HL-2Atokamakwillbeequippedwitha75GHz/1MW/1sECRHsystem.Thepaperdescribesthedesignofthetransmissionsystem(Fig.1),whichismadeupwithatransmissionline,anequatoriallauncher.Thepaperdescribesthedesignofmaincomponentsofthesystemsuchas,waveguides,ellipsoidalsurfacemirrors,achemicalvapor(CVD)diamondwindow,asteeringmirror.