DocumentCode :
740633
Title :
A New Physical Optics Based Approach to Subreflector Shaping for Reflector Antenna Distortion Compensation
Author :
Gonzalez-Valdes, Borja ; Martinez-Lorenzo, Jose Angel ; Rappaport, Carey ; Pino, A.G.
Author_Institution :
ECE Dept., Northeastern Univ., Boston, MA, USA
Volume :
61
Issue :
1
fYear :
2013
Firstpage :
467
Lastpage :
472
Abstract :
Thermal and gravitational effects distort the surface of large reflector antennas and degrade the antenna pattern. When operating with electrically large reflector antennas the surface error limits the high frequency applicability. The behavior of the distorted reflector can be improved by using various techniques to compensate the reflector distortions. This communication presents a new physical optics based approach to synthesize shaped subreflectors to achieve such a compensation. The main contribution of the communication is that the method is not based in computationally intensive calculation nor optimization and thus presents very low calculation times when applied to large antennas. Representative results and comparison with previous approaches to the same problem are presented.
Keywords :
antenna radiation patterns; optimisation; physical optics; reflector antennas; antenna pattern; gravitational effect; high frequency applicability; optimization; physical optics based approach; reflector antenna distortion compensation; subreflector shaping; thermal effect; Antennas; Equations; Magnetic domains; Mathematical model; Optical surface waves; Surface impedance; Vectors; Distortion compensation; reflector antennas; subreflector shaping;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2012.2220093
Filename :
6308703
Link To Document :
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