An antenna performance calibration system, electronic device and calibration method

Abstract

The application relates to the technical field of antennas, in particular to an antenna performance calibration system, electronic equipment and a calibration method, which comprise a coupling radiator, a phased array antenna array, a first signal processing module and a second signal processing module, a plurality of antenna units are connected with the first signal processing module, the first signal processing module or the second signal processing module is used for controlling at least one of the antenna units as a target calibration unit, the coupling radiator and the phased array antenna array are correspondingly arranged, and the transmission loss between the coupling radiator and the phased array antenna array is greater than 70 dB. According to the application, the coupling radiator with high transmission loss is arranged outside the phased array antenna array, the original structure and performance of the phased array antenna and the equipment are not damaged, the phased array antenna does not need to be removed from the equipment, each antenna unit can be accurately calibrated, and the application can be widely applied to phased array systems of various frequency bands and various systems.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to an antenna performance calibration system, electronic device, and calibration method. Background Technology

[0002] Active phased arrays possess advantages such as high scanning speed, strong anti-interference capability, and high pointing accuracy, and are widely used in radar, electronic warfare, and communications. An active phased array typically consists of multiple antenna elements, a transceiver (T / R) module, and back-end channel signal processing. The amplitude and phase of the excitation of each antenna element in an active phased array determine the radiation characteristics of the array, directly influencing the overall performance. The excitation amplitude and phase of the antenna elements are achieved by controlling the phase shifters and attenuators in the T / R module. Phased array systems are calibrated at the factory to ensure overall performance. However, during use, changes in environmental conditions, temperature variations, and component aging can cause the amplitude and phase of the excitation to the antenna elements to deviate from the expected values. This leads to changes in the beam direction and gain of the antenna array, resulting in reduced communication quality and decreased radar detection range and pointing accuracy. Therefore, regular monitoring and calibration of the phased array system are necessary to measure and appropriately compensate for any deviations, maintaining the system's performance.

[0003] In the process of developing this invention, the applicant discovered that existing phased array antenna system calibration methods are cumbersome, and that accurate calibration on the equipment is costly for phased array antenna systems already applied to equipment. Summary of the Invention

[0004] The purpose of this application is to provide an antenna performance calibration system, electronic device, and calibration method to solve the aforementioned technical problems in the prior art, mainly including the following three aspects:

[0005] This application provides an antenna performance calibration system, including a coupled radiator, a phased array antenna array, a first signal processing module, and a second signal processing module. The phased array antenna array includes multiple antenna elements, each connected to the first signal processing module. The first or second signal processing module controls at least one of the antenna elements as a target calibration unit. The coupled radiator and the phased array antenna array are correspondingly arranged, with a transmission loss greater than 70 dB between them. The coupled radiator is connected to the second signal processing module. The phased array antenna array serves as a transmitter and / or receiver.

[0006] When the phased array antenna array is used as the transmitting end, the first signal processing module is used to transmit the first radio frequency signal to the target calibration unit. The target calibration unit is used to convert the first radio frequency signal into a first electromagnetic wave radiation signal and transmit it to the coupling radiator. The coupling radiator is used to convert the first electromagnetic wave radiation signal into a second radio frequency signal. The second signal processing module is used to receive the second radio frequency signal. The first signal processing module or the second signal processing module calibrates the target calibration unit based on the difference between the second radio frequency signal and the first radio frequency signal.

[0007] When the phased array antenna array is used as the receiving end, the second signal processing module is used to transmit the third radio frequency signal to the coupled radiator. The coupled radiator is used to convert the third radio frequency signal into a second electromagnetic wave radiation signal and transmit it to the target calibration unit. The target calibration unit is used to convert the second electromagnetic wave radiation signal into a fourth radio frequency signal. The first signal processing module is used to receive the fourth radio frequency signal. The first signal processing module or the second signal processing module calibrates the target calibration unit based on the difference between the fourth radio frequency signal and the third radio frequency signal.

[0008] Furthermore, the phased array antenna array is connected to the first signal processing module through an integrated radio frequency module. When the phased array antenna array acts as a transmitter, the integrated radio frequency module is used to amplify, phase-shift, and attenuate the first radio frequency signal. When the phased array antenna array acts as a receiver, the integrated radio frequency module is used to amplify, phase-shift, and attenuate the fourth radio frequency signal with low noise.

