DocumentCode :
1001381
Title :
Broad-band antenna array with application to radio astronomy
Author :
Rufenach, Clifford L. ; Cronyn, W.M. ; Neal, K.L.
Author_Institution :
US Dept. of Commerce, Boulder, CO, USA
Volume :
21
Issue :
5
fYear :
1973
fDate :
9/1/1973 12:00:00 AM
Firstpage :
697
Lastpage :
700
Abstract :
A broad-band antenna element and beam-forming matrix have been developed for reception of signals at 25-100 MHz. The element is a zig-zag log-periodic antenna with a nominal impedance of 
and a VSWR of less than 1.9. The matrix utilizes time-delay gradients to obtain frequency-independent beam positions and also allows several different beam positions to be monitored simultaneously. Observations of natural radio sources using a 16-element array have verified its usefulness.
and a VSWR of less than 1.9. The matrix utilizes time-delay gradients to obtain frequency-independent beam positions and also allows several different beam positions to be monitored simultaneously. Observations of natural radio sources using a 16-element array have verified its usefulness.Keywords :
Log-periodic antennas; Radio telescopes; VHF antennas; Antenna arrays; Bandwidth; Frequency; Impedance; Log periodic antennas; OWL; Optical coupling; Radio astronomy; Transmission line matrix methods; Wire;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1973.1140558
Filename :
1140558
Link To Document :
