DocumentCode
1966672
Title
Dielectric Spherical Antenna Excited by a Cylindrical Currugated Waveguide
Author
Neelakantaswamy, P.S. ; Banerjee, D.K.
Author_Institution
Lecturer, Department of Electrical Engineering, Indian Institute of Technology, Madras-600036, India.
fYear
1975
fDate
1-4 Sept. 1975
Firstpage
600
Lastpage
604
Abstract
The radiation characteristics of a homogeneous dielectric sphere illuminated by a corrugated cylindrical waveguide with quarter wave teeth, carrying the hybrid mode (HE11) are studied. The field distribution at the aperture of the corrugated pipe is used as the sphere-illuminating source and the dielectric sphere is placed in front of, but displaced from this aperture. It is shown that this feed system has a near-circular far-field characteristics with increased on-axis gain. The feed also has reduced input VSWR due to the aperture-sphere separation; Theoretical expressions are derived for the radiated far-field components by treating the off-set sphere as a microwave lens. Experimental results obtained from a test-feed confirm the theoretical calculations made.
Keywords
Apertures; Dielectrics; Feeds; Frequency; Horn antennas; Lenses; Optical waveguides; Teeth; Testing; Waveguide theory;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1975. 5th European
Conference_Location
Hamburg, Germany
Type
conf
DOI
10.1109/EUMA.1975.332138
Filename
4130876
Link To Document