[0009] Furthermore, the integrated radio frequency module includes a channel switching unit, which is configured in a one-to-one correspondence with the antenna unit. The channel switching unit includes a transceiver switch, a transmit channel, and a receive channel. The transceiver switch is used to control at most one of the transmit channel and the receive channel to be connected to the antenna unit and the first signal processing module for radio frequency signal transmission.

[0010] Furthermore, the first signal processing module also includes a digital-to-analog converter module and a frequency conversion channel. The digital-to-analog converter module, the frequency conversion channel, and the phased array antenna array are connected in sequence. When the phased array antenna array is used as a transmitter, the digital-to-analog converter module is used to convert the digital signal into an intermediate frequency signal, and the frequency conversion channel is used to upconvert the intermediate frequency signal into a first radio frequency signal, which is the operating frequency of the antenna element. When the phased array antenna array is used as a receiver, the frequency conversion channel is used to downconvert the fourth radio frequency signal into an intermediate frequency signal, and the digital-to-analog converter module is used to convert the intermediate frequency signal into a digital signal.

[0011] Furthermore, the antenna performance calibration system includes a cavity, in which the coupled radiator, phased array antenna array, first signal processing module, and second signal processing module are disposed.

[0012] Furthermore, the antenna performance calibration system includes a carrier or a radome, the phased array antenna array, the first signal processing module, and the second signal processing module are disposed on the carrier, and the coupling radiator is disposed on the radome, which is used to protect the phased array antenna array; and / or,

[0013] The first or third radio frequency signal is a point frequency signal.

[0014] Furthermore, the cover is a cover with wave transparency characteristics.

[0015] Furthermore, the coupled radiator is a ring, with its axis passing through the center of the phased array antenna array, and the coupled radiator located at the edge of the cover.

[0016] A second aspect of this application provides an electronic device including the antenna performance calibration system described above.

[0017] A third aspect of this application provides an antenna performance calibration method, characterized in that calibration is performed based on the aforementioned antenna performance calibration system or the aforementioned electronic device, and at least one of the antenna elements from the phased array antenna array is selected as the target calibration unit for calibration, comprising the following steps:

[0018] When the phased array antenna array is used as the transmitting end, the first signal processing module is controlled to transmit the first radio frequency signal to the target calibration unit. The target calibration unit converts the first radio frequency signal into a first electromagnetic wave radiation signal, receives the first electromagnetic wave radiation signal through a coupling radiator and converts it into a second radio frequency signal. The second signal processing module is used to receive the second radio frequency signal and calibrate the target calibration unit based on the difference between the second radio frequency signal and the first radio frequency signal, as well as the preset difference corresponding to the target calibration unit.

[0019] When the phased array antenna array is used as the receiving end, the control second signal processing module transmits the third radio frequency signal to the coupling radiator. The coupling radiator converts the third radio frequency signal into a second electromagnetic wave radiation signal. The target calibration unit receives the second electromagnetic wave radiation signal and converts it into a fourth radio frequency signal. Based on the difference between the fourth radio frequency signal and the first radio frequency signal, as well as the preset difference corresponding to the target calibration unit, the target calibration unit is calibrated.

[0020] Compared with the prior art, the present invention has at least the following technical effects:

[0021] This invention, by setting a high-transmission-loss coupled radiator outside the phased array antenna array, can accurately calibrate each antenna element without damaging the original structure and performance of the phased array antenna and equipment, or removing the phased array antenna from the equipment. It can be widely used in phased array systems of various frequency bands and systems. In particular, for antenna equipment without calibration function, it can achieve self-calibration and repair of the phased array system with small modifications and low cost without affecting the radiation performance of the whole system or increasing the complexity of the whole system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the antenna performance calibration system of the present invention;

[0024] Figure 2 This is a top view of the cover body of the present invention;

[0025] Figure 3 This is a schematic diagram of the phased array antenna array of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the first signal processing module and the second signal processing module of the present invention;

[0027] Figure 5 This is a schematic diagram of the integrated radio frequency module of the present invention;

[0028] Figure 6 This is a schematic diagram of signal transmission during transmitter calibration using the antenna performance calibration system of this invention;

[0029] Figure 7 This is a calibration flowchart of the antenna performance calibration system of the present invention when calibrating the transmitter.

