REJECTION FILTER Russian patent published in 1995 - IPC

FIELD: SHF technology. SUBSTANCE: rejection filter includes input and output sections 1 of coaxial transmission line, section 2 of strip transmission line having current-carrying conductor 3 on dielectric substrate 4, inductive elements 5, gyromagnetic resonators 6, pole pieces 7 of magnetic system, capacitive elements 8. Inductive elements 5 are manufactured in the form of strip transmission line in which strip is bent as arc lying within sector of angles from 3/4 up to 3/23/2π providing for heavy coupling necessary for operation of filter. This makes it possible to obtain with proper selection of value of elements 8 cut-off frequency of low-pass filter 1.5-2.0 times higher than in known filter. It also leads to expansion of range of retuning. Through holes housing gyromagnetic resonators 6 on separation boundary "dielectric substrate-air" are made in dielectric substrate 4 at points corresponding to centers of arcs of conductor 3. As a result concentration of SHF field in region of gyromagnetic resonators 6 increases. EFFECT: increased working frequency and re-tuning range. 1 dwg