Antenna array with wide-band reactance cancellation
AssigneeHRL Laboratories, LLC
InventorsCarson R. White, Jonathan J. Lynch
Life of this patent
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Abstract
An antenna array containing two or more radiating elements, with nearest neighbor radiating elements connected together with a non-Foster circuit at terminals of the radiating elements such that mutual reactance of the elements is reduced over a wider bandwidth than which would be obtained if the non-Foster circuits were omitted.
Claims23
An antenna array comprising two or more radiating elements, with nearest neighbor radiating elements connected together with a non-Foster circuit between terminals of the radiating elements such that a mutual reactance between the nearest neighbor radiating elements is reduced over a wider bandwidth than which would be obtained if the non-Foster circuits were omitted.
An antenna network for coupling a antenna array having two driven antenna elements with a sum-difference network having two outputs, the sum-difference network comprising three negative capacitors, first and second ones of the three negative capacitors each being coupled in series between one of the outputs of the sum-difference network and one of the two driven antenna elements, with the third one of the three negative capacitors being coupled between the two driven antenna elements.
A method of improving stability of the odd mode of an antenna system having one or more negative capacitors coupling neighboring driven elements to one another, the method comprising inserting a negative resistor in series with each of the negative capacitors coupling neighboring driven elements to one another.
An antenna array comprising two or more antenna elements, with nearest neighbor antenna elements connected together at feed points of said antenna elements by a non-Foster circuit.
A method of reducing the self reactance of a plurality of antenna elements disposed in an array of parallel antenna elements, the parallel antenna elements each having an axis which is laterally spaced the axes of other antennas in said array, the method comprising:
- a. providing a plurality of first non-Foster circuits each connected in series between a transmitter and/or a receiver and a connection point of each antenna element disposed in said array, and
- b. providing a plurality of second non-Foster circuits connected between the connection points of neighboring antenna elements disposed in said array.
Dependencies are inferred from the claim text.