Accession Number : AD0616349

Title :   STUDY OF IMPROVED RECEIVING TECHNIQUES FOR IONOSPHERIC SOUNDERS.

Descriptive Note : Final rept.,

Corporate Author : PICKARD AND BURNS ELECTRONICS WALTHAM MASS

Personal Author(s) : Spears,M. F. ; Arlin,M. N. ; Johnson,L. ; Snider,D.

Report Date : 06 AUG 1963

Pagination or Media Count : 49

Abstract : Activity in support of AFCRL research effort is reported: (1) Impedance measurements and radiation patterns were made on a ground-based Delta antenna at Homestead Air Force Base, Florida. Results were reported separately. (2) VLF and HF receiver couplers were built and installed in KC-135 research aircraft. The VLF coupler was atmospheric-noise limited when used with a 24-inch blade antenna. The HF coupler was 26 db above atmosphericnoise minimum when used with the same antenna. (3) A parametric VLF amplifier was constructed which had a gain-bandwidth product of 180 Mc and an equivalent noise resistance of 20 k. Substantially, all amplifier noise measured was attributed to the pump and detector rather than to the varactor amplifying element. (Author)

Descriptors :   (*ATMOSPHERIC SOUNDING, INSTRUMENTATION), COUPLED ANTENNAS, PARAMETRIC AMPLIFIERS, ELECTRICAL IMPEDANCE, ANTENNA RADIATION PATTERNS, PERFORMANCE(ENGINEERING)

Distribution Statement : APPROVED FOR PUBLIC RELEASE