ELECTRONICALLY TUNABLE PARAMETRIC UPCONVERTER.
Abstract
A cryogenically-cooled, parametric up-converter has been developed that will operate in the 4-8 GHz band and exhibits the following performance at a typical operating frequency: Frequency, 6.2 GHz; instantaneous bandwidth, 50 MHz; gain, 20 db; noise temperature, 20 K at 30 K ambient temperate; and tuning range with a minimum of 10 db gain, 1 GHz. The up-converter tuning range is determined by the signal circuit bandwidth under pumped conditions. An increase in tuning range without a decrease in gain can be achieved by increasing the diode cut-off frequency or by the use of a multi-tuned signal circuit. With a single-tuned signal circuit and presently available diodes, the maximum tuning range for a minimum gain of 10 db is about 1 GHz. However, if the idler circuit of an up-converter is terminated in a negative resistance, octave-band tuning can be achieved without sacrificing gain or noise performance. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0820676
Entities
People
- B. Albrecht Jr
Organizations
- Control Data Corporation