Accession Number : AD0435766


Title :   FREQUENCY CONVERTER UNITS FOR L-BAND, S-BAND, CBAND, AND X-BAND.


Descriptive Note : Interim development rept. no. 9, 1-31 Mar 64.


Corporate Author : ELECTROMAGNETIC TECHNOLOGY CORP PALO ALTO CA


Report Date : 15 Apr 1964


Pagination or Media Count : 17


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)


Descriptors :   *FREQUENCY CONVERTERS , L BAND , S BAND , C BAND , X BAND , IMPEDANCE MATCHING , NETWORKS , COAXIAL CABLES , TEST EQUIPMENT , ELECTRONIC EQUIPMENT , CRYSTAL HOLDERS , TRANSFORMERS , FREQUENCY DIVIDERS , EXTREMELY HIGH FREQUENCY , SEMICONDUCTOR DIODES , KLYSTRONS , ULTRAHIGH FREQUENCY


Distribution Statement : APPROVED FOR PUBLIC RELEASE