Patent ID: 6667725
Filing Date: 2003-12-23
Classification: H01Q

Abstract:
A microelectromechanical (MEM) radio frequency (RF) transmitting system having no directly connected power source comprising:a) a planar substrate having a first planar surface and a second parallel opposing surface, said second surface having a cavity etched therein b) a first capacitive plate positioned upon said first surface opposite said cavity, c) a second capacitive plate positioned upon said second surface such that said second capacitive plate extends across the opening of said cavity, e) a planar inductor coil affixed to said first surface whereby said inductor coil circumscribes said first capacitive plate, f) said first and second capacitive plates cooperating with said inductor coil to form a micro-miniature oscillating circuit whereby said microminiature oscillating circuit acts to charge the capacitor formed by said first and second opposing capacitive plates when said inductor coil is subjected to an electromagnetic field and transmits an RF signal when said electromagnetic field is removed, said RF signal being determined by the capacitive value of said capacitor.