[0030] Figure 8 This is a schematic diagram of signal transmission during receiver calibration using the antenna performance calibration system of this invention;

[0031] Figure 9 This is a calibration flowchart of the antenna performance calibration system of the present invention when calibrating the receiver.

[0032] In the picture,

[0033] 10. Carrier; 110. Phased array antenna array; 111. Antenna element; 121. First signal processing module; 122. Second signal processing module; 123. Digital-to-analog conversion module; 124. Frequency conversion channel; 125. Beamforming network; 130. Integrated radio frequency module; 131. Transceiver switch; 132. Transmit channel; 133. Receive channel; 134. Control unit; 20. Carrier. Detailed Implementation

[0034] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0037] Currently, calibration methods for phased array antenna systems mainly include external calibration and internal calibration. External calibration is generally performed in an anechoic chamber, requiring the already installed phased array antenna system to be removed from the equipment, transported to the anechoic chamber for calibration, and then reinstalled. This is not only time-consuming and labor-intensive, but the subsequent handling and reinstallation may introduce new errors, leading to a degrade in overall system performance. Internal calibration typically involves adding a directional coupler or switch to the output of the T / R module to return the signal to the back end for calibration. This method increases the complexity of the TR module design, introduces link losses leading to a decrease in EIRP, a deterioration in the G / T value, and an increase in system power consumption. Furthermore, this calibration method only calibrates to the connection point between the TR module and the antenna, and cannot monitor changes in the performance of the antenna elements. Additionally, for phased array antenna systems already applied to equipment, especially in situations where high-frequency antenna elements are compact and available space is limited, internal calibration carries the risk of degrading antenna performance, increasing the cost of accurate calibration. To address the high cost of accurate calibration of phased array antenna systems, this application provides an antenna performance calibration system, electronic device, and calibration method that can perform self-calibration of the phased array antenna system without affecting its radiation performance or increasing the overall complexity, and reduce calibration costs. The specific structure is shown in the following embodiments.

[0038] Example 1

[0039] This application provides an antenna performance calibration system, such as... Figures 1-5 As shown, the system includes a coupling radiator 210, a phased array antenna array 110, a first signal processing module 121, and a second signal processing module 122. The phased array antenna array 110 includes multiple antenna elements 111, each connected to the first signal processing module 121. The first signal processing module 121 or the second signal processing module 122 controls at least one of the antenna elements 111 as a target calibration unit. In this embodiment, the first signal processing module 121 is preferably used to control at least one of the antenna elements 111 as a target calibration unit. The coupling radiator 210 and the phased array antenna array 110 are correspondingly arranged. To avoid reception damage due to insufficient attenuation from the transmitted power to the received power, the transmission loss between the coupling radiator 210 and the phased array antenna array 110 is set to be greater than 70 dB. This ensures that the arrangement of the coupling radiator 210 does not affect the performance of the phased array antenna array 110. The coupling radiator 210 is connected to the second signal processing module 122. The phased array antenna array 110 serves as a transmitter and / or receiver.

