WR19 rjochthoekige waveguide terminal matched load 40-60GHz 28-31GHz waveguide Harmonyske Bandstop Filter WR15 rjochthoekige waveguide terminal matched load 50-75GHz WR28 waveguide-koaksiale adapter 18-26.5GHz WR430 Waveguide Switch 1.72 ~ 2.61GHz WR90 standert laske waveguide flange WR15 rjochthoekige waveguide terminal matched load 50-75GHz WR19 rjochthoekige waveguide terminal matched load 40-60GHz WR22 rjochthoekige waveguide terminal matched load 33-50GHz WR22 waveguide-koaksiale adapter 33-50GHz WR28 waveguide-koaksiale adapter 18-26.5GHz