used as the ground plane below the antenna patch. Actuation of this membrane introduces
an air gap between above the ground plane, and enables control of the antenna‐resonant
frequency from 16.8 to 17.82 GHz (approximately 6% variation).© 2004 Wiley Periodicals,
Inc. Microwave Opt Technol Lett 43: 64–67, 2004; Published online in Wiley InterScience
(www. interscience. wiley. com). DOI 10.1002/mop. 20376