Within Collateral Risk
Why cities are the hardest microwave defense setting
Civilian sites concentrate telecoms, transport systems, medical electronics, and industrial controls in ways that make microwave collateral effects difficult
On this page
- Which civilian systems could be exposed
- Why interconnected infrastructure increases uncertainty
- Where controlled military use differs from public deployment
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Introduction
Civilian infrastructure creates the most difficult collateral-risk problem for high-power microwave (HPM) counter-drone systems because modern cities concentrate thousands of interconnected electronic systems in a relatively small area. A microwave defence may be aimed at hostile drones, but the same electromagnetic energy can potentially couple into nearby communications equipment, sensors, control systems, medical devices, vehicles, and networked infrastructure. The challenge is not simply whether a nearby device will be affected. It is that operators often cannot predict with certainty how a dense web of interconnected electronics will respond in a real-world urban environment. HPM systems are designed to disrupt electronics, and the very systems that make cities function are increasingly electronic and interconnected. [DroneShield+2Inzpire]droneshield.comA Counter to Drone Swarms: High-Power Microwave…HPM weapons work by emitting directed bursts of electromagnetic energy, dis…
This is why the civilian setting is fundamentally different from a remote military range. The question is no longer just whether a drone can be defeated. It becomes whether that engagement can occur without creating unacceptable uncertainty for public communications, transport, healthcare, and critical infrastructure systems operating nearby. [D-Fend Solutions+2robinradar.com]d-fendsolutions.comD-Fend Solutionscounter-drone mitigation technologies…EMP and HPM work indiscriminately and can cause heavy collateral damage, potenti…
Which Civilian Systems Could Be Exposed?
Cities contain a far greater concentration of vulnerable electronic pathways than most military operating areas. Antennas, cables, sensor networks, wireless links, and digital control equipment are embedded throughout urban infrastructure.
Potentially exposed systems include:
- Mobile telephone base stations and wireless communications networks.
- Railway signalling and transport-management electronics.
- Airport surveillance, navigation, and communications equipment.
- Traffic-control systems and smart-city sensor networks.
- Industrial control systems managing power, water, and utilities.
- Security cameras, data networks, and public-safety communications.
- Medical electronics in hospitals and emergency-response facilities. [robinradar.com+2Inzpire]robinradar.comHigh Power Microwave (HPM) devices. High Power Microwave (HPM) devices generate an Electromagnetic Pulse (EMP) capable of disrupting elec…
The issue is not that every nearby device will necessarily fail. Electromagnetic effects occur across a spectrum ranging from negligible impact to temporary disruption, corrupted data, resets, degraded performance, or permanent damage. The outcome depends on factors such as shielding quality, wiring configuration, frequency, pulse characteristics, orientation, and distance from the source. Those variables are difficult to predict across a city filled with equipment from hundreds of manufacturers and decades of technological generations. [waru.edu+2s3vi.ndc.nasa.gov]waru.eduDepartment of Defense Interface Standard MIL- STD-464D…The system shall comply with current DoD criteria for the protection of personn…
Healthcare environments illustrate the challenge particularly well. Modern hospitals rely on dense concentrations of networked equipment, wireless communications, imaging systems, monitoring devices, and digital infrastructure. Even if individual devices are protected to varying degrees, operators must consider the possibility that supporting systems, network links, or ancillary electronics could react differently than expected. The consequence of disruption in such settings is measured not merely in equipment replacement costs but in operational continuity and public safety.
Why Interconnected Infrastructure Increases Uncertainty
The hardest problem is not the presence of a single vulnerable device. It is the interconnected nature of modern infrastructure.
Many urban systems are linked through communications networks, fibre-connected control centres, wireless backhaul links, distributed sensors, and automated decision systems. A disturbance affecting one component may propagate operational consequences through an entire network even if most equipment remains physically unharmed.
For example, transport systems increasingly depend on continuous communication between sensors, controllers, signalling equipment, and central management systems. Utility networks similarly rely on distributed monitoring and control architectures. In these environments, uncertainty about secondary effects can become more important than direct physical damage.
