Title :
Non-uniform bias enhancement of a varactor-tuned FSS used with a low profile 2.4 GHz dipole antenna
Author :
Cure, David ; Weller, Thomas M. ; Miranda, Félix A.
Author_Institution :
Dept. of Electr. Eng., Univ. Of South Florida, Tampa, FL, USA
Abstract :
In this paper a low profile antenna using a nonuniformly biased varactor-tuned frequency selective surface (FSS) is presented. The tunable FSS avoids the use of vias and has a simplified DC bias network. The voltages to the DC bias ports can be varied independently allowing adjustment in the frequency response and enhanced radiation properties. The measured data demonstrate tunability from 2.15 GHz to 2.63 GHz with peak efficiencies that range from 50% to 90% and instantaneous bandwidths of 50 MHz to 280 MHz within the tuning range. The total antenna thickness is approximately λ/45.
Keywords :
UHF antennas; antenna radiation patterns; dipole antennas; frequency response; frequency selective surfaces; varactors; DC bias ports; bandwidth 50 MHz to 280 MHz; enhanced radiation property; frequency 2.15 GHz to 2.63 GHz; frequency response; low profile dipole antenna; nonuniform bias enhancement; nonuniformly biased varactor-tuned frequency selective surface; simplified DC bias network; varactor-tuned FSS; Antenna measurements; Antenna radiation patterns; Broadband antennas; Dipole antennas; Frequency selective surfaces; Voltage measurement;
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.2012.6347976
