RFID READING TERMINAL WITH DIRECTIONAL ANTENNA

• US 20130221098A1
• Filed: 02/23/2012
• Published: 08/29/2013
• Est. Priority Date: 02/23/2012
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Wang, Ynjiun Paul, Qu, Huyu
• Application Number:
  US13/403,191
• Publication Number:
  US 20130221098A1
• Time in Patent Office: Days
• US Class Current: 235/440
• CPC Class Codes: G06K 7/10089 the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision direction or location finding, such as triangulation techniques, G01S13/00
• CPC Class Codes: G06K 7/10346 the antenna being of the far field type, e.g. HF types or dipoles
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• 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

A radio frequency identifier (RFID) reading terminal can comprise a microprocessor, a memory, and an RFID reading device including a directional antenna. The RFID reading device can be configured to output raw message data containing an encoded message and/or output decoded message data corresponding to an encoded message. The RFID reading terminal can further comprise an aiming light source configured to emit aiming light, and at least one aiming lens configured to direct the aiming light onto a target to produce a visible aiming pattern at least partially contained within a projection onto the target of a coverage shape of the RF signal emitted by the directional antenna.

Claims

1. A radio frequency identifier (RFID) reading terminal comprising:

a microprocessor;

a memory;

an 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, said RFID reading device including a directional antenna;

an aiming light source configured to emit aiming light;

at least one aiming lens configured to direct said aiming light onto a target to produce a visible aiming pattern at least partially contained within a projection onto said target of a coverage shape of an RF signal emitted by said directional antenna, wherein said at least one aiming lens is configured to direct said aiming light onto said target to produce said visible aiming pattern fully contained within said projection onto said target of said coverage shape of said RF signal emitted by said directional antenna.

3. The RFID reading terminal of claim 1, wherein said at least one aiming lens is configured to direct said aiming light onto said target to produce said visible aiming pattern so that a central axis of said visible aiming pattern substantially coincides with a central axis of said projection onto said target of said coverage shape of said RF signal emitted by said directional antenna.

4. The RFID reading terminal of claim 1, wherein said at least one aiming lens is configured to direct said aiming light onto said target to produce said visible aiming pattern so that a center of said visible aiming pattern substantially coincides with a center of said projection of said coverage shape of said RF signal emitted by said directional antenna.

5. The RFID reading 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.

6. The RFID reading terminal of claim 1, further configured to activate said aiming light source responsive to a user interface action.

7. The RFID reading terminal of claim 1, wherein said aiming light source is provided by a laser diode.

8. The RFID reading terminal of claim 1, wherein said directional antenna is made of a material having a composite right- and left-handed (CRLH) structure.

9. The RFID reading terminal of claim 1, 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.

10. The RFID reading terminal of claim 9, wherein said antenna comprises two or more ground planes;

and

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

11. The RFID reading terminal of claim 9, wherein said dielectric substrate is provided by a printed circuit board.

12. The RFID reading terminal of claim 9, wherein at least one of said conductive cell patches has one of:

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

13. The RFID reading terminal of claim 9, wherein said dielectric substrate has a form factor selected from the group consisting of:

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

14. The RFID reading terminal of claim 9, wherein said feed pad is electrically coupled to one of:

a coaxial cable connector, a twisted cable connector.

2. (canceled)

15. A radio frequency identifier (RFID) reading terminal comprising:

a microprocessor;

a memory;

an 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, said RFID reading device including a directional antenna;

an aiming light source configured to emit aiming light; and

at least one aiming lens configured to direct said aiming light onto a target to produce a visible aiming pattern at least partially contained within a projection onto said target of a coverage shape of an RF signal emitted by said directional antenna, wherein said at least one aiming lens is configured to direct said aiming light onto said target to produce said visible aiming pattern so that a central axis of said visible aiming pattern substantially coincides with a central axis of said projection onto said target of said coverage shape of said RF signal emitted by said directional antenna.

16. The RFID reading terminal of claim 15, wherein said at least one aiming lens is configured to direct said aiming light onto said target to produce said visible aiming pattern fully contained within said projection onto said target of said coverage shape of said RF signal emitted by said directional antenna.

17. The RFID reading terminal of claim 15, wherein said at least one aiming lens originates the aiming light within said projection at an origination of said projection.