Frequency and beam reconfigurable antenna using photoconducting switches

Panagamuwa, Chinthana; Chauraya, Alford; Vardaxoglou, J. C.

PblshrPDF_IEEETAP_FreqBeam.pdf (791.16 kB)

Frequency and beam reconfigurable antenna using photoconducting switches

journal contribution

posted on 2007-07-04, 14:57 authored by Chinthana PanagamuwaChinthana Panagamuwa, Alford ChaurayaAlford Chauraya, J. C. Vardaxoglou

A design for an optically reconfigurable printed dipole antenna is presented. A wideband coplanar waveguide (CPW) to coplanar stripline (CPS) transition is used to feed the balanced printed dipole. Two silicon photo switches are placed on small gaps in both dipole arms equidistant from the centre feed. Light from two infrared laser diodes channelled through fiber optic cables is applied to the switches. With the gaps in the dipole bridged, the antenna resonates at a lower frequency. Measured return loss results that compare well to the simulated values are also presented, showing a frequency shift of nearly 40%. The change in bore-sight gain along with radiation patterns are also presented. Activating each switch individually results in a near 50 shift in beam nulls.

History

School

Mechanical, Electrical and Manufacturing Engineering

Citation

PANAGAMUWA, C.I., CHAURAYA, A. and VARDAXOGLOU, J.C. (2006). Frequency and beam reconfigurable antenna using photoconducting switches. IEEE Transactions on Antennas and Propagation, 54, (2), pp. 449-454

Publisher

Publication date

2006

Notes

This article was published in the journal IEEE Transactions on Antennas and Propagation [© IEEE] and is available at: http://www.ict.csiro.au/aps/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.