Accession Number : ADA190666

Title :   The Superconducting Phase Shifter in the Development of a Terahertz Imaging Radar System.

Descriptive Note : Final technical rept. Aug 86-Jan 87,

Corporate Author : HYPRES INC ELMSFORD NY

Personal Author(s) : Baliga, S ; Radparvar, M ; Faris, S M

PDF Url : ADA190666

Report Date : Oct 1987

Pagination or Media Count : 44

Abstract : A Terahertz Imaging Radar System which exploits superconductive electronics for all of its major components is described in this report. In particular, the importance of the superconducting millimeter (mm) wave phase shifter in the development of such systems has been fully investigated. The experimental and theoretical results presented here are better than we expected to achieve under Phase I of the project. Conventional technology is unable to provide that high frequencies required to obtain small apertures for target acquisition. Superconducting technology offers a high performance, very broadband and low power, mm and sub-mm wave phase shifter based on superconducting microstrips. The physics of the non-equilibrium superconductivity underlying the operation of the superconducting microstrip phase shifter has been studied. Theoretical analysis and numerous experimental results show that superconducting stripline modulation leading to phase velocity reduction and subsequent phase shift is achievable by quasi-particle injection. A digital N-bit phase shifter based on the superconducting microstrip transmission line is proposed for development. The implementations of such a mm and sub-mm wave phase shifter will fulfill a crucial need in the development of the Terahertz Imaging Radar.

Descriptors :   *DIGITAL SYSTEMS, *PHASE SHIFT CIRCUITS, *STRIP TRANSMISSION LINES, *SUPERCONDUCTIVITY, *SUPERCONDUCTORS, APERTURES, BROADBAND, ELECTRONICS, EQUILIBRIUM(GENERAL), HIGH FREQUENCY, LOW POWER, MODULATION, PHASE, PHASE SHIFT, PHYSICS, REDUCTION, TARGET ACQUISITION, THEORY, TRANSMISSION LINES, VELOCITY, WAVES

Subject Categories : Electrical and Electronic Equipment
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE