Phambi kwesalathi seprojekthi yoyilo lweRF, elinye lawona magama aqhelekileyo ngu “dB”. Kwinjineli yeRF, i-dB ngamanye amaxesha iqhelekile njengegama layo. I-dB yiyunithi ye-logarithmic ebonelela ngendlela efanelekileyo yokubonisa umlinganiselo, njengomlinganiselo phakathi komqondiso wegalelo kunye nomqondiso wemveliso.
Kuba i-dB iyireyishini, yiyunithi ezalanayo, hayi ngokupheleleyo. I-voltage yesiginali ilinganiswa ngokupheleleyo, kuba sihlala sithetha umahluko onokuthi ubekho, oko kukuthi, umahluko onokubakho phakathi kwamanqaku amabini; Ngokuqhelekileyo sibhekisela kwikhono le-node ehambelana ne-0 V ye-node yomhlaba. I-current ye-signal iphinda ilinganiswe ngokupheleleyo, ekubeni iyunithi (i-ampere) ibandakanya inani elithile lentlawulo yexesha elithile. Ngokwahlukileyo, i-dB yiyunithi ebandakanya i-logarithm yomlinganiselo phakathi kwamanani amabini. Ngokomzekelo, ukuzuza kwe-amplifier: Ukuba amandla omqondiso wegalelo ngu-1 W kunye namandla omqondiso wokuphuma ngu-5 W, umlinganiselo ngu-5, oguqulela kwi-dB yi-6.9897dB.
Ngoko ke, i-amplifier ibonelela ngokufumana amandla e-7dB, oko kukuthi, umlinganiselo phakathi kwamandla omqondiso wokuphuma kunye namandla omqondiso wegalelo unokubonakaliswa njenge-7dB.
Kutheni usebenzisa i-dB?
Ngokuqinisekileyo kuyenzeka ukuyila kunye nokuvavanya iinkqubo zeRF ngaphandle kokusebenzisa i-dB, kodwa eneneni, i-dB ikhona yonke indawo. Enye inzuzo kukuba isikali se-dB sisivumela ukuba sibonise umlinganiselo omkhulu kakhulu ngaphandle kokusebenzisa amanani amakhulu kakhulu: i-1,000,000 inenzuzo yamandla ye-60dB kuphela. Ukongeza, inzuzo iyonke okanye ilahleko yetsheyini yomqondiso ikwidomeyini ye-dB kwaye kulula ukubala kuba amanani e-dB ngamnye adityaniswa ngokulula (nangona ukuba sisebenzisa umlinganiselo oqhelekileyo, ukuphindaphinda kuyafuneka).
Enye inzuzo yinto esiyiqhelileyo kumava okucoca. Iisistim ze-RF zijikeleza iifrikhwensi kunye neendlela ezahlukeneyo apho iifrikhwensi zenziwa, zilawulwe, okanye zichatshazelwe ngamacandelo kunye namalungu esekethe yeparasitic. Isikali se-dB sifanelekile kumxholo onjalo kuba iploti yokuphendula rhoqo inomdla kwaye inolwazi olubonakalayo xa i-axis frequency isebenzisa isikali se-logarithmic kunye ne-axis ye-amplitude isebenzisa isikali se-dB.
Ngoko ke, kwinkqubo yokuyila isihluzi, kuyimfuneko ukuba uqaphele kakhulu.
We can design and produce customized filters for you, any questions you may have please contact us: sales@cdjx-mw.com
Ixesha lokuposa: Mar-04-2022
