Title :
Planar antenna for continuous beam scanning and broadside radiation by selective surface wave suppression
Author :
Podilchak, Symon K. ; Antar, Yahia M. M. ; Freundorfer, Alois ; Baccarelli, P. ; Burghignoli, P. ; Paulotto, S. ; Lovat, G.
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, ON, Canada
Abstract :
A printed leaky-wave antenna (LWA) based on a grating of concentric annular microstrip rings fed by a non-directive TM0 surface-wave launcher (SWL) is presented for two-sided continuous beam scanning and broadside radiation. By appropriate selection of the grating periodicity TE field distributions can be suppressed over a large bandwidth ensuring efficient TM0 leakage and radiation into the far field. Measured results demonstrate a pencil beam at broadside with a 3 dB beamwidth less than 6 at 17.9 GHz. The presented LWA may be useful for radar and surveillance systems where continuous beam scanning through broadside is desired.
Keywords :
antenna arrays; antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; planar antennas; TE field distributions; broadside radiation; concentric annular microstrip rings fed; continuous beam scanning; frequency 17.9 GHz; nondirective TMo surface-wave launcher; planar antenna; printed leaky-wave antenna; radar systems; selective surface wave suppression; surveillance systems;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.0074
