远场反推变形反射面天线馈源调整量

doi:10.3969/j.issn.1001-2400.2014.05.018

Abstract

Abstract:

Reflector surface deformation can be compensated by adjusting the feed position. Aiming at the shortcoming of the traditional method that the best-fit paraboloid(BFP) needs to get the accurate reflector deformation beforehand, a method for the determination of the feed adjustment quantity from a far field is presented in this paper. Based on the aperture field method, explicit expressions for the sensitiveness of a far field to best-fit parameters of the distorted reflector are established. Then the best-fit parameters and the far field are linked with an over-determined linear system of equations, and by measuring the far electric field, the reflector deformation can be approximately calculated by the singular value decomposition method, providing guidance for feed adjustment. There is no need to know the reflector distortion in advance in the proposed method. Simulation cases show the correctness of the proposed method and the validity of the compensation for reflector distortion.

Key words: reflector antenna, far field pattern, inversion model, feed adjustment

CLC Number:

TN823+.27

LIAN Peiyuan;DUAN Baoyan;WANG Wei;HU Naigang. Inverse derivation of the adjustment quantity of the distorted reflector antenna feed from a far field[J].J4, 2014, 41(5): 105-111.

References

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[1]	WANG Meng;DUAN Baoyan;WANG Wei. Effect of surface errors on the average power pattern of reflector antennas [J]. J4, 2014, 41(6): 188-194.
[2]	WANG Wei;LI Peng;SONG Li-wei. Mechanism of the influence of the panel positional error on the power pattern of large reflector antennas [J]. J4, 2009, 36(4): 708-713.
[3]	LI Peng;ZHENG Fei;JI Xiang. Electromechanical coupled analysis of large broad band reflector antennas [J]. J4, 2009, 36(3): 473-479.
[4]	WANG Cong-si;DUAN Bao-yan;QIU Yuan-ying. A novel method for fitting the distorted reflector of a large antenna [J]. J4, 2005, 32(6): 839-843.
[5]	LIU Shao-dong;JIAO Yong-chang;ZHANG Fu-shun. Effects of random surface errors on radiation characteristics of the side-fed offset cassegrain antenna [J]. J4, 2005, 32(6): 865-868.
[6]	LIU Xu-feng;LIU Shao-dong;ZHANG Fu-shun;JIAO Yong-chang. Pattern analysis of dual-reflector antennas under wide-angle scanning [J]. J4, 2005, 32(1): 80-83.

Inverse derivation of the adjustment quantity of the distorted reflector antenna feed from a far field

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