Calibration methods, calibration systems, equipment, and media for phased array antenna channels

Abstract

This invention discloses a calibration method, calibration system, equipment, and medium for phased array antenna channels, comprising: when the distance between the phased array antenna and the horn antenna meets the far-field condition, activating at least one transmit channel of the phased array antenna to transmit a first beam signal to the horn antenna, and deactivating other transmit channels; calculating multiple transmit calibration parameters based on the first beam signal received by the horn antenna; calibrating the corresponding transmit channels based on the multiple transmit calibration parameters; after all transmit channels of the phased array antenna have been calibrated, activating at least one receive channel of the phased array antenna to receive a second beam signal transmitted by the horn antenna, and deactivating other receive channels; calculating multiple receive calibration parameters based on the second beam signal received by the phased array antenna; and calibrating the corresponding receive channels based on the multiple receive calibration parameters. This invention improves the efficiency and accuracy of phased array antenna calibration and reduces calibration costs.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a calibration method, calibration system, equipment and medium for a phased array antenna channel. Background Technology

[0002] In modern phased array antenna systems, precise beam scanning relies on fine-tuning of the phase of each antenna element. However, in practical engineering, factors such as insufficient manufacturing precision, structural asymmetry, inconsistencies in device characteristics, and mutual coupling effects between antenna elements often cause the actual operating parameters of each element to deviate from the design expectations, thus affecting the overall array performance and communication quality. Therefore, to ensure that the performance of the phased array antenna meets design requirements, it is necessary to calibrate the phased array antenna to eliminate these errors as much as possible. However, current mainstream phased array antenna calibration methods generally face problems such as complex operation, strong equipment dependence, and limited applicability. They typically require expensive and complex equipment, such as microwave anechoic chambers and vector network analyzers, and also require engineers with high levels of professional knowledge and practical experience, which can lead to failure to achieve the calibration target and thus affect the performance of the phased array antenna. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a calibration method, calibration system, equipment and medium for phased array antenna channels, which not only improves the efficiency and accuracy of phased array antenna calibration, but also effectively reduces hardware costs and operational difficulty.

[0004] In a first aspect, embodiments of the present invention provide a calibration method for a phased array antenna channel, comprising:

[0005] When the distance between the phased array antenna and the horn antenna meets the far-field condition, at least one of the phased array antenna's transmission channels to be calibrated is turned on to transmit the first beam signal to the horn antenna, while other transmission channels are turned off.

[0006] Based on the first beam signal received by the horn antenna, multiple transmission calibration parameters are calculated;

[0007] The corresponding transmission channels are calibrated according to the plurality of transmission calibration parameters;

[0008] After all the transmitting channels of the phased array antenna have been calibrated, at least one receiving channel of the phased array antenna to be calibrated is turned on to receive the second beam signal transmitted by the horn antenna, and the other receiving channels are turned off.

[0009] Based on the second beam signal received by the phased array antenna, multiple receiving calibration parameters are calculated;

[0010] The corresponding receiving channels are calibrated according to the plurality of receiving calibration parameters.

[0011] The calibration method for a phased array antenna channel provided by an embodiment of the present invention has at least the following beneficial effects: In this embodiment, when the distance between the phased array antenna and the horn antenna meets the far-field condition, at least one transmit channel of the phased array antenna to be calibrated is turned on to transmit a first beam signal to the horn antenna, while other transmit channels are turned off. Then, based on the first beam signal received by the horn antenna, multiple transmit calibration parameters are calculated, and the corresponding transmit channels are calibrated according to these multiple transmit calibration parameters. After all transmit channels of the phased array antenna have been calibrated, at least one receive channel of the phased array antenna to be calibrated is turned on to receive a second beam signal transmitted by the horn antenna, while other receive channels are turned off. Then, based on the second beam signal received by the phased array antenna, multiple receive calibration parameters are calculated, and the corresponding receive channels are calibrated according to these multiple receive calibration parameters. The embodiments of the present invention achieve rapid sequential measurement of each phased array antenna channel through precise channel switching control, and support joint calibration of transmit and receive channels. This achieves black-box calibration without considering the specific location and initial phase of the channel. The calibration measurement equipment only requires a vector analyzer, which not only improves the efficiency and accuracy of phased array antenna calibration but also effectively reduces the cost of the entire calibration process.

[0012] According to some embodiments of the present invention, the calculation of multiple transmission calibration parameters based on the first beam signal received by the horn antenna includes:

[0013] The first beam signal received by the horn antenna is analyzed to obtain the first amplitude value and the first phase value corresponding to the transmission channel to be calibrated. Then, the process returns to the step of turning on at least one transmission channel of the phased array antenna to transmit the first beam signal to the horn antenna and turning off the other transmission channels, until all the transmission channels transmit the first beam signal to the horn antenna.

[0014] The first amplitude mean is calculated based on multiple first amplitude values;

[0015] Based on the first amplitude average and multiple first amplitude values, the first amplitude deviation corresponding to each of the transmission channels is calculated;

[0016] Data correction processing is performed on multiple first amplitude deviations to obtain multiple first target amplitude deviations after data correction processing;

[0017] The average value of the first phase is calculated based on multiple first phase values;

[0018] Based on the first phase average and multiple first phase values, the first phase deviation corresponding to each of the transmission channels is calculated;

[0019] Data correction processing is performed on multiple first phase deviations to obtain multiple first target phase deviations after data correction processing;

[0020] Based on the plurality of first target amplitude deviations and the plurality of first target phase deviations, a plurality of first launch calibration coefficients are calculated.

[0021] According to some embodiments of the present invention, after performing data correction processing on a plurality of first amplitude deviations to obtain a plurality of first target amplitude deviations after data correction processing, the process includes:

[0022] The distance between the phased array antenna and the horn antenna is recorded as the first distance;

[0023] Obtain the second distance between each of the transmission channels and the probe of the phased array antenna;

[0024] Based on the first distance, the second distance, and the plurality of first phase values, a plurality of first corrected phase differences are calculated;

[0025] Based on the plurality of first target amplitude deviations and the plurality of first corrected phase differences, a plurality of second emission calibration coefficients are calculated.

