鐵氧體襯底微帶功分移相饋電網(wǎng)絡(luò)的設(shè)計研究.pdf

1、南京郵電大學(xué)碩士學(xué)位論文鐵氧體襯底微帶功分移相饋電網(wǎng)絡(luò)的設(shè)計研究姓名：何亮申請學(xué)位級別：碩士專業(yè)：電磁場與微波技術(shù)指導(dǎo)教師：張旭翔201103南京郵電大學(xué)碩士研究生學(xué)位論文AbstractIIAbstractWiththerapiddevelopmentofwirelesscommunicationmobileterminalisbecomingmemepopular.Microstripantennasbecauseofitssmal

2、lsizeeasyintegrationarewidelyusedinwirelesscommunicationdevicesespeciallyinphasedarrayapplications.Torealizeafourpatchesmicrostripphasedarraysanarrayfeederwkingat10GHzconsistedbyphaseshifterpowerdividerisdesignedasthefou

3、rpatchmicrostripantennaarrayfeeder.Thefeedwkisrealizedonanexternallymagizedferritesubstratetunablephaseshiftismadebychangingthemagicbiaswhichchangesthepermeabilityofferritematerial.Thevaryingofpermeabilityinturnchangesth

4、ephasevelocityaswellastheionphaseofthepropagatingmicrowavesignal.Inthispaperthefollowingwkshavebeendone.Firstlywiththeferritesubstratemicrostriplineunderbiasmagicfieldthetransmissionacteristicscouldbesummarizedasfollowin

5、g:1.Withexternalmagicfieldtheferritesubstratemicrostriplinecouldtransmitsignalwithchangingphaseacteristics.2.Matchingtheimpedancemicrowavesignalscouldbetransmittedbetweentwodifferentsubstratemedia.3.Beingappliedincertain

6、biasmagicferritetransmissionlinewillappearinacertainbabsptionofmicrowaveenergyresultinginthebreakofsignaltransmission.Secondlya10GHzTjunctionpowerdividerisdesigned.WithcutanglesoptimizationtheS11oftheoptimizedTjunctionre

7、aches25dBat10GHzisolationbetweenthetwooutputptscouldreaches7dB.Inadditiona10GHzwkingfrequencyWilkinsonpowerdividerisalsodesignedbysimulationsoftwareCSTMicrowaveStudio.Simulationwascarriedouttostudythetransmissionacterist

8、icsunderinfluenceoftheexternalbiasmagicfield.Finallythe10GHzmicrostrippatchantennasaredesigned.Thenasthebasicunitatwowayafourwayantennaarrayarebuilt.Throughthecomparisonofsimulationresultsweconcludethatwiththeincreaseoft

9、heantennaelementantennagainbecomeshighermainlobepatternbecomesmeacuteintheexperimentalresults.Connectingtheantennaarrayswiththefeedwksimulatinganalysingthephasedarrayradiationacteristicsofthetwofourelementphasedarrayresp