WR28-WR22 pandu gelombang peralihan 30.0-40.0 GHz 25.4mm WR4-WR5 pandu gelombang peralihan 140-260 GHz 25.4mm WR28-WR22 pandu gelombang peralihan 140-260 GHz 25.4mm WR112-WR90 pandu gelombang peralihan 8.2-10GHz 25.4mm WRD750 pandu gelombang berpintal 8-18GHz