Surface mounting type antenna system

• US 5,818,398 A
• Filed: 03/25/1997
• Issued: 10/06/1998
• Est. Priority Date: 05/17/1995
• Status: Expired due to Term

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Shiroki, Koji, Mandai, Haruhumi, Asakura, Kenji, Tsuru, Teruhisa
• Primary Examiner(s): Le, Hoanganh T.
• Application Number:
  US08/823,828
• Time in Patent Office: 560 Days
• Field of Search: 343/895, 343/872, 343/873, 343/702
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 11/08 Helical antennas

Abstract

A surface mounting type antenna system 10 is formed by spirally winding a conductor 14 made of copper or copper alloy, with a power supply member 12 provided at one end of the conductor 14, the other end thereof being a free end 13, on the edge faces of a rectangular parallelepiped as a dielectric substrate 11 by printing, deposition, pasting or plating. The dielectric substrate 11 is prepared by stacking a plurality of layers of ceramics, resin or a combination of ceramics and resin. On the underside 111 of the dielectric substrate 11 lies a power supply terminal 15 to which the power supply member 12 of the conductor 14 is connected. The power supply terminal 15 is simultaneously used as a fixing terminal for securing the surface mounting type antenna system 10 to, for example, a mounting board. Moreover, the conductor 14 squarely intersecting the axis C of the conductor winding is rectangular in transverse cross section having a width of w and a length of l.

Claims

1. A surface mounting antenna system comprising:

a dielectric substrate having a surface and having at least a portion of the surface comprising a flat surface to be mounted on a mounting board;

a conductor disposed spirally on the surface of the dielectric substrate; and

a power supply terminal provided on a portion of the surface of said dielectric substrate for applying voltage to the conductor, the conductor having one end coupled to the power supply terminal and a second end left unconnected;

said dielectric substrate comprising a plurality of layers stacked on top of each other, the stacked layers establishing a direction normal to the stacked layers, the conductor disposed spirally on the surface of the dielectric substrate having a spiral axis extending perpendicular to the direction normal to the stacked layers.

2. A surface mounting antenna system as claimed in claim 1, further comprising:

a mounting board; and

a fixing terminal provided on a portion of the surface of said dielectric substrate for securing said dielectric substrate onto the surface of said mounting board.

3. A surface mounting antenna system as claimed in claim 2, wherein said conductor includes a portion disposed substantially perpendicularly with respect to a longitudinal axis of said dielectric substrate and said portion partly includes at least one linear portion in transverse cross section through the conductor perpendicular to the longitudinal axis.

4. A surface mounting antenna system as claimed in claim 1, wherein said conductor includes a portion disposed substantially perpendicularly with respect to a longitudinal axis of said dielectric substrate and said portion partly includes at least one linear portion in transverse cross section through the conductor perpendicular to the longitudinal axis.

5. A surface mounting antenna system as claimed in claim 1, wherein the conductor is disposed on the surface of the dielectric substrate in a groove disposed on the surface.

6. A helical antenna as claimed in claim 1, wherein said dielectric substrate has an internal surface extending in each of three dimensions and said conductor is disposed on said internal surface.

7. A surface mounting antenna system as claimed in claim 1, wherein said dielectric substrate is contained within a further outer dielectric material enclosing said dielectric substrate.

8. A surface mounting antenna system as claimed in claim 1, wherein said dielectric substrate comprises a plurality of layers of dielectric material.

9. A surface mounting antenna system as claimed in claim 8, wherein portions of the conductor are disposed on separate surfaces of respective ones of said layers of dielectric material joined together to form said dielectric substrate, with conductive through holes through the layers being provided connecting the portions of the conductor on said separate surfaces of different ones of said layers together to form said spirally disposed conductor.

10. A surface mounting antenna system as claimed in claim 1, wherein the dielectric substrate comprises a rectangular parallelopiped with said surface comprising six parallelopiped surfaces, the conductor being disposed on at least four surfaces of said rectangular parallelopiped.

11. A surface mounting antenna system as claimed in claim 1 wherein the conductor is formed by one of printing, deposition, pasting and plating.

12. A surface mounting antenna system as claimed in claim 1, wherein each turn of the conductor has a rectangular shape in transverse cross-section.

13. A surface mounting antenna system as claimed in claim 1 wherein each turn of the conductor has a track-shape in transverse cross-section.

14. A surface mounting antenna system as claimed in claim 1 wherein each turn of the conductor has a semicircular shape in transverse cross-section.

15. A surface mounting antenna system as claimed in claim 1, wherein different turns of the conductor have different shapes in transverse cross-section.

42. A surface mounting antenna system as claimed in claim 4, wherein said conductor includes a portion disposed substantially perpendicularly with respect to the longitudinal axis and said portion partly includes at least one linear portion in transverse cross section through the conductor perpendicular to the longitudinal axis.

16. A helical antenna comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

a conductor disposed spirally about and extending along a longitudinal axis of said dielectric substrate; and

a power supply member provided at one end of said conductor, the other end of said conductor being a free end;

wherein the sensitivity of the antenna to dominant and cross polarized waves is provided in at least two dimensions, said two dimensions comprising a direction of the longitudinal axis and a direction perpendicular to the longitudinal axis;

said dielectric substrate comprising a plurality of layers stacked on top of each other and establishing a direction normal to the stacked layers;

the conductor disposed spirally about and extending along the longitudinal axis of the dielectric substrate such that the longitudinal axis is perpendicular to the direction normal to the stacked layers.

17. A helical antenna as claimed in claim 16, wherein said conductor includes a portion disposed substantially perpendicularly with respect to the longitudinal axis and said portion partly includes at least a linear portion in transverse cross section through the conductor perpendicular to the longitudinal axis.

18. A helical antenna as in claim 17, wherein said conductor is provided on the surface of the dielectric substrate.

19. A helical antenna as claimed in claim 17, wherein said conductor is provided in a dielectric substrate.

20. A helical antenna as in claim 16, wherein said conductor is provided on the surface of the dielectric substrate.

21. A helical antenna as claimed in claim 20, wherein the conductor is disposed on the surface of the dielectric substrate in a groove disposed on the surface.

22. A helical antenna as claimed in claim 20, wherein said dielectric substrate has an internal surface extending in each of three dimensions and said conductor is disposed on said internal surface.

23. A helical antenna as claimed in claim 20, wherein said dielectric substrate is contained within a further outer dielectric material enclosing said dielectric substrate.

24. A helical antenna as claimed in claim 20, wherein said dielectric substrate comprises a plurality of layers of dielectric material.

25. A helical antenna as claimed in claim 24, wherein portions of the conductor are disposed on separate surfaces of respective ones of said layers of dielectric material joined together to form said dielectric substrate, with conductive through holes through the layers being provided connecting the portions of the conductor on said separate surfaces of different ones of said layers together to form said spirally disposed conductor.

26. A helical antenna as claimed in claim 20, wherein the dielectric substrate comprises a rectangular parallelopiped with said surface comprising six parallelopiped surfaces, said conductor being disposed on at least four surfaces of said rectangular parallelopiped.

27. A helical antenna as claimed in claim 20, wherein the conductor is formed by one of printing, deposition, pasting and plating.

28. A helical antenna as claimed in claim 16, wherein said conductor is provided in the dielectric substrate.

29. A helical antenna as claimed in claim 28, wherein said dielectric substrate comprises a plurality of layers of dielectric material.

30. A helical antenna as claimed in claim 29, wherein portions of the conductor are disposed on separate surfaces of respective ones of said layers of dielectric material joined together to form said dielectric substrate, with conductive through holes through the layers being provided connecting the portions of the conductor on said separate surfaces of different ones of said layers together to form said spirally disposed conductor.

31. A helical antenna as claimed in claim 28, wherein the conductor is formed by one of printing, deposition, pasting and plating.

32. A helical antenna as claimed in claim 28, wherein each turn of the conductor has a rectangular shape in transverse cross-section.

33. A helical antenna as claimed in claim 28, wherein each turn of the conductor has a track shape in transverse cross-section.

34. A helical antenna as claimed in claim 28, wherein each turn of the conductor has a semicircular shape in transverse cross-section.

35. A helical antenna as claimed in claim 28, wherein different turns of the conductor have a different shape in transverse cross-section.

36. A helical antenna as claimed in claim 16, wherein each turn of the conductor has a rectangular shape in transverse cross-section.

37. A helical antenna as claimed in claim 16, wherein each turn of the conductor has a track shape in transverse cross-section.

38. A helical antenna as claimed in claim 16, wherein each turn of the conductor has a semicircular shape in transverse cross-section.

39. A helical antenna as claimed in claim 16, wherein different turns of the conductor have a different shape in transverse cross-section.

40. A surface mounting antenna system, comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

a conductor disposed spirally in the dielectric substrate; and

a power supply terminal provided on a portion of the surface of said dielectric substrate for applying voltage to the conductor, the conductor having one end coupled to the power supply terminal and a second end left unconnected;

the dielectric substrate comprising a plurality of layers stacked on top of each other and defining a direction normal to the stacked layers;

the conductor disposed spirally in the dielectric substrate having a spiral axis extending perpendicular to the direction normal to the stacked layers.

41. A surface mounting type antenna system as claimed in claim 40, further comprising:

a mounting board; and

a fixing terminal provided on a portion of the surface of said dielectric substrate for securing said dielectric substrate onto the surface of said mounting board.

43. A surface mounting antenna system as claimed in claim 40, wherein said conductor includes a portion disposed substantially perpendicularly with respect to the longitudinal axis and said portion partly includes at least one linear portion in transverse cross section through the conductor perpendicular to the longitudinal axis.

44. A surface mounting antenna system as claimed in claim 40, wherein said dielectric substrate comprises a plurality of layers of dielectric material.

45. A surface mounting antenna system as claimed in claim 44, wherein portions of the conductor are disposed on separate surfaces of respective ones of said layers of dielectric material joined together to form said dielectric substrate, with conductive through holes through the layers being provided connecting the portions of the conductor on said separate surfaces of different ones of said layers together to form said spirally disposed conductor.

46. A surface mounting antenna system as claimed in claim 40, wherein the conductor is formed by one of printing, deposition, pasting and plating.

47. A surface mounting antenna system as claimed in claim 40, wherein each turn of the conductor has a rectangular shape in transverse cross-section.

48. A surface mounting antenna system as claimed in claim 40, wherein each turn of the conductor has a track shape in transverse cross-section.

49. A surface mounting antenna system as claimed in claim 40, wherein each turn of the conductor has a semicircular shape in transverse cross-section.

50. A surface mounting antenna system as claimed in claim 40, wherein different turns of the conductor have different shapes in transverse cross-section.

51. A helical antenna comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

a conductor disposed spirally about a longitudinal axis of said dielectric substrate; and

a power supply member provided at one end of said conductor, the other end of said conductor being a free end;

wherein the sensitivity of the antenna to dominant and cross polarized waves is provided in at least two dimensions, said two dimensions comprising a direction of a longitudinal axis and a direction perpendicular to the longitudinal axis;

the dielectric substrate comprising a plurality of layers stacked on top of each other, the layers being stacked so as to define a direction normal to the stacked layers;

the conductor disposed spirally about the longitudinal axis of the dielectric substrate such that the longitudinal axis is perpendicular to the direction normal to the stacked layers.

52. A surface mounting antenna system comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board and having a longitudinal axis;

said dielectric substrate comprising a plurality of layers stacked on top of each other;

a conductor disposed spirally about the longitudinal axis about the stacked layers of the dielectric substrate; and

a power supply terminal provided on a portion of the surface of said dielectric substrate for applying voltage to the conductor, the conductor having one end coupled to the power supply terminal and a second end left unconnected.

53. A helical antenna comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

said dielectric substrate comprising a plurality of layers stacked on top of each other;

a conductor disposed spirally about and extending along a longitudinal axis of said dielectric substrate; and

a power supply member provided at one end of said conductor, the other end of said conductor being a free end;

wherein the sensitivity of the antenna to dominant and cross polarized waves is provided in at least two dimensions, said two dimensions comprising a direction of the longitudinal axis and a direction perpendicular to the longitudinal axis.

54. A surface mounting antenna system, comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

the dielectric substrate comprising a plurality of layers stacked on top of each other;

a conductor disposed spirally in the dielectric substrate; and

a power supply terminal provided on a portion of the surface of said dielectric substrate for applying voltage to the conductor, the conductor having one end coupled to the power supply terminal and a second end left unconnected.

55. A helical antenna comprising:

a dielectric substrate having at least one flat surface to be mounted on a mounting board;

the dielectric substrate comprising a plurality of layers stacked on top of each other;

a conductor disposed spirally about a longitudinal axis of said dielectric substrate; and

a power supply member provided at one end of said conductor, the other end of said conductor being a free end;

wherein the sensitivity of the antenna to dominant and cross polarized waves is provided in at least two dimensions, said two dimensions comprising a direction of a longitudinal axis and a direction perpendicular to the longitudinal axis.