Title :
Novel Planar Antennas Using Circular, Curved and Straight Gratings for Conical-Sector Beam Patterns
Author :
Podilchak, Symon K. ; Freundorfer, Al P. ; Antar, Yahia M M
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada Kingston, Kingston, ON
Abstract :
Planar antennas that utilize surface-waves (SWs) for leaky-wave (LW) excitation are investigated. Specifically, Yagi-Uda like surface-wave launchers (SWLs) are utilized as the antenna feed, exciting cylindrical SWs on a grounded dielectric slab. With the addition of circular, curved or straight metallic strip gratings, suitable conditions for LW field excitation are achieved. Essentially, the SWL and grating configurations can generate cylindrical LW field distributions within a confined region on the guiding surface. Such aperture fields can produce pencil and conical-sector beam patterns in the far field.
Keywords :
antenna feeds; antenna radiation patterns; planar antennas; antenna feed; aperture fields; circular gratings; conical-sector beam patterns; curved gratings; grounded dielectric slab; leaky-wave excitation; pencil beam patterns; planar antennas; straight metallic strip gratings; surface-wave launchers; Antenna feeds; Antennas and propagation; Aperture antennas; Coplanar waveguides; Dielectrics; Educational institutions; Gratings; Military computing; Planar arrays; Slabs;
Conference_Titel :
Microwave Conference, 2008. EuMC 2008. 38th European
Conference_Location :
Amsterdam
Print_ISBN :
978-2-87487-006-4
DOI :
10.1109/EUMC.2008.4751508
