Reconfigurable antenna using photoconducting switches
online resourceposted on 10.07.2007, 10:22 by Chinthana PanagamuwaChinthana Panagamuwa, J. C. Vardaxoglou
This paper presents a design for an optically reconfigurable printed dipole antenna. 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 infra-red laser diodes channelled through fibre 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.
- Mechanical, Electrical and Manufacturing Engineering