Miniaturized and reconfigurable CPW square-ring slot antenna using thin film varactor technology

Author

Jiang, Hai ; Patterson, Mark ; Brown, Dustin ; Zhang, Chenhao ; Pan, KenChuang ; Subramanyam, Guru ; Kuhl, David ; Leedy, Kevin ; Cerny, Charles

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Dayton, Dayton, OH, USA

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

Ferroelectric (FE) Barium Strontium Titanate (Ba_(1-x)Sr_xTiO₃, BST) thin film varactor technology is applied to the antenna miniaturization and reconfiguration successfully. CPW square-ring slot antenna is used as a design example, and antennas with and without integrated BST varactors were fabricated and characterized. Including the total ground, the size of miniaturized antenna is 0.12λ₀ × 0.12λ₀ which is reduced by 31% compared with antenna without the BST varactors. Moreover, the frequency of the miniaturized antenna with the BST varactors is reconfigurable from 5.8 GHz to 6.1 GHz with a low DC biasing voltage of 3 V. Both E-plane and H-plane patterns were measured for the antennas. Fabrication details and measurement setup are also presented.

Keywords

barium compounds; coplanar waveguides; ferroelectric thin films; microwave antennas; slot antennas; strontium compounds; varactors; waveguide antennas; DC biasing voltage; E-plane pattern; H-plane pattern; ferroelectric barium strontium titanate thin film varactor technology; frequency 5.8 GHz to 6.1 GHz; integrated BST varactor; measurement setup; reconfigurable CPW square ring slot antenna miniaturization; voltage 3 V; Antenna measurements; Coplanar waveguides; Loaded antennas; Slot antennas; Varactors; Ferroelectric; antenna miniaturization; coplanar waveguide (CPW); high permittivity material; reconfigurable antenna; ring slot antenna; thin film; varactor loading;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972906

Filename

5972906