Title :
A low-profile sinuous antenna
Author :
Sammeta, Rohit ; Filipovic, Dejan S.
Author_Institution :
Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado, Boulder, CO, USA
Abstract :
A lens loaded ferrite backed sinuous antenna is demonstrated where the metallic cavity side wall is eliminated to increase its operational bandwidth. The sinuous aperture forms the fundamental radiator and is loaded with an electrically small lens in order to redirect the power towards the upper hemisphere. The antenna is backed by a ferrite ground plane and is center-fed with 75 Ω cable bundle to obtain good match. The presented configuration has active VSWR <; 3, circular polarized gain > 0 dBiC and wobble of wave (WoW) <; 2dB in the frequency range of 500 MHz to 2.5 GHz while being only λ/3.5 (at 500 MHz) in diameter and height making it the smallest among reported or commercially available sinuous antenna at these frequencies.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; ferrite devices; lens antennas; ferrite ground plane; frequency 500 MHz to 2.5 GHz; fundamental radiator; lens loaded ferrite backed sinuous antenna; metallic cavity side wall; resistance 75 ohm; sinuous aperture; wobble of wave; Antenna measurements; Apertures; Ferrites; Frequency measurement; Lenses; Loaded antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6904992
