DocumentCode :
987491
Title :
Input Admittance of a Circular Waveguide Aperture Covered by a Dielectric Slab
Author :
Bailey, Marion C. ; Swift, Calvin T.
Author_Institution :
National Aeronautics and Space Administration, Langley Research Center, Hampton, VA, USA
Volume :
16
Issue :
4
fYear :
1968
fDate :
7/1/1968 12:00:00 AM
Firstpage :
386
Lastpage :
391
Abstract :
The input admittance of a circular waveguide opening onto an infinite flange with a homogeneous lossy dielectric coating is derived using integral transforms and assuming the dominant TE11 mode as the trial field at the aperture. Admittance calculations for low-loss dielectric sheets of various thicknesses are given and compared with measurements obtained using ground planes of varying sizes. Excellent agreement with theory is obtained for the circular waveguide terminated into a square ground plane only 
to 
. on a side. A quantitative comparison of the surface wave contribution to the total admittance is also given.
to . on a side. A quantitative comparison of the surface wave contribution to the total admittance is also given.Keywords :
Dielectric-covered antennas; Waveguide antennas; Admittance measurement; Apertures; Coatings; Dielectric losses; Dielectric measurements; Flanges; Size measurement; Slabs; Tellurium; Thickness measurement;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1968.1139207
Filename :
1139207
Link To Document :
