High-Efficiency, Dielectric Slab Leaky-Wave Antennas

Tasuku TESHIROGI  Yuki KAWAHARA  Aya YAMAMOTO  Yuji SEKINE  Nobuyuki BABA  Masanao KOBAYASHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E84-B   No.9   pp.2387-2394
Publication Date: 2001/09/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Millimeter-Wave Antennas
Keyword: 
millimeter wave,  leaky-wave antenna,  dielectric slab,  antenna efficiency,  

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Summary: 
A novel millimeter-wave planar leaky-wave antenna is described which consists of a dielectric slab loaded by metallic periodic strips. Several new techniques are discussed, such as an air-gapped dielectric waveguide to reduce conductor loss of the ground plane, a canceling array to suppress the reflections in the waveguide due to the metallic strips, a compact feed, and a simple polarizer. By applying these new techniques, we achieved an excellent antenna efficiency, exceeding 70% at 76 GHz band for both vertical and 45-degree inclined linear polarizations.