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High-Efficiency, Dielectric Slab Leaky-Wave Antennas
Tasuku TESHIROGI Yuki KAWAHARA Aya YAMAMOTO Yuji SEKINE Nobuyuki BABA Masanao KOBAYASHI
IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
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
millimeter wave, leaky-wave antenna, dielectric slab, antenna efficiency,
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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.