EMS Technologies signed a $13 million contract with Northrop for the extremely high frequency (EHF) satellite communications system for the U.S. Air Force’s B-2 stealth bomber. EMS said, under a planned upgrade program, the EHF system will allow the B-2 to send and receive battlefield information up to 100 times faster than its current ultra-high frequency (UHF) satellite communications system. The Air Force plans to retrofit all 20 B-2’s flying today with the EHF system. With developmental items, production units and spares, the contracts are expected to include a total of about 30 systems.