Design Method for a Low-Profile Dual-Shaped Reflector Antenna with an Elliptical Aperture by the Suppression of Undesired Scattering

Yoshio INASAWA  Shinji KURODA  Kenji KUSAKABE  Izuru NAITO  Yoshihiko KONISHI  Shigeru MAKINO  Makio TSUCHIYA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.4   pp.615-624
Publication Date: 2008/04/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.4.615
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
Keyword: 
low-profile antenna,  shaped reflector,  dual-shaped reflector antenna,  elliptical aperture,  mobile satellite communications,  genetic algorithm,  

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Summary: 
A design method is proposed for a low-profile dual-shaped reflector antenna for the mobile satellite communications. The antenna is required to be low-profile because of mount restrictions. However, reduction of its height generally causes degradation of antenna performance. Firstly, an initial low-profile reflector antenna with an elliptical aperture is designed by using Geometrical Optics (GO) shaping. Then a Physical Optics (PO) shaping technique is applied to optimize the gain and sidelobes including mitigation of undesired scattering. The developed design method provides highly accurate design procedure for electrically small reflector antennas. Fabrication and measurement of a prototype antenna support the theory.