1211635-A2 is referenced by 6 patents and cites 5 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 (RL/RA) 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
EP20010310061 20011130
Publication Number
1211635 (A2)
Application Date
November 30, 2001
Publication Date
June 5, 2002
Inventor
Mcmurray John
ZA
Turner Christopher Gordon Gerv
ZA
Assignee
Supersensor Proprietary
ZA
IPC
G06K 07/10
G06K 19/07
H04B 05/02
H04B 01/59
G06K 19/07
H01Q 23/00
H04B 05/02
H04B 01/59
G06K 19/07
H01Q 23/00
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