Design a receiver circuit for 13.56 Mhz long range rfid reader

Abstract

Over the past serveral decades there have been a lot of research papers about the technology and applications of Radio Frequency Identification (RFID). The latest technologies has brought costs down and standards are being developed. At the present, RFID is mainly used as a medium for serveral tasks such as library management, tracking of persons and animals, toll collection and contactless payment, machine readable travel documents and airport baggage tracking logistics. One of the most important part of this technology is the reader. In this paper we will provide data concerning the design and implementation of an improved version of long range RFID Reader that uses the ISO-15693 communication protocol. This reader is equipped with a power amplifier and a gate antenna. The existing reader which developed from a class E power amplifier allows a reading range up to 40cm. In order to increase this number, the receiver circuit from the amplifier to transceiver IC will be improved.