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A Study on Design of Multimode Feed Horn Antenna for High Power Microwave Antenna System  

Lee Sang-Heun (Dept. of Electric and Electronic Engineering, Yonsei University)
Yoon Young-Joong (Dept. of Electric and Electronic Engineering, Yonsei University)
Lee Byoung-Moo (Telecommunication Network Business, Samsung Electronics))
So Joon-Ho (Agency for Defense Development)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.5, 2006 , pp. 476-482 More about this Journal
Abstract
In this paper, a multimode feed horn antenna is suggested for a high power microwave(HPM) antenna system. The proposed HPM feed horn antenna which is connected with a mode converter is located between source and reflector antenna. A multimode feed horn antenna which has reduced -25 dB beamwidth is designed and fabricated for miniaturization of reflector antenna because -25 dB beamwidth which is determined by considering spillover of feed horn antenna decides a size of reflector in case of HPM. As a result, feed system which uses the multimode feed horn antenna has high gain about 27 dBi and return loss is less than -22 dB at 10 GHz. The measured -25 dB beamwidths of the radiation pattern at vertical, horizontal-plane equal to $20.24^{\circ},\;28.92^{\circ}$ which is less than about $10^{\circ}$ beamwidth of conventional feed system. Thus the suggested feed hem antenna is suitable to feed horn for miniaturization of HPM antenna system.
Keywords
Multimode; Horn; Breakdown Phenomenon; High Power System;
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