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High-Power Microwave (HPM)

Directed EnergyOpen-Source Verified

Emits a burst of high-power microwave energy that fries drone electronics instantly. Unlike lasers, can affect a wider area — potentially the most effective counter-swarm weapon.

How It Works

A high-power microwave generator creates an intense electromagnetic pulse directed at the target area. The microwave energy induces currents in drone electronics that exceed component tolerances, causing immediate failure. Can disable multiple drones simultaneously.

Technical Specifications

range
500m-5 km
cost
$5-50 million (system)
deployment Time
Vehicle-mounted: minutes
crew Required
2-4 operators
weight
1,000-10,000 kg
power Requirement
High-power generator

Advantages

  • + Area effect — can engage swarms
  • + Near-instant engagement
  • + Low cost per engagement
  • + Effective against all electronics-based drones
  • + No ammunition — unlimited shots
  • + Works in all weather conditions

Disadvantages

  • − Extremely expensive system cost
  • − Can damage friendly electronics nearby
  • − Very heavy — requires vehicle/fixed installation
  • − Still largely experimental technology
  • − Shielded drones may resist

Tactical Deployment Tips

  • ▸ Deploy for high-value asset protection
  • ▸ Best counter-swarm weapon available
  • ▸ Ensure friendly electronics are shielded or distant
  • ▸ Combine with radar for target detection

Limitations & Vulnerabilities

  • ⚠ Maturing but transitioning to production — US Army awarded a Gen II HPM contract Sep 2025 with expected >2× range vs. earlier prototypes
  • ⚠ Friendly electronic fratricide risk
  • ⚠ Very large power requirements
  • ⚠ Hardened military electronics may resist

Drones It Defeats

Drone types ranked by how well this system defeats them — tap any drone for details

Commercial COTS QuadcopterHighMilitary Reconnaissance QuadcopterHighHeavy-Lift FPV BomberHighTactical Fixed-Wing UAVHighCoordinated Drone SwarmHighAI-Autonomous Strike DroneHighMini ISR Fixed-WingHighVTOL Fixed-Wing HybridHighMicro / Nano DroneHighCBRN / Hazmat DroneHighAcoustic-Stealth RotaryHighConverted Agricultural Heavy-LiftHighAdversary Interceptor DroneHighKinetic Impact / Ramming DroneHighOne-Way Attack Cruise DroneHighFPV Kamikaze DroneMediumFiber-Optic Guided FPVMediumSmall Loitering MunitionMediumLarge Loitering MunitionMediumHeavy-Lift Cargo / Resupply UAVMediumTethered Surveillance DroneMediumDecoy / Electronic Warfare DroneMediumMothership / Carrier UAVMediumSea-Skimming Attack USVMediumMALE / HALE Strategic UAVLowNaval USV / UUVLowJet-Powered UCAVLowHigh-Altitude Pseudo-Satellite (HAPS)NoneWinged Glide MunitionNone

⚠ How Adversaries Defeat This System

Active enemy adaptations observed in the field — distinct from passive limitations above

  • ▸ Faraday-shielded electronics survive HPM exposure
  • ▸ Hardened mil-spec autopilots designed against EMP/HPM stay functional
  • ▸ Beyond effective range (typically <1 km), HPM energy density drops below kill threshold
  • ▸ Friendly electronics in the cone are also at risk — limits employment near own units

Sources & Further Reading

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