Iamplifier yengxolo ephantsi isetyenziswa ngokubanzi njenge-high-frequency okanye i-intermediate-frequency preamplifier kwiindidi ezahlukeneyo zabamkeli bakanomathotholo, kunye nokukhulisa iisekethe zesixhobo sokubona i-elektroniki esinovakalelo oluphezulu. Xa ukhulisa imiqondiso ebuthathaka, ingxolo eyenziwa sisandisi-lizwi inokuphazamisana kakhulu nomqondiso. Ngoko ke, kuthenjwa ukunciphisa le ngxolo ukuphucula umlinganiselo wesignali-kwingxolo yemveliso. Ukuthotywa komlinganiselo wesignali ukuya kwingxolo obangelwa sisandisi-lizwi udla ngokubonakaliswa ngumfanekiso wengxolo F.
Izandisi zesandi esiphantsiziyingxenye ebalulekileyo yesiphaluka sommkeli, oqhuba kwaye uguqule isignali efunyenweyo kwingcaciso. Ii-LNA zenzelwe ukuba kufutshane nesixhobo esifumanayo ukuze kuncitshiswe ilahleko yophazamiseko. Banikela kuphela isixa esincinci sengxolo (idatha engasebenziyo) kwisignali efunyenweyo kuba nayiphi na enye iya kuthoba kakhulu isignali esele ibuthathaka. I-LNA isetyenziswa xa umlinganiselo we-signal-to-noise ratio (SNR) uphezulu kwaye kufuneka uncitshiswe malunga ne-50% ngelixa amandla esondiswa. Icandelo lokuqala lomamkeli ukuthintela umqondiso yi-LNA, nto leyo eyenza ibe yinto ebalulekileyo kwinkqubo yonxibelelwano.
Usetyenziso lwesandisi-lizwi esisezantsi
I-LNA iye yafumana uphuhliso lokuqala lwe-helium-cooled parametric amplifiers kunye ne-amplifiers yeparametric yobushushu begumbi. Ngophuhliso olukhawulezayo lwetekhnoloji, ithathelwe indawo yi-microwave-effect field transistor amplifiers kwiminyaka yakutshanje. Olu hlobo lweamplifier luneempawu ezibalaseleyo zobukhulu obuncinci, ixabiso eliphantsi, kunye nobunzima. Ngokukodwa ngokweempawu zamaza kanomathotholo, ineempawu zengxolo ephantsi, ibhendi yefrikhwensi ebanzi, kunye nenzuzo ephezulu. Isetyenziswe ngokubanzi kwiC, Ku, Kv, kunye nezinye iibhendi zamaza. Kwaye iqondo lobushushu bengxolo yeamplifiers ezisetyenziswa ngokuqhelekileyo ezinengxolo ephantsi ingaba ngaphantsi kwe-45K.
Iisandisi-lizwi esisezantsi (LNA)yenzelwe ikakhulu usetyenziso lwesiseko sesiseko sesiseko sonxibelelwano oluhambahambayo, njengamakhadi onxibelelwano lwe-transceiver, ii-amplifiers ezixhonywe kwi-tower-mounted (TMA), izihlanganisi, abaphindaphindayo, kunye nezixhobo ezikude / zedijithali ze-wireless head-end. Umfanekiso ophantsi wengxolo (NF, Noise Figure) ubeke umgangatho omtsha. Okwangoku, ushishino lweziseko ezingundoqo zonxibelelwano olungenazingcingo lujongene nomceli mngeni wokubonelela ngowona mgangatho ubalaseleyo wophawu kunye nokugubungela kwi-spectrum exineneyo. Uvakalelo lomamkeli yenye yezona mfuno zibaluleke kakhulu kuyilo lwendlela yokufumana isikhululo esisisiseko. Ukhetho olufanelekileyo lwe-LNA, ngokukodwa iNqanaba lokuqala le-LNA linokuphucula kakhulu ukusebenza kovakalelo lwabamkeli besikhululo sesiseko, kunye nesalathisi esiphantsi somsindo sikwayinjongo yoyilo oluphambili.
Ukuba unazo naziphi na iimfuno zeLNA, welcome to enquiry: sales@cdjx-mw.com.
Ixesha lokuposa: Jun-13-2023
