Accession Number : AD0285583

Title :   MICROWAVE FILTERS AND COUPLING STRUCTURES

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : GETSINGER,W.J. ; CRISTAL,E.G. ; MATTHAEI,G.L.

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : Research continued on electronically tunable upconverters. In these up-converters, tuning is achieved by varying the pump frequency. Design procedures suitable for programming on a computer are developed for the cases of electronically tunable upper-sideband up-converters. The diode is assumed to be resonated by a single stub connected either in series with the diode or in shunt, and all diode parasitic parameters are included. Procedures for computing the gain vs frequency and the midband noise figure are also presented. The computed performance of a number of trial designs in the 1-to-2-gc and 2-to-4-gc tuning ranges are shown, and the results discussed. A study is presented of the design multiplexers having contiguous passbands. In the design procedure discussed, the individual filters are designed from Tchebyscheff low-pass prototype filters having a resistor termination at one end only. This approach can be used for the design of either series-connected or shunt-connected multiplexers. In either case an additional reactance-1 or susceptance-annulling network is required in order to obtain optimum performance. (Author)

Descriptors :   *BAND PASS FILTERS, *COUPLING CIRCUITS, *RADIOFREQUENCY FILTERS, *WAVEGUIDE COUPLERS, CAVITY RESONATORS, CIRCUITS, DIODES, IMPEDANCE MATCHING, LOW PASS FILTERS, MATHEMATICAL ANALYSIS, MICROWAVE EQUIPMENT, STANDING WAVE RATIOS, TRANSMISSION LINES, TUNED CIRCUITS

Distribution Statement : APPROVED FOR PUBLIC RELEASE