Awọn itọsọna igbi iyipada WR28-WR22 30.0-40.0 GHz 25.4mm Awọn itọsọna igbi iyipada WR4-WR5 140-260 GHz 25.4mm Awọn itọsọna igbi iyipada WR28-WR22 140-260 GHz 25.4mm Awọn itọsọna igbi iyipada WR112-WR90 8.2-10GHz 25.4mm WRD750 alayidayida waveguide 8-18GHz