Mercury Defense Systems, a subsidiary of Mercury Systems in Chelmsford, Mass., will provide the Navy with Digital RF Memory (DRFM) jammers as part of a follow-on contract.
Mercury Defense Systems, formerly KOR Electronics, previously won a $1.5 million U.S. Navy order last June for the Mercury Airborne 1225 advanced DRFM radar jammers. These orders are part of an overall contract worth as much as $56.7 million that KOR Electronics won in March 2010. The award increased in 2013.
The Mercury Airborne 1225 ruggedized air-cooled, airborne 3-bit miniaturized digital RF memory (DRFM) was developed for airborne, pod, and unmanned aerial vehicle (UAV) applications with as much bandwidth as 1200 MHz. It is self-contained with internal techniques and RF and power supplies.
The company has produced more than 130 units for several users. The UAV radar suite controller (RCS) enhancement and deceptive electronic countermeasures (ECM) are its primary applications.
Related: Navy and Air Force choose DRFM jammers from Mercury Systems to help spoof enemy radar
DRFM technology has several features. First, it provides coherent time delay of RF signals in applications like radar and electronic warfare. It also produces coherent deception jamming to a radar system by replaying a captured radar pulse with a small delay, which makes the target appear to move.
DRFM also can modulate captured pulse data in amplitude, frequency, and phase to provide other affects. A Doppler shift correlates range and range rate trackers in the radar. DRFM also can replay captured radar pulses many times to fool the radar into perceiving many targets.
Small packages, fast response, and large volumes of low-latency compute power define modern DRFM evolution, Mercury officials say. The company's latest DRFM technology produces modules as thin as 0.44 inches, and capitalizes on direct digital synthesizer (DDS) local oscillator (LO) technology.
DDS delivers sub-microsecond tuning speeds over a wide bandwidth, while advanced circuit design and simulation helps reduce spurious, inter-module and phase noise.
The Mercury 1225 DRFM has more than 15 dBc worst-case spurious suppression across the entire band with typical spurs of more than 19 dBc. The Airborne 1225 has storage for as many as 48 user-defined deception programs.
Related: BAE Systems to build radar jammers for Navy EA-6B Prowlers
Electronic countermeasures techniques for pipeline, stretched pulse including synthetic continuous wave, and several false target modes are defined through the user interface.
The unit has one RF converter, one converter/memory, and one system controller; three bit phase encoding at 1.2 GHz instantaneous bandwidth; can program each false target for range, Doppler, and bi-phase; can track as many as four emitters; and offers internal techniques against two to four emitters.
Mercury received the most recent DRFM orders in the company's fiscal 2015 third quarter and are part of a firm-fixed-price, indefinite delivery/indefinite quantity () time and material contract award issued in 2010.Mercury officials say they expect to ship the DRFM jammers to the Navy by the end of the company's fiscal 2016 third quarter. For more information contact Mercury Defense Systems online at www.mrcy.com/defense.
