Wide-band fractal antenna

• US 7,190,318 B2
• Filed: 03/29/2004
• Issued: 03/13/2007
• Est. Priority Date: 03/29/2003
• Status: Active Grant

• Current Assignee: Fractal Antenna Systems Inc.
• Original Assignee: Nathan Cohen
• Inventors: Cohen, Nathan
• Primary Examiner(s): Dinh; Trinh
• Assistant Examiner(s): MANCUSO, HUEDUNG XUAN CAO
• Application Number:
  US10/812,276
• Publication Number:
  US 20050068240A1
• Time in Patent Office: 1,079 Days
• Field of Search: 343/773, 343/786, 343/774
• US Class Current: 343/773
• 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
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An apparatus includes a discone antenna including a cone-shaped element whose physical shape is at least partially defined by at least one pleat.

Claims

1. An apparatus comprising:

a discone antenna including a cone-shaped element, the physical shape of which is at least partially defined by at least one pleat, wherein each pleat includes two faces joined at a vertex having an included angle of less than 180 degrees as directed away from a principal axis of the cone-shaped element, and wherein the two faces of the pleat do not substantially overlap one another in a direction transverse to a bisector of the included angle.

2. The apparatus of claim 1 wherein the discone antenna includes a disc-shaped element whose physical shape is at least partially defined by a fractal geometry.

3. The apparatus of claim 1 wherein the physical shape of the cone-shaped element includes a least one hole.

4. The apparatus of claim 1 wherein the physical shape of the cone-shaped element is at least partially defined by a series of pleats that extend about a portion of the cone.

5. An apparatus comprising:

a bicone antenna including two cone-shaped elements, the physical shape of at least one of which is at least partially defined by at least one pleat, wherein each pleat includes two faces joined at a vertex having an included angle of less than 180 degrees as directed away from a principal axis of the cone-shaped element, and wherein the two faces of the pleat do not substantially overlap one another in a direction transverse to a bisector of the included angle.

6. The apparatus of claim 5 wherein the physical shape of one of the two cone-shaped elements is at least partially defined by at least one hole.

7. The apparatus of claim 5 wherein the physical shape of one of the two cone-shaped elements is at least partially defined by a series of pleats that extend about a portion of the cone.