Title :
Limitations of the projected shadow method for estimating the strut influence in paraboloidal antennas
Author :
Hombach, V. ; Thielen, H.
Author_Institution :
Deutsche Bundespost, Forschungsinstitut, Darmstadt, West Germany
Abstract :
The results of two convenient methods for calculating the sidelobe level caused by the feed support struts of paraboloidal reflector antennas have been compared. These methods are the simple `projected shadow method¿ and the more sophisticated `equivalent current approach¿. It turns out that the shadow method is applicable for the computation of the sidelobes of large antennas up to an angle of 3 to 4° from boresight and in the case of small antennas up to 8 to 10°.
Keywords :
antenna radiation patterns; antenna theory; reflector antennas; dish antennas; equivalent current approach; feed support struts; large antennas; limitations; parabolic antennas; paraboloidal antennas; paraboloidal reflector antennas; projected shadow method; sidelobe computation; sidelobe level; small antennas; strut influence;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840539
