Antenna structure for an electronic article surveillance system

Details Antenna structure for an electronic article surveillance system Antenna structure for an electronic article surveillance system

1988-12-30

1992-04-07

Wimer, Michael C.

Communications: radio wave antennas

Antennas

High frequency type loops

340572, 343842, 343867, H01Q 7040, G08B 13220

Patent

active

051032350

ABSTRACT:
The transmitting and/or receiving antenna of an electronic article surveillance system utilizes a paired-lead loop configuration. One lead forms the active loop.
The other lead forms a passive loop, which parallels and is mutually coupled to the active loop, but not conductively connected to it. This other lead is resistively loaded.
The passive loop of the receiving antenna can also be used to conduct signals between the receiver circuitry and the alarm reporting devices associated with the receiver.

REFERENCES:
patent: 2226687 (1940-12-01), Alford
patent: 2494198 (1950-01-01), Posthumus
patent: 4217591 (1980-08-01), Czerwinski
patent: 4229742 (1980-10-01), Rotunda
patent: 4308530 (1981-12-01), Kip et al.
patent: 4494120 (1985-01-01), Garay
patent: 4633250 (1986-12-01), Anderson, III et al.
patent: 4872018 (1989-10-01), Feltz et al.

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