DocumentCode :
983236
Title :
A compact, low profile, transmission line antenna--Tunable over greater than octave bandwidth
Author :
Wanselow, R.D. ; Milligan, D.W.
Author_Institution :
Northrop Nortronics, Newbury Park, CA, USA
Volume :
14
Issue :
6
fYear :
1966
fDate :
11/1/1966 12:00:00 AM
Firstpage :
701
Lastpage :
707
Abstract :
Techniques for extending the frequency tuning range of low profile top loaded antennas to greater than one octave are described. The compact antenna is a directly driven resonant radiator (DDRR) which consists of a vertical post radiator, the height of which is less than 
at the highest operating frequency, and which is top loaded by a loosely spiraled unbalanced transmission line which employs a multiple-capacitor tuning scheme to achieve a wide-band, tunable resonant antenna. The measured antenna circuit 
is of the order of 100 or greater and the radiation efficiency, over a large ground plane, is greater than 50 percent that of a quarter-wave monopole over the full operating range.
at the highest operating frequency, and which is top loaded by a loosely spiraled unbalanced transmission line which employs a multiple-capacitor tuning scheme to achieve a wide-band, tunable resonant antenna. The measured antenna circuit is of the order of 100 or greater and the radiation efficiency, over a large ground plane, is greater than 50 percent that of a quarter-wave monopole over the full operating range.Keywords :
Loaded antennas; Transmission lines; Bandwidth; Broadband antennas; Circuit optimization; Distributed parameter circuits; Frequency; Loaded antennas; Resonance; Transmission line antennas; Tunable circuits and devices; Tuning;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1966.1138792
Filename :
1138792
Link To Document :
