Method of grouping RF transponders

Details Method of grouping RF transponders Method of grouping RF transponders

1996-09-30

1998-07-07

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

342 42, H04Q 100

Patent

active

057775613

ABSTRACT:
A method of selecting groups of radio frequency RF transponders (tags) for communication between a base station and the tags. The tags are selected into groups according to a physical attribute ofthe signal sent by the tags to the base station, or according to the physical response of the tags to a physical attribute of the signal sent from the base station to the tags. Communication with the tags is thereby simplified, and the time taken to communicate with the first tag is markedly reduced.

REFERENCES:
patent: 4636950 (1987-01-01), Caswell
patent: 4673932 (1987-06-01), Ekchain
patent: 5214410 (1993-05-01), Verster
patent: 5410315 (1995-04-01), Huber
patent: 5550547 (1996-08-01), Chan
patent: 5588005 (1996-12-01), Ali
patent: 5606323 (1997-02-01), Heinrich
patent: 5673037 (1997-09-01), Cesar

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