ENERGY TRANSFER IN AN ELECTRONIC IDENTIFICATION SYSTEM

摘要

A radio frequency transponder assembly comprises a passive transponder and a n antenna with a matching circuit comprising an inductor and a capacitor which are formed integrally with the antenna components. For example, the antenna can be a dipole with legs formed from wire or foil strips, in which case the inductor and capacitor are formed from the same material as the antenna legs . The values of the inductor and capacitor are calculated to match the antenna impedance to the equivalent load of the transponder circuit as seen via the power rectification circuits of the transponder.