Beam Scanning Comb-Line Antenna Loading Movable Dielectric Plate

Kazuhiro KITATANI  Takahiko TERADA  Yasuyuki OKAMURA  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.9   pp.2213-2218
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2213
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Antennas
microstrip antenna,  comb-line,  mechanical beam scan,  dielectric,  

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This paper describes a beam scanning antenna that consists of a movable dielectric plate loaded onto a microstrip comb-line antenna. This type of antenna uses a mechanical system and so offers a simple structure and low cost. The main beam direction of the proposed antenna is changed by moving the dielectric plate. The guide wavelength of the microstrip line was measured at the quasi-millimeter wave band (20 GHz) when moving the dielectric plate to investigate the possibility of beam scanning. The proposed antenna was fabricated to experimentally demonstrate its principle operation. A possible beam scanning angle of 20 degrees was confirmed.