Accession Number : ADD016063

Title :   Fiber Optic True Time-Delay Array Antenna Feed System.

Descriptive Note : Patent Application, Filed 17 Sep 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Esman, Ronald D ; Goldberg, Lew

Report Date : 17 Sep 1993

Pagination or Media Count : 39

Abstract : The fiber-optic true time-delay array antenna feed is a device for dynamically generating a plurality of identical electromagnetic radiation (EMR) signals with continuously variable time-delay separations. The EMR signal to be transmitted modulates a continuous-wave optical signal from a laser source which is applied to a plurality of high dispersion single-mode optical fibers acting as synchronized true time-delay modulators forming an array antennas feed system. Each fiber is chosen to have the same nominal time delay but a different net dispersion. Photodetectors convert the otpical intensity back into an EMR electrical signal to feed each of the elements of the array antenna.

Descriptors :   *ANTENNA ARRAYS, *ELECTROMAGNETIC RADIATION, *PATENT APPLICATIONS, *SIGNAL PROCESSING, *FIBER OPTICS, PHOTODETECTORS, CONTINUOUS WAVES, ELECTROMAGNETIC INTERFERENCE, PHOTONICS, ACOUSTOOPTICS, OPTICAL WAVEGUIDES, BEAM STEERING, AMPLIFIERS, BEAM SPLITTING, TUNABLE LASERS

Subject Categories : Electrical and Electronic Equipment
      Fiber Optics and Integrated Optics
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE