寬帶模擬預(yù)失真技術(shù)的研究.pdf

1、東南大學(xué)碩士學(xué)位論文寬帶模擬預(yù)失真技術(shù)的研究姓名：許勤賢申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電磁場與微波技術(shù)指導(dǎo)教師：錢澄20050301Abstract欠bstractWiththerapiddevelopmentofwirelesscommunicationthelinearmodulationmethodsarewidelyusedSincetheenvelopeofmodulatedsigrlalfluctuates，thesemethod

2、sgenerateunwantedintermodulationdistortionproductsinanonlinearpoweramplifierSoitisnecessarytouselinearizationtechniquetoreducetheadjacentchannelinterferencePredistortionisawidelyusedlinearizationtechniquebecauseofitsuniq

3、ueadvantage，andtheresearchofpredistortinglinearizerisbecomingthehotresearchfieldInthispaperbasedontheanalysisofthenonlinearityofpoweramplifier，thetheoryandrealizationmethodsofpredistortiontechniquealeanalyzed，thenananalo

4、gpredistorter誦thwidefrequencybandwidthisproposedAnd，themaincircuits，suchaspowerdividerwideband3dBquadraturecoupler，widebandreflectiontypelowphase—shiftattenuatorwidebandreflectiontype360degreephaseshifterareanalyzedandde

5、signedWiththetwomethodsofnewbranchlinestructureandlumpedelement，thebandwidthofcouplershowsover42％，whileonly10％fortraditionalcouplerTheattenuatorhaslowphaseshiftandgoodreflectioncharacteristicsThephaseshifterhaslowinserti