Frequency-based wireless monitoring and identification using spatially inhomogeneous structures

摘要

Wireless tags have a plurality of non-equivalent current pathways, each of which responds differently to an interrogation signal and collectively represent encoded information. The element is subjected to the signal, stimulating the current pathways, each of which contributes to an overall element response. The individual contributions and, hence, the information may be recovered from this overall response. The response of each of the pathways to the signal may vary in terms of one or more of resonant frequency, amplitude, damping, and Q factor.