Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165777
