Citation:
Presented at Loughborough Antennas & Propagation Conference, Loughborough, 16th - 17th November 2009
Abstract:
A modern approach to an established technique is
investigated for the electronic control of polarisation of
microstrip patch antennas. The control is achieved by placing
micro-electromechanical switches (MEMS) at appropriate
locations in a patch antenna. The microwave MEMS are used to
switch between open and short circuit conditions that allow
reconfiguration of the modal fields. Changing the number and
location of short circuit field regions changes the radiated field
polarisation from linear horizontal to vertical, right hand
circular or left hand polarisation. All of the polarisation states
are obtained without changing the frequency of operation, input
impedance or radiation pattern of the patch an
