Tag Archives: electromagnetic-pulse warfare

How Fast is Fast? Try 60 billion times per second

GLOBALFOUNDRIES manufacturing facility, Dresden, Germany

From the DARPA website

Competition for scarce electromagnetic (EM) spectrum is increasing, driven by a growing military and civilian demand for connected devices. As the spectrum becomes more congested, the Department of Defense (DoD) will need better tools for managing the EM environment and for avoiding interference from competing signals. One recent DARPA-funded advance, an exceptionally high-speed analog-to-digital converter (ADC), represents a major step forward. The ADC could help ensure the uninterrupted operation of spectrum-dependent military capabilities, including communications and radar, in contested EM environments. The advance was enabled by 32 nm silicon-on-insulator (SOI) semiconductor technologies available through DARPA’s ongoing partnership with GlobalFoundries, a manufacturer of highly-advanced semiconductor chips.

The EM spectrum, whose component energy waves include trillionth-of-a-meter-wavelength gamma rays to multi-kilometer-wavelength radio waves, is an inherently physical phenomenon. ADCs convert physical data—that is, analog data—on the spectrum into numbers that a digital computer can analyze and manipulate, an important capability for understanding and adapting to dynamic EM environments.  Today’s ADCs, however, only process data within a limited portion of the spectrum at a given time. As a result, they can temporarily overlook critical information about radar, jamming, communications, and other potentially problematic EM signals. DARPA’s Arrays at Commercial Timescales (ACT) program addressed this challenge by supporting the development of an ADC with a processing speed nearly ten times that of commercially available, state-of-the-art alternatives. By leveraging this increased speed, the resulting ADC can analyze data from across a much wider spectrum range, allowing DoD systems to better operate in congested spectrum bands and to more rapidly react to spectrum-based threats.

How fast is fast? The new ADC samples and digitizes spectrum signals at a rate of over 60 billion times per second (60 GigaSamples/sec). …The new ADC can provide a “one-stop shop” for processing radar, communications and electronic warfare signals.

Desirable as these blazing sampling speeds are, they also pose challenges. The amount of data generated is staggering, reaching nearly a terabyte per second. This high data rate requires on-chip data-management circuitry that allows signals to be processed locally on the ADC, reducing the amount of data that must be communicated to neighboring electronics. This on-board digital signal processing burns quite a bit of power and also demands state-of-the-art transistors. The 32 nm SOI technology offered by Global Foundries, the only certified DoD supplier of this circuit technology, provided ACT with the leading-edge transistors needed to sample and process the RF spectrum without exceeding power or data-transfer limitations.

Upcoming ACT designs will go further. By using GlobalFoundries’ even more advanced 14 nm technology, ACT’s next generation of ADCs aim to reduce power requirements by an additional 50 percent and enable yet smaller and lighter systems that can sample even greater swaths of the spectrum.

Excerpts from New Chips Ease Operations In Electromagnetic Environs, Jan. 11, 2016

Electromagnetic Weapons, kill me please

Boeing Growler, uses electromagnetics as offensive weapons. The Growler, which first saw action in Iraq in 2010 and has been extensively (though discreetly) deployed during the NATO air war against Colonel Qaddafi’s forces in Libya, is a souped-up version of the Super Hornet. It…can be used either to spy on enemy communications or to destroy them; to suppress anti-aircraft fire; to disable the electronics of ground vehicles; and to make life so hazardous for enemy aircraft that they dare not fly (and probably to shoot them down electronically, too, though no one will confirm this)….America has ordered 114 of the planes, and has taken delivery of 53. By land, sea and air Nor are aircraft the only vehicles from which destructive electromagnetic pulses can be launched.

BAE Systems, a British defence firm, is building a ship-mounted electromagnetic gun. The High-Powered Microwave, as it is called, is reported by Aviation Week to be powerful enough to disable all of the motors in a swarm of up to 30 speedboats. Ships fitted with such devices would never be subject to the sort of attack that damaged USS Cole in 2000, when an al-Qaeda boat loaded with explosives rammed it. A gun like this would also be useful for stopping pirate attacks against commercial shipping.

Land vehicles, too, will soon be fitted with electromagnetic cannon. In 2013 America hopes to deploy the Radio-Frequency Vehicle Stopper. This device, developed at the Joint Non-Lethal Weapons Directorate in Quantico, Virginia, is a microwave transmitter the size and shape of a small satellite dish that pivots on top of an armoured car. When aimed at another vehicle, it causes that vehicle’s engine to stall. This gentle way of handling the enemy—stopping his speedboats, stalling his tanks—has surprising advantages. For example, it expands the range of targets that can be attacked. Some favourite tricks of modern warfare, such as building communications centres in hospitals, or protecting sites with civilian “human shields”, cease to be effective if it is simply the electronics of the equipment being attacked that are destroyed. Though disabling an aircraft’s avionics will obviously cause it to crash, in many other cases, no direct harm is done to people at all.

The logical conclusion of all this is a so-called “human-safe” missile, which carries an electromagnetic gun instead of an explosive warhead. Such a missile is being developed at Kirtland Air Force Base in New Mexico, and will soon be tested at the White Sands Missile Range….

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