Folded RF marker for electronic article surveillance systems

Details Folded RF marker for electronic article surveillance systems Folded RF marker for electronic article surveillance systems

1984-11-09

1987-04-14

Lieberman, Eli

Communications: radio wave antennas

Antennas

Spiral or helical type

540572, H01Q 136, H03H 701

Patent

active

046582649

ABSTRACT:
A tuned resonant circuit including inductive and capacitive components useful as a marker in electronic article surveillance systems, comprising a laminate of a dielectric sheet having a conductive layer on one side configured to form at least one multi-turn inductive spiral. The sheet is folded back upon itself at a fold line which is precisely defined by spaced apart areas of the conductive layer such that desired portions of the layer become precisely and uniformly juxtaposed.

REFERENCES:
patent: 3810147 (1974-05-01), Lichtblau
patent: 3863244 (1975-01-01), Lichtblau
patent: 3913219 (1975-10-01), Lichtblau
patent: 3967161 (1976-06-01), Lichtblau
patent: 4021705 (1977-05-01), Lichtblau
patent: 4369557 (1983-01-01), Vandebult

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