NOVEL MICROWAVE FILTER DESIGN TECHNIQUES.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0443098
Entities
People
- D. B. Weller
- E. G. Cristal
- G. L. Matthaei
Organizations
- SRI International