Within Microwave Risk
Who Decides When a Microwave Weapon Fires?
Microwave systems need maps, exclusion zones and fallback choices because the safest shot may not be the most powerful one.
On this page
- Electromagnetic mapping before an engagement
- Protected zones around critical systems
- Choosing missiles, jammers, lasers or microwaves
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Introduction
High-power microwave (HPM) defences are often described as weapons that can disable many drones at once, but in practice the most important question is not whether they can fire. It is who authorises the shot, under what conditions, and after what checks. Because microwave effects can extend beyond a single target and interact with nearby electronics, modern counter-drone concepts increasingly treat HPM systems as one element within a larger air-defence network rather than as independent weapons. Before a microwave pulse is authorised, commanders and automated battle-management systems may need to assess the air picture, the electromagnetic environment, nearby friendly equipment and the availability of alternative interceptors. The safest decision is not always the most powerful one. [Office of Naval Research+2D-Fend Solutions]onr.navy.milOffice of Naval ResearchDirected Energy Weapons: High Power MicrowavesHPM weapons create beams of electromagnetic energy over a broad spe…
Who Decides When a Microwave Weapon Fires?
Microwave weapons are generally expected to operate under the same command-and-control principles that govern other air-defence effectors. Detection sensors identify a threat, tracking systems classify it, and a command layer determines whether engagement criteria have been met. Only then is a firing solution approved. The process matters because HPM systems interact directly with electronics rather than relying on physical impact. Office of Naval Research+2Office of Naval Research [onr.navy.mil]onr.navy.milOffice of Naval ResearchDirected Energy Weapons: High Power MicrowavesHPM weapons create beams of electromagnetic energy over a broad spe…
In counter-drone operations, firing authority may be distributed across several levels:
- Automatic engagement logic can recommend or execute responses against clearly identified threats in tightly controlled defence zones.
- Human operators may retain approval authority when collateral electromagnetic effects are possible.
- Air-defence commanders establish engagement policies that determine which threats qualify for microwave attack and which require alternative responses.
- Joint command networks may coordinate microwave systems with radar, electronic warfare, missile batteries and laser weapons to prevent interference between friendly capabilities. Lieber Institute West Point+2Office of Naval Research [lieber.westpoint.edu]lieber.westpoint.eduelectronic warfare law armed conflict 2Lieber Institute West PointElectronic Warfare and the Law of Armed ConflictOct 28, 2024 — This post highlights and offers analysis of som…
The result is less like a standalone weapon trigger and more like a governed decision process within an integrated defensive architecture.
Electromagnetic Mapping Before an Engagement
A microwave shot is influenced by more than the location of the target. Operators must understand what else occupies the electromagnetic environment.
Before deployment, military planners often perform electromagnetic compatibility and vulnerability assessments. These studies identify friendly communications systems, radar installations, command posts, navigation equipment and other electronic assets that could be affected by powerful radio-frequency energy. NATO research on HPM threats emphasises that modern infrastructure and military equipment can be vulnerable to intense electromagnetic effects, making pre-engagement assessment essential. [NATO Store+2Navy SBIR]sto.nato.intNATO StoreHigh Power Microwaves: Threat to Infrastructure and…Over the past few decades, the potential threat from High Power Microwav…
This creates what is effectively an electromagnetic map. Such mapping can include:
- Friendly radio and data networks.
- Civilian telecommunications infrastructure.
- Airport navigation and surveillance systems.
- Critical command-and-control equipment.
- Electronic systems mounted on friendly aircraft, vehicles and ships.
The map does not merely identify where a threat is located. It helps determine where a microwave pulse should not be directed. In many situations, the preferred firing position is selected because it reduces exposure to friendly systems rather than because it offers the strongest possible effect on the target. [D-Fend Solutions+2NATO Store]d-fendsolutions.comKey challenge when mitigation drones with EMP/HPM: Significant collateral damage to electronics in.Read more…
Why Mapping Changes Engagement Decisions
Microwave weapons are sometimes portrayed as broad-area tools. Modern systems increasingly seek greater control over beam shape and targeting, but they still require awareness of the surrounding environment. Companies developing operational systems emphasise operator control and selectable engagement effects, reflecting the need to manage risk rather than simply maximise power. [Epirus]epirusinc.comEpirusEpirus Leonidas High-Power Microwave: Directed Energy…Leonidas is a solid-state, high-power HPM system, utilizing Gallium Nitrid…
Consequently, a threat that appears eligible for engagement may still be denied if the predicted electromagnetic footprint overlaps sensitive friendly equipment.
Protected Zones Around Critical Systems
One of the most important governance tools is the establishment of protected zones.
Protected zones are areas or categories of equipment that receive special consideration before microwave engagement is authorised. They function as exclusion rules within the defensive network. If a potential shot risks exposing protected assets, the engagement may require higher-level approval or may be prohibited entirely.
Examples can include:
- Air traffic control systems.
- Friendly air-defence radars.
- Strategic communications nodes.
- Medical facilities.
- Critical civilian infrastructure.
- Friendly command-and-control centres.
The logic resembles the no-fire areas used in conventional operations, except that the protected space is defined by electromagnetic risk rather than physical blast radius. [Lieber Institute West Point+2NATO Store]lieber.westpoint.eduelectronic warfare law armed conflict 2Lieber Institute West PointElectronic Warfare and the Law of Armed ConflictOct 28, 2024 — This post highlights and offers analysis of som…
Dynamic Exclusion Zones
These protected areas are not necessarily fixed.
A friendly aircraft entering a sector may temporarily create a no-fire region for microwave engagements. A mobile command vehicle relocating across the battlefield may alter the permitted firing geometry. During coalition operations, participating forces may contribute their own protected systems to the shared air-defence picture. [Lieber Institute West Point]lieber.westpoint.eduelectronic warfare law armed conflict 2Lieber Institute West PointElectronic Warfare and the Law of Armed ConflictOct 28, 2024 — This post highlights and offers analysis of som…
As microwave systems become more integrated with digital battle-management software, exclusion zones can be updated automatically and incorporated into engagement recommendations. The firing question therefore becomes not merely “Can the weapon reach the target?” but “Can it reach the target without violating current protection rules?”
Choosing Missiles, Jammers, Lasers or Microwaves
Perhaps the most important firing rule is that microwave weapons are not always the preferred option.
Modern air-defence concepts increasingly treat defensive tools as a layered menu of effects. A command system may have access to electronic jamming, high-power microwaves, laser weapons, guns and missiles simultaneously. The engagement decision becomes a problem of optimisation rather than simple target destruction. [Sentrycs+2Office of Naval Research]sentrycs.comDirected Energy Weapons (DEW)Directed Energy Weapons use electromagnetic energy to disable drones. Learn how HEL lasers and HPM s…
A typical decision process might ask:
- Can the drone be safely ignored?
- Can it be diverted or jammed?
- Can a laser neutralise it with lower collateral risk?
- Is a microwave pulse justified because multiple drones are present?
- Is a kinetic interceptor required because other options are unsuitable?
The answer depends on the tactical situation.
A single drone approaching near sensitive communications equipment may be engaged with a laser because the microwave option carries greater electromagnetic risk. A dense swarm approaching from open terrain may favour HPM because one pulse can affect multiple targets simultaneously. A fast or hardened target may require a missile regardless of the availability of directed-energy systems. [Robin Radar+3Sentrycs+3The Strategist]sentrycs.comDirected Energy Weapons (DEW)Directed Energy Weapons use electromagnetic energy to disable drones. Learn how HEL lasers and HPM s…
Cost and Risk Are Both Part of the Calculation
Microwave weapons are attractive partly because they can engage multiple drones with a deep magazine and low cost per shot compared with missile interceptors. However, commanders do not normally optimise for cost alone. They balance cost against mission assurance, electromagnetic safety and operational consequences. [Defence Finance Monitor+2The Strategist]defencefinancemonitor.comnon kinetic counter uas with highDefence Finance MonitorNon-Kinetic Counter-UAS with High Power Microwave8 Dec 2025 — High Power Microwave weapons belong to the broader c…
A microwave engagement that saves missiles but risks disrupting critical friendly electronics may be judged less desirable than a more expensive interceptor. Governance frameworks therefore seek to ensure that economic efficiency does not override broader operational safety.
