Title :
Frequency invariant interferometry
Author :
Musselman, R.L. ; Norgard, J.D.
Author_Institution :
Outland Communications, Colorado Springs, CO, USA
Abstract :
Frequency-independent phase comparison interferometry as a method of direction finding is discussed. Theoretical relationships are derived that show that the electrical phase between two elements of an array can remain approximately constant over frequency. The theory is developed for log-periodic dipole arrays. Design and fabrication of a two-element interferometer using log-periodic antennas are discussed. Experimental results show that this array remains frequency independent over a three-octave bandwidth.<>
Keywords :
dipole antennas; microwave antenna arrays; radio direction-finding; radiowave interferometers; direction finding; electrical phase; fabrication; frequency invariant interferometry; log-periodic dipole arrays; phase comparison interferometry; three-octave bandwidth; two-element interferometer; Bandwidth; Dipole antennas; Directive antennas; Frequency; Interferometry; Log periodic antennas; Phase measurement; Phased arrays; Springs; Wideband;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221452
