FRACTAL ANTENNAS AND FRACTAL RESONATORS

• US 20110095955A1
• Filed: 07/02/2010
• Published: 04/28/2011
• Est. Priority Date: 08/09/1995
• Status: Abandoned Application

• Current Assignee: Fractal Antenna Systems Inc.
• Original Assignee: Fractal Antenna Systems Inc.
• Inventors: Cohen, Nathan
• Application Number:
  US12/829,622
• Publication Number:
  US 20110095955A1
• Time in Patent Office: Days
• US Class Current: 343/837
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• 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 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 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

An antenna includes at least one element whose physical shape is at least partially defined as a second or higher iteration deterministic fractal. The resultant fractal antenna does not rely upon an opening angle for performance, and may be fabricated as a dipole, a vertical, or a quad, among other configurations. The number of resonant frequencies for the fractal antenna increases with iteration number N and more such frequencies are present than in a prior art Euclidean antenna. Further, the resonant frequencies can include non-harmonically related frequencies. At the high frequencies associated with wireless and cellular telephone communications, a second or third iteration, preferably Minkowski fractal antenna is implemented on a printed circuit board that is small enough to fit within the telephone housing.

Claims

1. ) A resonator system comprising:

one or more resonant electrical structures, at least one of which including a portion that includes at least a first motif and a first replication of the first motif and a second replication of the first motif such that a point chosen on a geometric figure represented by the first motif will result in a corresponding point on the first replication and on the second replication of the first motif, wherein a replication of the first motif is a change selected from a group consisting of (a) a rotation and change of scale of the first motif, (b) a linear displacement translation and a change of scale of the first motif, and (c) a rotation and a linear displacement translation and a change of scale of the first motif.

2. ) The resonator system of claim 1, wherein the one or more resonant electrical structures comprise a plurality of resonant structures, wherein each resonant structure is adjacent to at least one other resonator, but no resonant structure is in physical contact with another resonant structure.

3. ) The resonator system of claim 2, further comprising an antenna within electrical proximity to the system, without making physical contact, wherein the antenna is configured to irradiate the system the one or more resonant electrical structures.

4. ) The resonator system of claim 2, wherein the plurality of resonant structures are stacked in layers and separated by a dielectric spacer.

5. ) The resonator system of claim 3, wherein the plurality of resonant structures are stacked in layers and separated by a dielectric spacer.