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

fYear

2012

fDate

8-14 July 2012

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE

Conference_Location

Chicago, IL

ISSN

1522-3965

Print_ISBN

978-1-4673-0461-0

Type

conf

DOI

10.1109/APS.2012.6347976

Filename

6347976