Auxiliary face compensation method for large beam-forming double-reflection-face antenna based on electromechanical coupling

Abstract

The invention discloses an auxiliary face compensation method for a large beam-forming double-reflection-face antenna based on electromechanical coupling. The method includes the steps that firstly, an antenna finite element model is established; secondly, a piecewise fitting face of an antenna beam-forming main reflection face is acquired; thirdly, according to loaded temperature loads, node coordinates of the deformed antenna main reflection face are calculated; fourthly, the electrical property of the deformed antenna is calculated; fifthly, the optical matching face of the deformed antenna main reflection face is acquired; sixthly, a focal point is taken from a focal axis corresponding to the optimal matching face, and the position of the focal point corresponding to the optical matching face serves as an optimal feed source position by calculating the electrical property of the antenna; seventhly, the auxiliary reflection face position adjusting amount for compensating for the electrical property of the antenna is calculated, and the electrical property of the antenna after compensation is calculated; eighthly, whether the increase amount before and after the auxiliary face position is adjusted meets requirements or not is judged, and the auxiliary face position is adjusted till the requirements are met. The reflection face antenna quantitative analysis and modeling processes are simplified, the calculation process is improved, and the weight and the manufacturing cost of the antenna are reduced.

Description

technical field [0001] The invention belongs to the technical field of antennas, and specifically relates to a secondary surface compensation method of a large-scale shaped double-reflector antenna based on electromechanical coupling, which is used to adjust the position of the secondary reflector of the shaped double-reflector antenna to optimize the electrical performance of the antenna . Background technique [0002] Large antennas play an extremely important role in major projects such as deep space exploration and missile defense systems. As the boundary condition of electromagnetic wave propagation, the reflective panel directly affects the electrical performance of the antenna. Under the action of gravity load, temperature load and wind load, etc., the antenna will undergo structural deformation, which will cause the reflective surface to deviate from the shape required by the electrical design, thereby seriously affecting the electrical performance of the antenna. ...

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Problems solved by technology

[0005] Aiming at the deficiencies of the previous compensation methods, the present invention provides a compensation method for the subsurface of a large shaped double reflector antenna based on electromechanical coupling. This method mainly solves the electrical performance of the large shaped double reflector antenna caused by thermal deformation. To solve the drop problem, improve the electrical performance of the antenna by adjusting the position and orientation of the secondary surface

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