[0040] When the phased array antenna array 110 is used as the transmitting end, the first signal processing module 121 is used to transmit a first radio frequency (RF) signal to the target calibration unit. The target calibration unit is used to convert the first RF signal into a first electromagnetic wave radiation signal and transmit it to the coupling radiator 210. The coupling radiator 210 is used to convert the first electromagnetic wave radiation signal into a second RF signal. The second signal processing module 122 is used to receive the second RF signal. The first signal processing module 121 and the second signal processing module 122 are connected to transmit the first RF signal and / or the second RF signal. The first signal processing module 121 or the second signal processing module 122 calibrates the target calibration unit based on the difference between the second RF signal and the first RF signal. In this embodiment, it is preferable that the first signal processing module 121 calibrates the target calibration unit based on the difference between the second RF signal and the first RF signal. For example, Figure 6 and Figure 7 As shown, when transmitter calibration is required, one antenna element 111 in the phased array antenna array 110 is selected as the target calibration unit. The target calibration unit is in normal transmission state, and other channels are set to maximum attenuation or off state. The first signal processing module 121 generates a digital signal and transmits it to the digital-to-analog converter module 123. After the digital signal is converted to an analog signal by the digital-to-analog converter module 123, the generated intermediate frequency signal is up-converted by the frequency conversion channel 124 into a point frequency signal (first radio frequency signal) within the working frequency band of the target calibration unit in the phased array antenna array 110. After passing through the beamforming network 125, it is transmitted to the integrated radio frequency module 130 for power amplification and transmission to the target calibration unit. The first radio frequency signal received by the unit is converted into a first electromagnetic wave radiation signal and radiated out. After receiving the first electromagnetic wave radiation signal radiated by the target calibration unit, the coupled radiator 210 converts it into a second radio frequency signal and transmits it to the second signal processing module 122. Based on the difference between the second radio frequency signal and the first radio frequency signal, it is compared with the preset difference corresponding to the target calibration unit to complete the calibration of one frequency point of the transmission channel corresponding to the target calibration unit. The first signal processing module 121 is controlled to change the frequency of the digital signal to complete the calibration of the new frequency point. This operation is repeated until all frequency points within the working frequency band are calibrated. If only one antenna unit 111 is selected as the target calibration unit, the calibration of one channel is completed. Then, after switching to the second, third, up to the Nth channel, the calibration of the entire phased array system can be completed. Preferably, the difference between the second radio frequency signal and the first radio frequency signal can also be compared with the preset difference corresponding to the preset target calibration unit through the first signal processing module 121. The preset difference can be the factory data of the target calibration unit. If the difference matches, no correction is needed. If the difference does not match, the deviation can be controlled and corrected. It should be noted that the difference includes at least amplitude and phase indicators.

[0041] When the phased array antenna array 110 acts as a receiver, the second signal processing module 122 transmits a third radio frequency signal to the coupling radiator 210. The coupling radiator 210 converts the third radio frequency signal into a second electromagnetic wave radiation signal and transmits it to the target calibration unit. The target calibration unit converts the second electromagnetic wave radiation signal into a fourth radio frequency signal. The first signal processing module 121 receives the fourth radio frequency signal. The first signal processing module 121 and the second signal processing module 122 are connected to transmit the third radio frequency signal and / or the fourth radio frequency signal. The first signal processing module 121 or the second signal processing module 122 calibrates the target calibration unit based on the fourth radio frequency signal and preset working data of the target calibration unit. For example, when receiver calibration is required, such as... Figure 8 and Figure 9 As shown, one antenna element 111 in the phased array antenna array 110 is selected as the target calibration unit. The target calibration unit is set to the maximum gain state, and other channels are set to the maximum attenuation or off state. The second signal processing module 122 generates and transmits a point frequency signal (third radio frequency signal) within the working frequency band of the target calibration unit in the phased array antenna array 110. It is transmitted to the coupling radiator 210 via the radio frequency interconnect. The coupling radiator 210 converts the third radio frequency signal into a second electromagnetic wave radiation signal and radiates it to the target calibration unit. The target calibration unit converts the received second electromagnetic wave radiation signal into a fourth radio frequency signal and sends it to the integrated radio frequency module 130. After gain amplification, it is transmitted to the frequency conversion channel 124 via the beamforming network 125 to complete the down-conversion. The down-converted intermediate frequency signal is converted from analog to digital by the digital-to-analog conversion module 123 and the acquired signal is transmitted to the first signal processing module 121. Based on the difference between the third radio frequency signal and the fourth radio frequency signal, it is compared with the preset difference corresponding to the target calibration unit to complete the calibration of one frequency point of the transmission channel corresponding to the target calibration unit. Then, the second signal processing module 122 can be controlled to generate a new frequency point within the operating frequency band and repeat the above operation to complete the calibration of the second frequency point. This process is repeated until all frequency points within the frequency band are calibrated. If only one antenna element 111 is selected as the target calibration unit, the calibration of one channel is completed. Then, switching to the second, third, and Nth channels can complete the calibration of the entire phased array system. Preferably, the first signal processing module 121 can also compare the difference between the third and fourth radio frequency signals with the preset difference corresponding to the preset target calibration unit. The preset difference can be the factory data of the target calibration unit. If the difference matches, no correction is needed; if the difference does not match, the deviation can be corrected. In some embodiments, for a digital phased array, setting all channels to maximum gain allows for the simultaneous acquisition and correction of all channels.

