Terfynell waveguide hirsgwar WR19 paru llwyth 40-60GHz 28-31GHz waveguide Hidlydd Bandstop Harmonig Terfynell waveguide hirsgwar WR15 paru llwyth 50-75GHz WR28 waveguide-coaxial adapter18-26.5GHz Switsh Waveguide WR430 1.72 ~ 2.61GHz Fflans waveguide weldio safonol WR90 Terfynell waveguide hirsgwar WR15 paru llwyth 50-75GHz Terfynell waveguide hirsgwar WR19 paru llwyth 40-60GHz Terfynell waveguide hirsgwar WR22 paru llwyth 33-50GHz Addasydd waveguide-coaxial WR22 33-50GHz WR28 waveguide-coaxial adapter18-26.5GHz