WR28-WR22 inzibacyuho 30.0-40.0 GHz 25.4mm WR4-WR5 inzibacyuho 140-260 GHz 25.4mm WR28-WR22 inzibacyuho 140-260 GHz 25.4mm WR112-WR90 inzibacyuho 8.2-10GHz 25.4mm WRD750 yagoretse umurongo wa 8-18GHz