Drones have become a common sight in today’s conflicts. They deliver reconnaissance data, drop munitions on positions, or disrupt operations from afar. Militaries now prioritise ways to neutralise these threats before they inflict damage.
Counter-unmanned aerial systems, often abbreviated as C-UAS, form the core of this defence strategy. Three primary methods stand out for their practicality and effectiveness: directed energy weapons that employ lasers or microwaves to disable drones through heat or electromagnetic interference, electronic warfare techniques that jam or deceive drone signals, and shotguns that use kinetic force with specialised ammunition to bring them down. Each option carries distinct advantages suited to specific scenarios, yet none dominates universally.
The choice depends on factors like range requirements, environmental conditions, and the nature of the drone threat. Real-world deployments reveal how these approaches perform under pressure, offering insights for forces adapting to this evolving challenge.
Directed energy weapons
Directed energy weapons channel focused beams of energy to target drones with precision. High-energy lasers generate intense heat that melts components or ignites materials, while high-power microwaves emit pulses that overload electronics, causing immediate failure. These systems appeal to operators because they engage targets at the speed of light and incur minimal costs per shot after initial investment. Lasers, for instance, have undergone extensive testing in naval and land-based settings.
The United States Navy installed its Laser Weapon System on the USS Ponce in 2014, where it successfully engaged small unmanned aerial vehicles by concentrating energy to cause structural damage. By 2020, the United States Army demonstrated the Directed Energy Maneuver Short-Range Air Defense system, equipped with a 50-kilowatt laser, neutralising multiple drones and incoming rockets in rapid succession during field trials. Jeremy Murray-Krezan from the Air Force Research Laboratory commented in 2025 on the maturity of these technologies, noting that ongoing evaluations confirm their readiness for broader integration into defence networks.
High-power microwaves complement lasers by affecting areas rather than single points, making them suitable for handling drone swarms. The United States Air Force’s THOR system, evaluated in 2023 at Kirtland Air Force Base, directed microwave bursts to disable clusters of unmanned vehicles by inducing electrical surges. Its containerised design allows for quick relocation, fitting the needs of mobile units.
Epirus developed the Leonidas system, which secured a $66 million contract from the United States Army in 2024 for swarm defence applications. During demonstrations, Leonidas disrupted dozens of drones simultaneously with targeted pulses. Jeremy Lowery from Epirus explained in 2024 that microwaves prove effective against drones operating autonomously, as they directly impact hardware circuits rather than relying on signal disruption alone. A DARPA initiative in 2022 featured a drone equipped with a microwave emitter that neutralised other unmanned systems in mid-flight, highlighting the potential for portable variants in dynamic operations.
Electronic Warfare
Electronic warfare counters drones by interfering with their control and navigation without physical contact. Jammers overwhelm radio frequencies to sever links between drones and operators, while spoofers transmit false signals to mislead guidance systems. This method preserves the drone for analysis or avoids creating hazardous debris in populated zones. In Ukraine, both conflicting parties have applied electronic warfare extensively against unmanned threats.
Russian Leer-3 systems in 2023 jammed Ukrainian drone formations, leading to uncontrolled crashes by blocking command channels. Ukrainian Bukovel-AD jammers, with ranges up to 50 kilometres, neutralised Russian reconnaissance drones in the Donbas region by saturating GPS frequencies. In Yemen during 2020, Houthi forces used jamming to force down Saudi coalition drones, enabling capture for reverse engineering. Israel’s Iron Dome incorporates electronic warfare elements that spoof approaching drones, redirecting them away from intended targets.
Shotguns
Shotguns deliver kinetic impacts through spreads of pellets, ideal for engaging small, manoeuvrable drones at close quarters. Using birdshot or custom anti-drone rounds increases hit probability against fast-moving targets. Ukrainian troops have downed first-person-view drones with 12-gauge firearms during assaults, as captured in 2024 footage showing soldiers striking Russian unmanned vehicles at distances under 50 metres.
