channel status of each antenna of the phased array, which is time-consuming. Based on the detection channel, the signal of each channel status can be collected to quickly detect the channel status of the antenna and make adjustments based on the detection.

[0018] Beneficial effect 2. Different working frequency bands of RF signals require different hardware parameters to ensure the normal wireless communication. Before the product leaves the factory, experiments are conducted based on the hardware parameter design, working frequency band, etc. of the product, and a corresponding hardware parameter (such as the first hardware parameter and the second hardware parameter, etc.) is selected for different frequency bands. Because the actual antenna benefit is affected by various complex factors when the antenna system interacts with RF signals, such as the intermodulation effect between adjacent antennas, the frequency response and impedance mismatch caused by the conversion of different frequency bands, and the environmental climate and usage of the product. Therefore, in actual applications, the hardware parameters designed in theory are not the hardware parameters that can achieve the maximum antenna gain. By selecting a corresponding hardware parameter for experiments in different frequency bands. The hardware parameter needs to ensure that in most applications, the phased array antenna system has a considerable gain (at least to ensure that the device can operate normally). Then, based on the detection channel, a small number of RF signals between the RF channel and the phase shifter are obtained by branching in the transmission state, and the relevant channel states (such as impedance matching information and signal transmission coefficient information, etc.) between the corresponding transmission paths can be detected based on the RF signals to be transmitted obtained by the small number of branching. These related status information can provide intuitive feedback on the current communication quality, etc. The digital processing circuit can adjust the hardware parameters based on this information to optimize the corresponding channel status under different frequency bands, thereby improving the antenna gain. At the same time, each frequency band corresponds to a fixed hardware parameter. Based on the working state under the hardware parameter as the initial detection data state, the calculation accuracy of the algorithm can be improved, and the benchmark of multiple calculations can be improved.

[0019] Beneficial effect 3. Power amplification of RF signals of different frequency bands is achieved based on a multi-frequency shared power amplifier. With the development of wireless communication technology, the amount of data information that needs to be carried on RF signals has also increased rapidly. With this comes an increase in the bandwidth demand for RF signals. In order to ensure the efficiency of high peak-to-average ratio RF signal power amplification, it is necessary to increase the power backoff as much as possible. The power amplifier is the device that consumes the most power in the transmitting device. When the power is backed off in large quantities, how to ensure that the power amplifier maintains a high efficiency is a major problem. At the same time, in the design of the power amplifier, improving the backoff efficiency and expanding the working bandwidth are contradictory requirements, and both have certain design difficulties. The design of high-power, wide-bandwidth, large backoff and high-efficiency power amplifiers has always been a problem in the industry. Based on the output power division characteristics and phase shift characteristics of the two couplers, a dual-frequency shared Doherty power amplifier architecture can be designed. High-power, wide-bandwidth, large backoff and high-efficiency power amplification can be provided for each frequency band while achieving compatibility of dual-frequency RF signals.

[0020] Beneficial effect 4. As wireless radio frequency evolves towards 5.5G communication or 6G communication, the power consumption of power amplifier devices is getting bigger and bigger. In wireless communication systems, power amplifier devices account for the largest proportion of power consumption. With the development of wireless communication, the requirements for bandwidth, frequency and data volume are getting bigger and bigger. How to reduce power consumption has become a top priority in the design of wireless communication systems. In the provisions of wireless communication standards, data is compiled according to the signal symbol level and carried on the wireless carrier signal. The amount of data on each signal symbol is known to the digital processing circuit. There is a positive correlation between the amount of data in the signal symbol and the signal power of the RF signal. In current wireless communications, no matter how much data is, in order to ensure the normal operation of communication, power amplifier devices are operated at full load as much as possible, which will cause a lot of power consumption waste. Because at the power device level, it is very difficult to finely control and adjust the signal power of the RF signal. In the embodiment of the present invention, because the digital processing circuit knows the data amount of each signal symbol in advance when performing data compilation and modulation and other processing, the digital processing circuit can be improved at the software level so that the digital processing circuit outputs a gate control signal according to the real-time data amount of the signal symbol to adjust the gate bias voltage of the power tube, thereby reducing the gate bias voltage to reduce power consumption while ensuring normal wireless communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the principle of beamforming;

[0022] Figure 2 It is a basic structural schematic diagram of a power amplifier device;

[0023] Figure 3 A schematic diagram of a phased array antenna system provided in an embodiment of the present invention Figure 1 ;

[0024] Figure 4 A schematic diagram of a phased array antenna system provided in an embodiment of the present invention Figure 2 ;

[0025] Figure 5 A schematic diagram of a phased array antenna system provided in an embodiment of the present invention Figure 3 ;

[0026] Figure 6 It is a structural schematic diagram of a Doherty power amplifier architecture;

[0027] Figure 7 A schematic diagram of a multi-frequency shared power amplifier provided in an embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0028] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present invention are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0029] The terms "exemplary" or "for example" and the like in the embodiments of the present invention are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific way.

[0030] The terms "coupling" and "connection" involved in the embodiments of the present invention should be understood in a broad sense. For example, they may refer to a physical direct connection, or an indirect connection achieved through electronic devices, such as a connection achieved through a resistor, inductor, capacitor or other electronic devices.

