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Low-Sidelobe Multimode Horn Design for Circular Coverage Based on Quadratic Programming Approach
Hiroyuki DEGUCHI Mikio TSUJI Hiroaki WATANABE
IEICE TRANSACTIONS on Electronics
Publication Date: 2008/01/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: Antenna Theory
horn antennas, antenna gain, radiation patterns, optimization,
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To obtain a broad circular-coverage beam with low sidelobe, this paper proposes optimization design based on the quadratic programming approach for circular horns. The desired excitation coefficients of higher-order modes are pre-determined and also evaluated by calculating universal radiation patterns. We show a design example of a multimode horn which has circular-coverage beam with low sidelobe level of about -30 dB. The effectiveness of the designed horn is discussed by evaluating VSWR and radiation characteristics in X-band numerically and experimentally.