Electromagnetic identification and location system
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United States of America Patent
Stats
-
Dec 10, 1991
Issued Date -
N/A
app pub date -
Jun 26, 1990
filing date -
Aug 8, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetic identification and location system is described. The system comprises at least one interrogator which, in operation, generates an electromagnetic interrogation field by at least one antenna coil, and at least one responder which, in response to the electromagnetic interrogation field, generates a code signal in accordance with a binary code stored in a code circuit of the responder. The code signal can be recognized by an identifier. According to the invention, the responder is provided with a generator which, in response to the interrogation field, generates and transmits a pilot signal. The system further includes a position-sensitive antenna arrangement for receiving the pilot signal.
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