The United States Marine Corps evaluated shotguns in 2023 at Quantico, determining their utility against quadcopters in urban environments where other systems might prove cumbersome. In Sudan’s Khartoum clashes in 2023, Rapid Support Forces employed shotguns to bring down government drones scouting positions. Ammunition maker Norma introduced a 12-gauge load in 2024 optimised for unmanned threats, combining pellet sizes to improve penetration on plastic frames while maintaining wide coverage.
Which C-UAS solution is more effective
Directed energy weapons excel in scenarios requiring engagement from standoff distances. Lasers provide silent, invisible strikes that avoid alerting operators until too late. The USS Portland’s 2020 trial at sea downed a drone with a beam that caused immediate combustion, illustrating naval applications where space for ammunition storage is limited. Microwaves cover broader fields, as seen in a 2023 United States Army exercise at Yuma Proving Ground, where a single emitter neutralised 33 drones in coordinated groups. However, line-of-sight requirements restrict their use in obstructed terrain, and atmospheric conditions like fog diffuse laser beams, while rain absorbs microwave energy. Initial acquisition costs run high, often in the millions for systems like THOR, which may deter smaller defence budgets. Power demands also pose issues, as generators or batteries must supply consistent energy for sustained operations.
Electronic warfare provides a non-destructive alternative, useful for intelligence gathering post-incident. Portable jammers such as the DroneGun Tactical, deployed by Australian security teams in 2024, compel drones to land intact by overwhelming control frequencies. In Libya’s 2020 skirmishes, Russian Krasukha systems jammed Turkish Bayraktar drones, disrupting their missions and allowing ground forces to advance unopposed. The approach’s low cost per use, relying on electricity rather than munitions, makes it scalable. Yet, it risks interfering with friendly communications if frequencies overlap. Autonomous drones, programmed to follow preset paths without ongoing signals, resist jamming. Spoofing demands detailed knowledge of drone protocols, which evolve as manufacturers update software.
Shotguns offer immediate response without complex electronics, fitting infantry needs in fluid engagements. Colombian police in 2023 raids downed cartel surveillance drones with standard 12-gauge loads, preventing overhead monitoring during operations. The weapon’s familiarity reduces training time, and ammunition availability ensures readiness in remote areas. Range limitations confine effectiveness to 100 metres or less, requiring threats to approach closely. Aiming at targets moving at 100 kilometres per hour tests marksmanship, though wind can scatter pellets unpredictably. Specialised rounds mitigate this by optimising spread and velocity for small, fragile frames.
No single method outperforms others universally. Directed energy suits static defences against swarms, as Ukraine’s layered systems in 2024 downed 90 percent of incoming drones by combining lasers with other tools. Electronic warfare fits mobile patrols, where jammers mount on vehicles for on-the-go protection. Shotguns serve as last-resort defences for troops without access to advanced gear. Forces, contending with drone-armed insurgents in vast terrains, often combine them. In Nigeria’s North-East, Boko Haram’s 2024 drone strikes prompted adoption of mixed countermeasures, including jammers and directed energy prototypes from partners like Elbit.
Technical hurdles persist across methods. Directed energy systems require substantial power sources, limiting mobility for field units. Cooling mechanisms prevent overheating during prolonged use, adding weight and complexity. Electronic warfare faces spectrum crowding, where multiple signals compete for bandwidth, reducing effectiveness in dense electronic environments. Adaptive drones switch frequencies to evade jammers, necessitating constant updates to countermeasure software. Shotguns demand line-of-sight and steady hands, ineffective against high-altitude or fast drones beyond visual range.
Integration poses another layer of difficulty. Combining methods into unified systems requires compatible hardware and software, often from different vendors. In tests, mismatched interfaces delay responses, allowing drones to slip through. Training personnel to operate these tools takes time, as soldiers must learn not just mechanics but also limitations to avoid over-reliance.
Costs vary widely. Directed energy setups like high-energy lasers run into hundreds of millions for development and deployment, though per-shot expenses drop to dollars. Electronic warfare kits, such as handheld jammers, cost tens of thousands, with low ongoing fees for electricity. Shotguns and ammunition remain the cheapest, at hundreds per unit, accessible even for budget-constrained forces.
Environmental factors influence choice. In deserts, dust scatters laser beams, while microwaves perform better in open spaces. Dense forests favour shotguns for close encounters, as foliage blocks electronic signals. Urban areas benefit from electronic warfare to avoid collateral from kinetic hits.
