Analysis and tuning efficiency optimization of magnetically tuned printed E-plane circuit filters

Author

Uher, J. ; Hoefer, W.J.R.

Author_Institution

Lab. for Electromagn. & Microwaves, Ottawa Univ., Ont., Canada

fYear

1989

fDate

13-15 June 1989

Firstpage

1273

Abstract

The tuning efficiency of a metal insert filter loaded with ferrite slabs is defined and analyzed. Three parameters which dominate the filter tunability (ferrite slab thickness, distance to the narrow waveguide wall, and ferrite saturation magnetization) are discussed. An optimum combination of these parameters has been found, and a novel filter design based on the model scattering method is presented. The improved filters can be tuned over 60-70% of a standard waveguide band with an insertion loss between 1 and 3 dB, depending on frequency.<>

Keywords

band-pass filters; ferrite applications; microwave filters; passive filters; tuning; waveguide components; 1 to 3 dB; ferrite saturation magnetization; ferrite slab loaded filter; ferrite slab thickness; filter tunability; insertion loss; magnetically tuned; metal insert filter; microwave band-pass filters; model scattering method; printed E-plane circuit filters; tuning efficiency optimization; Band pass filters; Circuit optimization; Ferrites; Magnetic analysis; Magnetic circuits; Magnetic separation; Resonator filters; Saturation magnetization; Slabs; Tuned circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1989., IEEE MTT-S International

Conference_Location

Long Beach, CA, USA

Type

conf

DOI

10.1109/MWSYM.1989.38959

Filename

38959