05142292 is referenced by 131 patents and cites 13 patents.

An antenna for transmitting electromagnetic energy for deactivating a resonant tag circuit of an electronic article surveillance tag without regard to the orientation of the tag while minimizing far field radiation. The antenna includes a substantially planar dielectric substrate having a first side and a second side. The antenna also includes four substantially coplanar conductive loops on the first side of the dielectric substrate. The conductive loops are arranged in a two-by-two sequence and connected in series such that current flowing through any one of the conductive loops is out of phase with respect to current flowing in each adjacent conductive loop. The antenna also includes a ground trace on the second side of the substrate.

Title
Coplanar multiple loop antenna for electronic article surveillance systems
Application Number
7/740278
Publication Number
5142292
Application Date
August 5, 1991
Publication Date
August 25, 1992
Inventor
Luke C Chang
West Deptford
NJ, US
Agent
Panitch Schwarze Jacobs & Nadel
Assignee
Checkpoint Systems
NJ, US
IPC
H01Q 11/12
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