[0042] By setting a high-transmission-loss coupling radiator 210 outside the phased array antenna array 110, the original structure and performance of the phased array antenna and equipment are not damaged, and the phased array antenna does not need to be removed from the equipment. This allows for accurate calibration of each antenna element 111. It can be widely used in phased array systems of various frequency bands and systems. In particular, for antenna equipment without calibration function, it can achieve self-calibration and repair of the phased array system with small modifications and low cost without affecting the radiation performance of the whole machine or increasing the complexity of the whole machine.

[0043] Specifically, to correct the phased array antenna, the phased array antenna array 110 can be connected to the first signal processing module 121 via the integrated RF module 130. When the phased array antenna array 110 acts as a transmitter, the integrated RF module 130 is used to amplify, phase-shift, and attenuate the first RF signal. When the phased array antenna array 110 acts as a receiver, the integrated RF module 130 is used to amplify, phase-shift, and attenuate the fourth RF signal with low noise. When the calibration result shows a mismatch, the first signal processing module 121 can send a correction command to the integrated RF module 130. Based on the difference comparison result, the deviated indicators are corrected to restore the difference to a match.

[0044] In some embodiments, the integrated RF module 130 further includes an RF enclosure for protecting and housing the TR components.

[0045] In some embodiments, the integrated radio frequency module 130 further includes a control unit 134, which is used to regulate and / or acquire the temperature of each device in the integrated radio frequency module 130, so as to correct the deviation of the index based on the difference comparison result and restore the difference to a matching value.

[0046] To enable the phased array antenna array 110 to function as both a receiver and a transmitter, such as... Figure 1 , Figure 5 , Figure 6 and Figure 8 As shown, the integrated radio frequency module 130 can be configured to include a channel switching unit, which is configured in a one-to-one correspondence with the antenna unit 111. The channel switching unit includes a transceiver switch 131, a transmit channel 132, and a receive channel 133. The transceiver switch 131 is used to control the signal transmission connection between at most one of the transmit channel 132 and the receive channel 133 and the antenna unit 111 and the first signal processing module 121. When the phased array antenna array 110 is required as a receiver, such as... Figure 8 As shown, the control receiving channel 133 is connected to the antenna unit 111 and the first signal processing module 121 for radio frequency signal transmission. When a phased array antenna array is required as a transmitter, such as... Figure 6As shown, the control transmission channel 132 is connected to the antenna unit 111 and the first signal processing module 121 for radio frequency signal transmission. Alternatively, the transceiver switch 131 can be turned off to keep the corresponding antenna unit 111 in the off state, thereby realizing flexible adjustment of the phased array antenna array 110. The structure is simple and conducive to the miniaturization design of the phased array antenna.

[0047] Specifically, the first signal processing module 121 further includes a digital-to-analog converter module 123 and a frequency conversion channel 124. The digital-to-analog converter module 123, the frequency conversion channel 124, and the phased array antenna array 110 are connected in sequence. When the phased array antenna array 110 is used as a transmitter, the digital-to-analog converter module 123 is used to convert the digital signal into an intermediate frequency signal, and the frequency conversion channel 124 is used to upconvert the intermediate frequency signal into a first radio frequency signal, which is the operating frequency of the antenna element 111. When the phased array antenna array 110 is used as a receiver, the frequency conversion channel 124 is used to downconvert the fourth radio frequency signal into an intermediate frequency signal, and the digital-to-analog converter module 123 is used to convert the intermediate frequency signal into a digital signal.

[0048] In some embodiments, the antenna performance calibration system may include a cavity, in which the coupled radiator 210, the phased array antenna array 110, the first signal processing module 121 and the second signal processing module 122 are disposed, thereby improving the space utilization of the phased array antenna and utilizing the miniaturized design of the phased array antenna.

[0049] To achieve integrated design of the antenna performance calibration system within the device, the antenna performance calibration system can be configured to include a carrier 10 or a housing 20. The phased array antenna array 110, the first signal processing module 121, and the second signal processing module 122 are disposed on the carrier 10, and the coupling radiator 210 is disposed on the housing 20, which protects the phased array antenna array 110. Specifically, the coupling radiator 210 is disposed on the outer or inner surface of the housing 20, or it can be partially or completely embedded in the housing 20. In this embodiment, the coupling radiator 210 is preferably disposed on the inner surface of the housing 20.

