Matatun Wucewa Masu Wucewaana iya yin ta hanyar haɗa matatar mai ƙarancin wucewa tare da matatar mai wucewa mai yawa
Ana iya amfani da matatar Passive Band Pass don ware ko tace wasu mitoci da ke cikin wani takamaiman band ko kewayon mitoci. Ana iya sarrafa mitocin yankewa ko wurin ƒc a cikin matatar RC mai sauƙi ta hanyar amfani da resistor guda ɗaya kawai a jere tare da capacitor mara polarized, kuma dangane da hanyar da aka haɗa su, mun ga ko dai an sami matatar Low Pass ko High Pass.
Amfani ɗaya mai sauƙi ga waɗannan nau'ikan matatun mai aiki ba tare da amfani ba shine a cikin aikace-aikacen amplifier na sauti ko da'irori kamar a cikin matatun mai haɗuwa da lasifika ko sarrafa sautin pre-amplifier. Wani lokaci yana da mahimmanci a wuce wasu nau'ikan mitoci waɗanda ba sa farawa a 0Hz, (DC) ko ƙarewa a wani babban matsayi na mitoci amma suna cikin wani takamaiman kewayon ko band na mitoci, ko dai kunkuntar ko faɗi.
Ta hanyar haɗawa ko "juyawa" da'irar Low Pass Filter guda ɗaya tare da da'irar High Pass Filter, za mu iya samar da wani nau'in matattarar RC mai wucewa wanda ke wucewa da zaɓaɓɓun kewayon ko "band" na mitoci waɗanda za su iya zama kunkuntar ko faɗi yayin da suke rage duk waɗanda ke wajen wannan kewayon. Wannan sabon nau'in matattarar mai wucewa yana samar da matattarar mai zaɓin mita wanda aka fi sani da Matattarar Band Pass ko BPF a takaice.
Ba kamar matattarar ƙarancin wucewa ba wadda ke wucewa kawai da siginar ƙarancin mita ko matattarar babban wucewa wadda ke wucewa da siginar matsakaicin mita, matattarar Band Pass tana wucewa da sigina a cikin wani takamaiman "band" ko "yaduwa" na mita ba tare da karkatar da siginar shigarwa ko gabatar da ƙarin hayaniya ba. Wannan band na mita na iya zama kowace faɗi kuma an fi sani da matattarar Bandwidth.
Ana bayyana girman bandwidth a matsayin kewayon mitar da ke tsakanin takamaiman wuraren yanke mita guda biyu (ƒc), waɗanda suke 3dB ƙasa da matsakaicin tsakiya ko kololuwar amsawa yayin da suke rage ko raunana sauran da ke wajen waɗannan maki biyu.
To, ga mitoci da aka yaɗa sosai, za mu iya bayyana kalmar "bandwidth", BW a matsayin bambanci tsakanin mitoci da aka yanke ƙasa (ƒcLOWER) da kuma mitoci da aka yanke mafi girma (ƒcHIGHER). A wata ma'anar, BW = ƒH – ƒL. A bayyane yake cewa domin matatar da aka yanke ta yi aiki daidai, mitoci da aka yanke na matatar da aka yanke ƙasa dole ne su fi mitoci da aka yanke don matatar da aka yanke babba.
Ana iya amfani da matatar wucewa ta Band "mafi kyau" don ware ko tace wasu mitoci da ke cikin wani takamaiman rukunin mitoci, misali, soke hayaniya. Matatun wucewa ta Band galibi ana kiransu matatun tsari na biyu, (sanduna biyu) saboda suna da bangaren amsawa na "biyu", wato capacitors, a cikin ƙirar da'irar su. Capacitor ɗaya a cikin da'irar wucewa ta ƙasa da kuma capacitor ɗaya a cikin da'irar wucewa ta sama.
Tsarin Bode ko lanƙwasa amsawar mita a sama yana nuna halayen matattarar wucewar band. A nan siginar tana raguwa a ƙananan mitoci tare da fitarwa yana ƙaruwa a gangaren +20dB/Decade (6dB/Octave) har sai mitar ta kai ga "ƙasa da yankewa" ƒL. A wannan mitar, ƙarfin fitarwa ya sake zama 1/√2 = 70.7% na ƙimar siginar shigarwa ko -3dB (20*log(VOUT/VIN)) na shigarwar.
Fitowar ta ci gaba da samun riba mafi girma har sai ta kai ga ma'aunin "babban yankewa" ƒH inda fitarwa ke raguwa a ƙimar -20dB/Decade (6dB/Octave) wanda ke rage duk wata siginar mita mai yawa. Ma'aunin ribar fitarwa gabaɗaya shine matsakaicin ma'aunin geometric na ƙimar -3dB guda biyu tsakanin ƙananan da manyan wuraren yankewa kuma ana kiranta ƙimar "Mitar Tsakiya" ko "Kololuwar Resonant" ƒr. Ana ƙididdige wannan ƙimar geometric a matsayin ƒr 2 = ƒ(SAMAN) x ƒ(ƘASA).
AMatatar wucewa ta bandAna ɗaukarsa a matsayin matattara ta nau'in tsari na biyu (mai sanduna biyu) saboda yana da abubuwan da ke amsawa "biyu" a cikin tsarin da'irarsa, to kusurwar mataki za ta ninka ta matattara ta farko da aka gani a baya, watau, 180o. Kusurwar mataki ta siginar fitarwa LEADs na shigarwar ta +90o har zuwa tsakiyar ko mitar amsawa, ƒr ma'ana idan ya zama digiri "sifili" (0o) ko "a-phase" sannan ya canza zuwa LAG shigarwar ta -90o yayin da mitar fitarwa ke ƙaruwa.
Ana iya samun maki na sama da ƙasa na yankewar mitar matatar wucewa ta band ta amfani da dabara iri ɗaya kamar ta matatar wucewa ta ƙasa da ta sama, misali.
Na'urorin suna zuwa daidaitacce tare da haɗin SMA ko N mata, ko haɗin 2.92mm, 2.40mm, da 1.85mm don abubuwan da ke cikin mita mai yawa.
Haka kuma za mu iya keɓance matatar Band Pass bisa ga buƙatunku. Kuna iya shigar da shafin keɓancewa don samar da takamaiman bayanai da kuke buƙata.
Lokacin Saƙo: Satumba-06-2022
