I-WR28-WR22 inguqu yesikhokelo samaza 30.0-40.0 GHz 25.4mm I-WR4-WR5 inguqu yesikhokelo samaza 140-260 GHz 25.4mm I-WR28-WR22 inguqu yesikhokelo samaza 140-260 GHz 25.4mm I-WR112-WR90 inguqu yesikhokelo 8.2-10GHz 25.4mm I-WRD750 ijije i-waveguide 8-18GHz