Ang WR19 rectangular waveguide terminal gipares nga load 40-60GHz 28-31GHz waveguide Harmonic Bandstop Filter Ang WR15 rectangular waveguide terminal gipares nga load 50-75GHz WR28 waveguide-coaxial adapter18-26.5GHz WR430 Waveguide Switch 1.72~2.61GHz WR90 standard welded waveguide flange Ang WR15 rectangular waveguide terminal gipares nga load 50-75GHz Ang WR19 rectangular waveguide terminal gipares nga load 40-60GHz Ang WR22 rectangular waveguide terminal gipares nga load 33-50GHz WR22 waveguide-coaxial adapter 33-50GHz WR28 waveguide-coaxial adapter18-26.5GHz