Multilevel antennae

• US 8,009,111 B2
• Filed: 03/10/2009
• Issued: 08/30/2011
• Est. Priority Date: 09/20/1999
• Status: Expired due to Fees

• Current Assignee: Fractus SA
• Original Assignee: Fractus SA
• Inventors: Castany, Jordi Soler, Borau, Carmen Borja, Pros, Jaume Anguera, Baliarda, Carles Puente
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US12/400,888
• Publication Number:
  US 20090167625A1
• Time in Patent Office: 903 Days
• Field of Search: 343/700, 343/702, 343/829, 343/846
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• 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 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 5/10 Resonant antennas
• CPC Class Codes: H01Q 5/20 characterised by the operating wavebands
• CPC Class Codes: H01Q 5/307 Individual or coupled radiating elements, each element being fed in an unspecified way
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/065 Microstrip dipole antennas patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An apparatus including a wireless communications device has an internal antenna system located within the wireless communications device. The internal antenna system includes a passive antenna set comprising at least one antenna element having at least one multilevel structure, a feeding point to the at least one antenna element and a ground plane. The feeding point and a point on the ground plane define an input/output port for said passive antenna set. The passive antenna set provides a similar impedance level and radiation pattern at two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels. The selected channels are selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands.

Claims

1. An apparatus comprising:

a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set capable of operating in two or more frequency bands;

wherein said passive antenna set comprises at least one antenna element, a feeding point to said antenna element, and a ground plane;

wherein said at least one antenna element comprises a structure including at least two levels of detail, a first level of detail for an overall structure defined by a plurality of generally identifiable geometric elements and a second level of detail defined by a subset of the plurality of geometric elements forming said overall structure;

wherein said structure does not define a self-similar fractal structure;

wherein at least one of either a perimeter of contact or an area of overlap between said geometric elements is only a fraction of a total perimeter or a total area of the geometric elements, respectively, for a majority of said geometric elements such that it is possible to generally identify the majority of said plurality of geometric elements within said structure;

wherein said plurality of generally identifiable geometric elements are electromagnetically coupled to each other such that said at least one antenna element is not composed of a plurality of substantially isolated single band antenna elements, each of said single band antenna elements operating in one of said two or more frequency bands;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at said two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands.

2. An apparatus, as set forth in claim 1, wherein said at least one antenna element is smaller than a multiband antenna element operating in said two or more frequency bands obtained by grouping a plurality of substantially isolated single band antenna elements.

3. An apparatus, as set forth in claim 1, wherein the position of said two or more frequency bands can be selected independently.

4. An apparatus, as set forth in claim 1, wherein the internal antenna system further includes a matching network connected to said input/output port.

5. An apparatus, as set forth in claim 1, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

6. An apparatus, as set forth in claim 1, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

7. An apparatus, as set forth in claim 1, wherein the internal antenna system provides at least five frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least five frequency bands.

8. An apparatus, as set forth in claim 1, wherein said internal antenna system is a patch antenna.

9. An apparatus, as set forth in claim 1, wherein said internal antenna system is a monopole antenna.

10. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular phone service.

11. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 1850-1990 MHz frequency range.

12. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 2110-2155 MHz frequency range.

13. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular phone service in a 1710-1755 and in a 2110-2155 MHz frequency range.

14. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one GSM service.

15. An apparatus, as set forth in claim 1, wherein said apparatus provides at least two cellular phone services.

16. An apparatus, as set forth in claim 1, wherein said apparatus provides at least at three frequency bands and operates at least two cellular phone services.

17. An apparatus comprising:

a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set capable of operating in two or more frequency bands;

wherein said passive antenna set comprises at least one antenna element, a feeding point to said antenna element, and a ground plane;

wherein said at least one antenna element comprises a structure including a generally identifiable non-convex geometric element, wherein said non-convex geometric element comprises a plurality of convex geometric elements defining a finer level of detail;

wherein said structure does not define a self-similar fractal structure;

wherein said non-convex geometric element shapes the electric currents on the at least one antenna element associated with a lowest frequency band of said two or more frequency bands, while at least a subset of said plurality of convex geometric elements shapes the electric currents on the at least one antenna element associated with at least one of the higher frequency bands of said two or more frequency bands,

wherein said plurality of convex geometric elements are electromagnetically coupled to each other such that said at least one antenna element is smaller than a multiband antenna element operating in said two or more frequency bands obtained by grouping a plurality of substantially isolated single band antenna elements;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at said two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within said two or more frequency bands.

18. An apparatus, as set forth in claim 17, wherein the position of said two or more frequency bands can be selected independently.

19. An apparatus, as set forth in claim 17, wherein the internal antenna system further includes a matching network connected to said input/output port.

20. An apparatus, as set forth in claim 17, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

21. An apparatus, as set forth in claim 17, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

22. An apparatus, as set forth in claim 17, wherein the internal antenna system provides at least five frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least five frequency bands.

23. An apparatus, as set forth in claim 17, wherein said internal antenna system is a patch antenna.

24. An apparatus, as set forth in claim 17, wherein said internal antenna system is a monopole antenna.

25. An apparatus, as set forth in claim 17, wherein said apparatus provides at least one cellular phone service.

26. An apparatus, as set forth in claim 17, wherein said apparatus provides at least one cellular service in a 1850-1990 MHz frequency range.

27. An apparatus, as set forth in claim 17, wherein said apparatus provides at least one cellular service in a 2110-2155 MHz frequency range.

28. An apparatus, as set forth in claim 17, wherein said apparatus provides at least one cellular phone service in a 1710-1755 and in a 2110-2155 MHz frequency range.

29. An apparatus, as set forth in claim 17, wherein said apparatus provides at least one GSM service.

30. An apparatus, as set forth in claim 17, wherein said apparatus provides at least two cellular phone services.

31. An apparatus, as set forth in claim 17, wherein said apparatus provides at least at three frequency bands and operates at least two cellular phone services.

32. An apparatus comprising:

a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set capable of operating in two or more frequency bands;

wherein said passive antenna set comprises at least one conductive radiating antenna element, a feeding point to said at least one conductive antenna element, and

a ground plane;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set;

wherein the at least one conductive radiating antenna element includes at least one structure comprising a plurality of electromagnetically coupled geometric elements grouped into at least a first portion and a second portion in which the second portion is located within the first portion, said first and second portions defining empty spaces in an overall structure of the at least one conductive radiating antenna element to provide at least two current paths through said antenna element, such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands;

wherein said at least one structure does not define a self-similar fractal structure; and

wherein at least one of a perimeter of contact or an area of overlap between each of said geometric elements is only a fraction of a total perimeter or a total area of each of said geometric elements, respectively, for a majority of said plurality of geometric elements such that said internal antenna system is physically smaller than a multiband antenna operating in said two or more frequency bands obtained by grouping a plurality of substantially isolated single band antenna elements.

33. An apparatus, as set forth in claim 32, wherein the position of said two or more frequency bands can be selected independently.

34. An apparatus, as set forth in claim 32, wherein the internal antenna system further includes a matching network connected to said input/output port.

35. An apparatus, as set forth in claim 32, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

36. An apparatus, as set forth in claim 32, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

37. An apparatus, as set forth in claim 32, wherein the internal antenna system provides at least five frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least five frequency bands.

38. An apparatus, as set forth in claim 32, wherein said internal antenna system is a patch antenna.

39. An apparatus, as set forth in claim 32, wherein said internal antenna system is a monopole antenna.

40. An apparatus, as set forth in claim 32, wherein said apparatus provides at least one cellular phone service.

41. An apparatus, as set forth in claim 32, wherein said apparatus provides at least one cellular service in a 1850-1990 MHz frequency range.

42. An apparatus, as set forth in claim 32, wherein said apparatus provides at least one cellular service in a 2110-2155 MHz frequency range.