Military electromagnetic-effects standards exist largely because complex systems frequently behave in unexpected ways when exposed to challenging electromagnetic environments. Modern military platforms undergo extensive electromagnetic compatibility testing specifically to ensure that numerous electronic subsystems can coexist safely and continue functioning when exposed to external electromagnetic influences. Tonex Training+3s3vi.ndc.nasa.gov+3waru.edu [s3vi.ndc.nasa.gov]s3vi.ndc.nasa.govMI L-STD-464CMIL-STD-464C - S3VI1 Oct 2010 — STANDARD ELECTROMAGNETIC ENVIRONMENTAL. This standard is approved for use by all Departments and Agencies…
Civilian infrastructure generally lacks a comparable level of integrated, platform-wide electromagnetic hardening. Instead, cities contain a patchwork of commercial products, legacy equipment, third-party networks, and infrastructure built under different standards and assumptions. That diversity increases uncertainty because operators cannot easily know the susceptibility of every nearby system before an engagement occurs. [Tonex Training+2Betalight-tactical]tonex.comTonex TrainingOverview of MIL-STD-464 | Electromagnetic Environmental…MIL STD 464 requires that the system be electromagnetically comp…
A further complication is the growing dependence on commercial off-the-shelf electronics. These systems often provide cost and capability advantages but may not have been designed with exposure to intense electromagnetic environments as a primary requirement. Military standards explicitly recognise that mixed equipment environments increase electromagnetic compatibility challenges. [Tonex Training]tonex.comTonex TrainingOverview of MIL-STD-464 | Electromagnetic Environmental…MIL STD 464 requires that the system be electromagnetically comp…
The Urban Counter-Drone Dilemma
The irony of counter-drone operations is that the locations most likely to need protection are often the locations where microwave use becomes most complicated.
Major cities, transport hubs, public events, government districts, airports, industrial facilities, and critical infrastructure sites are attractive drone targets precisely because they contain valuable assets and large populations. Yet those same locations also contain the densest concentration of electronics.
This creates a difficult operational trade-off. A system designed to engage multiple drones simultaneously derives much of its value from affecting a broad target area. High-power microwave systems are often promoted for their ability to defeat swarms rather than single aircraft. However, broader electronic effects can increase concern about nearby infrastructure and non-target systems. [RTX+2The Strategist]rtx.comPhaser High-Power Microwave System | RaytheonOne of the most effective counter-unmanned aerial system defenses is a high-power microwa…
As a result, the question facing planners is often less about whether the technology can disable drones and more about whether it can do so while maintaining confidence that surrounding civilian systems remain unaffected. The closer a defended location is to critical public infrastructure, the more demanding that assurance requirement becomes.
Where Controlled Military Use Differs from Public Deployment
Military use generally occurs under conditions that are easier to manage. Defence forces can establish exclusion zones, control access to operating areas, harden friendly systems, conduct electromagnetic compatibility testing, and coordinate among participating units before deployment. They also possess detailed knowledge of many of the systems operating within the engagement environment. [s3vi.ndc.nasa.gov+2waru.edu]s3vi.ndc.nasa.govMI L-STD-464CMIL-STD-464C - S3VI1 Oct 2010 — STANDARD ELECTROMAGNETIC ENVIRONMENTAL. This standard is approved for use by all Departments and Agencies…
Public deployment presents a very different challenge. Urban operators may have limited visibility into nearby commercial networks, privately owned communications equipment, industrial systems, or consumer electronics. They must consider not only technical performance but also regulatory obligations, public safety, liability concerns, and the continuity of essential services.
This distinction explains why collateral-electronics risk is often viewed as a central deployment question rather than merely a technical detail. A military force may accept a level of electromagnetic uncertainty that would be unacceptable around hospitals, transport hubs, utility infrastructure, or densely populated urban districts.
For that reason, discussions about microwave counter-drone systems increasingly focus on control, precision, electromagnetic compatibility, and risk management rather than simply on raw effectiveness. The technology’s ability to defeat drones is only one part of the equation. In civilian environments, confidence that surrounding infrastructure will continue operating safely may be the more difficult requirement to satisfy. [D-Fend Solutions+2unmannedairspace.info]d-fendsolutions.comD-Fend Solutionscounter-drone mitigation technologies…EMP and HPM work indiscriminately and can cause heavy collateral damage, potenti…
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Endnotes
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Source: droneshield.com
Link: https://www.droneshield.com/blog/a-counter-to-drone-swarms-high-power-microwave-weaponsSource snippet
A Counter to Drone Swarms: High-Power Microwave...HPM weapons work by emitting directed bursts of electromagnetic energy, dis...
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Source: inzpire.com
Title: high power [microwaves]({{ ‘microwaves/’ | relative_url }}) more than just a hot lunch
Link: https://www.inzpire.com/news/high-power-microwaves-more-than-just-a-hot-lunchSource snippet
High power microwaves – more than just a hot lunch!3 Mar 2025 — High-power microwaves are an emerging class of directed energy weapons th...
