Table of Contents
ISRN Materials Science
Volume 2011, Article ID 784615, 5 pages
Research Article

Liquid Crystal-Based Reconfigurable Tunable Filter with DBR Topology

Electronics Laboratory, Department of Physics, Faculty of Science, University of Tunis El Manar, Rommana 1068, Tunisia

Received 25 June 2011; Accepted 2 August 2011

Academic Editor: S. Furumi

Copyright © 2011 S. Missaoui and M. Kaddour. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The use of liquid crystals for tunable filter in planar technology is proposed. The design is based on a dual-behavior resonator (DBR) topology. These resonators are based on the association of different parallel open-ended stubs and allow the designer to independently control the in-band and out-of-band responses of the filter. To benefit from liquid crystal anisotropy and thus obtain agility, a bias voltage is applied. The simulated results are compared with measured data, and good agreement is obtained.