43. An apparatus, as set forth in claim 32, wherein said apparatus provides at least one cellular phone service in a 1710-1755 and in a 2110-2155 MHz frequency range.

44. An apparatus, as set forth in claim 32, wherein said apparatus provides at least one GSM service.

45. An apparatus, as set forth in claim 32, wherein said apparatus provides at least two cellular phone services.

46. An apparatus, as set forth in claim 32, wherein said apparatus provides at least at three frequency bands and operates at least two cellular phone services.

47. An apparatus comprising:

a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set radiating at multiple different operating wavelengths;

wherein a first operating wavelength of said multiple different operating wavelengths corresponds to an operating wavelength of a first cellular telephone service and a second operating wavelength of said multiple different operating wavelengths corresponds to an operating wavelength of a second cellular telephone service;

wherein said passive antenna set comprises at least one antenna element, a feeding point to said antenna element, and a ground plane;

wherein said at least one antenna element comprises a structure including at least two levels of detail, a first level of detail for an overall structure defined by a plurality of generally identifiable geometric elements and a second level of detail defined by a subset of the plurality of geometric elements forming said overall structure;

wherein said structure does not define a self-similar fractal structure, such that the position of said first and second operating wavelengths can be selected independently;

wherein at least one of either a perimeter of contact or an area of overlap between said geometric elements is only a fraction of a total perimeter or a total area of the geometric elements, respectively, for a majority of said geometric elements such that it is possible to generally identify the majority of said plurality of geometric elements within said structure;

wherein said plurality of generally identifiable geometric elements are electromagnetically coupled to each other such that said at least one antenna element is not composed of a plurality of substantially isolated antenna elements, each of said isolated antenna elements operating in one of said multiple different operating wavelengths;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at said first and second operating wavelengths.

48. An apparatus, as set forth in claim 47, wherein the internal antenna system further includes a matching network connected to said input/output port.

49. An apparatus, as set forth in claim 47, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

50. An apparatus, as set forth in claim 47, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

51. An apparatus, as set forth in claim 47, wherein the internal antenna system provides at least five frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least five frequency bands.

52. An apparatus, as set forth in claim 47, wherein said internal antenna system is a patch antenna.

53. An apparatus, as set forth in claim 47, wherein said internal antenna system is a monopole antenna.

54. An apparatus, as set forth in claim 47, wherein the multiple different operating wavelengths include GSM 1800 and PCS 1900.

55. An apparatus, as set forth in claim 47, wherein the multiple different operating wavelengths include GSM 850 and GSM 900.

56. An apparatus, as set forth in claim 47, wherein the apparatus operates in a first frequency band at approximately 1800 MHz.

57. An apparatus, as set forth in claim 56, wherein the apparatus operates in a second frequency band at approximately 1900 MHz.

58. An apparatus, as set forth in claim 57, wherein the apparatus operates in a third frequency band at approximately 850 MHz.

59. An apparatus, as set forth in claim 57, wherein the apparatus operates in a third frequency band at approximately 900 MHz.

60. An apparatus, as set forth in claim 47, wherein the apparatus operates in a first frequency band at approximately 2100 MHz.

61. An apparatus, as set forth in claim 47, wherein the apparatus operates in a first frequency band at approximately 1800 MHz and in a second frequency band at approximately 1900 MHz.

62. An apparatus, as set forth in claim 47, wherein the apparatus operates in a first frequency band at approximately 850 MHz and in a second frequency band at approximately 900 MHz.

63. An apparatus, as set forth in claim 47, wherein the apparatus operates in a first frequency band at approximately 1900 MHz and in a second frequency band at approximately 2100 MHz.

64. An apparatus, as set forth in claim 47, wherein the internal antenna system is adapted to radiate across at least three cellular telephone service frequency bands.

65. An apparatus, as set forth in claim 64, wherein at least three of said cellular telephone service frequency bands are UMTS frequency bands.

66. An apparatus, as set forth in claim 64, wherein at least three of said cellular telephone service frequency bands are GSM 1800, PCS 1900, and UMTS.