Tunable antenna

• US 7,924,226 B2
• Filed: 09/01/2005
• Issued: 04/12/2011
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Fractus SA
• Original Assignee: Fractus SA
• Inventors: Soler Castany, Jordi, Puente Baliarda, Carles, Mumbru Forn, Jose
• Primary Examiner(s): Ho, Tan
• Application Number:
  US11/576,015
• Publication Number:
  US 20080062049A1
• Time in Patent Office: 2,049 Days
• Field of Search: 343/700.MS, 343/702, 343/895
• US Class Current: 343/700.0MS
• 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 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• 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

Abstract

The invention refers to an antenna comprising: a conducting trace (15, 20), said conducting trace (15, 20) defining a curve (1, 4, 5, 6, 6′, 6″, 8), said curve (1, 4, 5, 6, 6′, 6″, 8) including two or more feeding points (16a, 16b, 16c, 17, 18, 19), a portion of said curve (1, 4, 5, 6, 6′, 6″, 8) being shaped according a geometry selected from a group of geometries including a space-filling curve, a grid-dimension curve, a box-counting curve and a contour curve or the curve (1, 4, 5, 6, 6′, 6″, 8) or a portion of said curve having a shape of a multilevel structure. Further the invention refers to a related SMD component, an IC-package, a wireless device and a method for contacting an antenna.

Claims

1. An antenna comprising:

a conducting trace, said conducting trace defining a curve extending continuously from a first end to a second end, said curve including at least three feeding points, the at least three feeding points being each located at a different point on said curve,

wherein a first feeding point of the at least three feeding points is located at the first end of said curve, wherein a second feeding point of the at least three feeding points is located at a point between the first end and the second end of said curve, and

wherein at least a portion of said curve features a complex geometry, said complex geometry being selected from a group of geometries consisting of

a space-filling curve, a grid-dimension curve, a box-counting curve, a contour curve, and a curve having the shape of a multilevel structure.

2. The antenna according to claim 1, further comprising means for electrically contacting said conducting trace provided for at least one of the feeding points.

3. The antenna according to claim 1, wherein said conducting trace comprises a rigid piece.

4. The antenna according to claim 1, wherein said conducting trace comprises at least one material selected from the group of materials including metal, iron, steel, stainless steel, copper, aluminum, brass, silver, gold, alloy and conducting polymer.

5. The antenna according to claim 1, wherein said conducting trace is supported by a rigid backing.

6. The antenna according to claim 5, wherein said rigid backing comprises at least one dielectric material.

7. The antenna according to claim 1, wherein said antenna is provided in at least one conducting layer of a circuit board.

8. The antenna according to claim 1, wherein said antenna is prepared by a film process.

9. The antenna according to claim 1, wherein said conducting trace has at least one radiating arm.

10. The antenna according to claim 1, wherein the antenna comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth end, and wherein said second conducting trace is electromagnetically-coupled to said conducting trace.

11. The antenna according to claim 1, wherein the antenna comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth end and wherein said second curve includes at least one feeding point.

12. The antenna according to claim 1, wherein said conducting trace is coupled to another antenna structure.

13. The antenna according to claim 1, wherein at least part of said conducting trace is covered by an insulator.

14. The antenna according to claim 13, wherein said insulator is at least one selected from the group including:

ink, foil, paper, paint, plastic, a dielectric substrate, a PCB material, epoxy, FR4, deposited materials, LCP, glass fiber, ceramic, glass, and a semiconductor material.

15. The antenna according to claim 13, wherein said conducting trace is uncovered at said feeding points.

16. The antenna according to claim 1, wherein said conducting trace is provided on a circuit board together with an integrated circuit.

17. The antenna according to claim 16, wherein said integrated circuit is operably connected to said conducting trace.

18. The antenna according to claim 16, wherein said conducting trace is not covered by said integrated circuit.

19. The antenna according to claim 16, wherein said conducting trace is partially covered by said integrated circuit.

20. The antenna according to claim 19, wherein at least one of said feeding points of the conducting trace is covered by said integrated circuit.

21. The antenna according to claim 16, wherein said conducting trace is on at least one side next to said integrated circuit.

22. The antenna according to claim 1, wherein said antenna is at least one antenna selected from a group of antennae including:

a monopole, a dipole, a patch antenna, a slot antenna, a microstrip antenna, a coplanar antenna, a wound antenna, an aperture antenna, a loop antenna, an inverted F-antenna and an antenna array.

