S H F FILTER Russian patent published in 1994 - IPC

FIELD: radio engineering. SUBSTANCE: length of beyond cutoff waveguide 2 is set between path waveguides 1, 13. Dielectric inserts 3-7 of resonance dimensions are positioned along axis of length of beyond cutoff waveguide, they are adjusted by means of metal screws 8-12. On working frequency of filter dielectric inserts 3-7 form chain of coupled resonators which closest parasitic oscillations are matched with critical frequency of length of beyond cutoff waveguide 2 thanks to selection of their dimensions. EFFECT: improved operational characteristics. 1 dwg