[0031] First, some basic concepts involved in the embodiments of the present invention are explained:

[0032] Equivalent isotropic radiated power (EIRP): Also known as effective isotropic radiated power, it represents the relative antenna gain of the transmitting antenna relative to the antenna gain of an isotropic radiating element multiplied by the net power received by the antenna from the connected transmitter in a given direction. The power radiated by the transmitting antenna of a satellite or earth station in the axis of the center of the beam is called the effective isotropic radiated power of the transmitting device, that is, the product of the power supplied to the antenna of the radio transmitter and the absolute gain of the antenna in a given direction. It is an important indicator of the transmission capability of an earth station or repeater. An ideal omnidirectional antenna with the same unit gain in all directions is usually used as a reference antenna for wireless communication systems. EIRP is defined as: EIRP = Pt*Gt, where Pt represents the net power received from the connected transmitter and Gt represents the antenna gain of the transmitting antenna. It represents the transmission power that can be obtained by the transmitter in the direction of maximum antenna gain compared to an omnidirectional antenna.

[0033] Antenna gain: refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna radiates the input power in a concentrated manner. The gain is obviously closely related to the antenna pattern. The narrower the main lobe of the pattern and the smaller the side lobe, the higher the gain. Antenna gain is used to measure the ability of an antenna to send and receive signals in a specific direction. It is one of the most important parameters for selecting base station antennas. Generally speaking, the improvement of gain mainly relies on reducing the beam width of the vertical radiation while maintaining omnidirectional radiation performance in the horizontal plane. Antenna gain is extremely important to the operating quality of the communication system because it determines the signal level at the edge of the cell. Increasing the gain can increase the coverage of the network in a certain direction, or increase the gain margin within a certain range. Any cellular system is a two-way process. Increasing the gain of the antenna can simultaneously reduce the gain budget margin of the two-way system. Under the same conditions, the higher the gain, the farther the radio wave propagates.

[0034] Beam: refers to the shape of the electromagnetic waves emitted by the antenna on the surface of the earth. It can also be understood as the main lobe of the antenna array radiation pattern.

[0035] Beam width: refers to the angular width on both sides of the maximum radiation direction when the power density relative to the maximum radiation direction drops to half, also called 3dB beam width. The half-power beam width in the horizontal plane is called the horizontal beam width; the half-power beam width in the vertical plane is called the vertical beam width.

[0036] Beamforming refers to the process of transmitting the same RF signal based on two or more sub-antennas at the same time, configuring a phase shifting structure for some or all of the two or more sub-antennas, and performing phase shifting processing on the RF signals transmitted by the corresponding sub-antennas based on the phase shifting structure, so that the phases of the RF signals transmitted by some or all of the multiple sub-antennas are different. RF signals with different phases will form a directional beam with stronger gain based on the principle of wave interference in the air, and wireless communication will be carried out based on the formed beam. RF signals are electromagnetic wave signals. When two RF signals meet in space, if the peaks of the two electromagnetic waves meet, an electromagnetic wave signal with enhanced peaks will be obtained. Similarly, the meeting of troughs will also achieve trough enhancement, showing coherent constructive characteristics. Conversely, if the peaks and troughs of two RF signals meet, they will cancel each other out, showing coherent destructive characteristics. Taking the example of two sub-antennas transmitting RF signals respectively, where the dotted waveform represents the trough of the RF signal and the solid waveform represents the peak of the RF signal, it can be seen that the RF signals transmitted by the two sub-antennas will show a beamforming effect in the transmission direction, thereby forming a directional antenna. However, in the application scenario of the phased array antenna, as the number of sub-antennas increases, the transmitted RF signal beam is more concentrated, which will sacrifice a certain coverage range of the phased array antenna. In order to achieve signal coverage of the entire airspace, it is necessary to change the phase shift value of the phase shift structure of the phased array antenna so that the beam transmission direction (i.e., the radiation pattern) of the phased array antenna changes, and the entire airspace is covered by switching the beam.

[0037] Power amplifier: Power amplifiers can be divided into power tube type power amplifiers and switch type power amplifiers. Power tube type power amplifiers can be further divided into Class A power amplifiers, Class B power amplifiers, Class AB power amplifiers and Class C power amplifiers. Among them, Class A power amplifiers, Class B power amplifiers and Class AB power amplifiers are linear power amplifiers. Class C power amplifiers are nonlinear power amplifiers. Class A power amplifiers have the best linearity and are suitable for power amplification of small DC signals. Class B power amplifiers work in half cycles. Single-ended Class B power amplifiers will produce a lot of nonlinear distortion. They are rarely used in power amplification of RF signals. They are usually based on two Class B power amplifiers to form a push-pull structure to form positive and negative half cycles, which are used for power amplification of audio signals. Class AB power amplifiers are a combination of Class A power amplifiers and Class B power amplifiers. The efficiency and linearity of Class AB power amplifiers are between Class A power amplifiers and Class B power amplifiers, and they are widely used in power amplification of RF signals. Class C power amplifiers are nonlinear and are often used in multi-channel power amplifier structures for power synthesis. Such as Figure 2As shown in FIG. 1 , a basic structure of a single power tube type power amplifier is shown. In the figure, a gate bias circuit P1 is provided at the gate of the amplifying power tube M, and a drain bias circuit P2 is provided at the drain of the amplifying power tube M. The bias state between the electrodes of the amplifying power tube M is controlled by the gate bias circuit P1 and the drain bias circuit P2, so that the amplifying power tube M is in a power amplifying state. The amplifying power tube M in the power amplifying state can perform power amplification on the input signal.

[0038] Power backoff of power amplifier: With the development of wireless communication technology, the modulation technology of RF signals has gradually become more complex, which makes the peak to average power ratio (PAPR) of the output RF signal larger. The RF signal input to the power amplifier is a modulated signal obtained by modulating data information onto a carrier signal. The amount of power backoff is related to the peak to average power ratio of the modulated signal.

[0039] Working efficiency of power amplifier: The working efficiency of power amplifier can be reflected by the drain working efficiency of power tube M, that is, the proportion of drain DC provided by the system converted into the RF signal actually output by the power amplifier. The working efficiency of power amplifier will decrease as the output power decreases.

[0040] Embodiment 1:

[0041] An embodiment of the present invention provides a phased array antenna system, such as Figure 3As shown, the phased array antenna system 1000 includes a digital processing circuit 100, a radio frequency channel 200 and an antenna array 300. The digital processing circuit 100 includes a baseband processing circuit 110 and an intermediate frequency processing circuit 120. The radio frequency channel 200 includes a radio frequency transmission channel 210 and a radio frequency receiving channel 220. The antenna array 300 includes a plurality of phase shifters 310 and a plurality of antenna radiators 320. The baseband processing circuit 110 is connected to the intermediate frequency processing circuit 120. The intermediate frequency processing circuit 120 is respectively connected to the input end of the radio frequency transmission channel 210 and the output end of the radio frequency receiving channel 220. The output end of the radio frequency transmission channel 210 and the input end of the radio frequency receiving channel 220 are respectively connected to the plurality of antenna radiators 320 through a plurality of phase shifters 310. Among them, the baseband processing circuit 110 can carry the relevant service information on the baseband signal and modulate the baseband signal to obtain the intermediate frequency signal. The baseband processing circuit 100 transmits the intermediate frequency signal to the intermediate frequency processing circuit 120. The intermediate frequency processing circuit 120 performs up-conversion and mixing processing on the intermediate frequency signal to obtain a radio frequency signal. The radio frequency signal is obtained from the intermediate frequency processing circuit 120 through the radio frequency transmission channel 210 of the radio frequency channel 200. After the radio frequency signal is subjected to relevant power amplification and bandpass filtering, the radio frequency signal to be transmitted is subjected to phase shift processing through multiple phase shifters 310 of the antenna array 300, and then transmitted through different antenna radiators 320. Among them, one phase shifter 310 can correspond to one or more antenna radiators 320. The radio frequency signals transmitted by multiple antenna radiators 320 have different phases, and beamforming can be realized in free space to form a beam with greater antenna gain and longer transmission distance. According to different communication directional patterns, different phase shift values ​​can be set for the phase shifter 310 to realize scanning in different transmission directions. Similarly, multiple antenna radiators 320 can also obtain radio frequency signals from free space, and after low-noise power amplification and filtering processing of the received radio frequency signals through the radio frequency receiving channel 220, they are transmitted to the intermediate frequency processing circuit 120. The intermediate frequency processing circuit 120 performs down-conversion mixing on the received RF signal, obtains the intermediate frequency signal and transmits it to the baseband processing circuit 110. The baseband processing circuit 110 demodulates the received intermediate frequency signal to obtain the data information carried by the received RF signal. The transmitting link and the receiving link in the phased array antenna system 1000 are based on duplex communication, and the transmission and reception are based on alternating different time slots. The hardware such as the antenna array 300 can be reused to realize the transmission and reception functions.

[0042] As wireless communications evolve from 5G communications to 5.5G communications or 6G communications, the operating carrier frequency of the radio frequency signal of wireless communications gradually evolves from the SUB 6GHz band of 5G communications to the higher UP 6GHz band. As the operating frequency increases, the spatial propagation loss of electromagnetic waves increases, and the macro station side needs to have a higher equivalent isotropic radiated power (EIRP) to compensate for the path loss. There are currently two main technical paths to increase EIRP, one is to increase the transmit power of the power amplifier, and the other is to increase the antenna gain. Since increasing the transmit power of the power amplifier will increase the power consumption of the RF module of the base station, there is a greater constraint on increasing the transmit power of the power amplifier. Therefore, in the evolution to the higher UP 6GHz, increasing the antenna gain of the base station is the main effective means to increase EIRP.

