Method of transporting radio frequency power to energize radio f

Communications: electrical – Condition responsive indicating system – Specific condition

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Details

340693, G08B 1314

Patent

active

058501819

ABSTRACT:
An apparatus and a method of transporting energy from a base station to energize a remote RF transponder having an energy store is described, comprising transporting power in pulses of frequencies chosen from a randomly ordered list of frequencies, wherein the time between pulses when little power is transmitted is less than the time taken for the remote transponder to deplete the energy store.

REFERENCES:
patent: 4566009 (1986-01-01), Hanni et al.
patent: 5109217 (1992-04-01), Sikarla et al.
patent: 5349332 (1994-09-01), Ferguson et al.
patent: 5438332 (1995-08-01), Adam et al.
patent: 5495229 (1996-02-01), Balch et al.

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