中国空间科学技术

›› 2017, Vol. 37 ›› Issue (2): 89-95.doi: 10.16708/j.cnki.1000-758X.2017.0036

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Multipactorsimulationalgorithmbasedonfinitedifferenceintimedomain

 ZHANG  Jian-Feng1, YOU  Jian-Wei1, WANG  Hong-Guang2, LI  Yun1, CUI  Wan-Zhao3, CUI  Tie-Jun1,*   

  1. 1StateKeyLaboratoryofMillimeterWaves,  SoutheastUniversity,  Nanjing210096，China
    2KeyLaboratoryforPhysicalElectronicsandDevicesoftheMinistryofEducation,  Xi′anJiaotongUniversity,Xi′an710049，China
    3NationalKeyLaboratoryofScienceandTechnologyonSpaceMicrowave,  ChinaAcademyofSpaceTechnology(Xi′an),  Xi′an710110，China
  • Received:2016-08-31 Revised:2017-03-07 Published:2017-04-25 Online:2017-03-17

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Abstract: Traditionalmultipactorpredictionmethodbasedonplaneapproximationisfastbutinaccurate,whichcannotmeettheelectricalperformancedesignrequirementswhendevicesbecomemoreandmorecomplex.Thefinitedifferencetimedomainalgorithmisoneofthemostpopularmethodsinthecomputationalelectromagnetics.TheparticletracingalgorithmisanumericalmethodbasedontheNewton'sforcelaw. Thetwoalgorithmscanbeselfconsistentlycombinedbythediscretemeshinbothtimeandspacedomains,whichcanbeusedtopredictthemultipactorbreakdownthreshold.Inaddition,theconformalandparallelizingtechnologieswerewellstudied.Multipactorbreakdownofclassicmicrowavedevicewasanalyzedbythedevelopedalgorithm.Theerroris0.3dBcomparedwiththeexperimentsandthemaximumparallelefficiencyis83%,whichdemonstratetheaccuracyandefficiencyofthealgorithm.

Key words: finitedifferencetimedomain, particletracing, multipactor, conformal, parallelization