A passive automatic test system based on a far field environment

Abstract

The application discloses a kind of passive automatic test system based on far field environment, including rotating device, and the antenna to be measured and standard antenna are placed in upper end;Transmitting antenna emits pulse signal to the antenna to be measured and standard antenna, and the antenna to be measured generates test feedback signal, and standard antenna generates standard feedback signal;Signal receiving module processes and obtains far field test data and standard test data;First computing unit obtains the difference between standard test data and standard theoretical data to obtain environmental signal deviation amount;Second computing unit obtains first dynamic lag amount and second dynamic lag amount;Formula establishment unit establishes environmental interference formula;Third computing unit inputs environmental interference formula with first dynamic lag amount, ambient temperature and resistance thermal noise to obtain test signal deviation amount;Correction unit is corrected according to test signal deviation amount to far field test data and obtains far field correction data.The application improves the detection precision of the antenna to be measured in antenna automatic test process.

Description

Technical Field

[0001] This invention relates to the field of automatic testing and measurement technology, and in particular to a passive automatic testing system based on a far-field environment. Background Technology

[0002] Antennas are a crucial component in applications such as communications and radar, and the testing and verification of antenna parameters are indispensable processes in antenna design. The main content of antenna testing involves measuring the antenna's electrical and radiation parameters to evaluate its performance. To improve the efficiency of antenna testing, automatic antenna testing systems emerged in the 1970s. After decades of development, mature automatic antenna testing systems are now available both domestically and internationally, such as the antenna testing system produced by Orbit in Israel and the automatic antenna measurement system produced by MTI in the United States. Domestically, the Ministry of Electronics Industry's 41st Research Institute produces its own automatic antenna testing system. Since the 1970s, the performance indicators of these measurement systems have continuously improved, and their functions have been further enhanced, enabling them to automatically complete near-field and far-field antenna measurements within the 0.1 GHz to 90 GHz frequency band.

[0003] Currently, existing automatic antenna testing systems are often affected by factors such as dynamic hysteresis, zero-point drift, and resistive thermal noise during the testing of antennas under test, resulting in insufficient antenna detection accuracy. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a passive automatic testing system based on far-field environment to improve the detection accuracy of the antenna under test during the automatic antenna testing process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a passive automatic testing system based on a far-field environment, comprising:

[0006] A rotating device, wherein the antenna to be tested and a standard antenna are placed on the upper end of the rotating device;

[0007] A transmitting antenna is positioned opposite to the antenna under test. The transmitting antenna, the standard antenna, and the antenna under test are all located in the far-field environment. The transmitting antenna transmits a pulse signal to the antenna under test and the standard antenna. The antenna under test generates a test feedback signal based on the pulse signal, and the standard antenna generates a standard feedback signal based on the pulse signal.

[0008] A signal receiving module, connected to the antenna under test, is used to process the test feedback signal to obtain far-field test data and process the standard feedback signal to obtain standard test data.

[0009] An environmental detection module is used to detect in real time the ambient temperature in the far-field environment area, the first angular velocity and first angular acceleration of the antenna under test when it rotates on the rotating device, the second angular velocity and second angular acceleration of the standard antenna when it rotates on the rotating device, the first resistive thermal noise of the antenna under test, and the second resistive thermal noise of the standard antenna.

[0010] The upper-level control module, connected to both the signal receiving module and the environmental detection module, includes:

[0011] The first calculation unit is used to calculate the difference between the standard test data and the preset standard theoretical data to obtain the environmental signal deviation.

[0012] The second calculation unit is used to calculate a first dynamic hysteresis based on the first angular velocity and the first angular acceleration, and to calculate a second dynamic hysteresis based on the second angular velocity and the second angular acceleration.

[0013] The formula establishment unit is connected to the first calculation unit and the second calculation unit respectively, and is used to establish an environmental interference formula based on the ambient temperature, the second dynamic hysteresis, the second resistive thermal noise and the deviation of the environmental signal.

[0014] The third calculation unit, connected to the formula establishment unit, is used to input the first dynamic hysteresis, the ambient temperature and the second resistive thermal noise into the environmental interference formula to obtain the test signal deviation.

