Cobham, which received the order from the Naval Air Systems Command, said the $31.7 million contract funds the sixth full-rate production contract for the system used on EA-6B and EA-18G aircraft.
It also brings the number units produced to 314 from 230.
The AN/ALQ-99 was developed by Cobham Defense Electronics, part of Britain's Cobham plc, and is designed to protect aircraft, ships, and ground troops by disrupting enemy radar and communications.
"This award continues a long tradition of Cobham support to the Navy's mission success in harm's way," the company said. "Cobham's support to the Navy extends beyond Airborne Electronic Warfare.
"The Low Band Transmitter complements other ALQ-99 work, as well as the Next Generation Jammer, the Next Generation Airborne Electronic Attack study and the fleet's Integrated Topside and Surface Electronic Warfare Improvement Program."
Cobham said the production order also includes the first installment of systems for Foreign Military Sales customers.