大型介质夹层天线罩的电性能补偿方法

doi:10.3969/j.issn.1001-2400.2013.06.014

J4 ›› 2013, Vol. 40 ›› Issue (6): 78-84.doi: 10.3969/j.issn.1001-2400.2013.06.014

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Compensation method for the effect of large dielectric sandwich radomes on electrical performance

LI Peng¹;XU Wanye¹;QIU Yuanying¹;LI Huaping²

(1. Ministry of Education Key Lab. of Electronic Equipment Structure, Xidian Univ., Xi'an 710071， China;
2. PLA Air Force Xi'an Flight Academy, Xi'an 710306， China)

Received:2012-12-10 Online:2013-12-20 Published:2014-01-10
Contact: LI Peng E-mail:yinhong0523@163.com

Abstract

Abstract:

For the problem that the dielectric sandwich radome will affect the electrical performance of the enclosed antenna, the main factors of the effect have been studied, and it is found that the main reason for the distortion of the far field pattern is the change of phase in the aperture due to radome. The relation between phase change and radome's structure has been analyzed. Then considering the structural features of reflector antenna, some compensated schemes for electrical performance have been proposed. One is the modification of the main reflector, the other is to adjust the axial offset focus of the feed. The second scheme is discussed because it can be more appropriately applied in engineering practice. A formula for the offset focus value has been proposed, and so has the restriction of application. Some simulations have been done by a 9.14m dielectric sandwich radome of satellite earth station. The result shows that the compensated method of the axial offset focus is very effective, especially for the distortion of the far field pattern.

Key words: radome, dielectric sandwich, axial offset focus, phase compensation, electrical performance

CLC Number:

TN957

LI Peng;XU Wanye;QIU Yuanying;LI Huaping. Compensation method for the effect of large dielectric sandwich radomes on electrical performance[J].J4, 2013, 40(6): 78-84.

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Compensation method for the effect of large dielectric sandwich radomes on electrical performance

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