Norsat Ku-Band OMT and Transmit Reject Filter The Norsat Ku-Band OMT and Filter is a highly integrated three port assembly, combining an OMT with a transmit reject filter and elbow. Norsat Ku-Band OMT and Transmit Reject Filter The Norsat Ku-Band OMT and Filter is a highly integrated three port assembly, combining an OMT with a transmit reject filter and elbow.