Home // ICWMC 2011, The Seventh International Conference on Wireless and Mobile Communications // View article

A Bidirectional Semi-Passive DS-CDMA-RFID Transponder for the UHF Band

Authors:
Andreas Loeffler
Ingo Altmann

Keywords: Radiofrequency identification; UHF; transponder; Backscatter.

Abstract:
This paper presents a first realization of a semi-passive UHF RFID transponder featuring a direct sequence code division multiple access channel access method for the RFID uplink, and, in addition, some limited downlink abilities, including carrier frequency and field strength measurements. The paper shows experimental results of the proposed transponder, which is already included within an UHF RFID system, containing an RFID reader being able to read out the transponders' data. The focus of this work is on the transponder's modulator, generating an ASK-like modulation scheme by impedance miss-matching techniques. This paper presents results obtained from real life measurements of a realized UHF RFID transponder qualified for the application in CDMA-based RFID systems.

Pages: 176 to 181

Copyright: Copyright (c) IARIA, 2011

Publication date: June 19, 2011

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-140-3

Location: Luxembourg City, Luxembourg

Dates: from June 19, 2011 to June 24, 2011