US 7,898,493 B1 · Implementation of ultra wide band (UWB) electrically small antennas by means of distributed non foster loading

Abstract

A method to design antennas with broadband characteristics. In an exemplary embodiment, a method comprises loading an antenna structure with multiple reactive loads. The multiple loads are synthesized by applying the theory of Characteristic Modes. Another exemplary embodiment includes an antenna adapted to have broadband characteristics. One example is a wire dipole antenna. In an exemplary embodiment, a loaded antenna may be adapted to resonate an arbitrary current over a wide frequency band. The loads may require non-Foster elements when realized. Exemplary embodiments may include the broadband characteristics of the both the input impedance at the terminal of the antenna as well as the radiation pattern.

Claims21

Dependent claims

A method for designing an antenna, said method comprising:

determining a desired current distribution over an antenna;
determining a number and location of at least one port over said antenna;
determining at least one desired load to achieve said desired current distribution;
providing said at least one desired load with at least one lumped Foster or non-Foster circuit elements;
and
determining current and radiation patterns over a desired frequency band.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/139,424Filed 13 Jun 2008 · us provisional application

Priority

13 Jun 2007

Granted

1 Mar 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H01Q 9/24
Two collinear substantially straight active elements; Substantially straight single active elements: shunt feed arrangements to single active…
H01Q 5/00
Arrangements for simultaneous operation of antennas on two or more different wavebands
H01Q 5/321
Using frequency dependent circuits or components, e.g. trap circuits or capacitors: within a radiating element or between connected radiating elements
H01Q
Antennas, i.e. radio aerials

Implementation of ultra wide band (UWB) electrically small antennas by means of distributed non foster loading

Life of this patent

Implementation of ultra wide band (UWB) electrically small antennas by means of distributed non foster loading

Life of this patent

Abstract

Claims21