Chipless wireless temperature sensor based on C-like scatterer for standard RFID reader

Abstract

This summary presents a proof of concept for a passive chipless wireless sensor for temperature range detection. The temperature range information is encoded in a binary format using dual C-like scatterers operating at two different frequencies. The sensing principle is based on resonance shift of the Radar Cross Section (RCS) peaks of the backscattered signal from the two adjacent scatterers. This shifts the reflected power maximum in or out of the bands mapping it to logic ‘1’ or logic ‘0’. The European and ISM bands are chosen for wireless sensor compliance with commercial RFID readers communication standards. This is an attempt to use the conventional RFID standards reader for chipless sensing.