RFID DEVICES USING METAMATERIAL ANTENNAS

• US 20130043309A1
• Filed: 08/17/2011
• Published: 02/21/2013
• Est. Priority Date: 08/17/2011
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Qu, Huyu, Wang, Ynjiun Paul, Feng, Chen
• Granted Patent: US 8,596,533 B2
• Time in Patent Office: Days
• US Class Current: 235/440
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 15/0086 said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials

Abstract

An EIR terminal can comprise a microprocessor, a memory communicatively coupled to the microprocessor, and a radio frequency identifier (RFID) reading device including an antenna having a composite right- and left-handed (CRLH) structure. The antenna can comprise one or more spatially separated conductive cell patches mounted on a dielectric substrate, a feed pad mounted on the dielectric substrate, one or more conductive feed lines connected to the feed pad, and one or more ground planes mounted on the dielectric substrate. One or more conductive feed lines can be spatially separated from one or more conductive cell patches. One or more conductive cell patches can be connected by one or more vias to one or more conductive via lines.

Claims

1. An encoded information reading (EIR) terminal comprising:

a microprocessor;

a memory communicatively coupled to said microprocessor;

a radio frequency identifier (RFID) reading device, said RFID reading device configured to perform at least one of;

outputting raw message data containing an encoded message and outputting decoded message data corresponding to an encoded message;

wherein said RFID reading device comprises an antenna having a composite right- and left-handed (CRLH) structure;

wherein said antenna comprises one or more spatially separated conductive cell patches mounted on a dielectric substrate, a feed pad mounted on said dielectric substrate, one or more conductive feed lines connected to said feed pad, and one or more ground planes mounted on said dielectric substrate;

wherein said one or more conductive feed lines are spatially separated from said one or more conductive cell patches; and

wherein said one or more conductive cell patches are connected by one or more vias to one or more conductive via lines.

2. The EIR terminal of claim 1, further comprising an EIR device selected from the group consisting of:

a bar code reading device and a card reading device, said EIR device configured to perform at least one of;

outputting raw message data containing an encoded message and outputting decoded message data corresponding to an encoded message.

3. The EIR terminal of claim 1, wherein at least one of said one or more conductive via lines comprises a via line tuner.

4. The EIR terminal of claim 1, wherein at least one of said one or more conductive feed lines comprises a feed line tuner.

5. The EIR terminal of claim 1, comprising two or more ground planes;

wherein at least two of said two or more ground planes are disposed on opposite surfaces of said dialectic substrate.

6. The EIR terminal of claim 1, wherein said via line tuner is configured to adjust a resonant frequency of said antenna.

7. The EIR terminal of claim 1, wherein said feed line tuner is configured to adjust a resonant frequency of said antenna.

8. The EIR terminal of claim 1, wherein said dielectric substrate has a folded plane form factor.

9. The EIR terminal of claim 1, wherein said dielectric substrate is provided by a printed circuit board.

10. The EIR terminal of claim 1, wherein said antenna is configured to support one or more frequency bands.

11. The EIR terminal of claim 1, wherein at least one of said conductive cell patches has one of:

a rectangular shape, a triangular shape, a circular shape.

12. The EIR terminal of claim 1, wherein said dielectric substrate has a form factor selected from the group consisting of:

a curved plane, a folded plane, a 3D surface.

13. The EIR terminal of claim 1, wherein said feed pad is electrically coupled to a coaxial cable connector.

14. The EIR terminal of claim 1, wherein said feed pad is electrically coupled to a twisted cable connector.