Triple slot arm loaded reconfigurable dual frequency microstrip antenna using varactors

Author

Shynu, S.V. ; Augustin, Gijo ; Aanandan, C.K. ; Mohanan, P. ; Vasudevan, K.

Author_Institution

Dept. of Electron., Cochin Univ. of Sci. & Technol., Kochi, Japan

fYear

2005

fDate

3-8 July 2005

Firstpage

609

Abstract

A novel design of a varactor controlled electronically reconfigurable dual frequency microstrip antenna is presented. Dual frequency operation is realized by embedding a hexagonal slot with extended slot arms within a square patch. Varactor diodes integrated with the slot arms are used to tune the operating frequencies considerably, by applying reverse bias voltage. High tuning ranges of 20.75% and 14.36%, respectively, are realized for the two resonant frequencies when the bias voltage is varied from 0 to -30V. This design has the added advantage of up to 69.6% and 50.9% size reduction for the two resonant frequencies compared to the standard rectangular patch. Maximum band widths of 2.1486% and 1.2960% for the two frequencies, with the operating frequency ratios varying in the range 1.2031 to 1.2704, are observed.

Keywords

UHF antennas; antenna accessories; antenna radiation patterns; microstrip antennas; multifrequency antennas; tuning; varactors; 0 to -30 V; 1.272 to 1.536 GHz; 1.616 to 1.848 GHz; frequency tuning; hexagonal slot; radiation patterns; reconfigurable dual frequency antenna; reverse bias voltage; square patch; triple slot arm loaded microstrip antenna; triple slot arm loaded reconfigurable dual frequency microstrip antenna; varactor controlled reconfigurable antenna; Arm; Diodes; Loaded antennas; Microstrip antennas; Polarization; Resonant frequency; Slot antennas; Tuning; Varactors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2005 IEEE

Print_ISBN

0-7803-8883-6

Type

conf

DOI

10.1109/APS.2005.1552085

Filename

1552085