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1、杭州电子科技大学硕士学位论文powerismorethan12W,andpowergainisbiggerthan15dB,andPAEishighthan45%.Whenbackingoff6dBofoutputpower,thepoweraddedefficiency(PAE)canstillachieve38%.ThebalancedpoweramplifierwiththesameworkingfrequencybroadbandworkingonthelargesignalcangetthePAEof42%whenitissaturated,bu
2、twhenthesaturatedoutputpowerisbackedoff6dB,PAEisreducedto25.5%.WorkinginKubandthathasveryhighfrequency,thePAEofthedesignedDohertypoweramplifieris12.5%higherthanthatofthebalancedpoweramplifieranditshowsthatthedesignedDohertypowerhasagoodperformance.Theresultsofthesimulationshowthat
3、thedesignedDohertypoweramplifierhasachievedtheexpectedspecifications.Duringprocessingandtesting,firstly,mainpoweramplifierinthepowerstageofthedesignedDohertypoweramplifierisprocessed.Thenacircuitisdesignedthatusedforpower-onsequenceprotectionusingAltiumDesignersoftware.Whenpoweram
4、plifieristested,thetransistorcanbeprotectedeffectivelywiththeprotectioncircuit.Then,basedonthesizeofmainpoweramplifierandensuringnotgeneratingself-resonantfrequency,ashiedcaseusedtotestpoweramplifier,shiedelectromagneticanddissipateheatisdesignedusingAutoCADsoftware.Thenthemainpow
5、eramplifiermoduleistestedandtheanalysesofthetestedandsimulatedresultsaregiven.ThedesignedDohertypoweramplifiercanbeadjustedbasedontheanalysisandsummaryandthenagoodperformanceofthesubsequentlyprocessedDohertypoweramplifiercanbeensured.Keywords:GaNHEMT,Dohertypoweramplifier,modeling
6、,Wilkinsondivision,protectioncircuitIV杭州电子科技大学硕士学位论文目录摘要...............................................................................................................................................IABSTRACT.........................................................................
7、..............................................................III第1章绪论........................................................................................................................................11.1课题研究的背景与意义.............................................................
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