Accession Number:

AD0614027

Title:

TUNABLE PRESELECTION THROUGH PARAMETRIC CONVERSION,

Descriptive Note:

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Report Date:

1964-11-01

Pagination or Media Count:

48.0

Abstract:

One of the most damaging deficiencies in present RF receiver design is vulnerability to overloading caused by strong out-of-band signals which can partially or completely disrupt communications. The emergence of the parametric amplifier has provided the design engineer with a frequency converter which is considerably more amplitude-linear than conventional devices, with the added feature of low noise characteristics. The attenuation of strong out-of-band signals is accomplished by the use of a high Q fixed frequency filter following the parametric converter. With this approach a dynamic range of 140 db has been achieved, an improvement of 55 to 60 db over well designed conventional receivers. The report presents comprehensive performance characteristics of a tunable parametric preselector which was developed to operate over the frequency range of 2 to 32 megacycles. Also presented is a discussion of the ramifications of selecting the specific circuitry and parts. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE