Hand held RFID reader with dipole antenna

• US 7,298,251 B2
• Filed: 01/07/2005
• Issued: 11/20/2007
• Est. Priority Date: 01/07/2005
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Meyers, David W., Becker, Robert C., Carlson, Douglas R.
• Primary Examiner(s): NGUYEN, PHUNG
• Application Number:
  US11/031,693
• Publication Number:
  US 20060164251A1
• Time in Patent Office: 1,047 Days
• Field of Search: 340/572.7, 340/505, 340/10.1, 340/10.52, 340/825.69, 343/793, 343/830, 235/492, 235/450, 235/472.1
• US Class Current: 340/505
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10346 the antenna being of the far field type, e.g. HF types or dipoles
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners

Abstract

A hand held Radio Frequency Identification (RFID) reader is provided. The reader includes a housing having a perimeter around an inner edge. The reader also includes a full-sized dipole antenna including two antenna elements coupled by a balun transformer. The antenna has nearly a unity gain over a range of angles. The reader also includes a transceiver, coupled to the dipole antenna by a suitable cable, the transceiver adapted to send and receive signals. The reader further includes a processor for processing signals received at the antenna. The first and the second antenna segments of the dipole antenna are wrapped along the perimeter around the inner edge of the housing.

Claims

1. A hand held Radio Frequency Identification (RFID) reader comprising:

a housing having a perimeter around an inner edge;

a full-sized dipole antenna including two antenna elements coupled by a balun transformer;

a transceiver, coupled to the dipole antenna by a suitable cable, the transceiver adapted to send and receive signals;

a processor;

a memory;

a display adapted to display a plurality of RFID tag information;

wherein the display is coupled to the processor and the memory; and

wherein the first and the second antenna segments of the dipole antenna are wrapped along the perimeter around the inner edge of the housing.

2. The hand held Radio Frequency Identification (RFID) reader of claim 1, further comprising an interface module coupled to the transceiver and adapted to communicate the plurality of RFID tag information to the display.

3. The hand held Radio Frequency Identification (RFID) reader of claim 1, wherein the elements of the full-sized dipole antenna are of equal lengths.

4. The hand held Radio Frequency Identification (RFID) reader of claim 1, wherein the antenna elements are coupled to a balun.

5. The hand held Radio Frequency Identification (RFID) reader of claim 4, wherein the balun is mounted onto the housing.

6. The hand held Radio Frequency Identification (RFID) reader of claim 1, farther comprising:

a key pad adapted to program the hand held RFID reader.

7. A Radio Frequency Identification (RFID) system comprising:

a plurality of RFID tags, wherein each of the RFID tags is adapted to transmit a RFID tag signal; and

at least one hand held RFID reader adapted to receive the plurality of RFID tag signals,

wherein the hand held RFID reader includes;

a full-sized dipole antenna including two antenna elements coupled together at one end;

a transceiver, coupled to the dipole antenna by a suitable cable, the transceiver adapted to send and receive signals;

a processor;

a memory;

a display screen adapted to display a plurality of RFID tag information;

wherein the display is coupled to the processor and the memory; and

wherein the antenna elements of the dipole antenna are wrapped along the perimeter around the inner edge of the housing.

8. The system of claim 7, further comprising an interface module coupled to the transceiver and adapted to communicate the plurality of RFID tag information to the display.

9. The system of claim 7, wherein the two antenna elements of the dipole antenna are of equal lengths.

10. The system of claim 7, wherein the two antenna elements are coupled to a balun.

11. The system of claim 10, wherein the balun is mounted onto the housing.

12. The system of claim 7, wherein the hand held RFID reader further comprising:

a keypad adapted to provide user input to the hand held RFID reader.

13. A method of identifying objects, the method comprising:

transmitting RFID tag information;

receiving RFID tag information using a hand held RFID reader, wherein the hand held RFID reader includes a dipole antenna including two antenna elements coupled together at one end, wherein the antenna elements are wrapped along the perimeter around the inner edge of a housing;

processing the RFID tag information; and

displaying the RFID tag information on a display of the hand held RFID reader.

14. A method of manufacturing a hand held RFID reader, the method comprising:

forming a housing;

wrapping a first and a second antenna segment of a dipole antenna along the perimeter around the inner edge of the housing;

providing a transceiver adapted to send and receive signals;

providing a processor;

providing a memory; and

providing a display adapted to display a plurality of RFID tag information.

15. The method of manufacturing of claim 14, further comprising:

providing an interface module coupled to the transceiver and adapted to communicate the plurality of RFID tag information to the display.

16. A hand held Radio Frequency Identification (RFID) reader comprising:

a housing having a perimeter around an inner edge;

a full-sized dipole antenna including two antenna elements coupled by a balun transformer, wherein the antenna has nearly a unity gain over a range of angles;

a transceiver, coupled to the dipole antenna by a suitable cable, the transceiver adapted to send and receive signals;

a processor for processing signals received at the antenna; and

wherein the first and the second antenna segments of the dipole antenna are wrapped along the perimeter around the inner edge of the housing.