Dielectric resonance in nickel ferrite for K and Ka‐band filters
作者： Maksym A. Popov , Igor V. Zavislyak , D. V. B. Murthy , Gopalan Srinivasan
DOI: 10.1002/MOP.28195
关键词: Mechanical filter 、 Optoelectronics 、 Waveguide filter 、 Dielectric 、 All-pass filter 、 Materials science 、 Dielectric resonator 、 Electrical engineering 、 Low-pass filter 、 Insertion loss 、 Center frequency
摘要: The nature of dielectric resonance and its utility for a magnetic field tunable band-pass filter have been studied in polycrys- talline disk nickel ferrite. lowest order mani- fests as two modes corresponding to clockwise counter-clockwise polarization the microwave fields. Under influence static perpendicular plane, one show decrease frequency whereas other shows an increase frequency. With increasing H, separation increases. Band-pass filters operation at 19, 30, 35 GHz designed character- ized. central has controlled with proper choice dimensions. is tuned by 2-7%. As well above ferromagnetic expected fields, overall losses are small insertion loss ranging from 2 5 dB. Theoretical estimates H- tuning pass-band much higher than measured values, indicative potential further improvement performance. ferrite importance use K Ka-band communication devices. V C 2014 Wiley Periodicals, Inc. Micro- wave Opt Technol Lett 56:814-818, 2014; View this article online wileyonlinelibrary.com. DOI 10.1002/mop.28195 K- Ka-frequency bands discussed here. advantage low loss, 4 6 dB, excellent power handling capability (expected resonators) moderate that possible only ferrites. can be 2-7% H. A theory here H-tuning resonator pass-band. It shown estimated ranges values could range characteristics filter. 2. EXPERIMENT
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