[0026] According to some embodiments of the present invention, calibrating the corresponding transmission channel according to the plurality of transmission calibration parameters includes:

[0027] Obtain the first wave control code for each of the aforementioned transmission channels;

[0028] The first transmission calibration wave control code is calculated based on the first wave control code and the first transmission calibration coefficient of the same transmission channel.

[0029] According to some embodiments of the present invention, calibrating the corresponding transmission channel according to the plurality of transmission calibration parameters includes:

[0030] Obtain the first wave control code for each of the aforementioned transmission channels;

[0031] The second transmission calibration wave control code is calculated based on the first wave control code and the second transmission calibration coefficient of the same transmission channel.

[0032] According to some embodiments of the present invention, the calculation of multiple reception calibration parameters based on the second beam signal received by the phased array antenna includes:

[0033] The second beam signal received by the phased array antenna is analyzed to obtain the second amplitude value and the second phase value corresponding to the receiving channel to be calibrated. Then, the process returns to the step of turning on at least one receiving channel of the phased array antenna to receive the second beam signal emitted by the horn antenna and turning off other receiving channels until all receiving channels receive the second beam signal emitted by the horn antenna.

[0034] The average value of the second amplitude is calculated based on multiple values ​​of the second amplitude.

[0035] The second amplitude deviation corresponding to each of the receiving channels is calculated based on the second amplitude average and multiple second amplitude values;

[0036] Data correction processing is performed on multiple second amplitude deviations to obtain multiple second target amplitude deviations after data correction processing;

[0037] The average value of the second phase is calculated based on multiple second phase values;

[0038] The second phase deviation corresponding to each of the receiving channels is calculated based on the second phase average and multiple second phase values;

[0039] Data correction processing is performed on multiple second phase deviations to obtain multiple second target phase deviations after data correction processing;

[0040] Based on the amplitude deviation and phase deviation of the plurality of second targets, a plurality of first receiving calibration coefficients are calculated.

[0041] According to some embodiments of the present invention, after performing data correction processing on a plurality of second amplitude deviations to obtain a plurality of second target amplitude deviations after data correction processing, the process includes:

[0042] The distance between the phased array antenna and the horn antenna is recorded as the first distance;

[0043] Obtain the third distance between each of the receiving channels and the probe of the phased array antenna;

[0044] Based on the first distance, the third distance, and the plurality of second phase values, a plurality of second corrected phase differences are calculated;

[0045] Based on the plurality of second target amplitude deviations and the plurality of second corrected phase differences, a plurality of second emission calibration coefficients are calculated.

[0046] According to some embodiments of the present invention, calibrating the corresponding receiving channel according to the plurality of receiving calibration parameters includes:

[0047] Obtain the second wave control code for each of the receiving channels;

[0048] The first receive calibration wave control code is calculated based on the second wave control code and the first receive calibration coefficient of the same receive channel.

[0049] According to some embodiments of the present invention, calibrating the corresponding receiving channel according to the plurality of receiving calibration parameters includes:

[0050] Obtain the second wave control code for each of the receiving channels;

[0051] The second receive calibration wave control code is calculated based on the second wave control code and the second receive calibration coefficient of the same receive channel.

[0052] Secondly, embodiments of the present invention provide a calibration system for a phased array antenna channel, used to implement the calibration method for a phased array antenna channel as described in the first aspect embodiment above. The system includes a phased array antenna, a horn antenna, a host computer, a beam control box, a data processing module, and a vector network analyzer. The host computer is connected to the beam control box and the data processing module, respectively. The beam control box is connected to the phased array antenna, and the vector network analyzer is connected to the phased array antenna, the horn antenna, and the data processing module, respectively.

[0053] Thirdly, embodiments of the present invention provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the phased array antenna channel calibration method as described in the first aspect embodiment above.

[0054] Fourthly, embodiments of the present invention provide a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, which are used to cause a computer to perform the calibration method for the phased array antenna channel as described in the first aspect embodiment above.

[0055] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0056] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0057] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0058] Figure 1 This is a flowchart of a calibration method for a phased array antenna channel provided in an embodiment of the present invention;

[0059] Figure 2 This is a flowchart illustrating the specific method for calculating the first emission calibration coefficient provided in an embodiment of the present invention;

[0060] Figure 3 This is a flowchart illustrating the specific method for calculating the second emission calibration coefficient provided in an embodiment of the present invention;

[0061] Figure 4 This is provided by the embodiments of the present invention. Figure 1 Flowchart of the specific method for step S300;

[0062] Figure 5 This is provided by another embodiment of the present invention. Figure 1 Flowchart of the specific method for step S300;

[0063] Figure 6 This is a flowchart illustrating the specific method for calculating the first receiving calibration coefficient provided in an embodiment of the present invention.

[0064] Figure 7 This is a flowchart illustrating the specific method for calculating the second receiving calibration coefficient provided in an embodiment of the present invention.

[0065] Figure 8 This is provided by the embodiments of the present invention. Figure 1 Flowchart of the specific method for step S600;

[0066] Figure 9 This is provided by another embodiment of the present invention. Figure 1 Flowchart of the specific method for step S600;

[0067] Figure 10 This is a schematic diagram of the structure of a calibration system for a phased array antenna channel provided in an embodiment of the present invention;

[0068] Figure 11 This is a schematic diagram of the structure of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0069] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0070] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. "Any one" refers to one or more, and "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or multiple items. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0071] It should be noted that the terms "setting," "installing," and "connecting" in the embodiments of this invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this invention in conjunction with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium.