[0043] In the application of phased array antennas, multiple antenna radiators (or antenna radiators) in the phased array antenna are configured with corresponding phase shifters. Different signal phase shift amounts are configured for different antenna radiators through phase shifters, so that the RF signals emitted by multiple antenna radiators can achieve beamforming (beamforming), and a RF signal with greater gain is obtained through beamforming to improve communication quality. However, in the phased array antenna application solution, one RF module corresponds to multiple antenna radiators, and the RF signals emitted by multiple antenna radiators form a beam. The increase in the number of antenna radiators will cause the beam corresponding to an RF channel to become narrower. In order to achieve full airspace coverage, it is necessary to time-share multiple beams of the phased array antenna. This increases the time cost of measuring antenna signals. In addition, when transmitting RF signals based on phased array antennas, the phased array antenna system 1000 can operate in different frequency bands. When the phased array antenna system 1000 operates in different frequency bands, the RF signals in different frequency bands have different frequency responses, so that the required phase and amplitude parameters are different. In the field of microwave technology, parameters such as phase affect the transmission impedance of the transmitted RF signal, and the impedance matching directly determines the quality of wireless communication. At the same time, for RF signals of different frequencies, the corresponding power amplifier devices need to be matched and designed in the RF transmission channel 210. Corresponding phase shift design is also required. Therefore, when the phased array antenna realizes wireless communication based on RF signals of different frequency bands, how to realize adaptive frequency selection control in multiple frequency bands to achieve efficient communication is a major problem.

[0044] In order to realize the phased array antenna system with adaptive frequency selection, such as Figure 4As shown, the phased array antenna system 1000 also includes a detection channel 400. The input end of the detection channel 400 is respectively connected to a plurality of phase shifters 310, and the output end of the detection channel 400 is connected to the intermediate frequency processing circuit 120 of the digital processing circuit 100. In an embodiment of the present invention, in the working state of the phased array antenna system 1000 transmitting or receiving, channel detection signals of a plurality of transmission channels corresponding to the plurality of phase shifters 310 are obtained based on the detection channel 400. The channel state of the phased array system 1000 when operating in different frequency bands is detected by the channel detection signal to match and adjust the corresponding hardware parameters. In this way, the rapid detection of channels corresponding to different antenna radiators 320 can be reduced, and there is no need to sequentially poll and detect the channel state of different channels, so as to adaptively and quickly adjust the hardware parameters under different frequency bands. The specific implementation method is: before the product leaves the factory, experiments are conducted based on the hardware parameter design of the product, the working frequency band, etc., and a corresponding hardware parameter is selected for different frequency bands. When the antenna system is interacting with RF signals, the actual antenna benefit is affected by various complex factors, such as the intermodulation effect between adjacent antennas, the frequency response and impedance mismatch caused by the conversion of different frequency bands, and the environmental climate and usage of the product. Therefore, in actual applications, the hardware parameters of theoretical design are not the hardware parameters that can achieve the maximum antenna gain. By selecting a corresponding hardware parameter for experiments in different frequency bands. The hardware parameters need to ensure that in most applications, the phased array antenna system 1000 has a considerable gain (at least to ensure that the device can operate normally). Then, based on the detection channel 400, a small number of RF signals between the RF channel 200 and the phase shifter 310 are obtained by branching in the transmission state, and the relevant channel states between the corresponding transmission paths (such as impedance matching information and signal transmission coefficient information, etc.) can be detected based on the RF signals to be transmitted obtained by the small number of branches. These related status information can intuitively feedback the current communication quality, etc. The baseband processing circuit 110 in the digital processing circuit 100 can adjust the hardware parameters based on this information to optimize the corresponding channel state under different frequency bands, thereby improving the antenna gain. At the same time, each frequency band corresponds to a fixed hardware parameter. Based on the working state under the hardware parameter as the initial detection data state, the calculation accuracy of the algorithm can be improved, and the benchmark of multiple calculations can be improved. Similarly, when the antenna array 300 receives the RF signal, the state of the received RF signal can also be detected. At the same time, the phased array antenna system 1000 on the base station side can obtain the RF signal on the terminal user side to detect the channel communication quality between the base station side and the terminal user side (for example, detecting the reference pilot signal strength, etc.) so as to adjust the hardware parameters according to the detection results to adjust the antenna gain for transmission and reception.

[0045] Taking the phased array antenna system 1000 having two operating frequency bands, the first frequency band and the second frequency band, as an example, the phased array antenna system 1000 can have multiple different operating states, and three operating states are used as examples below:

[0046] Working state 1, the phased array antenna system 1000 works in the first frequency band. At this time, the baseband processing circuit 110 of the digital processing circuit 100 is used to: output a first control signal to the antenna array 300, the first control signal corresponds to the first frequency band, and the first control signal is used to control the antenna array 300 to transmit or receive a radio frequency signal located in the first frequency band based on the first hardware parameter; sequentially obtain multiple first channel detection signals corresponding to the transmission paths of multiple phase shifters 310 from the detection channel 400; output a first adjustment signal to the antenna array 300 according to the multiple first channel detection signals, and the first adjustment signal is used to adjust the hardware parameters of the antenna array 300 when the phased array antenna works in the first frequency band; the hardware parameters include at least one of the phase shift value and amplitude of the antenna array 300. Exemplarily, the first channel detection signal includes a channel measurement reference signal and reflection coefficient detection information.

[0047] Working state 2: when the phased array antenna system 1000 switches from working in the first frequency band to working in the second frequency band. At this time, the baseband processing circuit 110 of the digital processing circuit 100 is used to: output a second control signal to the antenna array 300, the second control signal corresponds to the second frequency band, and the second control signal is used to control the antenna array 300 to transmit or receive a radio frequency signal located in the second frequency band based on the second hardware parameter; obtain multiple second channel detection signals corresponding to the transmission paths of multiple phase shifters 310 from the detection channel 400 in sequence; output a second adjustment signal to the antenna array 300 according to the multiple second channel detection signals, and the second adjustment signal is used to adjust the hardware parameters of the antenna array 300 when the phased array antenna works in the second frequency band.

[0048] Working state three, when the phased array antenna system 1000 operates in the first frequency band and the second frequency band. At this time, the baseband processing circuit 110 of the digital processing circuit 100 is used to: output a third control signal to the antenna array 300, the third control signal is used to control the antenna array 300 to transmit or receive a radio frequency signal located in the first frequency band and / or the second frequency band based on the third pin parameter, and sequentially obtain multiple first channel detection signals corresponding to the transmission paths of multiple phase shifters 310 from the detection channel 400; output a third adjustment signal to the antenna array 300 according to the multiple first channel detection signals, and the third adjustment signal is used to adjust the hardware parameters of the antenna array 300 when the phased array antenna operates in the first frequency band and the second frequency band.

[0049] Exemplarily, the baseband processing circuit 110 may calculate hardware parameters based on a neural network algorithm, etc. The phase shift values ​​of the multiple phase shifters 310 may be encoded, and different encoding values ​​represent different phase shift value schemes. When calculating the hardware parameters, the encoding information corresponding to the current phase shift value, the current frequency band or frequency value, and the current channel detection signal (such as the real part of the impedance, the imaginary part of the impedance, and the reflection coefficient) may be input into the neural network algorithm for calculation to obtain the target hardware parameters.

[0050] Exemplarily, the detection channel 400 may acquire a relevant channel detection signal from between the RF channel 200 and the phase shifter 310 based on a power divider.

[0051] Exemplarily, the phased array antenna system 1000 further includes a single-pole multi-throw switch. The detection channel 400 is respectively connected to the plurality of phase shifters 310 through the single-pole multi-throw switch. In an embodiment of the present invention, the detection channel 400 can select channel status signals for different channels through the single-pole multi-throw switch.

[0052] Embodiment 2:

[0053] Based on the above embodiment 1, Figure 5 As shown, the RF transmission channel 210 includes a multi-frequency shared power amplifier 211; the input end of the multi-frequency shared power amplifier 211 is connected to the digital processing circuit 100, and the output end of the multi-frequency shared power amplifier 211 is connected to multiple antenna radiators 320 through multiple phase shifters 310. The multi-frequency shared power amplifier 211 is used to power amplify RF signals of multiple different frequency bands. In an embodiment of the present invention, the power amplification of RF signals of multiple frequency bands is achieved by multiplexing the multi-frequency shared power amplifier 211.

[0054] With the development of wireless communication technology, the amount of data information that needs to be carried on RF signals has also increased rapidly. Along with this is the increase in the bandwidth demand for RF signals. In order to ensure the efficiency of high peak-to-average ratio RF signals after power amplification, it is necessary to increase the power back-off as much as possible. The power amplifier is the device that consumes the most power in the transmitting device. When the power is backed off in large quantities, how to ensure that the power amplifier maintains a high efficiency is a major problem. At the same time, in the design of power amplifiers, improving back-off efficiency and expanding the working bandwidth are conflicting requirements, and both have certain design difficulties. The design of high-power, wide-bandwidth, large back-off and high-efficiency power amplifiers has always been a difficult problem in the industry. To this end, the industry has proposed a Doherty power amplifier architecture based on load traction. Such as Figure 6As shown, a typical Doherty power amplification architecture includes a main amplification (also known as carrier amplification) circuit, an auxiliary amplification (also known as peak amplification) circuit, an impedance inversion line, an impedance variation line, and a phase compensation line. The input end of the peak amplification circuit is coupled to the phase compensation line. The output end of the carrier amplification circuit is coupled to the first end of the impedance inversion line. The second end of the impedance inversion line is coupled to the output end of the peak amplification circuit and then coupled to the first end of the impedance variation line. The second end of the impedance variation line serves as the output end of the Doherty power amplification architecture. In the Doherty power amplification architecture, when the power of the input RF signal is low, only the carrier amplification circuit is turned on to amplify the power of the input RF signal and output it. At this time, the impedance inversion line only serves as an impedance-matched transmission line so that the transmission impedance of the output RF signal is equal to the system impedance (for example, 50Ω). And the carrier amplification circuit operates at its efficiency saturation point, which can reduce power consumption waste. When the power of the input RF signal is large, the carrier amplifier circuit and the peak amplifier circuit work at the same time, and the current and voltage of the branch where the two power amplifier circuits are located are pulled by the load of the impedance transformation line to achieve impedance inversion, thereby achieving power synthesis of the RF signals output by the two power amplifier circuits to ensure that the transmission impedance is equal to the system impedance. In this way, a large bandwidth and conversion efficiency can be achieved in both high-power and low-power conditions. The specific principles of the Doherty power amplifier architecture belong to the prior art, and can be referred to in relevant literature records, and the embodiments of the present invention will not be repeated. The traditional Doherty power amplifier architecture realizes single-frequency power synthesis. On this basis, it can be improved to obtain a multi-frequency shared power amplifier 211.

[0055] like Figure 7As shown, the frequency sharing power amplifier 211 includes a first main amplifier branch main1, a second main amplifier branch main2, a first shared slave amplifier branch auxi1, a second shared slave amplifier branch auxi2, a first coupler coup1 and a second coupler coup2. The first end of the first coupler coup1 is used to input a radio frequency signal of a first frequency band, the second end of the first coupler coup1 is used to input a radio frequency signal of a second frequency band, the third end of the first coupler coup1 is connected to the input end of the first shared slave amplifier branch auxi1, and the fourth end of the first coupler coup1 is connected to the input end of the second shared slave amplifier branch auxi2. The output end of the first shared slave amplifier branch auxi1 is connected to the second end of the second coupler coup2, and the output end of the second shared slave amplifier branch auxi2 is connected to the second end of the second coupler coup2. The input end of the first main amplifier branch main1 is used to input the RF signal of the first frequency band, and the output end of the first main amplifier branch main1 is coupled with the third end of the second coupler coup2 to serve as the output end of the multi-frequency shared power amplifier 211 regarding the RF signal of the first frequency band. The input end of the second main amplifier branch main2 is used to input the RF signal of the second frequency band, and the output end of the second main amplifier branch main2 is coupled with the fourth end of the second coupler coup2 to serve as the output end of the multi-frequency shared power amplifier 211 regarding the RF signal of the second frequency band.

[0056] Exemplarily, for the first coupler coup1 or the second coupler coup2, the first end and the second end of the coupler are isolated ends, the third end and the fourth end are isolated ends, the second end and the third end are straight-through ends, and the first end and the fourth end are straight-through ends.

[0057] In the present invention, Figure 7In the illustrated embodiment, the first main amplifier branch main1 is the main amplifier circuit of the radio frequency signal of the first frequency band under the Doherty power amplifier architecture. The second main amplifier branch main2 is the main amplifier circuit of the radio frequency signal of the second frequency band under the Doherty power amplifier architecture. The first shared slave amplifier branch auxi1 and the second shared slave amplifier branch auxi2 are slave amplifier circuits shared by the radio frequency signals of the first frequency band and the second frequency band under the Doherty power amplifier architecture. Any of the four ports of the coupler can be used as an input port for the radio frequency signal. When one port of the coupler is the input end, the other three ports are its isolation end, coupling end and through end respectively. The isolation end will not output the radio frequency signal input at the input end. The coupling end and the through end can output the radio frequency signal input from the input end, and the radio frequency signal output by the through end can have the same phase as the radio frequency signal input by the input end, and the radio frequency signal output by the coupling end can have a certain phase difference (for example, a 90° phase difference) with the radio frequency signal input by the input end. Therefore, based on two couplers, a power amplifier architecture shared by the first frequency band and the second frequency band can be formed. According to the difference in input power of the RF signals in the first frequency band and the second frequency band, in the Doherty power amplifier architecture, when the master path and the slave path need to perform load pulling to achieve power synthesis, the first frequency band and / or the second frequency band may perform power synthesis.

[0058] Take the first frequency band for power synthesis as an example. Figure 7As shown, the RF signal of the first frequency band is transmitted to the first end of the first coupler coup1 and the input end of the first main amplifier branch main1 respectively. Among them, the RF signal of the first frequency band input to the first end of the first coupler coup1 will not be transmitted to its second end, but will only be output from its third end and fourth end. In addition, the fourth end is the through end of the first end, so the RF signal of the first frequency band output at the fourth end will not be phase-shifted, and the third end is the coupling end of the first end, and the RF signal of the first frequency band output at the third end will be phase-shifted by 90°. After the two RF signals of the first frequency band are power-amplified by the first shared slave amplifier branch auxi1 and the second shared slave amplifier branch auxi2 respectively, they are correspondingly transmitted to the first end and the second end of the second coupler coup2. At this time, the RF signal of the first frequency band inputted into the first end of the second coupler coup2 is an RF signal without phase shifting, and it will output the RF signal of the first frequency band after phase shifting by 90° (compared with the phase value at the first end of the first coupler coup1) from the third end of the second coupler coup2 (which is a coupling end with the first end of the second coupler coup2), and output the RF signal of the first frequency band without phase shifting from the fourth end of the second coupler coup2 (which is a through end with the first end of the second coupler coup2). Similarly, the RF signal of the first frequency band inputted into the second end of the second coupler coup2 is a RF signal with a phase shift of 90°, which will output the RF signal of the first frequency band after the phase shift of 90° (compared to the phase value at the first end of the first coupler coup1) from the third end of the second coupler coup2 (which is a through end with the second end of the second coupler coup2), and output the RF signal of the first frequency band after the phase shift of 180° (compared to the phase value at the first end of the first coupler coup1) from the fourth end of the second coupler coup2 (which is a coupling end with the second end of the second coupler coup2). In summary, the third end of the second coupler coup1 will output two combined RF signals of the first frequency band with a phase shift of 90°, and the two RF signals of the first frequency band with a phase shift of 90° will be strengthened and then power synthesized with the first main amplifier branch main1. The fourth end of the second coupler coup2 has RF signals of the first frequency band with a phase shift of 0° and a phase shift of 180°, and the two signals cancel each other out, so that the fourth end of the second coupler coup2 does not output RF signals of the first frequency band.

