Litaba

Nako: 2021-11-10

A sefepi sa band-passsebetsa:

Filter e loketseng e lokela ho ba le "passband" e bataletseng ka ho feletseng, mohlala, ha ho na phaello ea "passband" kapa "attenuation" ka linako tsohle ka ntle ho "passband" ka ho feletseng Ho phaella moo, phetoho ea "passband" ka mokhoa o fokolang haholo oa maqhubu o tla phethoa. Ha e le hantle, ha ho na sefe se loketseng sa band-pass. Sefefa ha se khone ho lebella hore maqhubu 'ohle a ka ntle ho sebaka sa marang-rang a fokotsehe ka ho feletseng, haholo-holo, ho na le sehlopha se lokelang ho fokotsoa empa se sa arohanngoa. Hangata sena se bitsoa "filter roll-off phenomenon", le ho fokotseha ho dB ka lilemo tse leshome ho emela. Ka tloaelo, moralo oa sefe o leka ho netefatsa hore rolloff e fokotsa boholo ba ts'ebetso e ntlafetseng ea moralo o joalo oa sefe. Leha ho le joalo, ka mefuta e mengata ea li-roll-off e ntse e fokotseha le e nyenyane, sehlopha sa pass-band ha se sa le sephara - se ile sa qala ho bonahala se "ripple". Ketsahalo ena e bonahala ka ho khetheha moeling oa passband, phello ena e bitsoa "phenomenon ea Gibbs".

Sesefa sa Cavity

Sesefa sa cavity ke sefe ea microwave e nang le sebopeho sa cavity resonant. Sekoti se ka lekana le inductance e bapileng le capacitor ho theha sethala sa resonant ho hlokomela ts'ebetso ea sefa ea microwave. Ha ho bapisoa le mefuta e meng ea li-filters tsa microwave, filthara ea cavity e na le mohaho o tiileng, ts'ebetso e tsitsitseng le e ka tšeptjoang, boleng bo phahameng ba Q, mocheso o motle oa ho senya mocheso, 'me phallo ea eona e phahameng ea parasitic e hole haholo. Ka hona, ho sefa cavity ho sebelisoa liteisheneng tse kholo tsa puisano. Tšebeliso ea sesebelisoa e tloaelehile haholo.

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