[0072] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0073] In modern phased array antenna systems, precise beam scanning relies on fine-tuning of the phase of each antenna element. However, in practical engineering, factors such as insufficient manufacturing precision, structural asymmetry, inconsistencies in device characteristics, and mutual coupling effects between antenna elements often cause the actual operating parameters of each element to deviate from the design expectations, thus affecting the overall array performance and communication quality. Therefore, to ensure that the performance of the phased array antenna meets design requirements, a calibration process must be used to eliminate these errors as much as possible. However, current mainstream phased array antenna calibration methods generally face problems such as complex operation, strong equipment dependence, and limited applicability. They typically require expensive and complex equipment, such as microwave anechoic chambers and vector network analyzers, and also demand a high level of professional knowledge and practical experience from engineers, making it impossible to achieve the calibration target and thus affecting the performance of the phased array antenna.

[0074] Based on this, embodiments of the present invention provide a calibration method and system for phased array antenna channels, which not only improves the efficiency and accuracy of phased array antenna calibration, but also effectively reduces the cost of the entire calibration process.

[0075] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0076] Firstly, referring to Figure 1 This invention provides a calibration method for a phased array antenna channel, which includes, but is not limited to, steps S100 to S600:

[0077] Step S100: When the distance between the phased array antenna and the horn antenna meets the far-field condition, at least one of the phased array antenna's transmission channels to be calibrated is turned on to transmit the first beam signal to the horn antenna, and the other transmission channels are turned off.

[0078] It should be noted that the calibration process of the phased array antenna channel in this embodiment of the invention is completed under far-field test conditions. Specifically, the distance R between the phased array antenna and the horn antenna is first set to meet the far-field conditions:

[0079]

[0080] Where D is the array aperture and λ is the operating wavelength. For example, assuming the aperture size of the horn antenna is D = 1 meter, the operating frequency is f = 10 GHz, and the wavelength λ = c / f = 3 × 10⁻⁶ 8 / 10×10 9 =0.03 meters, then the far-field distance R f ≥2×(1) 2 / 0.03 ≈ 66.67 meters. Therefore, the distance between the phased array antenna and the horn antenna can be set to 67 meters to meet the far-field condition. It is understandable that in antenna technology, the far-field condition refers to a sufficiently large distance between the antenna and the measurement point, placing the measurement point in the antenna's far-field region. At this point, the propagation characteristics of the electromagnetic wave tend to be stable, and the influence of near-field effects can be ignored. Furthermore, a phased array antenna is an array antenna composed of multiple antenna elements, where each antenna element is a channel. Beam direction control is achieved by controlling the phase and amplitude of each element. A horn antenna is used as an auxiliary measurement antenna to transmit standard beam signals with the phased array antenna and to calibrate the phased array antenna's transmission channel. Furthermore, the transmission mode of the phased array antenna can be calibrated first, that is, the transmission channels of the phased array antenna can be calibrated. Specifically, at least one transmission channel of the phased array antenna to be calibrated is turned on to transmit a first beam signal to the horn antenna, while other transmission channels are turned off. Each transmission channel of the phased array antenna is controlled in sequence to transmit the first beam signal for calibration measurement to the horn antenna. The amplitude and phase of the first beam signal are set in advance by the tester and the same parameters are used throughout the calibration process. Then, the first beam signal is measured by the horn antenna to calibrate the transmission channels, ensuring the signal consistency of each channel, thereby improving the beam direction control accuracy.

[0081] Step S200: Calculate multiple transmission calibration parameters based on the first beam signal received by the horn antenna.

[0082] It is understandable that by measuring the first beam signal received by the horn antenna, multiple transmission calibration parameters are calculated. These transmission calibration parameters can be parameters used to adjust the transmission channels of the phased array antenna. Since each transmission channel in the phased array antenna needs to be calibrated independently, the transmission calibration parameters corresponding to each transmission channel calculated based on the first beam signal are different, thus obtaining multiple transmission calibration parameters corresponding to each transmission channel. For example, the phased array antenna may include 5 transmission channels, and thus 5 transmission calibration parameters are calculated accordingly.

[0083] Step S300: Calibrate the corresponding transmission channel according to multiple transmission calibration parameters.

[0084] It should be noted that the transmission calibration parameters may include amplitude calibration coefficients and phase calibration coefficients. Then, based on different multiple transmission calibration parameters, the corresponding transmission channels are calibrated in amplitude or phase. By adjusting the amplitude and phase of each transmission channel, the consistency of the signal in amplitude and phase of all channels is ensured, thereby improving the beamforming efficiency and making the actual transmission channel meet the design performance requirements of the phased array antenna.

[0085] Step S400: After all the transmitting channels of the phased array antenna have been calibrated, at least one receiving channel of the phased array antenna to be calibrated is turned on to receive the second beam signal transmitted by the horn antenna, and the other receiving channels are turned off.

[0086] Understandably, after completing the calibration of the transmission mode, the receiving mode of the phased array antenna is calibrated, that is, the receiving channel of the phased array antenna is calibrated. Specifically, at least one receiving channel of the phased array antenna to be calibrated is turned on to receive the second beam signal transmitted by the horn antenna, while other receiving channels are turned off. Each receiving channel of the phased array antenna is controlled in sequence to receive the second beam signal transmitted by the horn antenna for calibration measurement. The amplitude and phase of the second beam signal are set in advance by the tester and the same parameters are used throughout the calibration process. Then, the receiving channel is calibrated by measuring the second beam signal through the phased array antenna to ensure the signal consistency of each channel, thereby improving the beam direction control accuracy.

[0087] Step S500: Based on the second beam signal received by the phased array antenna, multiple receiving calibration parameters are calculated.

[0088] It should be noted that multiple receiving calibration parameters are calculated by measuring the second beam signal received by the phased array antenna. These receiving calibration parameters can be parameters used to adjust the receiving channels of the phased array antenna. Since each receiving channel in the phased array antenna needs to be calibrated independently, the receiving calibration parameters corresponding to each receiving channel calculated based on the second beam signal are different, thus obtaining multiple receiving calibration parameters corresponding to each receiving channel. For example, the phased array antenna may include 5 receiving channels, and thus 5 receiving calibration parameters are calculated accordingly.

[0089] Step S600: Calibrate the corresponding receiving channel according to multiple receiving calibration parameters.