[0059] Similarly, when the second end of the first coupler coup1 inputs the RF signal of the second frequency band, the fourth end of the second coupler coup2 will output the RF signal of the second frequency band after power amplification and perform load pulling and power synthesis with the RF signal of the second frequency band output by the second main amplifier branch main2. The third end of the second coupler coup2 will not output the RF signal of the second frequency band. Therefore, based on Figure 7The architecture shown can implement a dual-frequency power sharing architecture to amplify the radio frequency signals of the first frequency band and the second frequency band respectively based on the Doherty power amplification architecture.

[0060] For example, Figure 7 As shown, the first main amplifier branch main1 includes a first main amplifier MPA1 and a first impedance inversion line ZL1. The second main amplifier branch main2 includes a second main amplifier MPA2 and a second impedance inversion line ZL2. The input end of the first main amplifier MPA1 is used to input a radio frequency signal of the first frequency band, and the output end of the first main amplifier MPA1 is coupled to the third end of the second coupler coup2 through the first impedance inversion line ZL1. The input end of the second main amplifier MPA2 is used to input a radio frequency signal of the second frequency band, and the output end of the second main amplifier MPA2 is coupled to the fourth end of the second coupler coup2 through the second impedance inversion line ZL2. In an embodiment of the present invention, the first impedance inversion line ZL1 is used to achieve impedance inversion and load pulling of radio frequency signals of the first frequency band. The second impedance inversion line ZL2 is used to achieve impedance inversion and load pulling of radio frequency signals of the second frequency band.

[0061] In some possible implementations, the baseband processing circuit 110 of the digital processing circuit 100 is also used to: output a gate control signal to the multi-frequency shared power amplifier 211 according to the data volume of the data information carried on the radio frequency signal in a unit time, and the gate control signal is used to adjust the gate bias voltage of the power tube M of the first main amplifier MPA1 and / or the second main amplifier MPA2 in the multi-frequency shared power amplifier 211. In an embodiment of the present invention, as the wireless radio frequency evolves towards 5.5G communication or 6G communication, the power consumption of the power amplifier device is getting larger and larger. In the wireless communication system, the power consumption of the power amplifier device accounts for the largest proportion. With the development of wireless communication, the requirements for bandwidth, frequency and data volume are also increasing. How to reduce power consumption has become a major issue in the design of wireless communication systems. In the provisions of the wireless communication standard, data is compiled according to the signal symbol level and carried on the wireless carrier signal. The amount of data on each signal symbol is known to the baseband processing circuit 110. There is a positive correlation between the amount of data of the signal symbol and the signal power of the radio frequency signal. In current wireless communications, no matter how much data is, in order to ensure the normal operation of communication, the power amplifier device is operated at full load as much as possible, which will cause a great waste of power consumption. Because at the power device level, it is very difficult to finely control and adjust the signal power of the RF signal. In the embodiment of the present invention, because the baseband processing circuit 110 knows the size of the data amount of each signal symbol when performing data compilation and modulation, the baseband processing circuit 110 can be improved at the software level, so that the baseband processing circuit 110 outputs a gate control signal according to the real-time data amount of the signal symbol to adjust the gate bias voltage of the power tube, so as to reduce the gate bias voltage to reduce power consumption while satisfying the normal operation of wireless communication.

[0062] Exemplarily, for a power tube M, the gate control signal is specifically used to: when the RF signal does not carry valid data information, control the corresponding gate bias voltage to be zero; when the valid data information carried on the RF signal is lower than the first data threshold, control the corresponding gate bias voltage to be in a first voltage state; when the valid data information carried on the RF signal is greater than the first data threshold and less than the second data threshold, control the corresponding gate bias voltage to be in a second voltage state; the gate bias voltage of each power tube M in the first voltage state is less than the gate bias voltage in the second voltage state; between different power tubes M, the gate bias voltages in the same voltage state are the same or different.

[0063] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0064] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0065] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0066] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0067] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0068] In addition, each functional module in each embodiment of the present invention may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0069] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more servers that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0070] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A phased array antenna system with adaptive frequency selection, characterized in that: The invention comprises a digital processing circuit, a radio frequency channel, a detection channel and an antenna array; the antenna array comprises a plurality of phase shifters and a plurality of antenna radiators; the digital processing circuit is connected to the radio frequency channel, and the radio frequency channel is respectively connected to the plurality of antenna radiators through the plurality of phase shifters; the input end of the detection channel is respectively connected to the plurality of phase shifters, and the output end of the detection channel is connected to the digital processing circuit; wherein the digital processing circuit is used for: When the phased array antenna system operates in a first frequency band, a first control signal is output to the antenna array, the first control signal corresponds to the first frequency band, and the first control signal is used to control the antenna array to transmit or receive a radio frequency signal located in the first frequency band based on a first hardware parameter; a plurality of first channel detection signals corresponding to the transmission paths of the plurality of phase shifters are sequentially acquired from the detection channel; a first adjustment signal is output to the antenna array according to the plurality of first channel detection signals, and the first adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the first frequency band; the hardware parameters include at least one of a phase shift value and an amplitude of the antenna array.

