06172608 is referenced by 245 patents and cites 13 patents.

An identification and telemetry system including an interrogator (

1

) containing an interrogator antenna (

2

) for generating at an interrogation frequency, an interrogtion signal. The interrogation signal is adapted to excite over an electromagnetic coupling path (M

1

) at least one coded label (

3

) containing a label antenna (

4

) and a label microcircuit (

5

). The coded label is adapted to extract energy from the label antenna and to generate a label reply signal. The label reply signal is adapted to be conveyed to a label reply antenna and, via an electromagnetic coupling path, to a receiver in the interrogator. The label antenna is placed in proximity to a further antenna (

6

) being a parasitic antenna coupled electromagnetically (M

2

, M

3

) with the interrogator antenna and with the label antenna so as to enhance transfer of power between the interrogator and the coded label.

Title
Enhanced range transponder system
Application Number
9/202667
Publication Number
6172608 (B2)
Application Date
December 18, 1998
Publication Date
January 9, 2001
Inventor
Peter Harold Cole
West Lakes Shore
US
Agent
Larson & Taylor
US
Assignee
Integrated Silicon Design
US
IPC
G08B 13/14
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