06870460 is referenced by 11 patents and cites 10 patents.

A transponder 14.1 for a radio frequency (RF) identification system comprises an antenna 22.1 having an antenna impedance (ZA) having a real part (RA) connected to transponder circuitry presenting a load impedance (ZL) having a real part (RL), a ratio ( R L R A ) of the real part (RL) of the load impedance and the real part (RA) of the antenna impedance having a first value that is bigger than one when the transponder is not transmitting data. During transmission of data the ratio is switched between the first value and a second smaller value.

Title
Input impedance arrangement for RF transponder
Application Number
9/996937
Publication Number
6870460 (B2)
Application Date
November 30, 2001
Publication Date
March 22, 2005
Inventor
John McMurray
Gauteng
ZA
Christopher Gordon Gervase Turner
Gauteng
ZA
Agent
Finnegan Henderson Farabow Garrett & Dunner L
Assignee
Supersensor
ZA
IPC
H04Q 005/22
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