Optimal Design Method of Umbrella Antenna Structure Parameters Based on Best Matching Parameters

Abstract

The invention discloses an umbrella-shaped antenna structure parameter optimization design method based on optimal consistence parameters. The method specifically comprises the following steps: inputting structure parameters and electronic parameters of an umbrella-shaped antenna; calculating segment numbers of antenna ribs; calculating coordinates of points on the ribs; calculating coordinates of points of adjacent ribs; generating all node coordinates of the umbrella-shaped antenna; calculating a node optical path difference direct-ratio vector; calculating a node consistence geometric matrix; calculating a weighting matrix; calculating an optimal consistence parameter column vector; outputting axial precision of the umbrella-shaped antenna; judging whether the axial precision meets requirements or not; outputting the structure parameters of the umbrella-shaped antenna; and updating the structure parameters of the umbrella-shaped antenna. By adopting the umbrella-shaped antenna structure parameter optimization design method, the characteristic that the umbrella-shaped antenna is assembled through surface-piece splicing manner is taken into account, the axial precision of the umbrella-shaped antenna is analyzed based on the concept of an optima consistence paraboloid, the electronic parameters of the antenna are introduced into calculation of the axial precision, and thus the axial precision of the umbrella-shaped antenna is obtained through the optimal consistence parameters; and by adopting the method, mechanical structure design and mechanical-electric integration optimization design of umbrella-shaped antennas can be instructed.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to an umbrella-shaped antenna structural parameter optimization design method based on optimal matching parameters in the field of radar antennas. Background technique [0002] Umbrella antenna composed of antenna ribs, metal reflective wire mesh, tension cable net, etc. is a kind of spaceborne antenna structure. Due to its advantages of simple structure, light weight, and low cost, umbrella antennas have broad application prospects in aerospace applications. Since the umbrella antenna uses a flexible wire mesh to form the antenna reflection surface, it inevitably introduces patch stitching errors, that is, the principle error in the conceptual design stage of the umbrella antenna. Although the existing literature has calculated and evaluated the principle error of the umbrella antenna, they all start from the field of single-disciplinary structure, without considering the a...

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Problems solved by technology

Wang Congsi et al. and Leng Guojun et al. in the papers "Precise Calculation Method of Antenna Surface Error and Electrical Performance Analysis" (Journal of Radio Science, 2006, Vol. The precise calculation method for the surface error of the ground-based circular parabolic antenna was proposed in "Acta Radio Science, Vol. 24, No. 5, 2009, 826-831). However, these methods cannot be directly applied to surface It is difficult to directly obtain the principle error of the umbrella antenna on the umbrella antenna that is spliced ​​together, and the method needs to be modified and improved.

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