As drone swarm tactics mature in modern conflicts, traditional air-defense systems face a brutal cost problem: firing million-dollar missiles at hundred-dollar drones is an exchange rate no military can sustain. High-power microwave weapons are now changing that equation.
Firing million-dollar missiles at hundred-dollar drones is an exchange rate no military can sustain.
The UK Ministry of Defence recently announced that its Radio Frequency Directed Energy Weapon (RF DEW) successfully tracked and downed drone swarms at a test range in West Wales. In a single engagement, the system tackled two waves of swarm attacks, and across the development program it has disabled more than 100 drones. British officials described the intercepts as occurring “almost instantly,” with each shot costing roughly 10 pence.
Unlike laser weapons, which pick off targets one at a time, high-power microwave systems fire an electromagnetic pulse that blankets an area of airspace, frying the internal electronics of multiple drones simultaneously. That gives it a natural advantage against saturation attacks the very tactic swarms are built for.
Cost-effectiveness is the core driver behind rapid adoption. The economics of missile interception simply no longer add up, while a microwave weapon can keep firing as long as it has power, with a per-shot cost roughly equal to the electricity consumed. Experts at China’s Norinco have similarly noted that microwave weapons offer strong counter-saturation capability and high cost-effectiveness, and should complement not replace missiles and guns.
Challenges remain, however. Effective range for microwave weapons is generally around 2 to 3 kilometers, and fully shielding a drone’s electronics is not yet realistic, since drones still need navigation and communication links. Microwave beams are also hard to confine in open airspace and could interfere with civilian communications.
From the UK to China, from BAE Systems to the US Marine Corps’ newly acquired HAVOC system, high-power microwave weapons are accelerating from technology demonstrators to battlefield deployment. With drone swarms increasingly becoming a standard threat, this “defense as long as you have power” capability is redefining the economics of air defense.
