MINIATURE ANTENNA HAVING A VOLUMETRIC STRUCTURE

• US 20090167612A1
• Filed: 02/02/2009
• Published: 07/02/2009
• Est. Priority Date: 02/19/2003
• Status: Active Grant

• Current Assignee: Fractus SA
• Original Assignee: Fractus SA
• Inventors: Baliarda, Carles Puente, Anguera-Pros, Jaume, Ortigosa-Vallejo, Juan Ignacio, Soler-Castany, Jordi
• Granted Patent: US 8,149,171 B2
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• 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 11/14 with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effect H01Q11/20 takes precedence
• CPC Class Codes: H01Q 11/16 in which the selected sections are collinear
• CPC Class Codes: H01Q 11/18 in which the selected sections are parallelly spaced
• CPC Class Codes: H01Q 15/0093 having a fractal shape
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A miniature antenna includes a radiating arm that defines a grid dimension curve. In one embodiment, the radiating arm includes a planar portion and at least one extruded portion. The planar portion of the radiating arm defines the grid dimension curve. The extruded portion of the radiating arm extends from the planar portion of the radiating arm to define a three-dimensional structure. In one embodiment, the miniature antenna includes a first radiating arm that defines a first grid dimension curve within a first plane and a second radiating arm that defines a second grid dimension curve within a second plane. In one embodiment, the miniature antenna includes a radiating arm that forms a non-planar structure.

Claims

1. A miniature antenna comprising:

a radiating arm that defines a grid dimension curve within a plane of the antenna;

the radiating arm having a planar portion that defines the grid dimension curve; and

the radiating arm further having at least one extruded portion extending from the planar portion to define a three-dimensional structure.

2. The miniature antenna of claim 1, wherein the grid dimension curve defines a space-filling curve.

3. The miniature antenna of claim 1, wherein the grid dimension curve has a grid dimension greater than at least one of the following values:

1.2, 1.5, 1.65, and 1.9.

4. The miniature antenna of claim 1, wherein the radiating arm includes a feeding point to couple the antenna with a transmission medium.

5. The miniature antenna of claim 4, wherein the feeding point is located on the planar portion of the radiating arm.

6. The miniature antenna of claim 4, wherein the feeding point is located on the extruded portion of the radiating arm.

7. The miniature antenna of claim 1, wherein the radiating arm is coupled to a ground potential.

8. The miniature antenna of any of claim 1, wherein the extruded portion is located along a section of the planar portion having a high current density relative to other sections of the planar portion.

9. A miniature antenna comprising:

a first radiating arm that defines a first grid dimension curve within a first plane; and

a second radiating arm that defines a second grid dimension curve within a second plane.

10. The miniature antenna of claim 9, wherein the first and second grid dimension curves each define a space-filling curve.

11. The miniature antenna of claim 9, wherein the first and second grid dimension curves each have a grid dimension greater than at least one of the following values:

1.2, 1.5, 1.65 and 1.9.

12. The miniature antenna of claim 9, wherein at least one of the radiating arms includes a feeding point to coupled the antenna to a transmission medium.

13. The miniature antenna of claim 9, wherein:

the first radiating arm includes a first dielectric substrate and the first grid dimension curve is defined by a first conductor attached to the first dielectric substrate; and

the second radiating arm includes a second dielectric substrate and the second grid dimension curve is defined by a second conductor attached to the second dielectric substrate.

14. The miniature antenna of claim 12, wherein the first radiating arm is an active radiating arm that includes the feeding point and the second radiating arm is a parasitic radiating arm that is coupled to a ground potential.

15. The miniature antenna of claim 14, wherein the parasitic radiating arm is a solid conductor that defines a slot, and wherein the slot in the parasitic radiating arm defines the second grid dimension curve.

16. The miniature antenna of claim 14, wherein the first radiating arm is electromagnetically coupled to the second radiating arm.

17. A miniature antenna comprising:

a radiating arm that defines at least one grid dimension curve;

the radiating arm forming a non-planar structure; and

the radiating arm including a feeding point to coupled the antenna to a transmission medium.

18. The miniature antenna of claim 17, wherein the grid dimension curve defines a space-filling curve.

19. The miniature antenna of claim 17, wherein the grid dimension curve has a grid dimension greater than at least one of the following values:

1.2, 1.5, 1.65 and 1.9.

20. The miniature antenna of claim 17, wherein the radiating arm forms a cylindrical structure.