Accession Number : AD0443098


Title :   NOVEL MICROWAVE FILTER DESIGN TECHNIQUES.


Descriptive Note : Quarterly progress rept. no. 5, 1 Jan-31 Mar 64,


Corporate Author : STANFORD RESEARCH INST MENLO PARK CA


Personal Author(s) : Matthaei, G L ; Cristal, E G ; Weller, D B


Report Date : Apr 1964


Pagination or Media Count : 69


Abstract : A technique is described for obtaining enhanced coupling between an external circuit and a ferrimagnetic resonator for a magnetically tunable filter. This technique makes use of impedancetransforming networks of low-pass filter form. The technique is also applicable in waveguide. The results of a trial magnetically tunable filter using gallium-substituted yttrium-iron-garnet resonators is described. A trial multiplexer channel unit was constructed using an interdigital filter and a parallel-coupled-resonator band-stop filter. The unit was fabricated in strip-line with resonators consisting of round rods between parallel ground planes. The design was based on previously published design theory and also on a new method synthesizing the band-stop filter. The new synthesis method uses a way of applying Kuroda's identity that is an alternate to the way previously used in our work. Details of the synthesis method are presented. (Author)


Descriptors :   MICROWAVE EQUIPMENT , ELECTRIC FILTERS , COUPLING CIRCUITS , FERROMAGNETIC MATERIALS , RESONATORS , TUNING DEVICES , MAGNETIC PROPERTIES , LOW PASS FILTERS , IMPEDANCE MATCHING , WAVEGUIDES , IRON , YTTERBIUM , GARNET , GALLIUM , DIGITAL SYSTEMS , MULTIPLEXING , SYNTHESIS , EQUATIONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE