Summary
International Symposium on Antennas and Propagation
2008
Session Number:4D11
Session:
Number:4D11-3
Expansion of Communication Range of IC Tags Using Re-radiation of Passive Antennas
Yasufumi Hirasawa, Masakazu Ishikawa, Taihei Yamaguchi, Masanobu Kominami, Hirofumi Fujii,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
This study proposes a wireless communication system [1]-[3] which transmits signals between an existing IC tag and an IC tag reader through a coaxial cable, and uses re-radiation from a passive antenna which incorporates no active element such as an amplifier. Using a coaxial cable, it becomes possible to extend the propagation distance to re-radiate electric waves in an area to which they are essentially unreachable by controlling their irradiation. We constructed this system using 13.56 MHz RFID of the electromagnetic induction method, and 2.45 GHz RFID of the microwave method, evaluated the properties of the reader and IC tag for realizing this method, measured the propagation loss of electric waves irradiated from the reader from various aspects, and considered the feasibility of this method both theoretically and experimentally.