Title
Analysis Of Electrically Small Hyperbolic Subreflectors Utilizing The Geometrical-Theory Of Diffraction
Abbreviated Journal Title
J. Electromagn. Waves Appl.
Keywords
Engineering, Electrical & Electronic; Physics, Applied
Abstract
Cassegrain antennas have been utilized in applications where small size is critical. It has been observed that for antennas having subreflectors of the order of only several lambda in diameter, near-in sidelobe levels rise beyond normally predicted values. E-plane sidelobes are often several dB higher than those in the H-plane. Disturbances in the illumination of the primary reflector due to diffraction limitations of the electrically small subreflector are a possible cause of the sidelobe phenomenon. In this work, the results for 3 to 8 lambda-diameter hyperboloidal subreflectors, using the geometrical theory of diffraction (GTD) are presented and compared with the physical optics approach and other data. Degradation of the scatter patterns are observed as the subreflector size is decreased, and the differences in the E-and H-plane phase and amplitude patterns are observed in the GTD solution.
Journal Title
Journal of Electromagnetic Waves and Applications
Volume
7
Issue/Number
7
Publication Date
1-1-1993
Document Type
Article
Language
English
First Page
987
Last Page
1004
WOS Identifier
ISSN
0920-5071
Recommended Citation
"Analysis Of Electrically Small Hyperbolic Subreflectors Utilizing The Geometrical-Theory Of Diffraction" (1993). Faculty Bibliography 1990s. 666.
https://stars.library.ucf.edu/facultybib1990/666
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu