Radiation characteristic test system of digital multi-beam antenna array plane and test method thereof

Abstract

The invention discloses a radiation characteristic test system and method for a digital multi-beam antenna array plane, and the method comprises the steps: carrying out the numbering and two-dimensional coordinate processing of array elements in a to-be-tested antenna array plane, and building the radiation characteristic test system for the digital multi-beam antenna array plane. Carrying out radiation characteristic test on the to-be-tested antenna array surface to obtain the amplitude and phase of each array element in the to-be-tested antenna array surface, and carrying out data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase in the array; and then calculating the gain value and the directional diagram of the antenna array plane to be tested according to the azimuth pitching pointing information, the calibration data and the data post-processing result of the different beams, so that the radiation characteristic test of the digital multi-beam antenna array plane can be realized without additionally adding a synthetic network test tool or multi-beam processing equipment, the test cost is reduced, and the test efficiency is improved. The test process is simplified, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of active digital multi-beam antenna testing, and in particular to a radiation characteristic testing system and a testing method of a digital multi-beam antenna array. Background Art

[0002] With the development of technology, active digital multi-beam antenna signal transceiver systems are widely used in digital mobile communications, aerospace measurement and control, satellite navigation and other fields. Active digital multi-beam antenna signal transceiver systems refer to systems that can generate two or more independently controllable beams, and each beam can be aimed at the target and independently complete signal transmission or reception for each target.

[0003] The measurement of active digital multi-beam antenna patterns is different from that of conventional passive antenna patterns. If the measurement method of conventional passive antenna patterns is used to measure active digital multi-beam antennas, only the pattern of a certain cut surface can be tested, and the three-dimensional pattern test cannot be completed, let alone the test of multiple beam patterns. In addition, compared with analog multi-beam antenna arrays, the ports of each antenna unit of the digital multi-beam antenna array are independent and external. The gain test of the digital multi-beam antenna array requires the processing of corresponding synthetic network test tooling and the test of the entire antenna array can only be completed when the synthetic network is available. As a result, the radiation characteristic test of the digital multi-beam antenna array requires a large number of test tooling, which is costly, complicated in test process and inefficient. Summary of the invention

[0004] The purpose of the present invention is to design a radiation characteristic testing method of a digital multi-beam antenna array in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The radiation characteristics test method of the digital multi-beam antenna array includes:

[0007] Numbering and two-dimensional coordinate processing of array elements in the antenna array to be tested;

[0008] Building a radiation characteristic test system for a digital multi-beam antenna array, and performing a radiation characteristic test on the antenna array to be tested;

[0009] Acquire the amplitude and phase of each array element in the antenna array plane to be tested, and perform data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase in the array;

[0010] The gain value and the directivity diagram of the antenna array to be tested are calculated according to the azimuth and elevation pointing information of different beams, calibration data and the post-processing results of the data.

[0011] The present invention further proposes a radiation characteristic test system for a digital multi-beam antenna array, wherein the radiation characteristic test system for a digital multi-beam antenna array is used to implement the above-mentioned radiation characteristic test method for a digital multi-beam antenna array, and the radiation characteristic test system for a digital multi-beam antenna array comprises:

[0012] A scanning frame, wherein a polarization turntable and a two-dimensional turntable are provided on the scanning frame, a source antenna is provided on the polarization turntable, and an antenna array to be measured is provided on the two-dimensional turntable;

[0013] A vector network analyzer, wherein a signal transmitting end of the vector network analyzer is connected to the source antenna, a signal receiving end of the vector network analyzer is connected to an array element in the array plane of the antenna to be tested, and the signal transmitting end of the vector network analyzer is used to transmit a test signal;

[0014] A main controller, wherein the control end of the main controller is connected to the two-dimensional turntable, and the main controller is used to control the two-dimensional turntable to rotate in the pitch plane to obtain the first amplitude data and the first phase data of the antenna array surface from the pitch angle of -90° to +90°, and control the two-dimensional turntable to change the azimuth profile to obtain the second amplitude data and the second phase data of the antenna array surface from the pitch angle of -90° to +90°, and calculate the gain value and the radiation pattern of the antenna array surface according to the calibration data and the first amplitude data, the first phase data, the second amplitude data and the second phase data.

