FREQUENCY CONVERTER UNITS FOR L-BAND, S-BAND, C-BAND AND X-BAND.
Abstract
A high-pass filter using smooth tapers instead of multiple step transformers for input and output impedance matching was designed and is being fabricated. A flat iris band-pass filter for the L-band converter was constructed and tested. Another commercial low-pass filter having a 10 Gc cutoff was tested for suitability in these frequency converters. A crystal mount suitable to the needs of the converter was designed and built, and is now being used satisfactorily. Tests were made to determine the power handling capability of a 1N53 crystal at the temperature of dry ice. At 15 mw drive the conversion loss deteriorated 6 db in four hours. A 1N26A crystal at room temperature showed no deterioration in four hours at a drive of 40 mw. The frequency converting properties of varactor diodes were explored in the knowledge that such diodes readily handle relatively large voltages. Preliminary results are quite discouraging, and this approach has been abandoned. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1964
- Accession Number
- AD0427188