Nkhani

Nthawi: 2021-11-10

A fyuluta ya band-passntchito:

Fyuluta yoyenera iyenera kukhala ndi passband yosalala kwathunthu, mwachitsanzo, palibe kuwonjezeka mu passband kapena kuchepa kwa ma frequency onse kunja kwa passband kumachepa kwathunthu. Kuphatikiza apo, kusintha kwa passband mu frequency yaying'ono kwambiri kuti ithe. Ndipotu, palibe fyuluta yoyenera ya band-pass. Fyulutayo singathe kuyembekezera kuti ma frequency onse kunja kwa frequency achepa kwathunthu, makamaka, pali band yomwe iyenera kuchepetsedwa koma osati yosiyana. Izi nthawi zambiri zimatchedwa fyuluta roll-off phenomenon, ndipo attenuation mu dB pa khumi imayimira. Kawirikawiri, kapangidwe ka fyuluta kamayesetsa kuwonetsetsa kuti rolloff imachepetsa kukula kwa magwiridwe antchito abwino a fyuluta yotereyi. Komabe, pamene roll-off range ikucheperachepera, pass-band siilinso yosalala - inayamba kuwoneka ngati "yosweka". Chochitikachi chikuwonekera makamaka m'mphepete mwa passband, izi zimatchedwa Gibbs phenomenon.

Fyuluta ya m'mimba

Fyuluta ya cavity ndi fyuluta ya microwave yokhala ndi kapangidwe ka cavity yolumikizana. Cavity ikhoza kufanana ndi inductance yomwe imagwirizana ndi capacitor kuti ipange gawo lolumikizana kuti igwire ntchito yosefera ya microwave. Poyerekeza ndi mitundu ina ya zosefera za microwave, fyuluta ya cavity ili ndi kapangidwe kolimba, magwiridwe antchito okhazikika komanso odalirika, mtengo wapamwamba wa Q, kutentha bwino, ndipo bandeji yake yapamwamba ya parasitic ili kutali kwambiri. Chifukwa chake, kusefera kwa cavity kumagwiritsidwa ntchito m'malo akuluakulu olumikizirana. Kugwiritsa ntchito chipangizochi ndikofala kwambiri.

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Tikhozanso kusintha zinthu za rf passive malinga ndi zomwe mukufuna. Mutha kulowa patsamba losinthira kuti mupereke zofunikira zomwe mukufuna.
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