Title :
A novel polygonal spiral antenna
Author :
Rahman, Nahid ; Afsar, Mohammed ; Cheung, Rudolph
Author_Institution :
Dept. of Electr. Eng., Tufts Univ., Medford, MA, USA
Abstract :
In this paper, we present a novel 2-18 GHz polygonal spiral antenna that approximates a circular spiral in its highest frequencies and gradually transforms itself into a square spiral antenna at its lowest frequencies of operation. The design has successfully addressed the problem of high axial ratios associated with UWB rectangular spiral antenna systems. Our results demonstrate that the polygonal spiral antenna demonstrates excellent axial ratio and gain-bandwidth performance with ≤3 dB axial ratio over 93.5% of its operational bandwidth.
Keywords :
UHF antennas; microwave antennas; spiral antennas; ultra wideband antennas; UWB rectangular spiral antenna systems; circular spiral; frequency 2 GHz to 18 GHz; gain-bandwidth performance; polygonal spiral antenna; square spiral antenna; Bandwidth; Gain; Microwave antennas; Spirals; Ultra wideband antennas;
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.2012.6348530