Real-life deployments underscore these points. In Iraq, US forces used lasers in 2021 to counter Islamic State drones harassing bases, downing them at range without alerting nearby civilians. Ukrainian troops in 2023 jammed Russian FPV drones during advances, forcing operators to abandon attacks. In Somalia, al-Shabaab drones met shotgun fire from African Union peacekeepers in 2024 ambushes, halting reconnaissance efforts.
For militaries evaluating C-UAS, a blended approach often yields best results. Start with detection radars to spot drones early, then apply electronic warfare to disrupt, followed by directed energy or kinetic takedowns if needed. This layered defence, tested in US exercises in 2025, countered 95 percent of simulated swarms by sequencing methods.
Forces facing budget limits and vast areas, can adapt these lessons. In the Sahel, where jihadists use drones for ambushes, portable jammers carried by patrols provide immediate shields. Directed energy might suit fixed bases guarding key infrastructure, while shotguns equip infantry for patrols. Partnerships with nations like Israel or the US supply training and equipment, as seen in Nigeria’s 2024 acquisitions.
Drones continue to advance with AI for autonomous navigation, resisting simple jams. Countermeasures must evolve accordingly, incorporating machine learning to predict drone paths or adapt frequencies dynamically. In 2025 trials, AI-enhanced jammers neutralised 80 percent of autonomous drones by anticipating evasion tactics.
Power sources remain a bottleneck for directed energy in remote operations. Solar panels or compact generators offer solutions, tested in Australian outback exercises in 2024. For electronic warfare, broadband jammers cover multiple bands, countering frequency-hopping drones.
Shotgun advancements include smart sights that calculate lead for moving targets, improving hit rates. In US Marine trials in 2025, these boosted accuracy by 40 percent against FPV drones at 50 metres. Directed energy and electronic warfare allow non-lethal options, like forcinga landings, preserving lives on both sides. Shotguns, being kinetic, risk debris causing unintended harm.
Maintenance demands professional attention. Directed energy systems require clean optics and calibrated emitters, tasks for specialised technicians. Electronic warfare gear needs regular software updates to stay ahead of drone evolutions. Shotguns demand basic cleaning but specialised ammo supply chains.
In urban warfare, where civilians mix with combatants, precision matters. Lasers offer pinpoint accuracy, minimising collateral. Electronic warfare avoids physical impacts altogether. Shotguns, used at close range, require clear lines of fire to prevent stray pellets.
Naval applications adapt these methods for maritime threats. US Navy ships in 2025 deployed lasers against Houthi drones in the Red Sea, downing them at sea without ammunition expenditure. Electronic warfare on vessels jams incoming swarms, while shotguns serve as deck defences for low-flying intruders.
For navies patrolling coasts against piracy, similar adaptations apply. In the Gulf of Guinea, Nigerian vessels in 2024 used jammers to disrupt pirate drones scouting ships. Directed energy could mount on larger frigates, while shotguns arm boarding teams.
Budgeting plays a key role in selection. Directed energy suits nations with defence industries, like the US or Israel, where R&D amortises costs. Electronic warfare offers mid-range pricing, with systems from companies like Raytheon at $100,000 per unit. Shotguns cost least, around $500 for a basic model, plus ammo at $5 per round.
Scalability favours electronic warfare for large areas, as signals propagate widely. Directed energy scales with power input, handling more threats with stronger beams. Shotguns limit to individual engagements.
Future trends lean toward hybrids. Systems combining laser with jamming, tested in 2025 by Lockheed Martin, provide fallback options if one fails. AI integration predicts drone approaches, activating the appropriate countermeasure automatically.
Militaries often with mixed fleets, can start with affordable shotguns and jammers before investing in directed energy. Training focuses on quick deployment, as seen in Ethiopian exercises in 2024 against simulated insurgent drones.
In summary, directed energy provides long-range precision, electronic warfare offers non-kinetic flexibility, and shotguns deliver immediate kinetic response. The optimal C-UAS mixes them based on mission needs, ensuring forces stay ahead of drone threats in evolving battlespaces.
