Electromagnetically coupled end-fed elliptical dipole for ultra-wide band systems

• US 20040217912A1
• Filed: 01/30/2004
• Published: 11/04/2004
• Est. Priority Date: 04/25/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Mohammadian, Alireza Hormoz
• Granted Patent: US 7,973,733 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 13/085 Slot-line radiating ends
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

An antenna that includes a first plane, a second plane spaced apart from the first plane, a first radiating surface, positioned substantially on the first plane, to act as a poise, a second radiating surface to act as a counterpoise, and an end-feed microstrip positioned on the second plane, wherein the first radiating surface and the second radiating surface are electromagnetically coupled to the end-feed microstrip.

Claims

1. An antenna comprising:

a first plane;

a second plane spaced apart from the first plane;

a first radiating surface, positioned on the first plane, to act as a poise;

a second radiating surface to act as a counterpoise, and an end-feed microstrip positioned on the second plane, wherein the first radiating surface and the second radiating surface are electromagnetically coupled to the end-feed microstrip.

2. The antenna of claim 1, wherein the counterpoise is positioned on the first plane.

3. The antenna of claim 1, wherein the counterpoise is positioned on the second plane.

4. The antenna of claim 1, further comprising cutouts in the counterpoise.

5. The antenna of claim 1, wherein adjacent edges of the first and second radiating surfaces are at least partially elliptical.

6. The antenna of claim 5, wherein the elliptical portion of the first and second radiating surfaces have a ratio of a major axis to a minor axis in the range of approximately 1.00:

1 to 1.90;

1.

7. The antenna of claim 6, wherein the minor axis is >

0.20λ

.

8. The antenna of claim 6, wherein at least one radiating surface has cutouts in the ellipse shape to allow for the placement of through holes.

9. The antenna of claim 1, wherein at least a portion of the poise radiating surface area is non-planar.

10. The antenna of claim 9, wherein the non-planar area is created by at least one bend in the poise radiating surface.

11. The antenna of claim 1, wherein the first plane is a top surface of a dielectric substrate and the second plane is a bottom surface of the dielectric substrate.

13. The antenna of claim 1, wherein the antenna is connected to a device chosen from the group consisting of a cell phone handset, a computer connected to a local area network, a PDA, a computer peripheral device, a collision-detection system, a suspension system, through-wall imaging systems and a ground-penetrating radar.

14. An antenna comprising:

a first plane;

a second plane spaced apart from the first plane;

a first radiating surface, positioned substantially on the first plane, to act as a poise;

a second radiating surface to act as a counterpoise, and

an end-fed microstrip positioned on the second plane, wherein the first radiating surface and the second radiating surface are electromagnetically coupled to the end-feed microstrip.

15. The antenna of claim 14, wherein the counterpoise is positioned on the first plane.

16. The antenna of claim 14, wherein the counterpoise is positioned on the second plane.

17. The antenna of claim 14, wherein adjacent edges of the first and second radiating surfaces are at least partially elliptical.

18. The antenna of claim 14, wherein at least a portion of the poise radiating surface area is non-planar.

19. The antenna of claim 18, wherein the non-planar area is created by at least one bend in the poise radiating surface.

20. The antenna of claim 18, wherein the end-fed microstrip has a varying width.