[0015] The beneficial effects of the present invention are:

[0016] The radiation characteristic test method of a digital multi-beam antenna array surface firstly numbers and processes the array elements in the antenna array surface to be tested in two-dimensional coordinates, then builds a radiation characteristic test system of the digital multi-beam antenna array surface, performs radiation characteristic test on the antenna array surface to be tested, so as to obtain the amplitude and phase of each array element in the antenna array surface to be tested, and performs data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase pair in the array, and then calculates the gain value and radiation pattern of the antenna array surface to be tested according to the azimuth and elevation pointing information of different beams, calibration data and data post-processing results. The radiation characteristic test method of the digital multi-beam antenna array surface can realize the radiation characteristic test of the digital multi-beam antenna array surface without adding additional synthetic network test tooling or multi-beam processing equipment, thereby reducing the test cost, simplifying the test process and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic flow chart of a method for testing the radiation characteristics of a digital multi-beam antenna array of the present invention;

[0018] Figure 2 A spatial coordinate system for the radiation characteristics testing method of the digital multi-beam antenna array of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the radiation characteristics testing system of the digital multi-beam antenna array of the present invention;

[0020] Figure 4 A nine-beam antenna array radiation characteristic diagram of the radiation characteristic testing method of the digital multi-beam antenna array of the present invention;

[0021] In the figure: 1- scanning frame, 11- polarization turntable, 12- two-dimensional turntable, 2- source antenna, 3- standard antenna / antenna array to be tested, 4- vector network analyzer, 5- main controller. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-4 As shown, the radiation characteristic test method of the digital multi-beam antenna array includes:

[0030] Numbering and two-dimensional coordinate processing of array elements in the antenna array plane 3 to be measured;

[0031] Building a radiation characteristic test system for a digital multi-beam antenna array, and performing a radiation characteristic test on the antenna array 3 to be tested;

[0032] Acquire the amplitude and phase of each array element in the antenna array plane 3 to be tested, and perform data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase in the array;

[0033] The gain value and the radiation pattern of the antenna array surface 3 to be tested are calculated according to the azimuth and elevation pointing information of different beams, the calibration data and the post-processing results of the data.

[0034] The radiation characteristic testing method of the digital multi-beam antenna array surface of the present invention first numbers and processes the array elements in the antenna array surface 3 to be tested in two-dimensional coordinates, then builds a radiation characteristic testing system for the digital multi-beam antenna array surface, performs radiation characteristic testing on the antenna array surface 3 to be tested, so as to obtain the amplitude and phase of each array element in the antenna array surface 3 to be tested, and performs data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase pair in the array, and then calculates the gain value and the radiation pattern of the antenna array surface 3 to be tested according to the azimuth and elevation pointing information of different beams, calibration data and data post-processing results. The radiation characteristic testing method of the digital multi-beam antenna array surface can realize the radiation characteristic testing of the digital multi-beam antenna array surface without the need to add additional synthetic network test tooling or multi-beam processing equipment, thereby reducing the test cost, simplifying the test process, and improving the test efficiency.

[0035] In one embodiment, the steps of numbering and two-dimensionally processing the array elements of the antenna array surface 3 to be measured are specifically as follows:

[0036] Defining the spatial coordinate system of the antenna array 3 to be tested;

[0037] Determine the normal direction of the antenna array surface 3 to be tested, and number the array elements in the antenna array surface 3 to be tested;

[0038] Two-dimensional coordinate processing is performed according to the positions of the array elements in the antenna array plane 3 to be measured.

[0039] Furthermore, the step of performing two-dimensional coordinate processing according to the positions of the array elements in the antenna array plane 3 to be tested is specifically as follows:

[0040] The phase center of each array element in the antenna array 3 to be tested is projected into a two-dimensional Cartesian coordinate system, and the coordinate point [X i , Y i ].

[0041] In this embodiment, the spatial coordinate system of the antenna array surface 3 to be tested is first defined. Generally, the electromagnetic wave radiation direction is defined as the Z axis. The antenna array surface 3 to be tested is arranged on the XY plane, with the x-axis as the azimuth angle φ=0°, the y-axis as the azimuth angle φ=90°, and the z-axis as the elevation angle θ=0°. The normal direction of the antenna array surface 3 to be tested is determined, the M array elements in the antenna array surface 3 to be tested are numbered, and the phase center of each array element in the antenna array surface 3 to be tested is projected into the two-dimensional Cartesian coordinate system to calibrate the coordinate point [X i , Y i ] (i=1, 2, ...M), the spacing between array elements on the x-axis is set to d x , the spacing on the y-axis is set to d y , the coordinates are [X i , Y i ]The actual coordinate size of the ith element in this space is [d x *4, -d y *4], thereby realizing the numbering and two-dimensional coordinate processing of the array elements in the antenna array surface 3 to be measured.

[0042] In one embodiment, the steps of building a radiation characteristic test system for a digital multi-beam antenna array and performing a radiation characteristic test on the antenna array 3 to be tested are specifically as follows:

[0043] Setting up a radiation characteristic test system for the digital multi-beam antenna array;

[0044] Calibrate the radiation characteristic test system of the digital multi-beam antenna array using a standard antenna 2, and obtain the calibration data;

[0045] The standard antenna 2 is replaced with the antenna array face 3 to be tested, an azimuth profile is set, and a radiation characteristic test is performed on each array element in the antenna array face 3 to be tested.

[0046] Furthermore, the radiation characteristic test system of the digital multi-beam antenna array includes a two-dimensional turntable 12, and the step of obtaining the amplitude and phase of each array element in the antenna array 3 to be tested is specifically as follows:

[0047] Under the azimuth profile, collecting the amplitude and phase of the array element pitch angle rotating from -90° to +90°;

[0048] The two-dimensional turntable 12 is controlled to change the azimuth profile, and the amplitude and phase of the array element pitch angle rotating from -90° to +90° are collected.

[0049] The present embodiment adopts the antenna gain pattern test method to test the radiation characteristics of the digital multi-beam antenna array. The radiation characteristics test system of the digital multi-beam antenna array includes a vector network analyzer and a two-dimensional turntable 12. First, a standard antenna 2 is set on the two-dimensional turntable 12 to calibrate the radiation characteristics test system of the digital multi-beam antenna array to obtain calibration data; then the standard antenna 2 is replaced with the antenna array 3 to be tested, and the two-dimensional turntable 12 is controlled to rotate from -90° to +90° under the specified azimuth profile and working frequency using the vector network analyzer 4. The gain amplitude and phase of each array element in the antenna array are obtained by testing within the rotation angle range of the two-dimensional turntable 12. The phase needs to be coherent, that is, the phase of a specific array element (such as the array element at the center of the antenna array) is used as a reference, and the phases of the remaining array elements are relative values ​​with the phase of this array element as a reference. After the test is completed, the amplitude and phase data under the profile and working frequency band conditions are recorded as A i and P i (i=1, 2, ...M); traverse all the required azimuth profiles φ and working frequency points f to measure the amplitude two-dimensional matrix data and phase 2D matrix data .

[0050] In this embodiment, after the data acquisition is completed, the amplitude and phase of each array element, the excitation level of the array element and the rotation phase in the array are post-processed to obtain the channel data of each array element. , ,in is the excitation level of the unit itself (normalized by the maximum value), is the power amplitude value obtained by testing the array element, Phase data obtained for unit testing, The phase compensation value of the array element rotated to optimize the antenna array characteristics.

[0051] It can be understood that in this embodiment, the array elements are periodically rotated by 90°, 180° or 270° in order to optimize the axial ratio performance of the antenna array surface; the comprehensive results of all array elements are amplitude-weighted for the antenna array surface so that the excitation level of each array element is not equal, in order to optimize the sidelobe level of the antenna array surface, so as to be suitable for the test needs of digital multi-beam antenna arrays with complex requirements such as low sidelobe and dual circular polarization, and the requirements for the test site and test instruments are simple, and the test process is concise and efficient.

[0052] In one embodiment, the step of calculating the gain value and the radiation pattern of the antenna array surface 3 to be tested according to the azimuth and elevation pointing information of different beams, the calibration data and the data post-processing results is specifically as follows:

[0053] According to the azimuth and elevation pointing information of the different beams, the radiation characteristic calculation formula is synthesizing the different beams respectively to generate directional patterns of different beams of the antenna array;

[0054] Combined with the calibration data, the gain calculation formula Calculate the gain value of the antenna array.

[0055] In this embodiment, at the azimuth angle θ t , pitch angle φ t The radiation characteristics of the Tth beam generated by , where G t is the azimuth angle θ of the Tth beam of the antenna array t , pitch angle φ t The radiation characteristic pattern, is the coordinate of the ith element in the antenna array, c is the speed of light, which is 3×10 11 mm, f is the corresponding operating frequency, in GHz.

[0056] like Figure 4 , is the test result of the antenna array gain of the nine-beam antenna. According to the post-processing antenna array radiation characteristics G t , the signal level N obtained by testing the standard antenna 2 before 标 and the gain G of the standard antenna 2 itself 标 , according to the gain formula To calculate the gain value of the antenna array.

[0057] The present invention also proposes a radiation characteristics testing system for a digital multi-beam antenna array, which is used to implement the above-mentioned radiation characteristics testing method for the digital multi-beam antenna array; the specific method of the radiation characteristics testing method for the digital multi-beam antenna array refers to the above-mentioned embodiment. Since the radiation characteristics testing system for the digital multi-beam antenna array adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0058] In one embodiment, the radiation characteristics testing system of the digital multi-beam antenna array includes:

[0059] A scanning frame 1, wherein a polarization turntable 11 and a two-dimensional turntable 12 are provided on the scanning frame 1, a source antenna 2 is provided on the polarization turntable 11, and an antenna array surface 3 to be tested is provided on the two-dimensional turntable 12;

[0060] A vector network analyzer 4, wherein a signal transmitting end of the vector network analyzer 4 is connected to the source antenna 2, a signal receiving end of the vector network analyzer 4 is connected to an array element in the antenna array plane 3 to be tested, and the signal transmitting end of the vector network analyzer 4 is used to transmit a test signal;

[0061] A main controller 5, wherein the control end of the main controller 5 is connected to the two-dimensional turntable 12, and the main controller 5 is used to control the two-dimensional turntable 12 to rotate in the pitch plane to obtain the first amplitude data and the first phase data of the antenna array surface from the pitch angle of -90° to +90°, and control the two-dimensional turntable 12 to change the azimuth profile to obtain the second amplitude data and the second phase data of the antenna array surface from the pitch angle of -90° to +90°, and calculate the gain value and the radiation pattern of the antenna array surface according to the calibration data and the first amplitude data, the first phase data, the second amplitude data and the second phase data.

[0062] In one embodiment, the radiation characteristics testing system of the digital multi-beam antenna array includes:

[0063] A standard antenna 2 is arranged on the two-dimensional turntable 12;

[0064] The signal receiving end of the vector network analyzer 4 is connected to the standard antenna 2;

[0065] The main controller 5 is used to control the two-dimensional turntable 12 to rotate so that the normal of the standard antenna 2 is aligned with the source antenna 2, and to obtain the calibration data according to the signal received by the signal receiving end of the vector network analyzer 4.

[0066] In this embodiment, the signal transmitting end of the vector network analyzer 4 is connected to the source antenna 2 set up on the polarization turntable 11 of the scanning frame 1, and the signal receiving end of the vector network analyzer 4 is connected to the standard antenna 2 on the two-dimensional turntable 12. The gain of the standard antenna 2 at the corresponding working frequency is G 标 The signal transmitting end of the vector network analyzer 4 transmits a test signal with a power of W0 at the corresponding working frequency, and the main controller 5 controls the two-dimensional turntable 12 to align the maximum gain direction (usually normal) of the standard antenna 2 with the source antenna 2, and the signal level N received by the signal receiving end of the vector network analyzer 4 at this time 标 Record it, N. 标 That is, calibration data; replace the standard antenna 2 on the two-dimensional turntable 12 with the antenna array 3 to be tested, connect the first array element to the signal receiving end of the vector network analyzer 4, and the transmission power is also W0; the main controller 5 controls the two-dimensional turntable 12 to rotate in the pitch plane, and records the amplitude data and phase data of the array element from the pitch angle of -90° to +90°; the main controller 5 controls the two-dimensional turntable 12 to change the azimuth profile, and continues to record the amplitude data and phase data of the array element from the pitch angle of -90° to +90°. After completing the data collection of the required azimuth profile, the amplitude two-dimensional matrix data of the first array element about the pitch azimuth angle can be obtained. and phase 2D matrix data ; Replace another array element and repeat the test steps to measure all amplitude two-dimensional matrix data of the i-th array element and phase 2D matrix data , until all array elements in the antenna array are tested.

[0067] The radiation characteristic test method of the digital multi-beam antenna array of the present invention does not require additional synthetic network test tooling or multi-beam processing equipment, fully considers factors such as the rotation of the array element and the excitation level, combines the array element radiation field amplitude and phase conditions obtained by the test with the array element coordinates and phase information of the antenna array surface, thereby synthesizing the beam radiation characteristics of the antenna array surface in multiple different directions; that is, it is only necessary to compile the array element number and the position coordinates in the antenna array in advance, adopt the gain test method to obtain the amplitude and phase of the array element in different azimuth profiles, and post-process the data to quickly and accurately obtain the multi-beam antenna array surface radiation pattern performance of the digital multi-beam antenna array in different directions, with a small amount of data processing, less test tooling requirements, and easy engineering implementation; considering the amplitude weighting and array element rotation of the array element, it can be applicable to the test requirements of the digital multi-beam antenna array with complex requirements such as low side lobes and dual circular polarization, with simple requirements for the test site and test instruments, and a concise and efficient test process.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for testing the radiation characteristics of a digital multi-beam antenna array, applied to a radiation characteristics testing system for a digital multi-beam antenna array, characterized in that: The radiation characteristics testing method of the digital multi-beam antenna array comprises the following steps: Numbering and two-dimensional coordinate processing of array elements in the antenna array to be tested; Building a radiation characteristic test system for a digital multi-beam antenna array, and performing a radiation characteristic test on the antenna array to be tested; Acquire the amplitude and phase of each array element in the antenna array plane to be tested, and perform data post-processing on the amplitude and phase of each array element, the excitation level of the array element and the rotation phase in the array; The gain value and the directivity diagram of the antenna array to be tested are calculated according to the azimuth and elevation pointing information of different beams, calibration data and the post-processing results of the data.

2. The method for testing the radiation characteristics of a digital multi-beam antenna array according to claim 1, characterized in that: The steps of numbering and two-dimensional coordinate processing of the array elements of the antenna array to be measured are specifically as follows: Defining a spatial coordinate system for the antenna array to be tested; Determine the normal direction of the antenna array to be tested, and number the array elements in the antenna array to be tested; Two-dimensional coordinate processing is performed according to the positions of array elements in the antenna array plane to be measured.

