Title :
Shunt-inductance-coupled waveguide filters with expanded second stopband
Author :
Arndt, F. ; Bornemann, Jens ; Piontek, C. ; Sch¿¿uler, H.
Author_Institution :
University of Bremen, Microwave Department, Bremen, West Germany
Abstract :
A computer-aided design is described for inductive iris and inductive double-strip coupled filters with increased-width resonator sections. The theory includes both the higher-order-mode interaction of all discontinuities and the finite thickness of the irises and inserts. The step-wall discontinuity effect is included in the optimisation process as an additional design parameter. Design examples for midband frequencies of about 11 and 16 GHz are given; the corresponding stop-band attenuation is higher than 50 dB, or 40 dB, up to 18.5 GHz, or 24.5 GHz, respectively.
Keywords :
CAD; band-stop filters; microwave filters; passive filters; waveguide components; computer-aided design; discontinuities; expanded second stopband; finite thickness; higher-order-mode interaction; inductive double-strip coupled filters; inductive iris; microwave filters; midband frequencies; optimisation process; shunt inductance coupled filters; step-wall discontinuity effect; stop band attenuation; waveguide filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850170
