Identification system with vector phase angle detection

Details Identification system with vector phase angle detection Identification system with vector phase angle detection

1984-08-03

1987-03-31

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082569, 34082572, 342 44, H04Q 100

Patent

active

046546588

ABSTRACT:
An electronic identification and recognition system which detects vector phase angle changes. The recognition section radiates power to the identification section. The phase angle of the current in the identifier antenna is determined by a clock and memory system which varies the reactance of the identifier antenna circuit. The change in reactance affects the phase angle of the voltage within the reader antenna. The phase angle changes are detected and recorded by the recognition section such that the internal code of the identifier section is determined.

REFERENCES:
patent: 2927321 (1960-03-01), Harris
patent: 3299424 (1967-06-01), Vinding
patent: 3806905 (1974-04-01), Strenglein
patent: 3859624 (1975-01-01), Kriofsky et al.
patent: 4209783 (1980-06-01), Ohyama et al.
patent: 4333072 (1982-06-01), Beigel
patent: 4388524 (1983-06-01), Walton
patent: 4517563 (1985-05-01), Diamant

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