EAS system loop antenna having three loops of different area

Details EAS system loop antenna having three loops of different area EAS system loop antenna having three loops of different area

1992-10-28

1995-04-04

Hajec, Donald

Communications: radio wave antennas

Antennas

High frequency type loops

343741, 340572, H01Q 1112

Patent

active

054041473

ABSTRACT:
An EAS system in which a transmitter alternately drives first and second antennas with the same coded message signal in its entirety. The antennas, in turn, transmit first and second signals each containing the coded message signal into respective first and second partially overlapping parts of an interrogation zone. Also disclosed is an antenna structure comprised of a plurality of loops extending one after the other and successive ones of which are of opposite phase. One of the loops circumscribes an area which is smaller than each of the other loops to realize reduced coupling to adjacent structures.

REFERENCES:
patent: 4135183 (1979-01-01), Heltemes
patent: 4243980 (1981-01-01), Lichtblau
patent: 4251808 (1981-02-01), Lichtblau
patent: 4260990 (1981-04-01), Lichtblau
patent: 4686513 (1987-08-01), Farrar et al.
patent: 4751516 (1988-06-01), Lichtblau
patent: 4845509 (1989-07-01), Asbrink
patent: 5061941 (1991-10-01), Lizzi et al.

Affiliated with

Also associated with

Rating

EAS system loop antenna having three loops of different area does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with EAS system loop antenna having three loops of different area, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and EAS system loop antenna having three loops of different area will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2382750