Perturbation analysis of planar periodic leaky-wave antennas fed by cylindrical surface-waves

Author

Podilchak, Symon K. ; Mahmoud, Samir F. ; Freundorfer, Al P. ; Antar, Yahia M M

Author_Institution

R. Mil. Coll. of Canada, Kingston, ON, Canada

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

An accurate but simple perturbation analysis of planar cylindrical leaky-wave antennas (LWAs) is presented. Initially a printed LWA, realized by a grounded dielectric slab (GDS) and fed by an array of slots in the ground plane for surface wave (SW) excitation, is considered. Cylindrical leaky wave (LW) radiation by the n = -1 spatial harmonic and perturbation of the TM₀ SW mode of the slab is achieved by the addition of a printed metallic grating. Attenuation and phase constants for the cylindrical LWmode are derived along with the pointing angle and beamwidth as a function of frequency. Results are also in good agreement with full-wave simulations and measurements for some recently designed and fabricated structures.

Keywords

antenna feeds; antenna radiation patterns; leaky wave antennas; microstrip antennas; perturbation theory; TM₀ SW mode; cylindrical leaky wave radiation; cylindrical surface-waves; full-wave simulation; grounded dielectric slab; perturbation analysis; planar periodic leaky-wave antenna feeds; printed LWA; printed metallic grating; spatial harmonic; surface wave excitation; Apertures; Attenuation; Dielectrics; Gratings; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6123715

Filename

6123715