Shielded, closely spaced transmit-receiver antennas for...

H - Electricity – 01 – Q

Patent

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Details

351/11, 351/47,

H01Q 7/04 (2006.01) G08B 13/24 (2006.01)

Patent

CA 1219948

Abstract of Disclosure A shielded, closely spaced transmit-receiver system for use in an electronic article surveillance system is disclosed wherein at least one of the antennas is provided with at least two twisted loops lying in a common plane each loop being twisted 180° to be in phase opposition with the adjacent loop and wherein both antennas are substantially enclosed by a conductive shield having a discontinuity in an outer portion enclosing each of the twisted loops.

455510

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