A wireless sensing system includes a sensor made from an electrical conductor shaped to form an open-circuit, electrically-conductive spiral trace having inductance and capacitance. In the presence of a time-varying magnetic field, the sensor resonates to generate a harmonic response having a frequency,...http://www.google.fr/patents/US20070181683?utm_source=gb-gplus-shareBrevet US20070181683 - Wireless Sensing System Using Open-Circuit, Electrically-Conductive Spiral-Trace Sensor
Wireless Sensing System Using Open-Circuit, Electrically-Conductive Spiral ...
