DocumentCode :
1015844
Title :
Range-testing a conical logarithmic spiral antenna for a dual-polarized riometer
Author :
Wilkinson, W.J. ; Vaneldik, J.F. ; Routledge, D.
Author_Institution :
Univ. of Alberta, Edmonton, AL, Canada
Volume :
26
Issue :
6
fYear :
1978
fDate :
11/1/1978 12:00:00 AM
Firstpage :
870
Lastpage :
872
Abstract :
The off-axis axial ratios and the radiation patterns of conical log spiral models have been examined experimentally at a single frequency with the objective of finding a circularly polarized antenna of small physical height, suitable for use in decametric dual-polarized riometers. Truncation of a narrow-cone-angle spiral produced rapid axial-ratio degradation below 
height in tests performed at 960 MHz. A wide-cone-angle configuration was found, however, with all the characteristics desired, particularly axial ratio 
out to 
zenith angle, with height only 
.
height in tests performed at 960 MHz. A wide-cone-angle configuration was found, however, with all the characteristics desired, particularly axial ratio out to zenith angle, with height only .Keywords :
Antenna measurements; Conical antennas; Ionospheric measurements; Log-spiral antennas; Absorption; Antenna theory; Aperture antennas; Microwave antennas; Optical surface waves; Polarization; Power measurement; Reflector antennas; Spirals; Surface waves;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1978.1141959
Filename :
1141959
Link To Document :
