WR19 rectangular waveguide terminal inofananidzwa mutoro 40-60GHz 28-31GHz waveguide Harmonic Bandstop Sefa WR15 rectangular waveguide terminal inoenderana nemutoro 50-75GHz WR28 waveguide-coaxial adapter18-26.5GHz WR430 Waveguide Switch 1.72 ~ 2.61GHz WR90 yakajairwa welded waveguide flange WR15 rectangular waveguide terminal inoenderana nemutoro 50-75GHz WR19 rectangular waveguide terminal inofananidzwa mutoro 40-60GHz WR22 rectangular waveguide terminal inoenderana nemutoro 33-50GHz WR22 waveguide-coaxial adapta 33-50GHz WR28 waveguide-coaxial adapter18-26.5GHz