Open AccessВысокоселективный полосно-пропускающий фильтр на резонаторах с двухсторонним рисунком полосковых проводников на подвешенной подложке
Author(s) -
Б.А. Беляев,
А.М. Сержантов,
Я.Ф. Бальва,
Ан.А. Лексиков,
Е.О. Грушевский
Publication year - 2019
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2019.10.47749.17703
Subject(s) - passband , stopband , stripline , resonator , band pass filter , stub (electronics) , attenuation , bandwidth (computing) , physics , conductor , oscillation (cell signaling) , optics , materials science , electronic engineering , telecommunications , engineering , biology , composite material , genetics
New resonator design employing a hairpin stripline conductor with a stub situated on one side of a dielectric substrate and regular stripline conductors (connected to a screen) on the other side. Eigenfrequencies of the first three oscillation modes of this resonator can be made closer to each other, so that the resonances of two modes are involved in the formation of the passband while the third mode resonance forms a minimum of the transmission coefficient adjacent to the passband. A structure comprising four resonators of this type has the characteristic of an eighth-order bandpass filter arranged in a case with 45 × 16 × 6.25-mm internal dimensions possessing f _0 = 0.52 GHz central frequency with a 14% relative bandwidth. The filter is highly selective due to the attenuation poles being close to the pass band and a wide high-frequency stopband extending above a fivefold f _0 value at a level of –100 dB.