Toinvestigatethefeasibilityforahelicallinetobeusedasapulseformingline(PFL),thetransmissioncharacteristicsofthehelicaltransmissionlineisstudiedboththeoreticallyandexperimentally.Theresultsindicatethatitisfeasibletoemployahelicallineasalong-pulsePFL,andtheinfluenceofitsdispersionisnegligible.ComparedwithaconventionalcoaxialPFL,thehelicalPFLwiththesamesizecanproducealongerpulse.