Multifunctional electromagnetic transponder device and method fo

Details Multifunctional electromagnetic transponder device and method fo Multifunctional electromagnetic transponder device and method fo

1997-12-29

2000-08-08

Tokar, Michael

Communications: electrical

Selective

Interrogation response

H04Q 522

Patent

active

061007889

ABSTRACT:
A multifunctional electromagnetic transponder device for tracking objects, such as tape cartridges, utilized in different types of environments includes a first antenna operating at a first range of frequencies and a second antenna operating at a second range of frequencies, different from the first range of frequencies. A reader/writer mechanism associated with each of the environments generates a first communication signal at the first range of frequencies and a second communication signal at the second range of frequencies. A control logic having a memory is coupled to the first and second antennas for processing the first and second communication signals and automatically generating a first or second response signal for receipt by the reader/writer mechanism via the first and second antennas, respectively.

REFERENCES:
patent: 4794470 (1988-12-01), Lauffenburger et al.
patent: 5321395 (1994-06-01), Van Santbrink
patent: 5414412 (1995-05-01), Lian
patent: 5565858 (1996-10-01), Guthrie

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