A gaban alamar aikin ƙirar ƙirar RF, ɗayan kalmomin gama gari shine "dB". Ga injiniyan RF, dB wani lokaci ya saba da sunansa. dB yanki ne na logarithmic wanda ke ba da hanya mai dacewa don bayyana ma'auni, kamar rabo tsakanin siginar shigarwa da siginar fitarwa.
Tun da dB rabo ne, yanki ne na dangi, ba cikakke ba. Ana auna ƙarfin siginar kwata-kwata, domin a koyaushe muna faɗin bambancin yuwuwar, wato, bambancin da ke tsakanin maki biyu; Yawancin lokaci muna komawa zuwa yuwuwar kumburi dangane da kumburin ƙasa na 0 V. Hakanan ana auna siginar na yanzu kwata-kwata, tunda naúrar (ampere) ta ƙunshi ƙayyadaddun adadin caji don takamaiman adadin lokaci. Sabanin haka, dB raka'a ce da ta ƙunshi logarithm na rabo tsakanin lambobi biyu. Misali, ribar amplifier: Idan ikon siginar shigarwa shine 1 W kuma ƙarfin siginar fitarwa shine 5 W, rabon shine 5, wanda ke juyawa zuwa dB shine 6.9897dB.
Saboda haka, amplifier yana ba da damar samun wutar lantarki na 7dB, wato, rabo tsakanin ƙarfin siginar fitarwa da ƙarfin siginar shigarwa za a iya bayyana shi azaman 7dB.
Me yasa ake amfani da dB?
Tabbas yana yiwuwa a ƙira da gwada tsarin RF ba tare da amfani da dB ba, amma a zahiri, dB yana da yawa. Ɗayan fa'ida ita ce ma'aunin dB yana ba mu damar bayyana ma'auni masu girma ba tare da amfani da lambobi masu yawa ba: 1,000,000 yana da ikon samun 60dB kawai. Bugu da kari, jimlar riba ko asarar siginar siginar tana cikin yankin dB kuma yana da sauƙin ƙididdigewa saboda ana ƙara adadin dB ɗaya kawai (yayin da idan muka yi amfani da ma'auni na yau da kullun, ana buƙatar ninkawa).
Wani fa'ida shine abin da muka saba da shi daga gwanintar masu tacewa. Tsarin RF ya ta'allaka ne akan mitoci da hanyoyi daban-daban waɗanda ake ƙirƙira mitoci, sarrafawa, ko shafar abubuwan da aka gyara da abubuwan da'ira. Ma'auni na dB ya dace a cikin irin wannan mahallin saboda makircin amsawar mitar yana da hankali kuma yana ba da bayanai na gani lokacin da mitar mitar ta yi amfani da ma'auni na logarithmic kuma amplitude axis yana amfani da sikelin dB.
Saboda haka, a cikin aiwatar da zayyana tace, ya zama dole a yi taka tsantsan.
We can design and produce customized filters for you, any questions you may have please contact us: sales@cdjx-mw.com
Lokacin aikawa: Maris-04-2022
