Title :
Continuous one-sided beam scanning through broadside from backfire to forward fire by efficient surface-wave excitation
Author :
Podilchak, Symon K. ; Freundorfer, A.P. ; Antar, Yahia M M
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, ON, Canada
Abstract :
A planar leaky-wave antenna (LWA) defined by a circular configuration of strips that utilizes surface waves (SWs) for leaky wave (LW) excitation is presented for continuous beam scanning and broadside radiation. Specifically, a printed directive surface-wave launcher (SWL) source is employed as the antenna feed, generating unidirectional SW field distributions on a grounded dielectric slab (GDS). Measured maximum gain with a 6° pattern beamwidth was observed at 22.3 GHz +12° away from the broadside direction. Beam scanning is also realized over a large radiating bandwidth (18.0 to 26 GHz) with pointing angles ranging from -55° to +47° in the E(x-z) plane.
Keywords :
antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; planar antennas; GDS; LWA; SWL source; antenna feed; bandwidth 18 GHz to 26 GHz; broadside radiation; continuous one-sided beam scanning; efficient surface-wave excitation; frequency 22.3 GHz; grounded dielectric slab; leaky wave excitation; planar leaky wave antenna; printed directive surface-wave launcher source; surface waves; unidirectional SW field distributions; Antenna measurements; Apertures; Couplings; Feeds; Slabs; Surface waves;
Conference_Titel :
Electromagnetic Theory (EMTS), 2010 URSI International Symposium on
Conference_Location :
Berlin
Print_ISBN :
978-1-4244-5155-5
Electronic_ISBN :
978-1-4244-5154-8
DOI :
10.1109/URSI-EMTS.2010.5636997
