Accession Number : ADD015688

Title :   Optical Antenna Beam Steering Using Digital Phase Shifter Control.

Descriptive Note : Patent, Filed 11 Mar 92, patented 17 Nov 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Jemison, William D ; Herczfeld, R ; Paolella, Arthur

Report Date : 17 Nov 1992

Pagination or Media Count : 11

Abstract : A method and system for steering an antenna beam are provided. A light source emits light wherein at least one parameter of the emitted light is modulated. Modulated light is received by an optical detector and an analog control signal is provided by the optical detector in response to the modulated parameter. The control signal is applied to an analog-to-digital converter to convert the signal from analog to digital. The digital converter output signal is applied to a digital phase shifter for controlling the phase shift of the phase shifter and thereby steering an antenna beam according to the modulated parameter. The modulated parameter may be, for example. the intensity of the emitted light or the frequency of the emitted light. A plurality of converters and phase shifters may be provided for steering of phased array antennas.

Descriptors :   *PATENTS, *BEAM STEERING, *ANTENNA ARRAYS, *PHASE SHIFT CIRCUITS, ANALOG TO DIGITAL CONVERTERS, ANALOGS, ANTENNAS, LIGHT SOURCES, OPTICAL DETECTORS, SIGNALS, LIGHT EMITTING DIODES, LIGHT MODULATORS, PHASE SHIFT, PHASED ARRAYS, RADAR, OPTICAL COMMUNICATIONS

Subject Categories : Electrical and Electronic Equipment
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE