Kimsis, Karlis, Janis Semenjako, and Yury V. Shestopalov. 2020. “Effectively Tunable Bandpass Waveguide Filter Based on Incorporation of Coupled Cylindrical Resonators Cut in Half”. Electrical, Control and Communication Engineering 16 (2): 78-87. https://doi.org/10.2478/ecce-2020-0012.