Coupled transponder and antenna system and method

• US 20040016487A1
• Filed: 12/16/2002
• Published: 01/29/2004
• Est. Priority Date: 07/24/2002
• Status: Abandoned Application

• Current Assignee: David Allan Johnson, Joseph Michael Letkomiller, Richard Stephen Pollack
• Original Assignee: David Allan Johnson, Joseph Michael Letkomiller, Richard Stephen Pollack
• Inventors: Letkomiller, Joseph Michael, Pollack, Richard Stephen, Johnson, David Allan
• Application Number:
  US10/320,794
• Publication Number:
  US 20040016487A1
• Time in Patent Office: Days
• US Class Current: 152/152.1
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0493 for attachment on the tyre
• CPC Class Codes: G06K 19/07764 the adhering arrangement making the record carrier attachable to a tire tire temperature or pressur control arrangements, see B60C23/00
• CPC Class Codes: H01Q 1/2241 used in or for vehicle tyres

Abstract

Annular apparatus comprises a toroidal body composed of a material having high electromagnetic permeability and the body a through bore; an electrical device coupled to the toroidal body; and a loop antenna disposed to extend through the through bore in direct magnetic coupled relationship with the toroidal body. The loop antenna is in a mechanically de-coupled relationship with the toroidal body and lies substantially in a first plane that intersects the toroidal body opening at a right angle. In one embodiment, the electrical device comprises a transponder for monitoring cavity parameters in a pneumatic tire.

Claims

1. An apparatus comprising:

a toroidal body composed of a material having high electromagnetic permeability and the body having a through bore,

an electrical device coupled to the toroidal body,

a loop antenna disposed to extend through the through bore in direct magnetic coupled relationship with the toroidal body.

2. An apparatus according to claim 1, wherein the loop antenna is in mechanically de-coupled relationship with the toroidal body.

3. An apparatus according to claim 1 wherein the loop antenna lies substantially in a first plane that intersects the toroidal body opening at a substantially right angle.

4. An apparatus according to claim 1, wherein the electrical device comprises a transponder.

5. An apparatus according to claim 1, wherein the loop antenna comprises at least one wire.

6. An annular apparatus comprising:

a toroidal body composed of a material having high electromagnetic permeability and the body having a through bore;

a transponder coupled to the toroidal body;

a loop antenna disposed to extend through the through bore in a magnetically coupled relationship and a mechanically de-coupled relationship with the toroidal body.

7. An apparatus according to claim 6, wherein the loop antenna lies substantially in a first plane that intersects the toroidal body opening at a substantially right angle.

8. An apparatus according to claim 6, wherein the loop antenna comprises at least one wire formed into a substantially sinusoidal wave conformation.

9. An apparatus according to claim 6, wherein the transponder and the toroidal body reside within a common housing.

10. In an apparatus of the type comprising a toroidal body composed of material having high electromagnetic permeability and the body having a through bore;

a transponder coupled to the toroidal body, and a loop antenna magnetically coupled to the transponder through the toroidal body, characterized in that the loop antenna extends through the central opening in a non-contacting and mechanically decoupled relationship with the toroidal body.

11. An apparatus according to claim 10, wherein the loop antenna lies within a first plane normally disposed to the toroidal body through bore.

12. An apparatus according to claim 10, wherein the loop antenna is in direct magnetically coupled relationship and mechanically de-coupled relationship with the toroidal body.

13. An apparatus according to claim 10, further characterized as including a housing in which the toroidal body and the transponder commonly reside.

14. A method of associating a loop antenna with an electronic device through a toroidal body composed of a material of high elector-magnetic permeability and the body having a through bore, comprising the steps of:

positioning the loop antenna to project through the through bore in non-contacting and mechanically decoupled relationship with the toroidal body,

establishing a direct magnetic coupling between the loop antenna and the toroidal body, and coupling the electronic device to the antenna through the toroidal body.

15. A method as set forth in claim 14, further comprising the step of orienting the loop antenna to lie within a first plane normally disposed to the toroidal body through bore.

16. A method according to claim 14, further comprising the step of locating the toroidal body and the electronic device within a common housing.

17. A method of associating a loop antenna with an electronic device through a toroidal body composed of a material of high electromagnetic permeability and the body having a central opening, comprising the steps of:

establishing a magnetic coupling between the loop antenna and the toroidal body;

coupling the electronic device to the antenna through the toroidal body;

embedding at least a portion of the antenna loop and at least a portion of the electronic device in an electrically non-conductive encapsulant material to maintain the antenna loop and the toroidal body in a specified orientation.

18. A method according to claim 17, further comprising the step of extending the antenna through the toroidal body through bore in a mechanically decoupled relationship therewith.

19. A method according to claim 18, further comprising the steps of:

positioning the toroidal body in an orientation in which the antenna intersects the, through bore at substantially a right angle; and

employing the encapsulant material to maintain the toroidal body in said orientation.

20. A method according to claim 17, further comprising the step of employing the encapsulant material to render the toroidal body and the electronic device unitarily transportable.