RFID UHF STRIPLINE ANTENNA-COUPLER
First Claim
1. A stripline antenna-coupler for a RFID enabled system having a transceiver, the antenna-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 antenna-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 first conductive strip being positioned at least partially between the first and second ground planes and configured to propagate a plurality of electromagnetic fields;
a second conductive strip being positioned at least partially between the first conductive strip and the second ground plane 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 the propagation of the plurality of electromagnetic fields from a side of each of the first and second conductive strips.
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Accused Products
Abstract
A stripline antenna-coupler for a RFID system is provided. The coupler is configured to communicate with a targeted transponder from among a group of multiple adjacent transponders. The coupler may include at least two conductive strips, at least one terminating load, a dielectric material, a first ground plane, and a second ground plane. Each of the conductive strips extends between the first and second ground planes and the dielectric material from an input end connected to a transceiver to a loaded end connected to the terminating load. The conductive strips may be configured to propagate electromagnetic fields concentrated in a near field region of the conductive strips in a direction generally perpendicular to the conductive strips to couple with a targeted transponder. The coupler may include an enclosure for directing the electromagnetic fields. The conductive strip may have a tapered or non-linear profile such as a modified bow-tie profile.
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Citations
20 Claims
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1. A stripline antenna-coupler for a RFID enabled system having a transceiver, the antenna-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 antenna-coupler comprising:
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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 first conductive strip being positioned at least partially between the first and second ground planes and configured to propagate a plurality of electromagnetic fields;
a second conductive strip being positioned at least partially between the first conductive strip and the second ground plane 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 the propagation of the plurality of electromagnetic fields from a side of each of the first and second conductive strips. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An RFID system for selectively communicating with a targeted transponder from among a group of multiple adjacent transponders, the RFID system comprising:
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a transponder conveyance system adapted to transport at least one targeted transponder from a group of multiple adjacent transponders through a transponder encoding region along a predetermined path; and
a antenna-coupler including a first conductive strip, a second conductive strip, a first ground plane, and a second ground plane, wherein each of the first and second conductive strips is positioned at least partially between the first and second ground planes and is configured to transmit and receive an electromagnetic field to and from the transponder encoding region for communicating with the targeted transponder. - View Dependent Claims (17, 18, 19, 20)
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Specification