FREQUENCY CONVERTER UNITS FOR L-BAND, S-BAND, CBAND, AND X-BAND.
Abstract
Encouraging results were obtained with a coaxial impedance matching network for the L-band version of the 3-db hybrid four-crystal converter using cutoff 1N53B crystals. The K-band match was also improved by the addition of a step transformer. A double balanced modulator based on the TE11 mode in a coaxial line and using four cutoff 1N53B diodes was designed. The noise figure of an experimental single-crystal S-band up converter was measured as less than 13 db at frequencies at which conversion loss was less than 10 db. The automated apparatus for measuring the rectification characteristics of diodes was brought into operation. Various minor difficulties and operating problems are being overcome. Favorable results were obtained with the distributed-crystal holder approach. The principal advantage of this approach is that it facilitates obtaining a good impedance match at the IF port. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1964
- Accession Number
- AD0435766