A method for regulating effective radiated power based on beam control

Abstract

The application discloses an effective radiation power regulation method based on beam control and belongs to the technical field of electromagnetic environment construction, which comprises the following steps: based on the two-dimensional antenna directional diagram test data of a phased array radiation source, scene parameters are constructed according to a complex electromagnetic environment, and the average gain of an antenna corresponding to a test area under different beam deviation angles is calculated; based on the beam pointing accuracy of the radiation source, the average gain error peak value of the antenna corresponding to different beam deviation angles is calculated, and an optimal gain-beam deviation angle corresponding table is constructed with the minimum average gain error peak value of the antenna as the target; and the beam pointing is set based on the gain-beam deviation angle corresponding table, so that the dynamic control of the effective radiation power in a specified direction is realized, and a complex electromagnetic environment with a dynamically changing amplitude is simulated equivalently in a specified area. Through the application, the dynamic control of the effective radiation power in a specified direction can be realized, and a complex electromagnetic environment with a dynamically changing amplitude can be simulated equivalently at a frequency device under test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electromagnetic environment construction, and more particularly relates to an effective radiated power regulation method based on beam control. BACKGROUND

[0002] Complex electromagnetic environment construction is the basis for complex electromagnetic environment adaptability test of frequency devices, and accurately simulating signal waveform and amplitude variation of complex electromagnetic environment at the tested frequency device is the key of complex electromagnetic environment construction. Large phased array radiators such as radars and jammers usually do not have amplitude continuous adjustment function, and it is difficult to equivalently simulate signal amplitude variation caused by interference distance variation and interference beam scanning when large phased array radiators are used to construct complex electromagnetic environment. SUMMARY

[0003] In view of the above defects or improvement needs of the prior art, the present application provides an effective radiated power regulation method based on beam control, which realizes dynamic control of effective radiated power in a specified direction, solves the problem that large phased array radiators such as radars and jammers are difficult to equivalently simulate signal amplitude variation when constructing complex electromagnetic environment, and can equivalently simulate complex electromagnetic environment with dynamic amplitude variation at the tested frequency device.

[0004] To achieve the above-mentioned purpose, the present application provides an effective radiated power regulation method based on beam control, which comprises:

[0005] Based on two-dimensional antenna pattern test data of the phased array radiator, the antenna average gain corresponding to the test area under different beam deviation angles is calculated according to the complex electromagnetic environment construction scene parameters;

[0006] Based on the beam pointing accuracy of the radiator, the antenna average gain error peak value corresponding to different beam deviation angles is calculated, and an optimal gain-beam deviation angle corresponding table is constructed with the minimum antenna average gain error peak value as the target;

[0007] Based on the gain-beam deviation angle corresponding table, the beam pointing is set to realize dynamic control of effective radiated power in a specified direction, and to equivalently simulate complex electromagnetic environment with dynamic amplitude variation in a specified area.

[0008] In some optional embodiments, the effective radiated power regulation method based on beam control comprises: The antenna average gain G(θ,φ) corresponding to the test area under different beam deviation angles (θ,φ) is obtained, wherein θ is the azimuth deviation angle of the center of the phased array antenna beam relative to the normal of the array surface, φ is the elevation deviation angle of the center of the phased array antenna beam relative to the normal of the array surface, and ω represents the azimuth angle of the phased array antenna, Let θ represent the elevation angle of the phased array antenna, α represent the azimuth coverage area of ​​the phased array antenna in the test area, β represent the elevation coverage area of ​​the phased array antenna in the test area, and F(θ,φ) represent the test data of the two-dimensional antenna pattern of the phased array radiation source.

[0009] In some alternative implementations, by The peak value of the average gain error of the antenna ΔG(θ,φ) in the test area under different beam deviation angles (θ,φ) was obtained, where Δθ is the azimuth beam pointing accuracy of the phased array antenna and Δφ is the elevation beam pointing accuracy of the phased array antenna.

[0010] In some alternative implementations, constructing the optimal gain-beam offset angle correspondence table with the objective of minimizing the peak value of the antenna average gain error includes:

[0011] The dynamic range of radiated power adjustment, G, is determined based on actual needs and antenna pattern distribution characteristics. DR and regulation step G δ By adjusting the dynamic range and the adjustment step, a set of target gains {0, -G} is determined. δ -2G δ ,...,-G DR};

[0012] For the i-th target gain -(i-1)G δ Based on the distribution of the antenna average gain G(θ,φ) under different beam deviation angles (θ,φ), select the antenna that satisfies |G(θ,φ)+(i-1)G δ |<G δ / 2 condition and the beam deviation angle θ that minimizes the peak value of the antenna average gain error ΔG(θ,φ) i ,φ i Thus, the average antenna gain G(θ) corresponding to the i-th target gain is obtained. i ,φ i ), azimuth deviation angle θ i Pitch deviation angle φ i , error peak value ΔG(θ) i ,φ i );

[0013] Iterate through all target gains to form a gain-beam offset angle correspondence table.

[0014] In some optional implementations, the step of setting the beam direction based on the gain-beam offset angle correspondence table to achieve dynamic control of the effective radiated power in a specified direction, and to equivalently simulate a complex electromagnetic environment with dynamically changing amplitude in a specified area, includes:

[0015] In the electromagnetic environment construction, the large phased array radiation source array is aligned to the test area, and when the radiation power needs to be regulated, the phased array antenna beam pointing is set according to the corresponding beam deviation angle of the gain-beam deviation angle corresponding table.

[0016] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0017] (1) The present application proposes an effective radiation power regulation method based on beam control, based on the complex electromagnetic environment construction of the phased array radiation source, using the characteristics of the main lobe sidelobe gain change of the antenna pattern and the jumpable phased array antenna beam pointing, through the continuous control of the phased array beam pointing, the dynamic control of the specified direction effective radiation power is realized, which can realize the equivalent simulation of the complex electromagnetic environment with dynamic amplitude change at the tested frequency device.

[0018] (2) The present application proposes an effective radiation power regulation method based on beam control, forming an equivalent construction method of amplitude dynamic change complex electromagnetic environment for phased array radiation source, solving the problem that large phased array radiation sources such as radars and jammers are difficult to simulate signal amplitude change in complex electromagnetic environment construction. The principle of the present application is simple and clear, and has strong engineering practicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a flowchart of an effective radiation power regulation method based on beam control provided by an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of a two-dimensional directional diagram of a phased array antenna, wherein (a) is a three-dimensional diagram and (b) is a plan view;

[0021] Figure 3 is a schematic diagram of antenna average gain under different beam deviation angles provided by an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of antenna average gain error peak value under different beam deviation angles provided by an embodiment of the present application;

[0023] Figure 5 is a comparison schematic diagram of antenna average gain error peak value under different beam pointing precisions provided by an embodiment of the present application;

[0024] Figure 6 is a comparison schematic diagram of error peak value under different beam pointing precisions provided by an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of equivalent construction result of amplitude dynamic change electromagnetic environment provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] The present application is aimed at constructing a scene for a complex electromagnetic environment, and is intended to realize dynamic regulation of effective radiated power in a specified direction through beam pointing control of a phased array radiating source, so as to simulate a complex electromagnetic environment with dynamic amplitude variation in a specified test area.

[0028] As shown in Figure 1 , it specifically includes the following steps:

[0029] Step S1: For a large phased array radiating source, the array surface is aligned with the test antenna, the phased array beam two-dimensional scanning is set, and the phased array antenna azimuth and elevation two-dimensional pattern F(θ, φ) is tested;

[0030] The typical test results are shown in Figure 2 , wherein (a) is a three-dimensional graph, and (b) is a plan view.

[0031] Step S2: For a specific test scene of electromagnetic environment construction, according to the test distance and test area parameters in the electromagnetic environment construction scene, the azimuth angle coverage range α and the elevation angle coverage range β of the phased array antenna corresponding to the test area can be calculated, and the two-dimensional pattern F(θ, φ) obtained by testing can be used to calculate the average gain G(θ, φ) of the antenna under different beam deviation angles (θ, φ) in the test area:

[0032]

[0033] Wherein, θ is the azimuth deviation angle of the center of the phased array antenna beam relative to the normal of the array surface, φ is the elevation deviation angle of the center of the phased array antenna beam relative to the normal of the array surface, ω represents the azimuth angle of the phased array antenna, represents the elevation angle of the phased array antenna.

[0034] Taking a test distance of 200 meters and a test area of 4 meters*4 meters as an example, the azimuth angle coverage range 1.15° and the elevation angle coverage range 1.15° corresponding to the test area, the results are shown in Figure 3 .

[0035] Step S3: Since there may be errors in the pointing of the phased array antenna beam, errors in the radiated power control are caused;

[0036] Assuming that the azimuth beam pointing accuracy is Δθ, the elevation beam pointing accuracy is Δφ, and based on the average antenna gain G(θ, φ) of the test area under different beam deviation angles, the average antenna gain error peak ΔG(θ, φ) of the test area under different beam deviation angles (θ, φ) can be calculated:

[0037]

[0038] Assuming that the beam pointing accuracy Δθ = Δφ = 0.1°, the average antenna gain error peak under different beam deviation angles (azimuth, elevation) is as shown in Table 2. Figure 4 When the beam pointing accuracy is 0.1°, 0.2°, 0.5°, and 1° respectively, the comparison results of the average antenna gain error peak under different beam deviation angles (azimuth) are as shown in Table 3. Figure 5 When the slope of the average gain with respect to the beam deviation angle is greater, the error peak caused by the beam pointing is greater.

