A Multimode Feed for Compact Offset Parabolic Reflector Antenna System

被引：0
|
作者：
Makwana, Balvant J. [1 ]
Sharma, S. B. [2 ]
Parikh, Kush [2 ]
机构：
[1] Govt Engn Coll, EC Dept, Rajkot, Gujarat, India
[2] Indus Univ, Ahmadabad, Gujarat, India
来源：
2016 IEEE INDIAN ANTENNA WEEK (IAW 2016) | 2016年
关键词：
corrugated horn; crosspolarizaton; compact offset reflector antenna; multimode horn;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper the design of a multimode corrugated feed at centre frequency of 7.25 GHz is presented, which reduces very high level of cross polarization in an offset parabolic reflector antenna system. The higher order modes TE21 and TM11 are generated in proper phase and magnitude in addition to the dominant, TE11 mode, which are passed through the corrugated structure to generate HE11 and HE21 modes. The feed was then used as a source to illuminate aperture of offset parabolic reflector antenna having offset angle of 90 deg and very small F/D of 0.4. The secondary patterns were simulated using method of physical optic. Significant reduction in cross polarization is obtained compared to illumination of offset reflector by conventional corrugated feed.
引用
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页码：8 / 10
页数：3
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