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Design of waveguide fed broadband circular polarization truncated horn antenna for high power applications

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2 Author(s)
Theng Huat Gan ; Sch. of EEE, Nanyang Technol. Univ., Singapore, Singapore ; Eng Leong Tan

This paper presents the design of a waveguide fed broadband circular polarization truncated horn antenna for high power applications. It consists of a circular polarization truncated horn antenna and a truncated-square to rectangular waveguide transition. The structure does not have any internal sharp corners and has large inner dimensions in order not to pose much limit on the maximum power-handling capacity. By truncating the corners of a horn, circular polarization modes are generated. The length of the waveguide transition is critical as it affects the axial ratio and return loss of the horn antenna. The antenna has a simulated 3dB axial ratio bandwidth of 23.6% with return loss better than 20dB.

Published in:

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Date of Conference:

5-8 Dec. 2011