Title :
Effects of a dielectric coating on leaky-wave long-slot waveguide antennas
Author :
Whetten, Frank L. ; Balanis, Constantine A.
fDate :
8/1/1996 12:00:00 AM
Abstract :
A theoretical and experimental study is made of the effects of a dielectric of arbitrary thickness, permittivity, and loss tangent upon the aperture field distributions and the far-field radiation pattern characteristics of long-slot leaky-wave antennas cut on the broadwall of a rectangular waveguide and mounted in an infinite ground plane. The relevant integral equations for determining the aperture fields are developed and then solved using the moment method. Expressions for the far-field radiation patterns and isolation responses are developed. Calculated and experimental results for several antennas are presented and discussed
Keywords :
antenna radiation patterns; antenna testing; aperture antennas; coatings; dielectric losses; dielectric-loaded antennas; integral equations; leaky wave antennas; method of moments; permittivity; rectangular waveguides; slot antennas; aperture field distributions; aperture fields; broadwall; dielectric coating; dielectric thickness; experimental results; far field radiation patterns; infinite ground plane; integral equations; isolation responses; leaky wave long slot waveguide antennas; loss tangent; moment method; permittivity; rectangular waveguide; Antenna radiation patterns; Apertures; Coatings; Dielectric losses; Integral equations; Leaky wave antennas; Permittivity; Planar waveguides; Rectangular waveguides; Waveguide theory;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
