Patent ID: 6723048
Filing Date: 2004-04-20
Classification: A61B,H01F

Abstract:
An apparatus for substantially noise-free transmission of an Rf signal comprising:(a) a plurality of spaced-apart permanent magnets that generate a magnetic field; (b) at least one transmission node, and at least one reflection node spaced apart from the transmission node with a gap therebetween, that are disposed within the magnetic field, the transmission and reflection nodes comprised of an electrically-conductive material; (c) a source that generates an Rf signal having a selected frequency spectrum that is connected to the transmission node and reflection node, such that a detectable Rf signal is received by the reflection nodes; (d) an analyzer connected to the transmission node and the reflection node that analyzes the Rf signal received by the reflection node; and, (e) a space between the transmission node and reflection node for receiving a sample comprising an analyte, such that an Rf signal having a magnitude at a characteristic frequency is detectable by the analyzer when the sample is placed in the space or receptacle, the magnitude at the characteristic frequency is reduced as a function of analyte concentration.