Accession Number : ADB091746

Title :   Application of Integrated Optics and Fiber Optics to Phased-Array Antennas.

Descriptive Note : Rept. for Jan-May 84,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s) : Soref,R. A.

Report Date : MAY 1984

Pagination or Media Count : 43

Abstract : Time-delay steering of a 2-5 GHz microwave phased-array antenna is described. This report suggests that the antenna beam can be formed and steered by programmable optical time-delay elements. These delay elements would be part of a fiber-optical feed system for the antenna, a feed that requires microwave-to-optical and optical-to-microwave conversion. One programmable delay elelement is associated with each of the N x M microwave radiating elements in the array. The result is a broadband, agile, electronically steered, computer-controlled antenna. Because the programmable devices are 'fast', the antenna's pointing direction could be updated in less than 1 microsecond. To implement the delay devices, a combination of integrated optics and fiber optics is proposed. Fiber-optic paths of differing lengths would provide the required delays in the 0.1-to-20 nsec range by means of the 5 nsec/m optical propagation time per unit length of fiber. Integrated optical switches would be used to select the desired fiber paths. Keywords include: Integrated optics; Fiber optics; Phased array antennas; Electro-optics; Time-delay beamsteering; and Optical switching Ti:LiNb03.

Descriptors :   *ANTENNA FEEDS, *FIBER OPTICS, *ANTENNA ARRAYS, *PHASED ARRAYS, AIMING, ANTENNA RADIATION PATTERNS, ANTENNAS, BEAM STEERING, COMPUTER APPLICATIONS, COMPUTER PROGRAMMING, CONTROL, DELAY, DELAY CIRCUITS, DELAY ELEMENTS(EXPLOSIVE), FIBER OPTICS, FIBERS, INTEGRATED SYSTEMS, LENGTH, LIGHT TRANSMISSION, MICROWAVE EQUIPMENT, OPTICAL EQUIPMENT COMPONENTS, OPTICAL SWITCHING, OPTICS, PATHS, RADIATION, STEERING, TIME

Subject Categories : Electrical and Electronic Equipment
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE