Editing Extremely high frequency (section)

=== Weapons systems ===
[[File:Minsk port bow AK-630 CIWS gun fire control radar.JPG|thumb|Millimeter wave fire control radar for CIWS gun on [[Soviet aircraft carrier Minsk|Soviet aircraft carrier ''Minsk'']], [[Russia]]]]
Millimeter wave [[radar]] is used in short-range [[fire-control radar]] in tanks and aircraft, and automated guns ([[close-in weapon system|CIWS]]) on naval ships to shoot down incoming missiles. The small wavelength of millimeter waves allows them to track the stream of outgoing bullets as well as the target, allowing the computer fire control system to change the aim to bring them together. {{citation needed|date=March 2019}}

With [[Raytheon Technologies|Raytheon]] the [[U.S. Air Force]] has developed a nonlethal antipersonnel weapon system called [[Active Denial System]] (ADS) which emits a beam of millimeter radio waves with a wavelength of 3&nbsp;mm (frequency of 95&nbsp;GHz).<ref>{{cite magazine |url=https://www.wired.com/2007/01/72134/ |title=Slideshow: Say Hello to the Goodbye Weapon |access-date=16 August 2016 | magazine=Wired |date=5 December 2006}}</ref> The weapon causes a person in the beam to feel an intense burning pain, as if their skin is going to catch fire. The military version had an output power of 100 [[Watt#Kilowatt|kilowatts]] (kW),<ref>{{cite web|url= https://terasense.com/news/active-denial-system-a-terahertz-based-military-deterrent-for-safe-crowd-control/|title= Active Denial System: a terahertz based military deterrent for safe crowd control|publisher= Terasense Group Inc|date= 2019-05-29|access-date= 2020-05-03}}</ref> and a smaller law enforcement version, called [[Active Denial System#Silent Guardian|Silent Guardian]] that was developed by Raytheon later, had an output power of 30&nbsp;kW.<ref>{{cite web|url= https://www.wired.com/2009/08/pain-ray-first-commercial-sale-looms/|title= 'Pain ray' first commercial sale looms|first= David|last= Hambling|date= 2009-05-08|publisher= Wired|access-date= 2020-05-03}}</ref>