The U.K. military has carried out a first successful test of a British-made "directed energy weapon" to down dozens of drones ...

An invisible radio wave weapon has taken down ‘drone swarms’ in the biggest trial conducted by the British military to date.

So, instead of using ultrasound, radio waves are used as they travel at 300,000,000 m/s. It works in the same way as sonar but with radio waves in place of ultrasound. A short pulse of radio waves ...