US 7,586,410 B2
	RFID UHF stripline coupler
Boris Y. Tsirline, Libertyville, Ill. (US); Karl Torchalski, Arlington Heights, Ill. (US); and Martin Andreas Karl Schwan, Chicago, Ill. (US)
Assigned to ZIH Corp., Hamilton (Bermuda)
Filed on Mar. 09, 2006, as Appl. No. 11/371,785.
Prior Publication US 2007/0216591 A1, Sep. 20, 2007
Int. Cl. G08B 13/14 (2006.01)

U.S. Cl. 340—572.1  [340/572.4; 340/572.7; 340/572.8; 340/539.1; 340/825.69; 340/825.72; 235/375; 235/432]

26 Claims

1. A stripline coupler for a RFID enabled system having a transceiver, the coupler being adapted to couple a transceiver with a targeted transponder in a transponder encoding region from among a group of multiple adjacent transponders, the coupler comprising: a first ground plane and a second ground plane spaced apart from each other; at least one connection between the first ground plane and the second ground plane for connecting the first ground plane to the second ground plane; and a conductive strip being positioned at least partially between the first and second ground planes and configured to propagate a plurality of electromagnetic fields; wherein the first ground plane, the second ground plane, and the at least one connection promote propagation of the plurality of electromagnetic fields from a side of the conductive strip; and wherein the propagation of the plurality of electromagnetic fields from the side of the conductive strip is in a direction generally perpendicular to a length of the conductive strip and generally parallel to the first and second ground planes for coupling with the targeted transponder in the transponder encoding region.