Sefa ya Narrow-Band-Yogawanika Kuchokera Kusefa ya Band-Pass

Kutumiza kwapamwamba kumatanthawuza kufalikira kwapamwamba kwambiri kwa fyuluta ya bandpass mu passband.Zofunikira pakutumiza kwapamwamba zimasiyanasiyana kutengera ntchito.Pazofunika za kuponderezana kwa phokoso ndi kukula kwa chizindikiro, ngati mumvetsera kwambiri kukula kwa chizindikiro, mukuyembekeza kuwonjezera mphamvu ya chizindikiro.Pankhaniyi, muyenera kutumizirana mwachangu pachimake.Ngati musamala kwambiri kuponderezana kwa phokoso, mukuyembekeza kupeza chiwongolero chapamwamba cha ma signal-to-noise Ratio, mutha kuchepetsa zofunikira zina zapamtunda, ndikuwonjezera zofunikira zakuya.

Mtundu wodulidwa umatanthawuza kutalika kwa kutalika komwe kumafuna kudulidwa kuwonjezera pa chiphaso.Kwa zosefera za narrowband, pali gawo la cutoff lakutsogolo, ndiko kuti, gawo lomwe lili ndi cutoff wavelength yaying'ono kuposa kutalika kwapakati, ndi gawo lalitali la cutoff, lomwe lili ndi gawo lomwe lili ndi cutoff wavelength kuposa kutalika kwapakati.Ngati agawika, magulu awiri odulidwawo ayenera kufotokozedwa mosiyana, koma kawirikawiri, mtundu wodulidwa wa fyuluta ukhoza kudziwika potchula utali wamfupi kwambiri ndi kutalika kwake komwe fyuluta yopapatiza iyenera kudula. kuzimitsa.

Kuzama kodulidwa kumatanthawuza kufalikira kwakukulu komwe kumalola kuwala kudutsa muzoni yodulidwa.Machitidwe osiyanasiyana ogwiritsira ntchito ali ndi zofunikira zosiyana pakuzama kodulidwa.Mwachitsanzo, ngati kuwala kwa fulorosisi yosangalatsa, kuya kwake kumafunika kukhala pansi pa T.<0.001%.M'machitidwe wamba owunikira ndi kuzizindikiritsa, kuya kwakuya T<0.5% nthawi zina ndizokwanira.