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