Why Governance Matters as Much as Power
Recent demonstrations have shown that modern HPM systems can disable large numbers of drones in a single engagement, reinforcing their appeal for counter-swarm defence. Yet the same demonstrations highlight why firing decisions require oversight: a weapon designed to affect electronics at scale must operate within carefully defined limits. [Tom's Hardware]tomshardware.comTom's Hardware High-power microwave system downs 49 drones in one shotelectronics warfare company, successfully demonstrated a major advancement in counter-drone technology with its Leonidas high-power micro…
The credibility of microwave air defence therefore depends not only on beam power, range or drone-kill numbers. It depends on the quality of the rules governing use. Electromagnetic mapping, protected-system exclusion zones and structured choices between missiles, jammers, lasers and microwaves are what transform a powerful technology into a practical and controllable component of modern air defence. Office of Naval Research+3Lieber Institute West Point+3NATO Store [lieber.westpoint.edu]lieber.westpoint.eduelectronic warfare law armed conflict 2Lieber Institute West PointElectronic Warfare and the Law of Armed ConflictOct 28, 2024 — This post highlights and offers analysis of som…
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Further Reading
Books and field guides related to Who Decides When a Microwave Weapon Fires?. Use these as the next step if you want deeper reading beyond the article.
Electronic Warfare in the Information Age
First published 1999. Subjects: Electronics in military engineering, Information warfare.
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Endnotes
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Link: https://www.onr.navy.mil/organization/departments/code-35/division-353/directed-energy-weapons-high-power-microwavesSource snippet
Office of Naval ResearchDirected Energy Weapons: High Power MicrowavesHPM weapons create beams of electromagnetic energy over a broad spe...
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Link: https://www.onr.navy.mil/organization/departments/code-35/division-353/directed-energy-weapons-cdew-and-high-energy-lasersSource snippet
Office of Naval ResearchCounter Directed Energy Weapons and High Energy LasersDirected energy weapons (DEWs) are defined as electromagnet...
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Directed Energy Weapons (DEW)Directed Energy Weapons use electromagnetic energy to disable drones. Learn how HEL lasers and HPM s...
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NATO StoreHigh Power Microwaves: Threat to Infrastructure and...Over the past few decades, the potential threat from High Power Microwav...
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Disruption to Destruction Assessing theby K Karcz · Cited by 2 — compact High-Power Microwave (HPM) sources in remotely interacting with...
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Key challenge when mitigation drones with EMP/HPM: Significant collateral damage to electronics in.Read more...
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Link: https://www.epirusinc.com/electronic-warfareSource snippet
EpirusEpirus Leonidas High-Power Microwave: Directed Energy...Leonidas is a solid-state, high-power HPM system, utilizing Gallium Nitrid...
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Title: Tom’s Hardware High-power microwave system downs 49 drones in [one shot]({{ ‘one-shot/’ | relative_url }})
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electronics warfare company, successfully demonstrated a major advancement in counter-drone technology with its Leonidas high-power micro...
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Drone-deployed nets have a long range and low risk of collateral damage...
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Additional References
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Link: https://www.gao.gov/video/directed-energy-weapons-dod-should-focus-transition-planningSource snippet
Directed Energy Weapons DOD Should Focus on Transition...DOD spends about $1 billion annually on directed energy--concentrated electroma...
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Title: directed energy weapons in counter drone missile defense 3576
Link: https://www.coherentmarketinsights.com/blog/aerospace-and-defense/directed-energy-weapons-in-counter-drone-missile-defense-3576Source snippet
Directed Energy Weapons in CounterDrone Missile Defense4 May 2026 — These include energy beams like laser, microwave, or radio frequency...
Published: May 2026
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Title: directed energy weapons high power microwaves
Link: https://www.electronicsforu.com/market-verticals/directed-energy-weapons-high-power-microwavesSource snippet
Directed Energy Weapons: High Power Microwaves4 Oct 2016 — The weapon is designed to disrupt, degrade or destroy electronics of the targe...
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Title: high power microwaves more than just a hot lunch
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High power microwaves – more than just a hot lunch!3 Mar 2025 — Non-lethal effects: HPMs can disable enemy systems without causing direct...
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The Strategic Role of High-Power Microwave Directed Energy...by L Christie · 2026 — The paper compares HPM DEWs with high-energy laser (...
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High power microwave for knocking out programmable...by MZ Chaari · 2021 · Cited by 23 — This article aims to examine the directed energ...
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Epirus LeonidasThe Leonidas is a high-power microwave (HPM) weapon developed to disable unmanned aerial vehicle (UAV) swarms. Epirus w...
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