A Beam-Switchable Antenna Using Dielectric Image Guide with a Movable Periodic Metal Plate

Toru IWASAKI  Tetsuomi IKEDA  Takao KUKI  

B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J91-B   No.7   pp.768-775
Publication Date: 2008/07/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: PAPER
beam-switching,  image guide,  periodic structure,  leaky-wave antenna,  surface-wave antenna,  

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In this paper, we propose a millimeter-wave beam-switchable antenna using a dielectric image guide above which a movable periodic metal plate is placed. This antenna can easily change the beam in the endfire and broadside directions by combining the behavior of a surface-wave antenna and a leaky-wave antenna. We also study a structure to suppress sidelobe due to the remaining power of the leaky-wave antenna by loading a sloping metal reflector at the end of the periodic metal plate. The measurement results indicate that there are good beam-switching performances producing the beam in the endfire and broadside direction.