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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 924768, 6 pages
http://dx.doi.org/10.1155/2013/924768
Research Article

Planar Ultrawideband Antenna with Photonically Controlled Notched Bands

Universidad Politécnica de Madrid, 28031 Madrid, Spain

Received 7 December 2012; Accepted 29 January 2013

Academic Editor: Diego Caratelli

Copyright © 2013 Drasko Draskovic et al. 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.

Abstract

A design of a planar microstrip-fed ultrawideband (UWB) printed circular monopole antenna with optically controlled notched bands is presented. The proposed antenna is composed of a circular ultrawideband patch, with an etched T-shaped slot controlled by an integrated silicon switch. The slot modifies the frequency response of the antenna suppressing 3.5–5 GHz band when the switch is in open state. The optical switch is controlled by a low-power near-infrared (808 nm) laser diode, which causes the change in the frequency response of the antenna generating a frequency notch. This solution could be expanded to include several notches in the antenna frequency response achieving a fully reconfigurable UWB antenna. The antenna could be remotely controlled at large distances using optical fiber. The prototype antenna has been fully characterized to verify these design concepts.