[0015] The correction unit, connected to the third calculation unit, is used to correct the far-field test data according to the test signal deviation to obtain far-field corrected data.

[0016] Furthermore, the second calculation unit substitutes the first angular velocity and the first angular acceleration into a preset dynamic lag calculation formula to obtain the first dynamic lag amount, and substitutes the second angular velocity and the second angular acceleration into the dynamic lag calculation formula to obtain the second dynamic lag amount;

[0017] The dynamic lag calculation formula is configured as follows:

[0018]

[0019] Among them, D h Used to represent dynamic lag;

[0020] ω is used to represent angular velocity;

[0021] α is used to represent angular acceleration;

[0022] k ωUsed to represent a preset angular velocity constant;

[0023] k α Used to represent a preset angular acceleration constant.

[0024] Furthermore, the environmental interference formula is configured as follows:

[0025]

[0026] Among them, E d Used to indicate signal deviation;

[0027] T a Used to indicate the ambient temperature;

[0028] R n Used to represent resistive thermal noise;

[0029] k T Used to represent a preset temperature constant;

[0030] k D Used to represent the preset hysteresis constant;

[0031] k R Used to represent a preset noise constant;

[0032] This is used to represent the average value of the temperature constant, the hysteresis constant, and the noise constant.

[0033] Furthermore, the correction unit inputs the test signal deviation and the far-field test data into a preset correction equation to obtain the far-field correction data;

[0034] The correction equation is configured as follows:

[0035] m(x) = E d1 +K i f(x), 0 <K i <1;

[0036] Wherein, is used to represent the far-field correction data described in m(x);

[0037] f(x) is used to represent far-field test data;

[0038] K i Used to indicate the preset correction factor;

[0039] E d1 Used to represent the deviation of the test signal.

[0040] Furthermore, the far-field test data includes antenna test power and antenna test gain, and the standard test data includes antenna standard power and antenna standard gain. Therefore, the signal receiving module includes a gain calculation unit, which is used to input the antenna test power, the antenna standard power, and the antenna standard gain into a preset gain calculation formula to obtain the antenna test gain.

[0041] Furthermore, the gain calculation formula is configured as follows:

[0042] Gt = Pt - Ps + Gs;

[0043] Wherein, Gt is used to represent the antenna test gain;

[0044] Pt is used to represent the antenna test power;

[0045] Ps is used to represent the standard power of the antenna;

[0046] Gs is used to represent the standard gain of the antenna.

[0047] Furthermore, the rotating device is provided with four axes, and the upper control module also includes a rotation control unit, which is used to configure and select priority, scan start position, scan end position, scan step and rotation speed for each axis.

[0048] Furthermore, the upper-level control module also includes a parameter setting unit, used to set the start frequency and cutoff frequency of the standard antenna and the antenna under test respectively, or to set the center frequency and scanning bandwidth, as well as to set the number of scanning frequency points, transmission power and intermediate frequency bandwidth.

[0049] Furthermore, the upper-level control module also includes a scanning setting unit, used to set the travel mode and scanning method of the rotating device, and to set the polarization mode of the antenna under test.

[0050] Furthermore, the upper-level control module also includes an analysis and generation unit connected to the correction unit, used to process the far-field correction data to obtain a test report and an antenna pattern.

[0051] The beneficial effects of this invention are:

[0052] This invention provides real-time detection of the ambient temperature within the far-field environment, the first angular velocity and first angular acceleration of the antenna under test (DUT) rotating on the rotating device, the second angular velocity and second angular acceleration of the standard antenna rotating on the rotating device, the first resistive thermal noise of the DUT, and the second resistive thermal noise of the standard antenna. A second dynamic hysteresis is then calculated based on the second angular velocity and second angular acceleration. An environmental interference formula is then established based on the ambient temperature, the second dynamic hysteresis, the second resistive thermal noise, and the deviation from the environmental signal. This formula is used to calculate the test signal deviation, which represents the test disturbance caused by the combined interference of dynamic hysteresis, zero-point drift, and resistive thermal noise in the current far-field test environment. Finally, the test signal deviation is used to correct the far-field test data to obtain corrected far-field data. The corrected far-field data filters out the dynamic hysteresis during the rotation of the rotating device, the zero-point drift caused by temperature changes, and the test disturbance caused by resistive thermal noise. Therefore, the corrected far-field data can more accurately characterize the antenna test results in the far-field test environment, improving the detection accuracy of the DUT during automatic antenna testing. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the passive automatic testing system based on the far-field environment in this invention.

[0054] Reference numerals in the attached figures: 1. Rotating device; 2. Transmitting antenna; 3. Antenna under test; 4. Standard antenna; 5. Signal receiving module; 6. Environmental detection module; 7. Upper control module; 71. First calculation unit; 72. Second calculation unit; 73. Formula establishment unit; 74. Third calculation unit; 75. Correction unit; 76. Parameter setting unit; 77. Scan setting unit; 78. Analysis and generation unit; 79. Rotation control unit. Detailed Implementation

[0055] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0056] like Figure 1 As shown, this embodiment of a passive automatic testing system based on a far-field environment includes...

[0057] Rotating device 1, with the antenna under test 3 and standard antenna 4 placed on the upper end of rotating device 1;

[0058] The transmitting antenna 2 is positioned opposite to the antenna under test 3. The transmitting antenna 2, the standard antenna 4, and the antenna under test 3 are all located in the far-field environment. The transmitting antenna 2 transmits pulse signals to the antenna under test 3 and the standard antenna 4. The antenna under test 3 generates a test feedback signal based on the pulse signal, and the standard antenna 4 generates a standard feedback signal based on the pulse signal.

[0059] The signal receiving module 5 is connected to the antenna under test 3 and is used to obtain far-field test data based on the test feedback signal and to obtain standard test data based on the standard feedback signal.

[0060] The environmental detection module 6 is used to detect in real time the ambient temperature in the far-field environment area, the first angular velocity and first angular acceleration of the antenna under test 3 when it rotates on the rotating device 1, the second angular velocity and second angular acceleration of the standard antenna 4 when it rotates on the rotating device 1, the first resistive thermal noise of the antenna under test 3 and the second resistive thermal noise of the standard antenna 4.

[0061] The upper-level control module 7, connected to the signal receiving module 5 and the environmental detection module 6 respectively, includes:

[0062] The first calculation unit 71 is used to calculate the difference between the standard test data and the preset standard theoretical data to obtain the environmental signal deviation.

[0063] The second calculation unit 72 is used to calculate the first dynamic hysteresis based on the first angular velocity and the first angular acceleration, and to calculate the second dynamic hysteresis based on the second angular velocity and the second angular acceleration.

[0064] Formula establishment unit 73 is connected to the first calculation unit 71 and the second calculation unit 72 respectively, and is used to establish an environmental interference formula based on ambient temperature, second dynamic hysteresis, second resistance thermal noise and environmental signal deviation.

[0065] The third calculation unit 74 is connected to the formula establishment unit 73, which is used to input the first dynamic hysteresis, ambient temperature and second resistance thermal noise into the environmental interference formula to obtain the test signal deviation.

[0066] The correction unit 75 is connected to the third calculation unit 74 and is used to correct the far-field test data according to the test signal deviation to obtain far-field corrected data.

[0067] Specifically, in this embodiment, the rotating device 1 can be a turntable, and the upper control module 7 can be a host computer with automatic testing software installed. The automatic testing software can run on Windows 7 and above systems and is the control core of the passive automatic testing system. The signal receiving module 5 can be a vector network analyzer. The vector network analyzer uses the ZNA series, ZVB series, PNA series produced by R&S, and the ENA series produced by KeySight, etc. It can be directly connected to a network cable. The input and output terminals are connected to the antenna under test 3 and the transmitting antenna 2 through RF cables, respectively. It can transmit pulse signals to the standard antenna 4 and the antenna under test 3, and simultaneously display the far-field test data reflected by the antenna under test 3, including the antenna power value. A signal amplifier can also be provided between the output terminal of the vector network analyzer and the transmitting antenna 2 to input control signals to the transmitting antenna 2, so as to make the pulse signal transmitted by the transmitting antenna 2 more stable. The signal amplifier can amplify the signal when the signal strength is relatively low. If the amplifier link is relatively simple, sometimes the amplifier control box is not needed, and a hardware switch can be used directly, thereby simplifying the software development process. Both the signal amplifier and the turntable are equipped with control boxes. The upper-level control module 7 controls the signal amplifier and the turntable by connecting to the corresponding control boxes via cables. In a preferred embodiment, the turntable includes two parts: a test turntable and a transmission turntable, each controlled by a separate control box. The antenna under test 3 and the standard antenna 4 are mounted on the test turntable, and the transmission antenna 2 is mounted on the transmission turntable. The environmental detection module 6 includes a temperature sensor, an angular velocity sensor, an angular acceleration sensor, and a precision bridge. The temperature sensor is used to detect the ambient temperature in real time; the angular velocity sensor is used to detect the first and second angular velocities of the antenna under test 3 and the standard antenna 4 in real time; the angular acceleration sensor is used to detect the first and second angular accelerations of the antenna under test 3 and the standard antenna 4 in real time; and the precision bridge is used to detect the first and second resistive thermal noise of the antenna under test 3 and the standard antenna 4 in real time. The automatic test software is pre-set with standard theoretical data, which is the test data of the standard antenna 4 under ideal conditions, unaffected by dynamic hysteresis, zero-point drift, and resistive thermal noise. The environmental signal deviation is obtained by subtracting the standard test data from the standard theoretical data. This deviation reflects the test disturbance of the standard antenna 4 under the current far-field test environment after dynamic hysteresis, zero-point drift, and combined interference from resistive thermal noise, compared to the ideal condition. The automatic test software then calculates the first dynamic hysteresis based on the first angular velocity and the first angular acceleration, and the second dynamic hysteresis based on the second angular velocity and the second angular acceleration. Since the antenna under test 3 and the standard antenna 4 are set on a turntable, theoretically the first angular velocity and the second angular velocity are the same, and the first angular acceleration and the second angular acceleration are the same.The automatic testing software establishes an environmental interference formula based on ambient temperature, the second dynamic hysteresis, the second resistor thermal noise, and the environmental signal deviation. By inputting the first dynamic hysteresis, ambient temperature, and the second resistor thermal noise into the environmental interference formula, the test disturbance caused by the combined interference of dynamic hysteresis, zero-point drift, and resistor thermal noise in the current far-field test environment of the antenna under test 3 can be calculated, and expressed as the test signal deviation. Finally, the far-field test data is corrected using the test signal deviation to obtain far-field corrected data. The corrected far-field corrected data filters out the test disturbance caused by the dynamic hysteresis during the rotation of the rotating device 1, the zero-point drift caused by temperature changes, and the resistor thermal noise during signal testing. Therefore, the far-field corrected data can more accurately characterize the antenna test results in the far-field test environment, improving the detection accuracy of the antenna under test 3 during the automatic antenna testing process.

[0068] Preferably, the second calculation unit 72 substitutes the first angular velocity and the first angular acceleration into a preset dynamic lag calculation formula to obtain the first dynamic lag amount, and substitutes the second angular velocity and the second angular acceleration into the dynamic lag calculation formula to obtain the second dynamic lag amount;

[0069] The dynamic lag calculation formula is configured as follows:

[0070]

[0071] Among them, D h Used to represent dynamic lag;

[0072] ω is used to represent angular velocity;

[0073] α is used to represent angular acceleration;

[0074] k ω Used to represent a preset angular velocity constant;

[0075] k α Used to represent a preset angular acceleration constant.

[0076] Specifically, in this embodiment, the angular velocity constant and angular acceleration constant can be preset in the automatic testing software. These constants control the rotational speed and acceleration of the rotating device. Angular velocity is inversely proportional to the angular velocity constant, and angular acceleration is also inversely proportional to the angular acceleration constant. The influence of angular velocity on dynamic hysteresis is obtained by dividing angular velocity by the angular velocity constant, and the influence of angular acceleration on dynamic hysteresis is obtained by dividing angular acceleration by the angular acceleration constant. The sum of these two values ​​yields the dynamic hysteresis.

[0077] Preferably, the environmental interference formula is configured as follows:

[0078]

[0079] Among them, E d Used to indicate signal deviation;

[0080] T a Used to indicate ambient temperature;

[0081] R n Used to represent resistive thermal noise;

[0082] k T Used to represent a preset temperature constant;

[0083] k D Used to represent the preset hysteresis constant;

[0084] k R Used to represent a preset noise constant;

[0085] Used to represent the mean of temperature constant, hysteresis constant, and noise constant.

[0086] Specifically, in this embodiment, the temperature constant, hysteresis constant, and noise constant are used to represent the interference weights of zero-point drift, dynamic hysteresis, and resistive thermal noise in the current far-field test environment, respectively. These constants vary in different far-field test environments and need to be set in advance in the automated test software. By assigning a temperature constant to the ambient temperature, a noise constant to the resistive thermal noise, and a noise constant to the dynamic hysteresis, and then summing these values ​​and taking the square root, finally dividing by the mean of the temperature constant, hysteresis constant, and noise constant, accurate calculation of the combined disturbance of dynamic hysteresis, zero-point drift, and resistive thermal noise during antenna testing is achieved in the current far-field test environment.

[0087] Preferably, the correction unit 75 inputs the test signal deviation and far-field test data into a preset correction equation to obtain far-field correction data;

[0088] The correction equation is configured as follows:

[0089] m(x) = E d1 +K i f(x), 0 <K i <1;

[0090] Where, is used to represent the far-field correction data of m(x);

[0091] f(x) is used to represent far-field test data;

[0092] K i Used to indicate the preset correction factor;

[0093] E d1 Used to indicate the deviation of the test signal.

[0094] Specifically, in this embodiment, by allocating a correction factor to the far-field test data and adding it to the test signal deviation, the far-field corrected data is obtained. This allows for the correction of the far-field test data and improves the accuracy of the antenna test data.

[0095] Preferably, the far-field test data includes antenna test power and antenna test gain, and the standard test data includes antenna standard power and antenna standard gain. Then, the signal receiving module 5 includes a gain calculation unit, which is used to input the antenna test power, antenna standard power and antenna standard gain into a preset gain calculation formula to obtain the antenna test gain.

[0096] Specifically, in this embodiment, the automatic testing software also includes the following components: a device management unit, a gain calculation unit, and an analysis generation unit 78. The device management unit allows testers to add devices used during testing. These devices typically include turntables and vector network analyzers. The unit then sets the names, IP addresses, and port numbers of the turntables and vector network analyzers, selects the corresponding device models, and connects to the turntables and vector network analyzers via TCP.

[0097] Then, the passive test scenario is entered, which includes three interfaces: test, calibration, and analysis. To obtain the antenna test gain of the test antenna, the gain calculation unit first needs to import the calibration file. If no calibration file exists, it needs to be synthesized using the calibration function. The antenna test gain is then calculated by adding the standard antenna power and standard antenna gain from the calibration file to the acquired antenna test power.

[0098] The steps for generating calibration files are as follows:

[0099] In the calibration interface, import the gain file of standard antenna 4, i.e., the standard antenna gain (xls or xlsx format).

[0100] Use the turntable rotation function to adjust the position of each axis of the turntable to ensure that the standard antenna 4 and the transmitting antenna 2 are aligned. Generally, they are aligned when the turntable azimuth angle is 0°.

[0101] Then, set the test parameters for the vector network analyzer and acquire the standard antenna power of standard antenna 4. This standard antenna power varies with frequency and will be displayed in tables and curves on the interface. At this point, the software combines the standard antenna gain and standard antenna power into a single calibration file.

[0102] Export and save the calibration file. The exported file name is synchronized in the test interface and used for antenna gain testing. When testing again, the antenna test gain of antenna 3 under test can be directly calculated based on the calibration file.

[0103] Preferably, the gain calculation formula is configured as follows:

[0104] Gt = Pt - Ps + Gs;

[0105] Wherein, Gt is used to represent the antenna test gain;

[0106] Pt is used to represent the antenna test power;

[0107] Ps is used to represent the standard antenna power;

[0108] Gs is used to represent the standard gain of the antenna.

[0109] Preferably, the rotating device 1 has four axes, and the upper control module 7 also includes a rotation control unit 79, which is used to configure and select priority, scan start position, scan end position, scan step and rotation speed for each axis.

[0110] Specifically, in this embodiment, the test turntable has four axes: a horizontal axis, a polarization axis, a forward / backward translation axis, and a left / right translation axis. The horizontal and polarization axes are used to test the radiation pattern, while the forward / backward and left / right translation axes are used to move the position of the antenna under test (AUT) 3 to align it with the center of the transmitting antenna 2. The horizontal and elevation axes have rotation ranges of -180° to 180° and 0° to 360°, respectively, used to test the gain of the AUT 3 in different directions. During testing, the priority of the axes to be used can be selected according to the actual test items, and unused axes can be selected as "None" to hide them. For the used axes, their scan start position, scan end position, scan step, and rotation speed can be set.

[0111] Preferably, the upper control module 7 further includes a parameter setting unit 76, which is used to set the start frequency and cutoff frequency of the standard antenna 4 and the antenna under test 3 respectively, or to set the center frequency and scanning bandwidth, as well as to set the number of scanning frequency points, transmission power and intermediate frequency bandwidth.

[0112] Specifically, in this embodiment, the vector network parameter settings in the automatic testing software are divided into Linear mode and List mode. In Linear mode, the start and stop frequencies of the test can be set, or the center frequency and scanning bandwidth can be set, as well as the number of scanning frequency points, transmit power, and intermediate frequency bandwidth. In manual frequency point mode, selecting List mode and clicking the "Edit" button will bring up a dialog box for adding frequency points. Clicking the "+" button allows you to manually add each scanning frequency point, or directly import a saved frequency point list file to meet the requirements of frequency point testing with unequal spacing.

[0113] Preferably, the upper control module 7 further includes a scanning setting unit 77, which is used to set the travel mode and scanning method of the rotating device 1, and to set the polarization method of the antenna 3 under test.

[0114] Specifically, in this embodiment, the travel mode in the automatic testing software can be set to step, continuous, or triggered; the scanning mode can be set to unidirectional or bidirectional; and the polarization methods include: horizontal polarization, vertical polarization, circular polarization, cross polarization, and fixed polarization.

[0115] Preferably, the upper control module 7 further includes an analysis and generation unit 78 connected to the correction unit 75, used to process the far-field correction data to obtain a test report and antenna pattern.

[0116] Specifically, in this embodiment, the analysis and generation unit 78 can complete the antenna direction test, data analysis, and report generation, thereby saving the time of manually setting up instruments and recording test data, and greatly improving test efficiency; the test report provides a detailed analysis of the test results, which can meet all the indicators of passive antenna testing, and the file type of the test report can be selected as needed, which greatly increases the flexibility and convenience of data analysis; the antenna radiation pattern can vividly reflect the antenna direction in the far-field correction data.

[0117] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A passive automatic testing system based on a far-field environment, characterized in that, include: A rotating device (1) is provided, with the antenna to be tested (3) and a standard antenna (4) placed on its upper end. A transmitting antenna (2) is arranged opposite to the antenna under test (3). The transmitting antenna (2), the standard antenna (4), and the antenna under test (3) are all located in the far-field environment. The transmitting antenna (2) transmits pulse signals to the antenna under test (3) and the standard antenna (4). The antenna under test (3) generates a test feedback signal based on the pulse signal, and the standard antenna (4) generates a standard feedback signal based on the pulse signal. The signal receiving module (5) is connected to the antenna under test (3) and is used to obtain far-field test data based on the test feedback signal processing and to obtain standard test data based on the standard feedback signal processing. The environmental detection module (6) is used to detect in real time the ambient temperature in the far-field environment area, the first angular velocity and the first angular acceleration of the antenna under test (3) when it rotates on the rotating device (1), the second angular velocity and the second angular acceleration of the standard antenna (4) when it rotates on the rotating device (1), the first resistive thermal noise of the antenna under test (3) and the second resistive thermal noise of the standard antenna (4); The upper-level control module (7), connected to the signal receiving module (5) and the environment detection module (6) respectively, includes: The first calculation unit (71) is used to calculate the difference between the standard test data and the preset standard theoretical data to obtain the environmental signal deviation. The second calculation unit (72) is used to calculate the first dynamic hysteresis based on the first angular velocity and the first angular acceleration, and to calculate the second dynamic hysteresis based on the second angular velocity and the second angular acceleration; Formula establishment unit (73) is connected to the first calculation unit (71) and the second calculation unit (72) respectively, and is used to establish an environmental interference formula based on the ambient temperature, the second dynamic hysteresis, the second resistive thermal noise and the deviation of the environmental signal. The third calculation unit (74) is connected to the formula establishment unit (73) and is used to input the first dynamic hysteresis, the ambient temperature and the second resistance thermal noise into the environmental interference formula to obtain the test signal deviation. The correction unit (75) is connected to the third calculation unit (74) and is used to correct the far-field test data according to the test signal deviation to obtain far-field corrected data. The second calculation unit (72) substitutes the first angular velocity and the first angular acceleration into a preset dynamic lag calculation formula to obtain the first dynamic lag amount, and substitutes the second angular velocity and the second angular acceleration into the dynamic lag calculation formula to obtain the second dynamic lag amount; The dynamic lag calculation formula is configured as follows: ； in, Used to represent dynamic lag; Used to represent angular velocity; Used to represent angular acceleration; Used to represent a preset angular velocity constant; Used to represent a preset angular acceleration constant; The environmental interference formula is configured as follows: ； in, Used to indicate signal deviation; Used to indicate the ambient temperature; Used to represent resistive thermal noise; Used to represent a preset temperature constant; Used to represent the preset hysteresis constant; Used to represent a preset noise constant; Used to represent the average value of the temperature constant, the hysteresis constant, and the noise constant; The correction unit (75) inputs the test signal deviation and the far-field test data into a preset correction equation to obtain the far-field correction data; The correction equation is configured as follows: ； Wherein, used to represent The far-field correction data; Used to represent far-field test data; Used to indicate the preset correction factor; Used to represent the deviation of the test signal.

2. The passive automatic testing system based on far-field environment according to claim 1, characterized in that: The far-field test data includes antenna test power and antenna test gain, and the standard test data includes antenna standard power and antenna standard gain. The signal receiving module includes a gain calculation unit, which is used to input the antenna test power, the antenna standard power, and the antenna standard gain into a preset gain calculation formula to obtain the antenna test gain.

3. The passive automatic testing system based on far-field environment according to claim 2, characterized in that: The gain calculation formula is configured as follows: ； in, Used to indicate antenna test gain; Used to indicate the test power of the antenna; Used to indicate the standard power of the antenna; Used to indicate the standard gain of the antenna.

4. The passive automatic testing system based on far-field environment according to claim 1, characterized in that: The rotating device (1) has four axes, and the upper control module (7) further includes a rotation control unit (79). The rotation control unit (79) is used to configure the priority, scan start position, scan end position, scan step and rotation speed for each axis.

5. The passive automatic testing system based on far-field environment according to claim 1, characterized in that: The upper control module (7) further includes a parameter setting unit (76), which is used to set the start frequency and cutoff frequency of the standard antenna (4) and the antenna under test (3), or set the center frequency and scanning bandwidth, as well as set the number of scanning frequency points, transmission power and intermediate frequency bandwidth.

6. The passive automatic testing system based on far-field environment according to claim 1, characterized in that: The upper control module (7) further includes a scanning setting unit (77) for setting the travel mode and scanning method of the rotating device (1) and setting the polarization mode of the antenna under test (3).

7. The passive automatic testing system based on far-field environment according to claim 2, characterized in that: The upper control module (7) further includes an analysis and generation unit (78), which is connected to the correction unit (75) and is used to process the far-field correction data to obtain a test report and an antenna pattern.

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