[0090] It is understandable that the receiving calibration parameters may include amplitude calibration coefficients and phase calibration coefficients. Then, based on different multiple receiving calibration parameters, the corresponding receiving channels are calibrated for amplitude or phase. By adjusting the amplitude and phase of each receiving channel, the consistency of the signal in amplitude and phase of all channels is ensured, thereby improving the beamforming efficiency and making the actual receiving channel meet the design performance requirements of the phased array antenna.

[0091] The calibration method for phased array antenna channels provided by the present invention enables rapid sequential measurement of each phased array antenna channel by precisely controlling channel switching, and supports joint calibration of transmit and receive channels. It achieves black-box calibration without considering the specific position and initial phase of the channel, and the calibration measurement equipment only requires a vector analyzer. This not only improves the efficiency and accuracy of phased array antenna calibration, but also effectively reduces the cost of the entire calibration process.

[0092] In some embodiments, refer to Figure 2 In step S200, based on the first beam signal received by the horn antenna, multiple transmission calibration parameters are calculated, including but not limited to the following steps S210 to S280:

[0093] Step S210: Analyze the first beam signal received by the horn antenna to obtain the first amplitude value and the first phase value of the corresponding transmission channel to be calibrated. Then return to the step of turning on at least one transmission channel of the phased array antenna to transmit the first beam signal to the horn antenna and turning off other transmission channels until all transmission channels transmit the first beam signal to the horn antenna.

[0094] Step S220: Calculate the average value of the first amplitude based on multiple first amplitude values.

[0095] Step S230: Calculate the first amplitude deviation for each transmission channel based on the first amplitude mean and multiple first amplitude values.

[0096] Step S240: Perform data correction processing on multiple first amplitude deviations to obtain multiple first target amplitude deviations after data correction processing.

[0097] Step S250: Calculate the average value of the first phase based on multiple first phase values.

[0098] Step S260: Calculate the first phase deviation for each transmission channel based on the first phase average and multiple first phase values.

[0099] Step S270: Perform data correction processing on multiple first phase deviations to obtain multiple first target phase deviations after data correction processing.

[0100] Step S280: Calculate multiple first emission calibration coefficients based on multiple first target amplitude deviations and multiple first target phase deviations.

[0101] It is understood that in the embodiments of steps S210 to S280, after the horn antenna receives the first beam signal, the required amplitude and phase information can be obtained by analyzing and processing the first beam signal, that is, obtaining the first amplitude value and first phase value of the corresponding transmission channel to be calibrated. For example, firstly, the first amplitude value and first phase value of transmission channel 1 are recorded, then transmission channel 1 is turned off, and other transmission channels 2, 3, and 4 are turned on in sequence, and the steps of transmitting the first beam signal to the horn antenna and analyzing the first beam signal received by the horn antenna are repeated, thereby obtaining the first amplitude value and first phase value of each transmission channel. Further, based on the multiple first amplitude values ​​obtained for each transmission channel, the first amplitude mean, that is, the average value of multiple first amplitude values, can be calculated. The specific calculation process is shown in the following formula:

[0102]

[0103] Where Ā1 is the first mean amplitude, A k Let i be the first amplitude value of each transmission channel, and i be the number of first amplitude values, i.e., the number of transmission channels.

[0104] Furthermore, the first amplitude mean Ā1 and multiple first amplitude values ​​A1, A2, A3, A4...A1 can be calculated based on the above embodiments. k The first amplitude deviation for each transmission channel is calculated. By comparing the amplitude value of each transmission channel with the mean, outliers can be identified, and the amplitude calibration process for the transmission channels can be optimized. The specific calculation process for the first amplitude deviation is shown in the following formula:

[0105]

[0106] Where Ā1 is the first mean amplitude, Ak The first amplitude value, ΔA i The first amplitude deviation of each transmission channel is ΔA1, for example, the first amplitude deviation of transmission channel 1 is ΔA2, the first amplitude deviation of transmission channel 2 is ΔA3, and so on.

[0107] Furthermore, after obtaining multiple first amplitude deviations, data correction processing can be performed on them. For example, data correction processing can include removing outliers, normalization processing, smoothing processing, etc., thereby obtaining multiple first target amplitude deviations after data correction processing, so as to improve the accuracy and reliability of the data.

[0108] Furthermore, based on the multiple first phase values ​​obtained for each transmission channel, the average first phase value, i.e., the average of multiple first phase values, can be calculated. The specific calculation process is shown in the following formula:

[0109]

[0110] in, The first phase mean, Let i be the first phase value of each transmission channel, and i be the number of first phase values, i.e., the number of transmission channels.

[0111] Furthermore, the first phase mean Ā1 and multiple first phase values ​​calculated based on the above embodiments can be used. , , , ... The first phase deviation for each transmission channel is calculated. By comparing the phase value of each transmission channel with the mean, outliers can be identified, and the phase calibration process for the transmission channels can be optimized. The specific calculation process is shown in the following formula:

[0112]

[0113] in, The first phase mean, This is the first phase value. The first phase deviation of each transmission channel, for example, the first phase deviation of transmission channel 1 is... The first phase deviation of transmission channel 2 is The first phase deviation of transmission channel 3 is etc.

[0114] Furthermore, after obtaining multiple first phase deviations, data correction processing can be performed on them. For example, data correction processing can include removing outliers, normalization processing, smoothing processing, etc., thereby obtaining multiple first target phase deviations after data correction processing, so as to improve the accuracy and reliability of the data.

[0115] Furthermore, after obtaining multiple first target amplitude deviations and multiple first target phase deviations, multiple first transmission calibration coefficients corresponding to each transmission channel can be calculated. The specific calculation process is shown in the following formula:

[0116]

[0117] Where, ω i ΔA is the first launch calibration coefficient for each launch channel. i The first amplitude deviation for each transmission channel. Let i be the first phase deviation of each transmission channel, and i be the number of transmission channels.

[0118] In one embodiment, the data correction process for multiple first amplitude deviations in step S240 may include, but is not limited to, the following steps S241 to S243:

[0119] Step S241: Calculate the first amplitude standard deviation based on multiple first amplitude deviations.

