Title :
New leaky-wave antennas using surface-wave launchers and planar metallic grating lenses
Author :
Podilchak, Symon K. ; Freundorfer, Al P. ; Antar, Yahia M M
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
Abstract :
Planar metallic grating lenses for SW divergence and bound, plane-wave generation are utilized in the design of leaky-wave antennas (LWAs) for millimeter-wave frequencies of operation. By using a printed surface-wave launcher (SWL) feed and circular and straight metallic strips, cylindrical leaky-waves (LWs) can be excited on a planar grounded dielectric slab (GDS). Specifically, by the addition of these planar lenses SWs can be refracted, altering the phase velocity and field distribution of the guided wave, realizing a larger effective aperture. Increased gain values can be observed in the far field by such passive beam pattern control. These 2-D LWAs may be desirable for their compatibility with other planar designs, low cost, and directive beam patterns, thus making them attractive for radar systems and satellite communications.
Keywords :
antenna feeds; antenna radiation patterns; aperture antennas; dielectric bodies; electromagnetic wave refraction; leaky wave antennas; lens antennas; microstrip antennas; millimetre wave antennas; planar antennas; surface electromagnetic waves; 2D LWA; GDS; SW divergence; SWL feed; circular metallic strip; cylindrical leaky-wave antenna aperture; electromagnetic wave refraction; guided wave field distribution; guided wave phase velocity; millimeter-wave frequency; passive directive beam pattern control; planar grounded dielectric slab; planar metallic grating lens; plane-wave generation; printed surface-wave launcher feed; radar system; satellite communication; straight metallic strip; Apertures; Dielectrics; Feeds; Frequency; Gratings; Leaky wave antennas; Lenses; Millimeter wave radar; Optical design; Slabs;
Conference_Titel :
Electromagnetics in Advanced Applications, 2009. ICEAA '09. International Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-4244-3385-8
Electronic_ISBN :
978-1-4244-3386-5
DOI :
10.1109/ICEAA.2009.5297418