TERMINAL

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 667
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1983
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
E-tek Dynamics Inc
250 East Drive, Melbourne, FL, 32901
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 J.J. PAN
 PRINCIPAL INVESTIGATOR
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
GROWTH OF SOPHISTICATED MILLIMETER-WAVE (MMW) SATELLITE COMMUNICATIONS (SATCOM) IS DRIVING DESIGN OF SATELLITE GROUND TERMINALS TOWARD HIGHER FREQUENCY, LOWER COST, HIGHERRELIABILITY, REMOTE OPERATION, FEWER MAINTENANCE ACTIVITIES,AND FREEDOM FROM EMI/EMP. THE MMW SATCOM SYSTEMS REQUIRE A WIDE IF BANDWIDTH, EITHER TO ACCOMODATE HIGH DATA RATES OR TO PROVIDE FOR JAM-RESISTANCE THROUGH USE OF WIDEBAND FREQUENCY HOPPING AND/OR SPREAD SPECTRUM TECHNIQUES. BOTH RECTANGULAR WAVEGUIDE AND COAXIAL CABLE LINKS SUFFER DISADVANTAGES OF INFLEXIBILITY, HIGH LOSS, HIGH COST, DELAY DISTORTION, EMI/EMP PROBLEMS, AND PHASE DISTORTIONS. OVERCOMING THESE SHORTCOMINGS MAY BE POSSIBLE THROUGH EXPLOITING THE CHARACTERISTICS OF RECENTLY DEVELOPED ELECTRO-OPTICAL MODULATORS AND DETECTORS AND WIDE-BAND- WIDTH, LOW-LOSS FIBER-OPTIC CABLE. THIS PROJECT INVESTIGATES AND DESIGNS 20 AND 30 GHZ FIBER-OPTIC LINKS USING EXTERNAL ELECTRO-OPTIC MODULATORS AND MESFET (OR SCHOTTKY DIODE) PHOTODETECTION FOR SATCOM DOWN AND UP LINK. A WIDEBAND MICROWAVE FIBER-OPTIC LINK USING DIRECTLY MODULATED LASER DIODE IS DESIGNED FOR TERMINAL IF APPLICATION. FURTHERMORE, THE PROJECT INVESTIGATES A 30/20 GHZ INTEGRATED TERMINAL CONCEPT CONFIGURED TO REALIZE THE PROMISED IMPROVEMENTS IN COST EFFECTIVENESS AND PERFORMANCE OF ELECTRO-OPTIC AND FIBER-OPTIC DEVICES.

* information listed above is at the time of submission.

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