3. The method for testing the radiation characteristics of a digital multi-beam antenna array according to claim 2, characterized in that: The step of performing two-dimensional coordinate processing according to the position of the array element in the antenna array plane to be measured is specifically: The phase center of each array element in the antenna array to be tested is projected into a two-dimensional Cartesian coordinate system, and the coordinate point [X i , Y i ].

4. The method for testing the radiation characteristics of a digital multi-beam antenna array according to claim 1, characterized in that: The steps of building a radiation characteristic test system for a digital multi-beam antenna array and performing a radiation characteristic test on the antenna array to be tested are specifically as follows: Setting up a radiation characteristic test system for the digital multi-beam antenna array; Calibrate the radiation characteristic test system of the digital multi-beam antenna array using a standard antenna, and obtain the calibration data; The standard antenna is replaced with the antenna array to be tested, an azimuth profile is set, and a radiation characteristic test is performed on each array element in the antenna array to be tested.

5. The method for testing the radiation characteristics of a digital multi-beam antenna array according to claim 4, characterized in that: The radiation characteristic test system of the digital multi-beam antenna array includes a two-dimensional turntable, and the step of obtaining the amplitude and phase of each array element in the antenna array to be tested is specifically as follows: Under the azimuth profile, collecting the amplitude and phase of the array element pitch angle rotating from -90° to +90°; The two-dimensional turntable is controlled to change the azimuth profile, and the amplitude and phase of the array element pitch angle rotating from -90° to +90° are collected.

6. The method for testing the radiation characteristics of a digital multi-beam antenna array according to claim 4, characterized in that: The step of calculating the gain value and the radiation pattern of the antenna array to be tested according to the azimuth and elevation pointing information of different beams, the calibration data and the data post-processing results is specifically as follows: According to the azimuth and elevation pointing information of the different beams, the radiation characteristic calculation formula is synthesizing the different beams respectively to generate directional patterns of different beams of the antenna array; Combined with the calibration data, the gain calculation formula Calculate the gain value of the antenna array.

7. A radiation characteristics test system for a digital multi-beam antenna array, characterized in that: The radiation characteristic test system of the digital multi-beam antenna array is used to implement the radiation characteristic test method of the digital multi-beam antenna array according to any one of claims 1 to 6, and the radiation characteristic test system of the digital multi-beam antenna array comprises: A scanning frame, wherein a polarization turntable and a two-dimensional turntable are provided on the scanning frame, a source antenna is provided on the polarization turntable, and an antenna array to be measured is provided on the two-dimensional turntable; A vector network analyzer, wherein a signal transmitting end of the vector network analyzer is connected to the source antenna, a signal receiving end of the vector network analyzer is connected to an array element in the array plane of the antenna to be tested, and the signal transmitting end of the vector network analyzer is used to transmit a test signal; A main controller, wherein the control end of the main controller is connected to the two-dimensional turntable, and the main controller is used to control the two-dimensional turntable to rotate in the pitch plane to obtain the first amplitude data and the first phase data of the antenna array surface from the pitch angle of -90° to +90°, and control the two-dimensional turntable to change the azimuth profile to obtain the second amplitude data and the second phase data of the antenna array surface from the pitch angle of -90° to +90°, and calculate the gain value and the radiation pattern of the antenna array surface according to the calibration data and the first amplitude data, the first phase data, the second amplitude data and the second phase data.

8. The radiation characteristic test system of the digital multi-beam antenna array according to claim 7, characterized in that: The radiation characteristics test system of the digital multi-beam antenna array comprises: Setting a standard antenna on the two-dimensional turntable; The signal receiving end of the vector network analyzer is connected to the standard antenna; The main controller is used to control the rotation of the two-dimensional turntable to align the normal of the standard antenna with the source antenna, and to obtain the calibration data according to the signal received by the signal receiving end of the vector network analyzer.

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