23. The antenna according to claim 1, wherein said feeding points are covered by a removable cover.

24. The antenna according to claim 1, wherein said conducting trace is contacted at least two feeding points by removable connections.

25. The antenna according to claim 1, wherein a diameter of the smallest sphere completely enclosing said conducting trace is less than ⅕

of the free space wavelength of a resonant frequency of the antenna.

26. An apparatus, comprising:

at least one antenna, and

a wireless device coupled to the at least one antenna,

wherein the at least one antenna comprises;

a conducting trace, said conducting trace defining a curve extending continuously from a first end to a second end, said curve including at least three feeding points, the at least three feeding points being each located at a different point on said curve,

wherein a first feeding point of the at least three feeding points is located at the first end of said curve, wherein a second feeding point of the at least three feeding points is located at a point between the first end and the second end of said curve, and

wherein at least a portion of said curve features a complex geometry, said complex geometry being selected from a group of geometries consisting of a space-filling curve, a grid-dimension curve, a box-counting curve, a contour curve, and a curve having the shape of a multilevel structure.

27. The apparatus according to claim 26, wherein said at least one antenna is mounted on a circuit board of said wireless device.

28. The apparatus according to claim 26, wherein said at least one antenna is provided on a conducting layer of a circuit board of said wireless device.

29. The apparatus according to claim 26, wherein said at least one antenna is embedded in an integrated circuit package that includes other parts of said wireless device.

30. The apparatus according to claim 26, wherein at least one of the feeding points of said antenna is electrically connected to another electric circuit of said wireless device.

31. The apparatus according to claim 26, wherein at least one connection between said antenna and other parts of said wireless device is removable.

32. The apparatus according to claim 26, further comprising at least one electrical switch coupling at least one feeding point of the antenna to an electrical circuit of said wireless device.

33. The apparatus according to claim 26, wherein energy is provided to the antenna at least two feeding points thereof at the same time.

34. The apparatus according to claim 26, wherein at least one feeding point is connected to ground of said wireless device.

35. The apparatus according to claim 26, wherein the at least one antenna comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth end, and wherein said conducting trace and the second conducting trace are connected to each other by an integrated circuit provided on a common circuit substrate as said antenna.

36. The apparatus according to claim 26, wherein a space is provided between said antenna and the member of said wireless device to which said antenna is mounted.

37. The apparatus according to claim 26, wherein said feeding points which are not electrically connected to the wireless device provide support to said antenna.

38. The apparatus according to claim 26, wherein said conducting trace is provided such that at least a part of said conducting trace is not overlaid by a ground plane of said wireless device.

39. The apparatus according to claim 26, wherein said wireless device is at least one selected from the group including:

a cellular phone, a handheld phone, a satellite phone, a multimedia terminal, a personal digital assistant (PDA), a portable music player, a radio, a digital camera, a USB dongle, a wireless headset, an ear phone, a hands-free kit, an electronic game, a remote control, an electric switch, a light switch, an alarm, a car kit, a computer card, a PCMCIA card, a sensor, a handset, a dongle, a computer interface, a computer mouse, a keyboard, a personal computer, an MP3 player, a portable DVD/CD player, a smoke detector, a switch, a motion sensor, a pressure sensor, a temperature sensor, a medical sensor, a meter, an alarm, a short/medium range wireless connectivity application, a Mini-PCI, a Notebook PC with WiFi module integrated, compact flash wireless cards, UART dongles, pocket PC with integrated WiFi, access points for hot-spots.

40. The apparatus according to claim 26, wherein said wireless device is configured to operate in at least one wireless communication system selected from the group including:

Bluetooth, 2.4 GHz Bluetooth, 2.4 GHz IEEE802.11b/g, 5 GHz IEEE802.11a, Hyperlan, IEEE802.11 (WiFi), ultra wide band (UWB), Wimax, ZigBee, ZigBee at 860 MHz, ZigBee at 915 MHz, GPS, GPS at 1.575 GHz, GPS at 1.227 GHz, Galileo, GSM-900, DCS-1800, UMTS, CDMA, DBA, WLAN, WLAN at 2.4 GHz-5 GHz, PCS1900, KPCS, WCDMA, DAB, 2.4-2.483 GHz band, and 2.471-2.497 GHz band.