[0050] To avoid the shroud 20 affecting the radiation characteristics of the antenna, the shroud 20 can be configured as a shroud with wave transmission characteristics.

[0051] To ensure the calibration effect of each antenna element 111 in the phased array antenna array 110, the coupling radiator 210 can be set as a ring, with its axis passing through the center of the phased array antenna array 110. The coupling radiator 210 is located at the edge of the cover 20, which corresponds to the signal transmission port of the phased array antenna array 110. Accordingly, the coupling radiator 210 is located at the edge of the signal transmission area of ​​the phased array antenna array. With the transmission loss between the coupling radiator 210 and the phased array antenna array 110 greater than 70dB, it can not only ensure stable signal transmission between the coupling radiator 210 and each antenna element 111, but also weaken the impact of the coupling radiator 210 on the working performance of the phased array antenna array 110, and reduce the risk of performance degradation of each antenna element 111 due to the coupling radiator 210.

[0052] In some embodiments, the antenna performance calibration system may further include a beamforming network 125. The beamforming network 125 is used to perform transmit and receive beamforming for the analog phased array. The beamforming network 125 can be composed of switches, power dividers, and inverter bridges; this is prior art and will not be described in detail here. The digital-to-analog conversion module can be composed of an AD / DA converter. The frequency conversion channel can be composed of up-conversion and down-conversion components.

[0053] Example 2

[0054] This application provides an electronic device, characterized in that it includes the antenna performance calibration system of embodiment 1.

[0055] Example 3

[0056] This application provides an antenna performance calibration method, which performs calibration based on the antenna performance calibration system in Embodiment 1 or the electronic device in Embodiment 2, selecting at least one antenna element 111 from the phased array antenna array 110 as a target calibration unit for calibration, including the following steps:

[0057] When the phased array antenna array 110 is used as the transmitting end, such as Figure 6 and Figure 7 As shown, the first signal processing module 121 transmits a first radio frequency signal to the target calibration unit. The target calibration unit converts the first radio frequency signal into a first electromagnetic wave radiation signal. The first electromagnetic wave radiation signal is received by the coupling radiator 210 and converted into a second radio frequency signal. The second signal processing module 122 receives the second radio frequency signal and performs calibration and correction processing on the target calibration unit based on the difference between the second radio frequency signal and the first radio frequency signal, as well as the preset difference corresponding to the target calibration unit.

[0058] When the phased array antenna array 110 is used as a receiver, such as Figure 8 and Figure 9As shown, the control second signal processing module 122 transmits a third radio frequency signal to the coupling radiator 210. The coupling radiator 210 converts the third radio frequency signal into a second electromagnetic wave radiation signal. The target calibration unit receives the second electromagnetic wave radiation signal and converts it into a fourth radio frequency signal. Based on the difference between the fourth radio frequency signal and the first radio frequency signal, as well as the preset difference corresponding to the target calibration unit, the target calibration unit is calibrated and corrected.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antenna performance calibration system, characterized by, The antenna performance calibration system comprises a coupling radiator, a phased array antenna array, a first signal processing module and a second signal processing module, the phased array antenna array comprises a plurality of antenna units, the plurality of antenna units are respectively connected with the first signal processing module, the first signal processing module or the second signal processing module is used for controlling at least one of the antenna units as a target calibration unit, the coupling radiator and the phased array antenna array are correspondingly arranged, the transmission loss between the coupling radiator and the phased array antenna array is greater than 70 dB, and the coupling radiator is connected with the second signal processing module; The antenna performance calibration system comprises a chamber, the coupling radiator, the phased array antenna array, the first signal processing module and the second signal processing module are arranged in the chamber, the antenna performance calibration system comprises a carrier and a cover, the phased array antenna array, the first signal processing module and the second signal processing module are arranged on the carrier, the coupling radiator is arranged on the cover, and the cover is used for protecting the phased array antenna array; the phased array antenna array is a transmitting end and / or a receiving end, When the phased array antenna array is the transmitting end, the first signal processing module is used for transmitting a first radio frequency signal to the target calibration unit, the target calibration unit is used for converting the first radio frequency signal into a first electromagnetic wave radiation signal and transmitting the first electromagnetic wave radiation signal to the coupling radiator, the coupling radiator is used for converting the first electromagnetic wave radiation signal into a second radio frequency signal, the second signal processing module is used for receiving the second radio frequency signal, and the first signal processing module or the second signal processing module calibrates the target calibration unit based on a difference between the second radio frequency signal and the first radio frequency signal; When the phased array antenna array is the receiving end, the second signal processing module is used for transmitting a third radio frequency signal to the coupling radiator, the coupling radiator is used for converting the third radio frequency signal into a second electromagnetic wave radiation signal and transmitting the second electromagnetic wave radiation signal to the target calibration unit, the target calibration unit is used for converting the second electromagnetic wave radiation signal into a fourth radio frequency signal, the first signal processing module is used for receiving the fourth radio frequency signal, and the first signal processing module or the second signal processing module calibrates the target calibration unit based on a difference between the fourth radio frequency signal and the third radio frequency signal; The difference comprises an amplitude and a phase.

