Compact antennas for ultra wide band applications

• US 20060114166A1
• Filed: 11/29/2004
• Published: 06/01/2006
• Est. Priority Date: 11/29/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Soliman, Samir S., Burke, Joseph Patrick, Mohammadian, Alireza Hormoz
• Granted Patent: US 7,158,089 B2
• Time in Patent Office: Days
• US Class Current: 343/795
• 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 9/28 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

Compact antennas for ultra wide band applications are disclosed. The compact antenna may be an elliptic dipole antenna with a poise and counterpoise both having an elliptical shape. A substrate may be used to support the poise and counterpoise with the substrate having a closed three-dimensional shape.

Claims

1. An elliptic dipole antenna, comprising:

a poise and counterpoise each having an elliptical shape; and

a substrate supporting the poise and counterpoise, the substrate having a closed three-dimensional shape.

2. The elliptic dipole antenna of claim 1 wherein each of the poise and counterpoise comprises an ellipse.

3. The elliptic dipole antenna of claim 1 wherein each of the poise and counterpoise comprises a half ellipse.

4. The elliptic dipole antenna of claim 3 wherein the poise further comprises a folded tip.

5. The elliptic dipole antenna of claim 1 wherein the substrate is cylindrical.

6. The elliptic dipole antenna of claim 1 wherein the substrate is rectangular.

7. The elliptic dipole antenna of claim 1 wherein the substrate comprises a flexible printed circuit board.

8. The elliptic dipole antenna of claim 1 wherein the substrate comprises polyimide film.

9. The elliptic dipole antenna of claim 1 wherein the poise and counterpoise are disposed on opposite sides of the substrate.

10. The elliptic dipole antenna of claim 9 further comprising a microstrip feed coupled to the poise.

11. The elliptic dipole antenna of claim 10 wherein the counterpoise includes a portion which provides a ground plane for the microstrip strip feed, and wherein the counterpoise further comprises two isolation gaps to separate said portion from the remainder of the counterpoise.

12. The elliptic dipole antenna of claim 1 further comprising a core supporting the substrate.

13. The elliptic dipole antenna of claim 12 wherein the core comprises foam plastic.

14. The elliptic dipole antenna of claim 13 wherein the foam plastic core comprises polymethacrylimide.

15. The elliptic dipole antenna of claim 12 wherein the core is solid.

16. The elliptic dipole antenna of claim 12 wherein the core is hollow.

17. The elliptic dipole antenna of claim 1 wherein the poise and the counterpoise are disposed onto the outer surface of the substrate.

18. The elliptic dipole antenna of claim 17 further comprising a coplanar waveguide feed coupled to the poise.

19. The elliptic dipole antenna of claim 18 further comprising a feed gap extending through the counterpoise, and wherein the coplanar waveguide feed extends through the feed gap to the poise.

20. The elliptic dipole antenna of claim 19 wherein the counterpoise includes a portion on each side of the feed gap which provides a ground plane for the coplanar waveguide feed, and wherein the counterpoise further comprises two isolation gaps to separate said portions from the remainder of the counterpoise.

21. A wireless device, comprising:

a transceiver; and

an elliptic dipole antenna comprising a poise and counterpoise each having an elliptical shape, and a substrate supporting the poise and counterpoise, the substrate having a closed three-dimensional shape.

22. The wireless device of claim 21 wherein each of the poise and counterpoise comprises an ellipse.

23. The wireless device of claim 21 wherein each of the poise and counterpoise comprises a half ellipse.

24. The wireless device of claim 23 wherein the poise further comprises a folded tip.

25. The wireless device of claim 21 wherein the substrate is cylindrical.

26. The wireless device of claim 21 wherein the substrate is rectangular.

27. The wireless device of claim 21 wherein the substrate comprises a flexible printed circuit board.

28. The wireless device of claim 21 wherein the substrate comprises polyimide film.

29. The wireless device of claim 21 wherein the poise and counterpoise are disposed on opposite sides of the substrate.

30. The wireless device of claim 29 wherein the elliptic dipole antenna further comprises a microstrip feed coupled to the poise.

31. The wireless device of claim 30 wherein the counterpoise includes a portion which provides a ground plane for the microstrip feed, and wherein the counterpoise further comprises two isolation gaps to separate said portion from the remainder of the counterpoise.

32. The wireless device of claim 21 wherein the elliptic dipole antenna further comprises a core supporting the substrate.

33. The wireless device of claim 32 wherein the core comprises plastic.

34. The wireless device of claim 33 wherein the plastic core comprises polymethacrylimide.

35. The wireless device of claim 32 wherein the core is solid.

36. The wireless device of claim 32 wherein the core is hollow.

37. The wireless device of claim 21 wherein the poise and the counterpoise are disposed onto the outer surface of the substrate.

38. The wireless device of claim 37 wherein the elliptic dipole antenna further comprises a coplanar waveguide feed coupled to the poise.

39. The wireless device of claim 38 further comprising a feed gap extending through the counterpoise, and wherein the coplanar waveguide feed extends through the gap to the poise.

40. The wireless device of claim 39 wherein the counterpoise includes a portion on each side of the feed gap which provides a ground plane for the coplanar waveguide feed, and wherein the counterpoise further comprises two isolation gaps to separate said portions from the remainder of the counterpoise.