Title :
A study on conical spiral antennas for UHF SATCOM terminals
Author :
Zaghloul, Amir I. ; Anthony, Theodore K. ; Coburn, William O´Keefe
Author_Institution :
US Army Res. Lab., Adelphi, MD, USA
Abstract :
A spiral antenna can be designed to cover the octave bandwidth of 200-400 MHz required for the UHF SATCOM system. To make it easily stowed and deployed on demand, the spiral can be printed on a collapsible conical surface similar to a center-fed-reflector deploying mechanism. This paper studies two different configurations for the conical spiral antenna with different subtended conical angles. The first configuration assumes constant radius for the projected circular aperture with different conical angles, requiring different conical length or height. The second configuration assumes same conical length for different conical angles, resulting in different projected circular apertures. The study provides a trade-off between antenna gain, back lobe level, axial ratio, and stowed size.
Keywords :
UHF antennas; conical antennas; spiral antennas; UHF SATCOM terminals; antenna gain; axial ratio; back lobe level; bandwidth 200 MHz to 400 MHz; center-fed-reflector deploying mechanism; circular aperture; collapsible conical surface; conical angles; conical height; conical length; conical spiral antennas; stowed size; Apertures; Bandwidth; Gain; Laboratories; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6349035
