Novel tunable hexaferrite bandpass filter based on open-ended finlines

Author

Sterns, Michael ; Rehner, Robert ; Schneiderbanger, D. ; Martius, Siegfried ; Schmidt, Lorenz-Peter

Author_Institution

Lehrstuhl fur Hochfrequenztech., Univ. of Erlangen-Nuremberg, Erlangen, Germany

fYear

2009

fDate

7-12 June 2009

Firstpage

637

Lastpage

640

Abstract

In this paper a novel tunable bandpass filter based on open ended finlines is presented. Hexagonal ferrite spheres are used as resonators to cover a tuning frequency range from 39 GHz to 68 GHz. The measured insertion loss of the filter varies from 5.3 dB to 7 dB with a typical 3 dB-Bandwidth between 300 MHz and 400 MHz. An off-resonance isolation of about 60 dB is achieved although only two spheres are used.

Keywords

band-pass filters; fin line components; microstrip lines; millimetre wave filters; resonator filters; bandwidth 300 MHz to 400 MHz; broadband transitions; frequency 39 GHz to 68 GHz; hexagonal ferrite spheres; loss 5.3 dB to 7 dB; microstrip line; open ended finlines; planar transmission line; resonator spheres; tunable hexaferrite bandpass filter; Band pass filters; Couplings; Ferrites; Finline; Frequency; Insertion loss; Rectangular waveguides; Resonator filters; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165777

Filename

5165777