Transponder used in a remote identification system

Details Transponder used in a remote identification system Transponder used in a remote identification system

1994-06-14

1997-06-24

Swarthout, Brent A.

Communications: electrical

Continuously variable indicating

With meter reading

235380, 235491, 342 44, 342 51, 342361, H04Q 700

Patent

active

056421036

ABSTRACT:
A transponder used in a remote identification system requiring an interrogator and a transponder. The transponder which is thin and compact includes a transmit/receive antenna which is thin for receiving an interrogating signal and a rewrite signal emitted from the interrogator, and for emitting a response signal towards the interrogator. There is a modulator/demodulator for modulating a signal according to a code inherent in the transponder to emit the same from the antenna as the response signal without newly applying energy to the interrogating signal, and for demodulating the rewrite signal. A controller for applying a modulating signal generated according to the inherent code to the modulator/demodulator and for storing a signal demodulated by the modulator/demodulator. A liquid crystal display is used for displaying data including bar codes which can be read by a bar code reader. The bar code can be rewritten.

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1990 IEEE MTT-S International Microwave Symposium Digest vol. II (May8-10, 1990 Dallas Convention Center, Dallas, Texas Krishna K. Agarwal, Publications Chairman.

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