Optimum ASK Modulation Scheme for Passive RFID Tags Under Antenna Mismatch Conditions

Author

Xi, Yao ; Kwon, Sungwook ; Kim, HyungChul ; Cho, Hanjin ; Kim, Minsu ; Jung, Sungchan ; Park, Cheon-Seok ; Kim, Jihong ; Yang, Youngoo

Author_Institution

Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

57

Issue

10

fYear

2009

Firstpage

2337

Lastpage

2343

Abstract

We propose optimized ON/OFF states of the backscattered amplitude shift keying (ASK) modulator for the passive RF identification (RFID) tags. This takes into account both the reader receiver sensitivity and tag antenna mismatch conditions. Based on the analysis of the power transfer between the passive RFID tag and reader, we derived the optimum configuration of the ASK modulator. It maximizes the harvestable power to enhance the identification range between the tag and reader. The performance of the proposed modulator configuration was superior to the conventional scheme. We also developed an optimization procedure of the modulator for a given receiver sensitivity of the reader and various antenna mismatch conditions of the tag.

Keywords

amplitude shift keying; antenna theory; radiofrequency identification; amplitude shift keying modulation; identification range; radiofrequency identification; reader receiver sensitivity; tag antenna mismatch; Amplitude shift keying (ASK); backscatter; modulator; passive RF identification (RFID) tag; reader;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2009.2029032

Filename

5223589