WR19 terminal waveguide rectangular cocog beban 40-60GHz 28-31GHz Waveguide Harmonic Bandstop Filter WR15 terminal waveguide rectangular cocog beban 50-75GHz WR28 waveguide-coaxial adapter18-26.5GHz WR430 Waveguide Pindah 1.72~2.61GHz WR90 baku dilas waveguide flange WR15 terminal waveguide rectangular cocog beban 50-75GHz WR19 terminal waveguide rectangular cocog beban 40-60GHz WR22 terminal waveguide rectangular cocog beban 33-50GHz WR22 waveguide-coaxial adaptor 33-50GHz WR28 waveguide-coaxial adapter18-26.5GHz