Accession Number : ADD015723

Title :   Optically Controlled Active Impedance Element Particularly Suited for a Microwave Oscillator.

Descriptive Note : Patent, Filed 28 Feb 92, patented 30 Mar 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Jemison, William D ; Herezfeld, Peter R

Report Date : 30 Mar 1993

Pagination or Media Count : 11

Abstract : An optically controlled active impedance element particularly suited to serve as a tuneable inductive element for a microwave oscillator is disclosed. The optically controlled active inductive element is comprised of a circuit arrangement, preferably consisting of MESFET devices which exhibit a composite inductive characteristics, and whose inductance may be determined and controlled by direct illumination impinging on the MESFETs. The optically controlled active inductive element lends itself to being adapted to monolithic microwave integrated circuit (MMIC) applications and may find use in a wide variety of microwave circuits. Also disclosed, is an embodiment which used the optical controlled active impedance element, in a prescribed manner, to serve as a tunable capacitor for use in various microwave circuits.

Descriptors :   *PATENTS, *MICROWAVE OSCILLATORS, *IMPEDANCE, *OPTICAL PROPERTIES, *CONTROL SYSTEMS, MONOLITHIC STRUCTURES(ELECTRONICS), INDUCTANCE, SCHEMATIC DIAGRAMS, BANDPASS FILTERS

Subject Categories : Electrical and Electronic Equipment
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE