Accession Number : AD0430101
Title : X-BAND MASER RECEIVER COMPLEX.
Descriptive Note : Final rept.
Corporate Author : COLLINS RADIO CO CEDAR RAPIDS IOWA
Report Date : Jan 1964
Pagination or Media Count : 161
Abstract : A receiving complex is described. It was installed at the Trebein site near Wright-Patterson Air Force Base and was to be used as the ground receiving station for Project Leapfrog. The system was designed to study the capability and performance using a belt of orbiting resonant dipoles as reflectors for microwave communications. A twin cavity maser preamplifier is used to obtain low-noise performance at 7750 and 8350 mc. The measured equivalent noise temperature of the receiver is approximately 50 K. A 13.5-foot parabolic reflector is used, having a high F/D ratio. This resulted in extremely low side-lobe gains, thereby increasing the system signal-to-noise ratio. The antenna is mounted upon a modified SCR-584 radar mount. The system local oscillator has a short-term stability of 1 x 10 to the -8th power, permitting accurate signal frequency determination. The oscillator stability is obtained by the use of crystal oscillator and varactor multipliers. (Author)
Descriptors : MICROWAVE COMMUNICATIONS , PARABOLIC ANTENNAS , X BAND , AIR TO SURFACE , SIMULATION , ANTENNA FEEDS , PREAMPLIFIERS , SERVOMECHANISMS
Distribution Statement : APPROVED FOR PUBLIC RELEASE