[0120] Step S242: Determine the amplitude deviation correction threshold based on the first amplitude standard deviation.

[0121] Step S243: Remove the first amplitude deviation that is abnormal based on the amplitude deviation correction threshold.

[0122] It should be noted that in the embodiments of steps S241 to S243, since obviously abnormal data may occur during calibration (such as chip damage or amplifier malfunction), a first amplitude standard deviation can be calculated based on multiple first amplitude deviations, and an amplitude deviation correction threshold can be determined based on this first amplitude standard deviation. Then, by comparing each first amplitude deviation with the amplitude deviation correction threshold, abnormal data can be removed. In one embodiment, the amplitude deviation correction threshold can be set to ±3σ. A , where σ A The first amplitude standard deviation is used as the basis for the amplitude deviation correction threshold. Data with amplitude deviations exceeding three times the first amplitude standard deviation can be eliminated to ensure the accuracy and reliability of the calibration data, thereby improving the quality of phased array antenna calibration.

[0123] In one embodiment, the data correction processing for multiple first phase deviations in step S270 may include, but is not limited to, the following steps S271 to S273:

[0124] Step S271: Calculate the first phase standard deviation based on multiple first phase deviations.

[0125] Step S272: Determine the phase deviation correction threshold based on the first phase standard deviation.

[0126] Step S273: Eliminate the first phase deviation that is abnormal based on the phase deviation correction threshold.

[0127] It should be noted that in the embodiments of steps S271 to S273, since obviously abnormal data may occur during calibration (such as chip damage or amplifier malfunction), a first phase standard deviation can be calculated based on multiple first phase deviations, and a phase deviation correction threshold can be determined based on this first phase standard deviation. Then, by comparing each first phase deviation with the phase deviation correction threshold, abnormal data can be removed. In one embodiment, the phase deviation correction threshold can be set to ±3σ. p , where σ p The first phase standard deviation is used as the basis for the phase deviation correction threshold. Data with a first phase deviation exceeding three times the first phase standard deviation can be eliminated to ensure the accuracy and reliability of the calibration data, thereby improving the quality of phased array antenna calibration.

[0128] In some embodiments, refer to Figure 3 After step S240 performs data correction processing on multiple first amplitude deviations to obtain multiple first target amplitude deviations after data correction processing, the process also includes, but is not limited to, the following steps S290 to S2120:

[0129] Step S290: Record the distance between the phased array antenna and the horn antenna as the first distance.

[0130] Step S2100: Obtain the second distance between each transmission channel and the probe of the phased array antenna.

[0131] Step S2110: Calculate multiple first corrected phase differences based on the first distance, the second distance, and multiple first phase values.

[0132] Step S2120: Based on multiple first target amplitude deviations and multiple first correction phase differences, multiple second emission calibration coefficients are calculated.

[0133] It should be noted that in the embodiments of steps S290 to S2120, under far-field conditions, by recording the distance between the phased array antenna and the horn antenna as the first distance, and obtaining the second distance between each transmission channel and the probe of the phased array antenna, multiple first corrected phase differences can be calculated based on the first distance, the second distance, and multiple first phase values. It should be understood that the first corrected phase difference is a further correction value for the first phase deviation, and the specific calculation process is shown in the following formula:

[0134]

[0135] in, The first corrected phase difference for each channel. Let d be the first phase value of each transmission channel. far The first distance, d, is the distance between the phased array antenna and the horn antenna when the far-field condition is met. i The second distance refers to the distance between each transmission channel and the probe of the phased array antenna, where λ is the operating wavelength. Specifically, taking a 16×16 phased array antenna as an example, when the antenna spacing is typically half a wavelength, the antenna size is 8 times the wavelength, the aperture is √128 times the wavelength, and the corresponding far-field distance is 256 times the wavelength. This means the distance between the phased array antenna and the horn antenna meets the far-field condition. The farthest antenna element is √32 times the wavelength from the center, and its distance from the horn antenna is √32 + 256. 2 Its corrected phase difference is √32 + 256. 2 -256 = 0.062, approximately 11 degrees. Therefore, the error is relatively small when using corrected phase differences for phased array antenna calibration, and this error decreases with increasing far-field distance. Therefore, by calculating multiple second transmission calibration coefficients based on multiple first target amplitude deviations and multiple first corrected phase differences, calibration accuracy can be improved. Further, the specific calculation process for the second transmission calibration coefficients is shown in the following formula:

[0136]

[0137] Where, ω' i ΔA represents the second launch calibration coefficient for each launch channel. i The first amplitude deviation for each transmission channel. Let i be the first corrected phase difference for each channel, and i be the number of transmission channels.

[0138] In some embodiments, refer to Figure 4 Step S300 calibrates the corresponding transmission channel according to multiple transmission calibration parameters, including but not limited to the following steps S310 to S320:

[0139] Step S310: Obtain the first wave control code for each transmission channel.

[0140] Step S320: Calculate the first transmission calibration wave control code based on the first wave control code and the first transmission calibration coefficient of the same transmission channel.

[0141] It is understood that in the embodiments of steps S310 to S320, when calibrating the corresponding transmission channels according to multiple transmission calibration parameters, the first wave control code of each transmission channel can be multiplied by the first transmission calibration coefficient of the same transmission channel to calculate the first transmission calibration wave control code, thereby calibrating and compensating the amplitude or phase of the original first wave control code. In one embodiment, the calculation process of the first transmission calibration wave control code is shown in the following formula:

[0142]

[0143] Where, µ i cal For the first transmission calibration wave control code, ω i The first transmit calibration factor for each transmit channel, µ i ideal This is the first wave control code for each transmission channel, where i is the number of transmission channels.

[0144] It should be noted that, taking four transmission channels as an example, the first wave control code for each transmission channel is obtained as µ1. ideal =1·e j0 =1+0j、µ2 ideal =e -j1.5708 =0 - j1, µ3 ideal =e -j3.1416 =﹣1+0j、µ4 ideal =e -j4.7124 =0 + j1, corresponding to the first transmission calibration coefficients for each transmission channel as ω1 = 0.95·e j0.1745 ω2=1.05·e ﹣j0.0873 ω3=0.98·e j0.1396 ω4=1.02·e ﹣j0.0524 Then, the first transmission calibration control code for each transmission channel is multiplied by the first transmission calibration coefficient of the same transmission channel to calculate the first transmission calibration control code, which is µ1. ideal ·ω1=(1+0j)·0.95·e j0.1745 =0.95·e j0.1745 The corresponding amplitude is 0.95 and the phase is 10°; µ2 ideal ·ω2=(0-j1)·1.05·e ﹣j0.0873 = -0.0916 + j1.0460, corresponding to an amplitude of 1.05 and a phase of -95°; µ3ideal ·ω3=(﹣1+0j)·0.98·e j0.1396 = -0.98·e j0.1396 The corresponding amplitude is 0.98 and the phase is 188°; µ4 ideal ·ω4=(0+j1)·1.02·e ﹣j0.0524 =0.0533+j1.0186, corresponding to an amplitude of 1.02 and a phase of 87°.

[0145] In some embodiments, refer to Figure 5 Step S300 calibrates the corresponding transmission channel according to multiple transmission calibration parameters, including but not limited to the following steps S330 to S340:

[0146] Step S330: Obtain the first wave control code for each transmission channel.

[0147] Step S340: Calculate the second transmission calibration wave control code based on the first wave control code and the second transmission calibration coefficient of the same transmission channel.

[0148] It should be noted that in the embodiments of steps S330 to S340, when calibrating the corresponding transmission channels according to multiple transmission calibration parameters, the first wave control code of each transmission channel can be multiplied by the second transmission calibration coefficient of the same transmission channel to calculate the second transmission calibration wave control code, thereby calibrating and compensating the amplitude or phase of the original first wave control code. In one embodiment, the calculation process of the second transmission calibration wave control code is as follows:

[0149]

[0150] Where, µ i cal For the second transmission calibration wave control code, ω' i The second transmission calibration coefficient for each transmission channel, µ i ideal Here, i represents the first wave control code for each transmission channel, and i is the number of transmission channels. It is understood that the specific process and principle of calculating the second transmission calibration wave control code in steps S330 to S340 can be referred to in the above-described steps S310 to S320 and related embodiments for calculating the second transmission calibration wave control code, and will not be repeated here.

[0151] In some embodiments, refer to Figure 6 In step S500, based on the second beam signal received by the phased array antenna, multiple receiving calibration parameters are calculated, including but not limited to the following steps S510 to S580:

[0152] Step S510: Analyze the second beam signal received by the phased array antenna to obtain the second amplitude value and the second phase value of the corresponding receiving channel to be calibrated. Then return to the step of turning on at least one receiving channel of the phased array antenna to receive the second beam signal emitted by the horn antenna and turning off other receiving channels until all receiving channels receive the second beam signal emitted by the horn antenna.

[0153] Step S520: Calculate the average value of the second amplitude based on multiple second amplitude values.

[0154] Step S530: Calculate the second amplitude deviation for each receiving channel based on the second amplitude mean and multiple second amplitude values.

[0155] Step S540: Perform data correction processing on multiple second amplitude deviations to obtain multiple second target amplitude deviations after data correction processing.

[0156] Step S550: Calculate the average value of the second phase based on multiple second phase values.

[0157] Step S560: Calculate the second phase deviation corresponding to each receiving channel based on the second phase average and multiple second phase values.

[0158] Step S570: Perform data correction processing on multiple second phase deviations to obtain multiple second target phase deviations after data correction processing.

[0159] Step S580: Based on the multiple second target amplitude deviations and multiple second target phase deviations, multiple first receiver calibration coefficients are calculated.

[0160] It is understandable that in the embodiments of steps S510 to S580, after the phased array antenna receives the second beam signal, the required amplitude and phase information can be obtained by analyzing and processing the second beam signal, that is, obtaining the second amplitude value and the second phase value of the corresponding receiving channel to be calibrated. For example, firstly, the second amplitude value and the second phase value of receiving channel 1 are recorded, then receiving channel 1 is turned off, and other receiving channels 2, 3, and 4 are turned on in sequence, and the steps of receiving the second beam signal transmitted by the horn antenna and analyzing the second beam signal received by the phased array antenna are repeated, thereby obtaining the second amplitude value and the second phase value of each receiving channel. Further, based on the multiple second amplitude values ​​obtained for each receiving channel, the average second amplitude value, that is, the average value of multiple second amplitude values, can be calculated.

[0161] Furthermore, based on the second amplitude mean and multiple second amplitude values ​​calculated in the above embodiments, the second amplitude deviation corresponding to each receiving channel can be calculated. By comparing the amplitude value of each receiving channel with the mean, outliers can be identified, and the amplitude calibration process of the receiving channel can be optimized.

[0162] Furthermore, after obtaining multiple second amplitude deviations, data correction processing can be performed on them. For example, data correction processing can include removing outliers, normalization processing, smoothing processing, etc., thereby obtaining multiple second target amplitude deviations after data correction processing, so as to improve the accuracy and reliability of the data.

[0163] Furthermore, based on the multiple second phase values ​​obtained for each receiving channel, the average second phase value, i.e., the average of the multiple second phase values, can be calculated. Further, based on the average second phase value and the multiple second phase values ​​calculated in the above embodiment, the second phase deviation corresponding to each receiving channel can be calculated. By comparing the phase value of each receiving channel with the average value, outliers can be identified, and the phase calibration process of the receiving channel can be optimized.

[0164] Furthermore, after obtaining multiple second phase deviations, data correction processing can be performed on them. For example, data correction processing can include removing outliers, normalization processing, smoothing processing, etc., thereby obtaining multiple second target phase deviations after data correction processing, so as to improve the accuracy and reliability of the data.

[0165] Furthermore, after obtaining multiple second target amplitude deviations and multiple second target phase deviations, multiple first receiving calibration coefficients corresponding to each receiving channel can be calculated.

[0166] It should be noted that the specific steps for calculating the second amplitude mean, second amplitude deviation, second phase mean, second phase deviation, and first receiving calibration coefficient in steps S510 to S580 above, as well as the specific process and principle of data correction processing, are similar to the embodiments of steps S210 to S280 above. You can refer to the embodiments of steps S210 to S280 and their related calculation of transmission calibration parameters above, which will not be repeated here.

[0167] In some embodiments, refer to Figure 7 After step S540 performs data correction processing on multiple second amplitude deviations to obtain multiple second target amplitude deviations after data correction processing, the process also includes, but is not limited to, the following steps S590 to S5120:

[0168] Step S590: Record the distance between the phased array antenna and the horn antenna as the first distance.

[0169] Step S5100: Obtain the third distance between each receiving channel and the probe of the phased array antenna.

[0170] Step S5110: Calculate multiple second corrected phase differences based on the first distance, the third distance, and multiple second phase values.

[0171] Step S5120: Calculate multiple second receiving calibration coefficients based on multiple second target amplitude deviations and multiple second corrected phase differences.

[0172] In the embodiments of steps S590 to S5120, under far-field conditions, by recording the distance between the phased array antenna and the horn antenna as a first distance, and obtaining a third distance between each receiving channel and the probe of the phased array antenna, multiple second corrected phase differences can be calculated based on the first distance, the third distance, and multiple second phase values. It should be understood that the second corrected phase difference is a further correction value for the second phase deviation. Furthermore, multiple second receiving calibration coefficients are calculated based on multiple second target amplitude deviations and multiple second corrected phase differences, which can improve calibration accuracy.

[0173] It should be noted that the specific process and principle of calculating the second corrected phase difference and the second receiving calibration coefficient, etc., in steps S590 to S5120 are similar to the embodiments of steps S290 to S2120. You can refer to the embodiments of steps S290 to S2120 and their related steps, which will not be repeated here.

[0174] In some embodiments, refer to Figure 8 Step S600 calibrates the corresponding receiving channel according to multiple receiving calibration parameters, including but not limited to the following steps S610 to S620:

[0175] Step S610: Obtain the second wave control code for each receiving channel.

[0176] Step S620: Calculate the first receiving calibration wave control code based on the second wave control code and the first receiving calibration coefficient of the same receiving channel.

[0177] It is understood that in the embodiments of steps S610 to S620, when calibrating the corresponding receiving channel according to multiple receiving calibration parameters, the second wave control code of each receiving channel can be multiplied by the first receiving calibration coefficient of the same receiving channel to calculate the first receiving calibration wave control code, thereby calibrating and compensating the amplitude or phase of the original second wave control code.

[0178] It should be noted that the specific process and principle of calculating the first receive calibration wave control code in steps S610 to S620 are similar to the embodiment of calculating the first transmit calibration wave control code in steps S310 to S320. You can refer to the embodiment of steps S310 to S320 and their related steps, which will not be repeated here.

[0179] In some embodiments, refer to Figure 9 Step S600 calibrates the corresponding receiving channel according to multiple receiving calibration parameters, including but not limited to the following steps S630 to S640:

[0180] Step S630: Obtain the second wave control code for each receiving channel.

[0181] Step S640: Calculate the second receive calibration wave control code based on the second wave control code and the second receive calibration coefficient of the same receive channel.

[0182] It is understood that in the embodiments of steps S630 to S640, when calibrating the corresponding receiving channel according to multiple receiving calibration parameters, the second wave control code of each receiving channel can be multiplied with the second receiving calibration coefficient of the same receiving channel to calculate the second receiving calibration wave control code, thereby calibrating and compensating the amplitude or phase of the original second wave control code.

[0183] It should be noted that the specific process and principle of calculating the second receive calibration wave control code in steps S630 to S640 are similar to the embodiment of calculating the first transmit calibration wave control code in steps S310 to S320. You can refer to the embodiment of steps S310 to S320 and their related steps, which will not be repeated here.

[0184] Secondly, referring to Figure 10 , Figure 10 This is a schematic diagram of the structure of the phased array antenna channel calibration system provided in the embodiment of the present invention. The present invention also provides a phased array antenna channel calibration system for implementing the phased array antenna channel calibration method of the first aspect embodiment above. The system includes a phased array antenna, a horn antenna, a host computer, a wave control box, a data processing module, and a vector network analyzer. The host computer is connected to the wave control box and the data processing module, the wave control box is connected to the phased array antenna, and the vector network analyzer is connected to the phased array antenna, the horn antenna, and the data processing module.

[0185] Thirdly, referring to Figure 11 , Figure 11This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present invention. The electronic device 1000 includes: a memory 1010, a processor 1020, and a computer program stored in the memory 1010 and executable on the processor 1020. When the processor 1020 executes the computer program, it implements the calibration method for the phased array antenna channel as described in the first aspect embodiment above.

[0186] The memory 1010, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the phased array antenna channel calibration method in the above embodiments of the present invention. The processor 1020 implements the phased array antenna channel calibration method in the above embodiments of the present invention by running the non-transitory software program and instructions stored in the memory 1010.

[0187] The memory 1010 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function. The data storage area may store data required for executing the calibration method of the phased array antenna channel in the above embodiments. Furthermore, the memory 1010 may include high-speed random access memory (RAM) 1010, and may also include non-transitory memory 1010, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. It should be noted that the memory 1010 may optionally include memory 1010 remotely located relative to the processor 1020, and these remote memories 1010 can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks (LANs), mobile communication networks, and combinations thereof.

[0188] The non-transient software program and instructions required to implement the phased array antenna channel calibration method in the above embodiments are stored in the memory. When executed by one or more processors, the phased array antenna channel calibration method in the above embodiments is executed. For example, steps S100 to S600, S210 to S280, S241 to S243, S271 to S273, S290 to S2120, S310 to S320, S330 to S340, S510 to S580, S590 to S5120, S610 to S620, and S630 to S640 of any of the above embodiments are executed.

[0189] Thirdly, the present invention also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a calibration method for a phased array antenna channel as described in the first aspect embodiment above, for example, performing method steps S100 to S600, S210 to S280, S241 to S243, S271 to S273, S290 to S2120, S310 to S320, S330 to S340, S510 to S580, S590 to S5120, S610 to S620, and S630 to S640 of any of the above embodiments.

[0190] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include computer storage media or non-transitory media and communication media or transient media. As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc DVD or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0191] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A calibration method for a phased array antenna channel, characterized in that, include: When the distance between the phased array antenna and the horn antenna meets the far-field condition, at least one of the phased array antenna's transmission channels to be calibrated is turned on to transmit the first beam signal to the horn antenna, while other transmission channels are turned off. Based on the first beam signal received by the horn antenna, multiple transmission calibration parameters are calculated; The corresponding transmission channels are calibrated according to the plurality of transmission calibration parameters; After all the transmitting channels of the phased array antenna have been calibrated, at least one receiving channel of the phased array antenna to be calibrated is turned on to receive the second beam signal transmitted by the horn antenna, and the other receiving channels are turned off. The second beam signal received by the phased array antenna is analyzed to obtain the second amplitude value and the second phase value corresponding to the receiving channel to be calibrated. Then, the process returns to the step of turning on at least one receiving channel of the phased array antenna to receive the second beam signal emitted by the horn antenna and turning off other receiving channels until all receiving channels receive the second beam signal emitted by the horn antenna. The average value of the second amplitude is calculated based on multiple values ​​of the second amplitude. The second amplitude deviation corresponding to each of the receiving channels is calculated based on the second amplitude average and multiple second amplitude values; Data correction processing is performed on multiple second amplitude deviations to obtain multiple second target amplitude deviations after data correction processing; The average value of the second phase is calculated based on multiple second phase values; The second phase deviation corresponding to each of the receiving channels is calculated based on the second phase average and multiple second phase values; Data correction processing is performed on multiple second phase deviations to obtain multiple second target phase deviations after data correction processing; Based on the plurality of second target amplitude deviations and the plurality of second target phase deviations, a plurality of first receiver calibration coefficients are calculated; Obtain the second wave control code for each of the receiving channels; The first receive calibration wave control code is calculated based on the second wave control code and the first receive calibration coefficient of the same receive channel.

2. The calibration method for a phased array antenna channel according to claim 1, characterized in that, The calculation of multiple transmission calibration parameters based on the first beam signal received by the horn antenna includes: The first beam signal received by the horn antenna is analyzed to obtain the first amplitude value and the first phase value corresponding to the transmission channel to be calibrated. Then, the process returns to the step of turning on at least one transmission channel of the phased array antenna to transmit the first beam signal to the horn antenna and turning off the other transmission channels, until all the transmission channels transmit the first beam signal to the horn antenna. The first amplitude mean is calculated based on multiple first amplitude values; Based on the first amplitude average and multiple first amplitude values, the first amplitude deviation corresponding to each of the transmission channels is calculated; Data correction processing is performed on multiple first amplitude deviations to obtain multiple first target amplitude deviations after data correction processing; The average value of the first phase is calculated based on multiple first phase values; Based on the first phase average and multiple first phase values, the first phase deviation corresponding to each of the transmission channels is calculated; Data correction processing is performed on multiple first phase deviations to obtain multiple first target phase deviations after data correction processing; Based on the plurality of first target amplitude deviations and the plurality of first target phase deviations, a plurality of first launch calibration coefficients are calculated.

3. The calibration method for a phased array antenna channel according to claim 2, characterized in that, After performing data correction processing on the plurality of first amplitude deviations to obtain the plurality of first target amplitude deviations after data correction processing, the method further includes: The distance between the phased array antenna and the horn antenna is recorded as the first distance; Obtain the second distance between each of the transmission channels and the probe of the phased array antenna; Based on the first distance, the second distance, and the plurality of first phase values, a plurality of first corrected phase differences are calculated; Based on the plurality of first target amplitude deviations and the plurality of first corrected phase differences, a plurality of second emission calibration coefficients are calculated.

4. The calibration method for a phased array antenna channel according to claim 2, characterized in that, The calibration of the corresponding transmission channel based on the plurality of transmission calibration parameters includes: Obtain the first wave control code for each of the aforementioned transmission channels; The first transmission calibration wave control code is calculated based on the first wave control code and the first transmission calibration coefficient of the same transmission channel.

5. The calibration method for a phased array antenna channel according to claim 3, characterized in that, The calibration of the corresponding transmission channel based on the plurality of transmission calibration parameters includes: Obtain the first wave control code for each of the aforementioned transmission channels; The second transmission calibration wave control code is calculated based on the first wave control code and the second transmission calibration coefficient of the same transmission channel.

6. The calibration method for a phased array antenna channel according to claim 1, characterized in that, After performing data correction processing on the multiple second amplitude deviations to obtain multiple second target amplitude deviations after data correction processing, the method further includes: The distance between the phased array antenna and the horn antenna is recorded as the first distance; Obtain the third distance between each of the receiving channels and the probe of the phased array antenna; Based on the first distance, the third distance, and the plurality of second phase values, a plurality of second corrected phase differences are calculated; Based on the plurality of second target amplitude deviations and the plurality of second corrected phase differences, a plurality of second receiving calibration coefficients are calculated.

7. The calibration method for a phased array antenna channel according to claim 6, characterized in that, The method further includes: Obtain the second wave control code for each of the receiving channels; The second receive calibration wave control code is calculated based on the second wave control code and the second receive calibration coefficient of the same receive channel.

8. A calibration system for a phased array antenna channel, characterized in that, The system is used to implement the calibration method for a phased array antenna channel as described in any one of claims 1 to 7. The system includes a phased array antenna, a horn antenna, a host computer, a wave control box, a data processing module, and a vector network analyzer. The host computer is connected to the wave control box and the data processing module, respectively. The wave control box is connected to the phased array antenna, and the vector network analyzer is connected to the phased array antenna, the horn antenna, and the data processing module, respectively.

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