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Rigorous analysis of novel dielectric resonator filters with printed tuning septum

Research paper by Ruediger Vahldieck, Wolfgang J. R. Hoefer

Indexed on: 01 Jul '87Published on: 01 Jul '87Published in: International journal of infrared and millimeter waves



Abstract

This paper describes the analysis of dielectric resonator filters with printed tuning septum in waveguide sections operating below cutoff. In this design approach a thick dielectric slab of high permittivity is placed longitudinally in the waveguide. A bilateral ladder-shaped metallization determines the resonator and coupling sections (modified finline filter). In contrast to conventional dielectric resonator filters, this approach provides better passband separation and increased stopband attenuation. Furthermore, due to the bilateral tuning septum, the resonator and coupling sections can be manufactured accurately with photolithographic techniques rather than by expensive machining.