13.56 MHz RFID Antenna Design Using Network and Impedance Analyzers
Application Notes
RFIDs, also called non-contact IC cards or ID tags, are devices that make it possible to detect the presence of objects and verify their identification without contacting them. RFIDs have been used since the 1980’s but initially their use was limited to maritime transports, traffic information systems, and other special applications. Since the middle of 1990’s, RFIDs have been miniaturized at an accelerated rate and they are now widely used. Currently, a number of standards exist that define the frequencies, communication methods, and purposes of RFIDs. This document gives an overview of how to evaluate the electrical characteristics of mass-produced 13.56 MHz RFID tags and readers/ writers and their components.