Small and omni-directional biconical antenna for wireless communications

• US 6,943,747 B2
• Filed: 09/02/2003
• Issued: 09/13/2005
• Est. Priority Date: 09/02/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Do-Hoon
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): A, MINH D
• Application Number:
  US10/652,027
• Publication Number:
  US 20040041736A1
• Time in Patent Office: 742 Days
• Field of Search: 343/773, 343/786, 343/846, 343/772, 343/774, 343/769, 343/808, 343/874
• US Class Current: 343/773
• CPC Class Codes: H01Q 13/04 Biconical horns biconical dipoles comprising two conical surfaces having collinear axes and adjacent apices and fed by a two-conductor transmission line H01Q9/28
• CPC Class Codes: H01Q 19/08 for modifying the radiation pattern of a radiating horn in which it is located corrugated horns H01Q13/0208; producing a circular polarisation H01Q13/0241

Abstract

A biconical antenna for wireless communications includes a conical upper conductive body and a conical lower conductive body having a common apex, which is used as a power feed point, wherein a space between the conical upper and lower conductive bodies is filled with a dielectric material such that a shortest distance connecting the conical upper and lower conductive bodies along a surface of the dielectric material is a curve at which an incident angle of an incident wave incident on the surface of the dielectric material through the dielectric material from the common apex is a Brewster angle over the entire surface of the dielectric material.

Claims

1. A biconical antenna for wireless communications, comprising:

a conical upper conductive body and a conical lower conductive body having a common apex, which is used as a power feed point,

wherein a space between the conical upper and lower conductive bodies is filled with a dielectric material having a curved boundary surface such that an incident angle of an incident wave incident on the boundary surface of the dielectric material through the dielectric material from the common apex is a Brewster angle over the entire boundary surface of the dielectric material.

2. The biconical antenna as claimed in claim 1, wherein the curved boundary surface is a log-spiral curved boundary surface.

3. The biconical antenna as claimed in claim 1, wherein a dielectric constant of the dielectric material is between about 4-50.

4. The biconical antenna as claimed in claim 1, wherein the dielectric material is selected from the group consisting of high-density glass, dielectric ceramic, and engineering plastic.

5. The biconical antenna as claimed in claim 1, wherein a length of the conical upper conductive body is shorter than a length of the conical lower conductive body.

6. The biconical antenna as claimed in claim 5, wherein the length of the conical upper conductive body is at least λ

₀/4, wherein λ

₀ is a wavelength when a usable impulse is the minimum frequency.

7. The biconical antenna as claimed in claim 5, wherein the conical upper conductive body is extended beyond the curved boundary surface of the dielectric material.

8. The biconical antenna as claimed in claim 1, wherein a length of the conical lower conductive body is shorter than a length of the conical upper conductive body.

9. The biconical antenna as claimed in claim 8, wherein the length of the conical lower conductive body is at least λ

₀ /4, wherein λ

₀ is a wavelength when a usable impulse is the minimum frequency.

10. The biconical antenna as claimed in claim 8, wherein the conical lower conductive body is extended beyond the curved boundary surface of the dielectric material.

11. A biconical antenna for wireless communications, comprising:

a conical upper conductive body and a conical lower conductive body having a common apex, which is used as a power feed point,

wherein a space between the conical upper and lower conductive bodies is filled with a dielectric material selected from the group consisting of high-density glass, dielectric ceramic, and engineering plastic.

12. A biconical antenna for wireless communications, comprising:

a conical upper conductive body and a conical lower conductive body having a common apex, which is used as a power feed point,

wherein a space between the conical upper and lower conductive bodies is filled with a dielectric material, and a length of the conical upper conductive body is different than a length of the conical lower conductive body, the length of a longer of the conical upper conductive body and the conical lower conductive body is at least λ

₀/4, wherein λ

₀ is a wavelength when a usable impulse is the minimum frequency.

13. The biconical antenna as claimed in claim 12, wherein the length of the conical upper conductive body is longer than the length of the conical lower conductive body.

14. The biconical antenna as claimed in claim 12, wherein the length of the conical lower conductive body is longer than the length of the conical upper conductive body.