DocumentCode :
1001833
Title :
An array technique for reducing ground losses in the HF range
Author :
De Santis, Charles M. ; Campbell, Dons V. ; Schwering, Felix
Author_Institution :
U. S. Army Electronics Command, Fort Monmouth, NJ, USA
Volume :
21
Issue :
6
fYear :
1973
fDate :
11/1/1973 12:00:00 AM
Firstpage :
769
Lastpage :
773
Abstract :
Ground losses of HF antennas situated near the earth\´s surface are reduced if single antennas are replaced by small arrays of, for example, two or four closely spaced radiating elements. It is shown both theoretically and experimentally that an array spacing of 
is sufficient to achieve significant improvement in ground-to-ground transmission efficiency. In particular in the lower HF range and for poorly conducting ground, the improvement approaches a theoretical limit equal to the number of elements in the array.
is sufficient to achieve significant improvement in ground-to-ground transmission efficiency. In particular in the lower HF range and for poorly conducting ground, the improvement approaches a theoretical limit equal to the number of elements in the array.Keywords :
Antenna arrays; Dipole arrays; Elevated antennas; HF antennas; Antenna arrays; Conductivity; Dipole antennas; Earth; Hafnium; Power generation; Propagation losses; Transmitting antennas; Wire;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1973.1140601
Filename :
1140601
Link To Document :
