RF transponder with resonant crossover antenna coil

Details RF transponder with resonant crossover antenna coil RF transponder with resonant crossover antenna coil

1994-09-30

1996-07-30

Hajec, Donald T.

Registers

Records

Fluorescent, phosphorescent, radiation emitting

343895, G06K 1906

Patent

active

055413994

ABSTRACT:
An RF transponder couples the outer end of a coiled antenna winding to a transponder circuit located inside the winding by a lead line that crosses over the winding turns and is separated from the winding by a dielectric material. The width of the lead line is substantially greater than the antenna line width, yielding capacitances at the cross-over sites that establish a resonant frequency for communicating with the transponder circuit at a predetermined RF frequency. An optional discrete capacitor can also be used to boost the capacitance to a desired level. All of the transponder components are formed on one side of a flexible substrate, the opposite side of which is coated with an adhesive that is covered by a peel-off sheet, allowing the transponder to be affixed to packages as part of a package identification system.

REFERENCES:
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patent: 4567473 (1986-01-01), Lichtblau
patent: 4598276 (1986-07-01), Tait
patent: 4716259 (1987-12-01), Tokura et al.
patent: 4730188 (1988-03-01), Milheiser
patent: 4827395 (1989-05-01), Anders et al.
patent: 4962485 (1990-10-01), Kato et al.
patent: 5081445 (1992-01-01), Gill et al.
patent: 5108822 (1992-04-01), Imaichi et al.
patent: 5142270 (1992-08-01), Appalucci et al.
patent: 5214410 (1993-05-01), Verster
patent: 5430447 (1995-07-01), Meier

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