DocumentCode :
1043602
Title :
Experimental test of a stepped zone mirror for microwaves
Author :
Di Francia, G. ; Ronchi, L. ; Russo, V.
Author_Institution :
Centro Microonde, Florence, Italy
Volume :
7
Issue :
5
fYear :
1959
fDate :
12/1/1959 12:00:00 AM
Firstpage :
125
Lastpage :
131
Abstract :
This paper is concerned with the construction and the experimental test of a stepped zone mirror, whose theory has been previously developed. According to the theory, this mirror is free from spherical aberration for any value of the angular aperture and at the same time is corrected for coma. The only monochromatic aberration which cannot be eliminated is astigmatism. A model of the mirror has been built to operate with 
cm. The focal length is 86.4 cm and the angular aperture 
. The test has given results in perfect agreement with the theory within a total field of about 
. Special astigmatic receivers have been designed and built to eliminate the effect of the astigmatism. It is believed that the mirror may be used as a fixed antenna for radio astronomy.
cm. The focal length is 86.4 cm and the angular aperture . The test has given results in perfect agreement with the theory within a total field of about . Special astigmatic receivers have been designed and built to eliminate the effect of the astigmatism. It is believed that the mirror may be used as a fixed antenna for radio astronomy.Keywords :
Reflector antennas; Apertures; Helium; Microwave devices; Microwave theory and techniques; Mirrors; Optical diffraction; Optical receivers; Radio astronomy; Testing; Vision defects;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IRE Transactions on
Publisher :
ieee
ISSN :
0096-1973
Type :
jour
DOI :
10.1109/TAP.1959.1144744
Filename :
1144744
Link To Document :