2. The phased array antenna system with adaptive frequency selection according to claim 1, characterized in that: The digital processing circuit is also used for: When the phased array antenna system switches from operating in the first frequency band to operating in the second frequency band, a second control signal is output to the antenna array, the second control signal corresponds to the second frequency band, and the second control signal is used to control the antenna array to transmit or receive a radio frequency signal located in the second frequency band based on second hardware parameters; a plurality of second channel detection signals corresponding to the transmission paths of the plurality of phase shifters are sequentially acquired from the detection channel; and a second adjustment signal is output to the antenna array according to the plurality of second channel detection signals, and the second adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the second frequency band.

3. The phased array antenna system with adaptive frequency selection according to claim 1 or 2, characterized in that: The digital processing circuit is also used for: When the phased array antenna system operates in the first frequency band and the second frequency band, a third control signal is output to the antenna array, and the third control signal is used to control the antenna array to transmit or receive radio frequency signals located in the first frequency band and / or the second frequency band based on third pin parameters, and a plurality of first channel detection signals corresponding to the transmission paths of the plurality of phase shifters are sequentially obtained from the detection channel; a third adjustment signal is output to the antenna array according to the plurality of first channel detection signals, and the third adjustment signal is used to adjust the hardware parameters of the antenna array when the phased array antenna operates in the first frequency band and the second frequency band.

4. The phased array antenna system with adaptive frequency selection according to any one of claims 1 to 3, characterized in that: The RF channel includes an RF transmission channel, and the RF transmission channel includes a multi-frequency shared power amplifier; the input end of the multi-frequency shared power amplifier is connected to the digital processing circuit, and the output end of the multi-frequency shared power amplifier is connected to the multiple antenna radiators through the multiple phase shifters respectively; the multi-frequency shared power amplifier is used to amplify the power of RF signals in multiple different frequency bands.

5. The phased array antenna system with adaptive frequency selection according to claim 4, characterized in that: The multi-frequency shared power amplification branch includes a first main amplification branch, a second main amplification branch, a first shared slave amplification branch, a second shared slave amplification branch, a first coupler and a second coupler; wherein, The first end of the first coupler is used to input a radio frequency signal of a first frequency band, the second end of the first coupler is used to input a radio frequency signal of a second frequency band, the third end of the first coupler is connected to the input end of the first shared slave amplification branch, and the fourth end of the first coupler is connected to the input end of the second shared slave amplification branch; the output end of the first shared slave amplification branch is connected to the second end of the second coupler, and the output end of the second shared slave amplification branch is connected to the second end of the second coupler; The input end of the first main amplifier branch is used to input the radio frequency signal of the first frequency band, and the output end of the first main amplifier branch is coupled with the third end of the second coupler to serve as the output end of the multi-frequency shared power amplifier branch for the radio frequency signal of the first frequency band; The input end of the second main amplifier branch is used to input the radio frequency signal of the second frequency band, and the output end of the second main amplifier branch is coupled with the fourth end of the second coupler to serve as the output end of the multi-frequency shared power amplifier branch regarding the radio frequency signal of the second frequency band.

6. The phased array antenna system with adaptive frequency selection according to claim 5, characterized in that: The first main amplifying branch includes a first main amplifier and a first impedance inversion line; the second main amplifying branch includes a second main amplifier and a second impedance inversion line; the input end of the first main amplifier is used to input the radio frequency signal of the first frequency band, and the output end of the first main amplifier is coupled to the third end of the second coupler B2 through the first impedance inversion line; the input end of the second main amplifier is used to input the radio frequency signal of the second frequency band, and the output end of the second main amplifier is coupled to the fourth end of the second coupler B2 through the second impedance inversion line; For the first coupler or the second coupler, the first end and the second end of the coupler are mutually isolated ends, the third end and the fourth end are mutually isolated ends, the second end and the third end are mutually straight-through ends, and the first end and the fourth end are mutually straight-through ends.

7. The phased array antenna system with adaptive frequency selection according to claim 5, characterized in that: The digital processing circuit is used for: According to the amount of data in unit time of the data information carried by the RF signal, a gate control signal is output to the multi-frequency shared power amplifier branch, and the gate control signal is used to adjust the gate bias voltage of the power tube of the first main amplifier and / or the second main amplifier in the multi-frequency shared power amplifier branch.

8. The phased array antenna system with adaptive frequency selection according to claim 7, characterized in that: For one of the power tubes, the gate control signal is specifically used to: when the radio frequency signal does not carry valid data information, control the corresponding gate bias voltage to be zero; when the valid data information carried by the radio frequency signal is lower than a first data threshold, control the corresponding gate bias voltage to be in a first voltage state; When the valid data information carried on the RF signal is greater than the first data threshold and less than the second data threshold, the corresponding gate bias voltage is controlled to be in a second voltage state; the gate bias voltage of each power tube in the first voltage state is less than the gate bias voltage in the second voltage state; between different power tubes, the gate bias voltages in the same voltage state are the same or different.

9. The phased array antenna system with adaptive frequency selection according to claim 1 or 2, characterized in that: The phased array antenna system also includes a single-pole multi-throw switch; the detection channel is connected to the multiple phase shifters respectively through the single-pole multi-throw switch.

10. The phased array antenna system with adaptive frequency selection according to claim 1, characterized in that: The first channel detection signal includes a channel measurement reference signal and reflection coefficient detection information.

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