Nguva : 2021-11-10
A band-pass sefaanoshanda:
Iyo yakanaka sefa inofanirwa kunge ine yakazara flat passband, semuenzaniso, hapana kuwana mupassband kana attenuation pane ese mafrequencies kunze kwepassband inodzikamisa zvachose Mukuwedzera, kutendeuka kwepasi-bhendi mune shoma shoma frequency renji kuti ipedze. Muchokwadi, hapana chakanakira bhendi-pass sefa. Iyo sefa haikwanise kutarisira ese mafrequency kunze kweiyo frequency renji inodzikamisa zvachose, kunyanya, pane bhendi rinofanirwa kudzikiswa asi risiri rega rega. Izvi zvinowanzo nzi sefa yekudonha-kubvisa chiitiko, uye attenuation mudB pamakore gumi kumiririra. Kazhinji, iyo sefa dhizaini inoedza kuona kuti iyo rolloff inopfupisa chiyero chekuita kurinani kweiyo sefa dhizaini padhuze. Zvisinei, ne-roll-off range iri kuita duku uye duku, pass-band haisisiri flat - yakatanga kuonekwa "ripple". Ichi chiitiko chinonyanya kuoneka mupassband edge, chiitiko ichi chinonzi Gibbs phenomenon.
The cavity filter is microwave filter ine resonant cavity structure. Iyo mhango inogona kuenzana neiyo inductance inoenderana necapacitor kuti igadzire nhanho ine resonant yekuona iyo microwave kusefa basa. Kuenzaniswa nemamwe marudzi emafirita e microwave, iyo cavity filter ine chimiro chakasimba, yakagadzikana uye yakavimbika kuita, yakakwira Q kukosha, yakanaka kupisa kupisa, uye yayo yepamusoro-yekupedzisira parasitic passband iri kure. Naizvozvo, kusefa kwemukati kunoshandiswa mumakuru ekutaurirana. Iko kushandiswa kwechigadzirwa kwakajairika.
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Isu tinogona zvakare kugadzirisa iyo rf passive zvikamu zvinoenderana nezvaunoda. Iwe unogona kupinda peji rekugadzirisa kuti upe zvakatemwa zvaunoda.
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Nguva yekutumira: Nov-18-2021
