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  • 1
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    Infrared Linear Imaging Array (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Photodiodes, multiplexer, and preamp reside in hybrid ceramic package. Hybrid microcircuit produces 128-element line images of infrared scenes. Each picture element is 0.008-in. (0.2-mm) square. Even without image data processing, microcircuit resolves temperature differences as small as 0.05 degrees C in infrared images.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-15805 , NASA Tech Briefs (ISSN 0145-319X); 9; 1; P. 56
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Electronic Compensation For Distortion Of Antenna Reflector (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Proposed method of obtaining approximately desired radiation or reception pattern from antenna that includes reflector based on concept of superposition of electromagnetic fields generated by multiple feedhorns or feed antenna elements arrayed at various positions near reflector and excited at electronically adjustable magnitudes and phases. In intended application, reflector nominally paraboloidal, feed elements N feedhorns in hexagonal array, and method used to compensate for deviations of real reflector surface from nominal paraboloidal shape. Method and concept also applicable to electronic beam steering and electronic antenna compensation in other situations.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-14461 , NASA Tech Briefs (ISSN 0145-319X); 19; 1; P. 32
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Computing Radiation From Multiple-Circular-Aperture Antennas (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Mutual Coupling Program for Circular Waveguide-fed Aperture Array (CWG) computer program developed to calculate electromagnetic interactions among elements of antenna arrays with circular apertures with specified distributions of electromagnetic fields in apertures. Distributions assumed superpositions of electromagnetic modes existing in circular waveguide. Various external media included to provide flexibility of use; for example, flexibility to determine effects of dielectric covers upon impedances of aperture-type antennas. Written in VAX FORTRAN for DEC VAX-series computers running VMS (LAR-15236) and IBM PC-series and compatible computers running MS-DOS (LAR-15226).
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-15226 , LAR-15236 , NASA Tech Briefs (ISSN 0145-319X); 19; 4; P. 62
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Hybrid Infrared Imager (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Experimental device has low noise and high uniformity. Infrared imaging device combines array of InSb photodetectors with array of silicon field-effect-transistor switches. InSb chip forms roof over Si chip, each InSb detector cell engaging indium bump on corresponding Si switch cell below it. FET switches in 128-by-128 array turn on in sequence, read out charges on 128-by-128 array of photodetectors and multiplex them in serial output that represents pattern of light on array of photodetectors. Useful in sensitive infrared cameras for astronomy, medicine, inspection, and military surveillance. Reads out image data at rates up to 10 MHz and expands to 256-by-256 array.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-17218 , NASA Tech Briefs (ISSN 0145-319X); 13; 1; P. 23
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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