Title :
Planar Leaky-Wave Antenna Designs Offering Conical-Sector Beam Scanning and Broadside Radiation Using Surface-Wave Launchers
Author :
Podilchak, Symon K. ; Freundorfer, Alois P. ; Antar, Yahia M M
Author_Institution :
Electr. Eng. Depts., R. Mil. Coll. of Canada, Kingston, ON
fDate :
6/30/1905 12:00:00 AM
Abstract :
Two planar antenna designs that utilize surface-waves for leaky-wave excitation are investigated. Specifically, a surface-wave launcher is implemented to excite cylindrical surface-waves, which are bound to a grounded dielectric slab. By the addition of circular metallic strip gratings, a partially reflecting surface is realized, providing appropriate conditions for 2-D leaky-wave radiation. In particular, two designs are investigated: a continuous circular strip and a segmented circular strip grating. Results illustrate conical-sector beam scanning for the continuous circular strip grating between 2022 GHz, while broadside radiation is observed at 21.2 GHz by the segmented circular strip design.
Keywords :
antenna radiation patterns; leaky wave antennas; microwave antenna arrays; planar antenna arrays; surface electromagnetic waves; 2D leaky-wave radiation; broadside radiation; circular metallic strip gratings; conical-sector beam scanning; continuous circular strip grating; frequency 20 GHz to 22 GHz; grounded dielectric slab; planar leaky-wave antenna designs; segmented circular strip grating; surface-wave launchers; Grounded Dielectric Slab (GDS); Grounded dielectric slab (GDS); Leaky-Wave (LW); Leaky-Wave Antenna (LWA); Partially Reflecting Surface (PRS); Surface-Wave (SW); Surface-Wave Launcher (SWL); leaky-wave (LW); leaky-wave antenna (LWA); partially reflecting surface (PRS); surface-wave (SW); surface-wave launcher (SWL);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2008.919326