41. The apparatus, comprising:

a surface mount device (SMD) component including at least three access ports,

a conducting trace defining a curve extending continuously from a first end to a second end, said conducting trace being connected to said access ports at least three points thereof, said at least three points being each located at a different point on said curve,

wherein a first access port of the at least three access ports is connected to a first point of the at least three points located at the first end of said curve, wherein a second access port of the at least three access ports is connected to a second point of the at least three points located at a point between the first end and the second end of said curve,

wherein at least a portion of said curve features a complex geometry, said complex geometry being selected from a group of geometries consisting of a space-filling geometry, a grid-dimension geometry, a box-counting geometry, a contour curve geometry, and the shape of a multilevel structure, and wherein said conducting trace defining defines an antenna element within said SMD component.

42. The apparatus according to claim 41, wherein at least one of the at least three access ports comprises means for electrically contacting the SMD component.

43. The apparatus according to claim 41, wherein said conducting trace comprises a rigid piece.

44. The apparatus according to claim 41, wherein said conducting trace is supported by a rigid backing.

45. The apparatus according to claim 44, wherein said rigid backing comprises at least one dielectric material.

46. The apparatus according to claim 41, wherein said antenna element is provided in at least one conducting layer of a circuit board.

47. The apparatus according to claim 41, wherein said antenna element is prepared by a film process.

48. The apparatus according to claim 41, wherein said conducting trace has at least one radiating arm.

49. The apparatus according to claim 41, wherein the apparatus comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth ends, and wherein said second conducting trace is electromagnetically coupled to said conducting trace.

50. The apparatus according to claim 41, wherein the SMD component includes at least one additional access port, wherein the apparatus comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth end, and wherein said second conducting trace is connected to the at least one additional access port at at least one point thereof.

51. The apparatus according to claim 41, wherein said conducting trace is coupled to another antenna structure.

52. The apparatus according to claim 41, wherein at least part of said conducting trace is covered by an insulator.

53. The apparatus according to claim 41, wherein said access ports are covered by a removable cover.

54. The apparatus according to claim 41, wherein said conducting trace is contacted at least two access ports by removable connections.

55. The apparatus according to claim 41, wherein a diameter of the smallest sphere completely enclosing said conducting trace is less than ⅕

of the free space wavelength of a resonant frequency of the antenna.

56. The apparatus of claim 41, further comprising a wireless device containing the at least one SMD component.

57. The apparatus according to claim 56, wherein said at least one SMD component is embedded in an integrated circuit package that includes other parts of said wireless device.

58. The apparatus according to claim 56, wherein the SMD component further comprises at least one access port electrically connected to other electric circuits of said wireless device.

59. The apparatus according to claim 56, further comprising at least one removable connection between said SMD component and other parts of said wireless device.

60. The apparatus according to claim 56, further comprising at least one electrical switch connecting at least one access port to electrical circuits of said wireless device.

61. The apparatus according to claim 56, wherein energy is provided to the antenna element within said SMD component at least two access ports at the same time.

62. The apparatus according to claim 56, wherein at least one access port is electrically connected to ground of said wireless device.

63. The apparatus according to claim 56, wherein the apparatus comprises a second conducting trace defining a second curve extending continuously from a third end to a fourth end, and wherein said conducting trace and the second conducting trace are connected to each other by an integrated circuit which is provided on the same circuit substrate as said SMD component.

64. The apparatus according to claim 56, wherein a space is provided between said SMD component and the member of said wireless device to which said SMD component is mounted.

65. The apparatus according to claim 56, wherein said access ports which are not electrically connected provide support to said SMD component.

66. The apparatus according to claim 56, wherein said conducting trace is provided such that at least a part of said conducting trace is not overlaid by a ground plane of said wireless device.

67. The apparatus according to claim 41, wherein said conducting trace is provided on a circuit board together with an integrated circuit.

68. The apparatus according to claim 67, wherein said integrated circuit is operably connected to said conducting trace.

69. The apparatus according to claim 67, wherein said conducting trace is not covered by said integrated circuit.

70. The apparatus according to claim 67, wherein said conducting trace is partially covered by said integrated circuit.

71. The apparatus according to claim 70, wherein at least one of said access ports is covered by said integrated circuit.

72. The apparatus according to claim 67, wherein said integrated circuit is provided in relation to said conducting trace in a way that said conducting trace is on at least one side next to said integrated circuit.

73. An apparatus, comprising:

an integrated circuit housed in an IC package, and

an antenna comprising a conducting trace also housed in the IC package, said conducting trace defining a curve extending continuously from a first end to a second end, at least a portion of said curve being shaped according to a complex geometry, said complex geometry selected from a group of geometries consisting of a space-filling curve, a grid-dimension curve, a box-counting curve, a contour curve, and a curve having the shape of a multilevel structure, said conducting trace including at least three points along said curve at which it can be accessed for feeding purposes, the at least three points being each located at a different point on said curve, a first point of the at least three points being located at the first end of said curve, a second point of the at least three points being located at a point between the first end and the second end of said curve.

74. The apparatus according to claim 73, wherein at least one of said points is accessible from the outside of said IC package through an electrical contact.

75. The apparatus according to claim 73, wherein at least one of said points is connected to the integrated circuit of said IC package, and wherein said connected points are not directly accessible from the outside of said IC package.

76. The apparatus according to claim 73, wherein, said conducting trace is supported by a rigid backing.

77. The apparatus according to claim 76, wherein said rigid backing comprises at least one dielectric material.

78. The apparatus according to claim 73, wherein said conducting trace is provided in at least one layer of a circuit board.

79. The apparatus according to claim 73, wherein said conducting trace is not covered by the integrated circuit of said IC package.

80. The apparatus according to claim 73, wherein said conducting trace is connected to ground of said IC package at least one feeding purposes point.

81. The apparatus according to claim 73, wherein at least a part of said conducting trace is covered by the integrated circuit of said IC package.

82. The apparatus according to claim 81, wherein at least one of said feeding purposes points is covered by said integrated circuit.

83. The apparatus according to claim 73, wherein said conducting trace is placed on at least one side next to the integrated circuit of said IC package.

84. The apparatus according to claim 73, wherein said conducting trace has at least one radiating arm.

85. The apparatus according to claim 73, wherein the antenna comprises a second conducting trace also housed in the IC package, wherein said second conducting trace defines a second curve extending continuously from a third end to a fourth end, and wherein said second conducting trace is electromagnetically coupled to said conducting trace.

86. The apparatus according to claim 73, wherein the antenna comprises a second conducting trace also housed in the IC package, wherein said second conducting trace defines a second curve extending continuously from a third end to a fourth end, wherein said second conducting trace includes at least one point along said second curve at which it can be accessed for feeding purposes.

87. The apparatus according to claim 73, wherein said conducting trace is coupled to another antenna structure.

88. The apparatus according to claim 73, wherein at least part of said conducting trace is covered by an insulator.

89. The apparatus according to claim 73, wherein the integrated circuit of said IC package is provided at a corner of said IC package.

90. The apparatus according to claim 73, wherein the integrated circuit of said IC package is provided on a side of said IC package between two adjacent corners of said IC package.

91. The apparatus according to claim 73, further comprising a metal frame provided within said IC package, the metal frame comprising at least one discontinuity on at least one side of said IC package.

92. The apparatus according to claim 73, wherein a diameter of the smallest sphere completely enclosing said conducting trace is less than ⅕

of the free space wavelength of a resonant frequency of the antenna.

93. The apparatus according to claim 73, wherein the integrated circuit of said IC package is operably connected to said conducting trace.

94. The apparatus of claim 73, further comprising a wireless device containing the IC-package.

95. The apparatus according to claim 94, wherein said at least one IC-package is mounted on a circuit board.

96. The apparatus according to claim 94, wherein at least one feeding purposes point of said IC-package is electrically connected to other electric circuits of said wireless device.

97. The apparatus according to claim 94, wherein at least one connection between said IC-package and other parts of said wireless device is removable.

98. The apparatus according to claim 94, further comprising at least one electrical switch connecting at least one feeding purposes point can be electrically connected to electrical circuits of said wireless device.

99. The apparatus according to claim 94, wherein energy is provided to the antenna within said IC package at least two feeding purposes points at the same time.

100. The apparatus according to claim 94, wherein at least one feeding purposes point is electrically connected to ground of said wireless device.

101. The apparatus according to claim 94, wherein the antenna comprises a second conducting trace also housed in the IC package, wherein said second conducting trace defines a second curve extending continuously from a third end to a fourth end, and wherein said conducting trace and the second conducting trace are connected to each other by the integrated circuit of said IC-package.

102. The apparatus according to claim 94, wherein a space is provided between said IC-package and the member of said wireless device to which said IC-package is mounted.

103. The apparatus according to claim 94, wherein said feeding purposes points which are not electrically connected provide support to said IC-package.

104. The apparatus according to claim 94, wherein said conducting trace is provided such that at least a part of said conducting trace is not overlaid by a ground plane of said wireless device.