WR19 rectangular waveguide terminal yofanana ndi 40-60GHz 28-31GHz waveguide Harmonic Bandstop Fyuluta WR15 rectangular waveguide terminal yofanana ndi katundu 50-75GHz WR28 waveguide-coaxial adaputala18-26.5GHz WR430 Waveguide Switch 1.72 ~ 2.61GHz WR90 standard welded waveguide flange WR15 rectangular waveguide terminal yofanana ndi katundu 50-75GHz WR19 rectangular waveguide terminal yofanana ndi 40-60GHz WR22 rectangular waveguide terminal yofanana ndi 33-50GHz WR22 waveguide-coaxial adaputala 33-50GHz WR28 waveguide-coaxial adaputala18-26.5GHz