2. The antenna performance calibration system of claim 1, wherein, The phased array antenna array is connected with the first signal processing module through a comprehensive radio frequency module, when the phased array antenna array is the transmitting end, the comprehensive radio frequency module is used for realizing gain amplification, phase shift and attenuation of the first radio frequency signal, and when the phased array antenna array is the receiving end, the comprehensive radio frequency module is used for realizing low-noise amplification, phase shift and attenuation of the fourth radio frequency signal.

3. The antenna performance calibration system of claim 2, wherein, The comprehensive radio frequency module comprises a channel switching unit, the channel switching unit is arranged in one-to-one correspondence with the antenna units, the channel switching unit comprises a transceiver switch, a transmitting channel and a receiving channel, and the transceiver switch is used for controlling at most one of the transmitting channel and the receiving channel to be in signal transmission connection with the antenna units and the first signal processing module.

4. The antenna performance calibration system of claim 1, wherein, The first signal processing module further comprises a digital-to-analog conversion module and a frequency conversion channel, the digital-to-analog conversion module, the frequency conversion channel and the phased array antenna array are sequentially connected, when the phased array antenna array is used as a transmitting end, the digital-to-analog conversion module is used for converting a digital signal into an intermediate frequency signal, the frequency conversion channel is used for up-converting the intermediate frequency signal into a first radio frequency signal, and the first radio frequency signal is the operating frequency of the antenna unit; when the phased array antenna array is used as a receiving end, the frequency conversion channel is used for down-converting a fourth radio frequency signal into an intermediate frequency signal, and the digital-to-analog conversion module is used for converting the intermediate frequency signal into a digital signal.

5. The antenna performance calibration system of any one of claims 1 to 4, wherein, The first radio frequency signal or the third radio frequency signal is a point frequency signal.

6. The antenna performance calibration system of claim 5, wherein, The cover body is a cover body with a wave-transparent property.

7. The antenna performance calibration system of claim 5, wherein, The coupling radiator is a circular ring, an axis of the coupling radiator passes through the center of the phased array antenna array, and the coupling radiator is located at the edge of the cover body.

8. An electronic device, comprising: An antenna performance calibration system according to any one of claims 1-7.

9. An antenna performance calibration method, characterized by, The electronic device according to claim 8 is calibrated based on the antenna performance calibration system according to any one of claims 1-7 or the electronic device according to claim 8, at least one of the antenna units in the phased array antenna array is selected as a target calibration unit for calibration, and the calibration comprises the following steps: When the phased array antenna array is used as a transmitting end, the first signal processing module is controlled to transmit a first radio frequency signal to the target calibration unit, the target calibration unit converts the first radio frequency signal into a first electromagnetic wave radiation signal, the coupling radiator receives the first electromagnetic wave radiation signal and converts it into a second radio frequency signal, the second signal processing module is used for receiving the second radio frequency signal, and the target calibration unit is calibrated based on the difference between the second radio frequency signal and the first radio frequency signal and a preset difference value corresponding to the target calibration unit; When the phased array antenna array is used as a receiving end, the second signal processing module is controlled to transmit a third radio frequency signal to the coupling radiator, the coupling radiator converts the third radio frequency signal into a second electromagnetic wave radiation signal, the target calibration unit receives the second electromagnetic wave radiation signal and converts it into a fourth radio frequency signal, and the target calibration unit is calibrated based on the difference between the fourth radio frequency signal and the first radio frequency signal and the preset difference value corresponding to the target calibration unit.

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