›› 2016, Vol. 36 ›› Issue (2): 46-.doi: 10.16708/j.cnki.1000-758X.2016.0023

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Directcouplingmatrixsynthesistechniqueforfilterswithnonresonatingnodes

LIU  Hao, LI  Sheng-Xian   

  1. ChinaAcademyofSpaceTechnology(Xi′an),Xi′an710000,China
  • Received:2015-10-23 Revised:2015-12-11 Online:2016-04-25 Published:2016-02-24

Abstract: Animproveddirectcouplingmatrixsynthesistechniquewaspresentedbasedonthetheoryofnonresonatingnodes.Bytreatingnonresonatingnodesasresonatingnodes,thecouplingmatrixwasobtainedusingthecanonicalsynthesis.Thensimilartransformwasconductedto  thematrixsothattheelementscorrespondingtothelocationofnonresonatingnodescontainnoinformationontransmissionzeros.〖JP2〗Andproportionaltransformwasconductedtotherowsandcolumnsoftheelements,sothefilternetworkincludednonresonatingnodesagain.Thenthematrixwhichmaybeusedtodesignthefilterswithnonresonatingnodeswasobtained.Themethodsimplifiesthesynthesis,reconfigurationandsimulationoffilterswithnonresonatingnodes.SimulationresultsinMATLABandHFSSprovethesynthesistechniquereasonableandfeasible.

Key words: filter;couplingmatrix, nonresonatingnode, resonatingnode, similaritytransformation, transmissionzero