TUNABLE PRESELECTION THROUGH PARAMETRIC CONVERSION,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1964
- Accession Number
- AD0614027
Entities
People
- Eugene J. Chabak
- Joseph M. Giannotto
Organizations
- United States Army Communications-Electronics Command