An Optimization Method of Sparse Planar Antenna Array for Mobile Satellite Communication
A mobile satellite communication and planar antenna technology, applied in the field of mobile satellite communication, can solve the problems of low optimization efficiency of evolutionary optimization algorithm and difficulty in obtaining practical results, etc., and achieve the goal of reducing the number of array elements, improving optimization efficiency, and reducing costs Effect
Active Publication Date: 2019-10-15
ROCKET FORCE UNIV OF ENG
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However, such algorithms will generate a large number of infeasible solutions, making the optimization efficiency of the evolutionary optimization algorithm very low, and it is difficult to obtain practical results.
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[0062] In this embodiment, considering a two-dimensional rectangular array with a size of 4.5λ×4.5λ, the minimum spacing d of the array elements is set T =0.5λ, the maximum number of array elements that can be distributed is 10×10, and the number of sparse array elements is N y ×N x =9×9, the vector mapping method is combined with the differential evolution algorithm.
[0063] The optimal array element distribution of the optimization result is as follows: Figure 4 As shown, "●" indicates that the position needs to be equipped with array elements after optimization. The optimized rectangular sparse planar array has only 60 array elements, and the peak side lobe is -19.99dB; while the uniform planar array requires 100 array elements. The peak side lobe is -12.96dB, the number of elements in the optimized sparse planar array is reduced by 40%, and the peak side lobe of the antenna is significantly reduced, as shown in Figure 5 The optimized sparse planar array antenna patte...
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The invention discloses a mobile satellite communication thin cloth plane antenna array optimization method, and the method comprises the steps of establishing an optimization mathematics model of the thin cloth plane antenna array; generating a Ny*Nx dimension array elements selection matrix I and an array elements coordinate matrix X1 and Y1 according to the geometric size of the thin cloth plane antenna array and the antenna operating wavelength Lambda; constructing a vector mapping function T and performing mapping processing to the array elements coordinate matrix X1 and the array elements coordinate matrix Y1 according to the vector mapping function T; putting the array elements selection matrix I and the mapped array elements coordinate matrix X and Y into the optimization mathematics model of the thin cloth plane antenna array, and calculating a peak value sidelobe level PSLL of the thin cloth plane antenna array in a work scope; and obtaining the position of each array element, an array elements quantity Nx in x shaft direction, and an array elements quantity Ny in the y shaft direction in an optimal thin cloth plane antenna array. According to the method, the peak value sidelobe level of the thin cloth plane antenna array is the lowest.
Description
technical field [0001] The invention belongs to the technical field of mobile satellite communication, and relates to a method for optimizing a sparsely distributed planar antenna array for mobile satellite communication. Background technique [0002] An array antenna is an antenna system composed of multiple identical small antenna elements arranged according to certain rules. The common flat panel array antennas include phased array antennas, single-plate array antennas, and multi-plate array antennas. [0003] Phased array antennas have been widely used in radar, sonar and other fields since their inception. It is an antenna system that forms beams and drives them to point to targets by controlling the phase and amplitude of each array element. However, the beam scanning range of a general phased array antenna is the airspace where the angle between the array normal and the angle is less than 60°. If the scanning elevation angle is lower, the beam will be distorted, and t...
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IPC IPC(8): G06F17/50H01Q21/00
CPCG06F30/00H01Q21/00
Inventor 贾维敏张峰干金伟侯榜焕陈富周淑华
Owner ROCKET FORCE UNIV OF ENG