[0039] Step S4: Construct an optimal gain-beam deviation angle correspondence table based on the principle of minimizing the antenna average gain error peak;

[0040] According to the actual demand and the antenna pattern distribution characteristics, determine the radiation power regulation dynamic range G DR and the regulation step G δ . Based on the regulation dynamic range and the regulation step, a set of target gains {0, -G δ , -2G δ ,..., -G DR} can be determined. For the i-th target gain -(i-1)G δ , according to the antenna average gain G(θ, φ) distribution under different beam deviation angles (azimuth, elevation), select the beam deviation angle θ δ , φ δ that satisfies the condition |G(θ, φ) + (i-1)G i | < G i / 2 and has the minimum antenna average gain error peak ΔG(θ, φ). Thus, the antenna average gain G(θ i , φ i ), the azimuth deviation angle θ i , the elevation deviation angle φ i , and the error peak ΔG(θ i , φ i ) corresponding to the i-th target gain are obtained. By traversing the entire set of target gains, a gain-beam deviation angle correspondence table is formed.

[0041] Under the condition that the beam pointing accuracy is 0.1 degree, the gain-beam deviation angle correspondence table is shown in Table 1. In the example, the power regulation dynamic range is selected as 80 dB, and the regulation step is 2 dB.

[0042] When the beam pointing accuracy is 0.1°, 0.2°, 0.5°, and 1° respectively, the gain-beam deviation angle corresponding table is constructed respectively, and the error peak value comparison chart of different antenna average power is as shown in Figure 6 It can be seen from the results that when the beam pointing accuracy is higher, the error peak value is smaller, and the electromagnetic environment construction accuracy is higher. For example, when the phased array antenna beam pointing accuracy is better than 0.2°, the error peak value caused by beam pointing can be controlled within 3dB. The phased array antenna beam pointing accuracy is determined by the array element amplitude accuracy, array element phase accuracy, array element installation accuracy, etc. The phased array antenna beam pointing accuracy can reach 0.1 degree, and the present application has wide practical value.

[0043] Table 1 Gain-beam deviation angle corresponding table (beam pointing accuracy 0.1 degree)

[0044]

[0045]

[0046] Step S5: In the electromagnetic environment construction, the large phased array radiation source array is aligned to the test area. When the radiation power needs to be controlled, the phased array antenna beam pointing is set according to the corresponding beam deviation angle of the gain-beam deviation angle corresponding table.

[0047] Taking the beam pointing accuracy of 0.1 degree as an example, the electromagnetic environment is constructed in the scene of linear attenuation of dB amplitude, and the results are as shown in Figure 7 The root mean square error of electromagnetic environment construction is 0.7dB, and the maximum error is 1.6dB.

[0048] It should be pointed out that according to the needs of implementation, each step / component described in the present application can be split into more steps / components, or two or more steps / components or part of the operation of the steps / components can be combined into a new step / component, so as to realize the purpose of the present application.

[0049] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An effective radiated power regulation method based on beam control, characterized in that, include: Based on the test data of the two-dimensional antenna radiation pattern of the phased array radiation source, scenario parameters were constructed according to the complex electromagnetic environment, and the average antenna gain of the test area under different beam deviation angles was calculated. Different beam deviation angles were obtained The average antenna gain corresponding to the lower test area ,in, The azimuth deviation angle of the phased array antenna beam center relative to the array surface normal. The pitch deviation angle of the phased array antenna beam center relative to the array surface normal. This indicates the azimuth angle of the phased array antenna. Indicates the elevation angle of the phased array antenna. This represents the azimuth coverage area of ​​the phased array antenna in the test area. This represents the coverage area of ​​the phased array antenna at the corresponding elevation angle in the test area. This is test data for the radiation pattern of a two-dimensional antenna of a phased array radiation source. Based on the beam pointing accuracy of the radiation source, the peak value of the antenna's average gain error corresponding to different beam deviation angles is calculated. With the goal of minimizing the peak value of the antenna's average gain error, an optimal gain-beam deviation angle correspondence table is constructed. The test area was obtained at different beam deviation angles. Peak value of average gain error of antenna ,in, To improve the azimuth beam pointing accuracy of the phased array antenna. To improve the pitch beam pointing accuracy of the phased array antenna; The beam pointing is set based on the gain-beam deviation angle correspondence table to achieve dynamic control of the effective radiated power in a specified direction, and to equivalently simulate a complex electromagnetic environment with dynamic amplitude changes in a specified area. The objective of minimizing the peak value of the antenna's average gain error is to construct an optimal gain-beam offset angle correspondence table, including: The dynamic range of radiated power control is determined based on actual needs and antenna pattern distribution characteristics. and regulatory steps A set of target gains is determined by regulating the dynamic range and the regulation step. ; Regarding the first i Target gain According to different beam deviation angles Antenna average gain Distribution, select those that satisfy Conditions and peak value of antenna average gain error Minimum beam deviation angle Thus obtaining the first i The average antenna gain corresponding to the target gain Azimuth deviation angle Pitch deviation angle Error peak ; Iterate through all target gains to form a gain-beam offset angle correspondence table.

2. The method according to claim 1, characterized in that, The beam pointing is set based on the gain-beam offset angle correspondence table to achieve dynamic control of the effective radiated power in a specified direction, and to equivalently simulate a complex electromagnetic environment with dynamically changing amplitude in a specified area, including: When constructing the electromagnetic environment, align the large phased array radiation source array with the test area. When it is necessary to adjust the radiation power, set the phased array antenna beam pointing according to the beam offset angle corresponding to the gain-beam offset angle correspondence table.

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