Antenna with reflector

• US 20040233118A1
• Filed: 05/23/2003
• Published: 11/25/2004
• Est. Priority Date: 05/23/2003
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Jocher, Ronald William
• Granted Patent: US 7,215,294 B2
• Time in Patent Office: Days
• US Class Current: 343/773
• 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 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H01Q 19/106 using two or more intersecting plane surfaces, e.g. corner reflector antennas
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An antenna which includes a monoconical antenna feed assembly, where the feed assembly has a base and an apex, a ground plane adjacent to the monoconical antenna feed assembly near the apex, and an antenna reflector coupled to the ground plane, where the antenna reflector at least partially surrounds the monoconical antenna feed assembly. The monoconical feed point is used to drive a reflector antenna. The broadband characteristics of the monoconical image vertical antenna (typical ground plane geometry) are used as the feed point for the reflector to give modest amount of gain while maintaining larger than previously developed bandwidths.

Claims

1. An antenna comprising

a monoconical antenna feed assembly having a base and an apex;

a ground plane located adjacent to said monoconical antenna feed assembly proximate the apex;

an antenna reflector coupled to said ground plane, said antenna reflector at least partially surrounding said monoconical antenna feed assembly.

2. The antenna of claim 1, wherein said antenna reflector is a modified corner antenna reflector.

3. The antenna of claim 1, wherein said antenna reflector is a solid metal antenna reflector.

4. The antenna of claim 1, wherein said antenna reflector is a mesh antenna reflector.

5. The antenna of claim 1, wherein said antenna reflector includes a plurality of bars.

6. The antenna of claim 1, wherein said antenna reflector includes a combination of solid metal, mesh, and bars.

7. The antenna of claim 1, wherein said antenna reflector includes a varying depth in thickness.

8. The antenna of claim 1, wherein said antenna has a reduced size in terms of wavelength, improved directivity, and wider bandwidth.

9. The antenna of claim 1, wherein the bandwidth is 1800-2200 MHz.

10. The antenna of claim 1, wherein said antenna reflector is sloped.

11. The antenna of claim 9, wherein said sloped antenna reflector is sloped at one of 30°

, 45°

, 60° and

90°

from horizontal.

12. The antenna of claim 1, wherein an outer surface of the monoconical antenna feed assembly comprises a conductive material and/or the outer surface of the ground plane comprises a conductive material.

13. The antenna of claim 11, wherein the ground plane comprises a conductive metal and the monoconical antenna feed assembly comprises an insulating material coated with conducting material.

14. The antenna of claim 11, further comprising:

an adapter structure.

15. An antenna comprising a ground plane;

means, connected to said groundplane, for increasing at least one of directivity and bandwidth of said antenna.

16. The antenna of claim 15, said means including

a monoconical antenna feed assembly, coupled to said ground plane, having a base and an apex.

17. The antenna of claim 16, said means further including

an antenna reflector, coupled to said ground plane, said antenna reflector at least partially surrounding said monoconical antenna feed assembly.

18. The antenna of claim 17, wherein said antenna reflector is a modified corner antenna reflector.

19. The antenna of claim 17, wherein said antenna reflector includes a combination of solid metal, mesh, and bars.

20. The antenna of claim 17, wherein said antenna reflector includes a varying depth in thickness.

21. The antenna of claim 17, wherein said antenna reflector is sloped.

22. The antenna of claim 21, wherein said sloped antenna reflector is sloped at one of 30°

, 45°

, 60° and

90°

from horizontal.