Passive transponder used for localization of people and of objects with the help of radio transmitter and receiver, has transmission line that matches impedance of diode to impedance of metal antennae

摘要

A diode (3) is connected between the main surfaces of a metal antennae (1). The metal antennae are surrounded by a dielectric. A transmission line (8) matches the impedance of the diode to the impedance of the metal antennae.