DocumentCode :
1028333
Title :
Comments on "Synthesis of offset dual shaped subreflector antennas for control of Cassegrain aperture distributions"
Author :
Kildal, Per-Simon ; Galindo-Israel, V. ; Mittra, Raj
Author_Institution :
Norwegian Institute of Technology, Trondheim, Norway
Volume :
32
Issue :
10
fYear :
1984
fDate :
10/1/1984 12:00:00 AM
Firstpage :
1142
Lastpage :
1145
Abstract :
In the paper by V. Galindo-Israel and R. Mittra it is claimed that a dual shaped subreflector (DSS) feed can be used to upgrade the efficiency of classical Cassegrain antennas. In this comment it is shown that upgrading is not possible unless the diameter of the DSS feed is extremely large. In fact, if the Cassegrain antenna at Goldstone, CA, used as an example in the above paper, is fed by the DSS feed, the efficiency in 
-band will be about the same as or less than if it is fed directly by an optimized scalar horn. The low efficiency is caused by diffraction. Instead, the efficiency can be upgraded by using a scalar horn with shaped lens.
-band will be about the same as or less than if it is fed directly by an optimized scalar horn. The low efficiency is caused by diffraction. Instead, the efficiency can be upgraded by using a scalar horn with shaped lens.Keywords :
Antenna feeds; Antennas and propagation; Aperture antennas; Decision support systems; Diffraction; Fourier transforms; Horn antennas; Integral equations; Quadratic programming; Shape control;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1984.1143198
Filename :
1143198
Link To Document :
