Systems and methods for wireless telecommunications

• US 6,900,772 B2
• Filed: 12/18/2003
• Issued: 05/31/2005
• Est. Priority Date: 12/19/2002
• Status: Expired due to Fees

• Current Assignee: Fred Pulver
• Original Assignee: Fred Pulver
• Inventors: Pulver, Fred
• Primary Examiner(s): Le, Hoanganh
• Application Number:
  US10/737,878
• Publication Number:
  US 20040160372A1
• Time in Patent Office: 530 Days
• Field of Search: H01/Q00.1/42, H01/Q00.1/36, 343/789, 343/895, 343/702, 343/700.MS
• US Class Current: 343/789
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 11/08 Helical antennas
• CPC Class Codes: H01Q 13/0208 Corrugated horns waveguide mouth antenna with corrugated flange H01Q13/065; manufacturing details H01Q13/0283
• CPC Class Codes: H01Q 13/0266 provided with a flange or a choke
• CPC Class Codes: H01Q 13/065 provided with a flange or a choke
• CPC Class Codes: H01Q 19/10 using reflecting surfaces

Abstract

An antenna having an antenna cup and a helical element mounted in the antenna cup. The antenna cup has a side wall extending from a base thereof towards an open end thereof, the side wall having a plurality of slots formed therein, a first set of the slots being arranged parallel to a longitudinal axis of the helical element and a second set of the slots being arranged perpendicular to the longitudinal axis of the helical element, the first set of slots being arranged to surround an upper portion of the helical element and the second set of slots being arranged to surround a lower portion of the helical element. The slots present a high impedance wall to surface currents and thereby significantly reduce side lobe radiation. Such an antenna is particular useful in antenna co-location applications, such as cellular telephone and Wi-Fi applications.

Claims

1. An antenna, comprising:

an antenna cup having a driven element mounted therein such that a longitudinal axis of the driven element is arranged to be substantially centered within the antenna cup, the antenna cup having a side wall that encircles the driven element and is at least as high as a top end of an upper portion of the driven element, the side wall of the antenna cup having a plurality of slots formed therein, at least some of the slots being arranged to be parallel to the longitudinal axis of the driven element and at least some other of the slots being arranged to be perpendicular to the longitudinal axis of the driven element.

2. The antenna of claim 1, wherein the slots arranged to be perpendicular to the longitudinal axis of the driven element are disposed around a lower portion of the driven element.

3. The antenna of claim 1, wherein the slots arranged to be parallel to the longitudinal axis of the driven element are disposed around an upper portion of the driven element.

4. The antenna of claim 1, wherein the slots have a depth that substantially corresponds to an odd multiple of a quarter wavelength of a frequency for which the antenna is intended to be used.

5. The antenna of claim 1, wherein a series of adjacent slots are successively deeper.

6. The antenna of claim 5, wherein a shallowest one of the series of adjacent slots and a deepest one of the series of adjacent slots correspond to edges of a band of frequencies for which the antenna is intended to be used.

7. The antenna of claim 1, wherein the antenna is mounted in an array of similarly configured antennas.

8. The antenna of claim 1, wherein the antenna is used in conjunction with a cellular telephone.

9. The antenna of claim 1, wherein the antenna is used in conjunction with a Wi-Fi application.

10. The antenna of claim 1, wherein side lobe energy is less than −

30 dB.

11. The antenna of claim 10, wherein isolation between two of such antennas is at least 60 dB.

12. The antenna of claim 11, wherein the isolation is about 70 dB.

13. The antenna of claim 1, wherein the antenna is formed from a unitary piece of electrically conductive material.

14. The antenna of claim 1, wherein the antenna is formed from non-electrically conductive material, and is overmolded with electrically conductive material.

15. The antenna of claim 1, in combination with an analog telephone.

16. The antenna of claim 15, wherein the analog telephone comprises a part of at least one of a PBX and a Key system.

17. The antenna of claim 1, wherein the driven element is helical element.

18. An antenna, comprising:

an antenna cup; and

a helical element mounted in the antenna cup,

wherein the antenna cup comprises a side wall extending from a base thereof towards an open end thereof, the side wall having a plurality of slots formed therein, a first set of the slots being arranged parallel to a longitudinal axis of the helical element and a second set of the slots being arranged perpendicular to the longitudinal axis of the helical element, the first set of slots being arranged to surround an upper portion of the helical element and the second set of slots being arranged to surround a lower portion of the helical element.

19. The antenna of claim 18, wherein the first set of slots is arranged concentrically.

20. The antenna of claim 18, wherein at least one of the first and second sets of slots has successively increased depth.

21. The antenna of claim 18, wherein side lobe energy is less than −

30 dB.

22. The antenna of claim 18, wherein isolation between two of such antennas is at least 60 dB.

23. The antenna of claim 18, mounted in an array with similarly-configured antennas.

24. An antenna, comprising:

an antenna cup and a driven element mounted inside the antenna cup, the antenna cup having a first set of slots in an upper portion of a sidewall thereof and a second set of slots in a lower portion of the sidewall;

the first set of slots extending substantially parallel to an exterior annular surface of the sidewall and the second set of slots extending perpendicularly to the first set of slots, wherein the first and second set of slots have depths corresponding to a multiple of a quarter wavelength of a frequency for which the antenna is intended to be used.