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Source: robinradar.com
Link: https://www.robinradar.com/resources/10-counter-drone-technologies-to-detect-and-stop-drones-todaySource snippet
High Power Microwave (HPM) devices. High Power Microwave (HPM) devices generate an Electromagnetic Pulse (EMP) capable of disrupting elec...
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Source: tonex.com
Link: https://www.tonex.com/training-courses/overview-of-mil-std-464-electromagnetic-environmental-effects-requirements-for-systems/Source snippet
Tonex TrainingOverview of MIL-STD-464 | Electromagnetic Environmental...MIL STD 464 requires that the system be electromagnetically comp...
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Source: waru.edu
Link: https://www.waru.edu/sites/default/files/Migrated/CopDocuments/MIL-STD-464.pdfSource snippet
Department of Defense Interface Standard MIL- STD-464D...The system shall comply with current DoD criteria for the protection of personn...
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Source: s3vi.ndc.nasa.gov
Title: MI L-STD-464C
Link: https://s3vi.ndc.nasa.gov/ssri-kb/static/resources/MIL-STD-464C.pdfSource snippet
MIL-STD-464C - S3VI1 Oct 2010 — STANDARD ELECTROMAGNETIC ENVIRONMENTAL. This standard is approved for use by all Departments and Agencies...
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Source: betalight-tactical.com
Link: https://betalight-tactical.com/knowledge-base/regulations/mil-std-464Source snippet
MIL-STD-464 – Electromagnetic Compatibility for Military...MIL-STD-464 is a US military standard that defines electromagnetic environmen...
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Source: rtx.com
Link: https://www.rtx.com/raytheon/what-we-do/integrated-air-and-missile-defense/phaser-high-power-microwaveSource snippet
Phaser High-Power Microwave System | RaytheonOne of the most effective counter-unmanned aerial system defenses is a high-power microwa...
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Source: unmannedairspace.info
Title: building out an effective counter drone system
Link: https://www.unmannedairspace.info/counter-uas-systems-and-policies/building-out-an-effective-counter-drone-system/Source snippet
Building out an effective counter-drone system9 Dec 2025 — Additional layered capabilities could include smart jamming as a mitigation ba...
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Source: d-fendsolutions.com
Link: https://d-fendsolutions.com/cuas-mitigation/Source snippet
D-Fend Solutionscounter-drone mitigation technologies...EMP and HPM work indiscriminately and can cause heavy collateral damage, potenti...
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Source: aspistrategist.org.au
Title: a counter to drone swarms high power microwave weapons
Link: https://www.aspistrategist.org.au/a-counter-to-drone-swarms-high-power-microwave-weapons/Source snippet
A counter to drone swarms: high-power microwave weapons12 May 2025 — HPM weapons work by emitting directed bursts of electromagnetic ener...
Published: May 2025
Additional References
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Source: linkedin.com
Link: https://www.linkedin.com/top-content/technology/drone-defense-solutions/counter-drone-microwave-interception-strategies/Source snippet
Counter-Drone Microwave Interception StrategiesCounter-drone microwave interception strategies use bursts of powerful electromagnetic ene...
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Source: crystalrugged.com
Link: https://www.crystalrugged.com/mil-std-464-electromagnetic-environmental-effects/Source snippet
MIL-STD-464: Electromagnetic environmental effectsSpecifies minimal acceptable standards for the electromagnetic compatibility of ordnanc...
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Source: linkedin.com
Link: https://www.linkedin.com/pulse/ew-hpm-milstd461-milstd464-robi-sen-cltgcSource snippet
EW, HPM, MIL‑STD‑461, and MIL‑STD‑464MIL-STD-464 addresses platform‐level electromagnetic compatibility and electromagnetic environmental...
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Source: absolute-emc.com
Link: https://absolute-emc.com/standard/military-avionics/mil-std-464Source snippet
MIL-STD-464The standard governs how equipment and platforms must be designed, tested, and validated to mitigate the risks posed by electr...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/358274981_C277_Recent_Trends_in_High_Power_Microwave_Counter_Measure_Against_Drone_Swarm_AttackSource snippet
(PDF) C277: Recent Trends in High Power Microwave...HPM can cause soft kill or hard kill depending on the output power, and generally th...
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Link: https://publications.sto.nato.int/publications/STO%20Meeting%20Proceedings/STO-MP-SET-315/MP-SET-315-24.pdfSource snippet
with aerial vehicles to induce disruption, lock-up, or even burnout of their digital systems...
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Source: facebook.com
Title: demonstrating a powerful new approach to counter-drone
Link: https://www.facebook.com/engineeringpost1/posts/military-researchers-in-the-united-states-are-developing-high-power-microwave-we/1554576976668583/Source snippet
drone weapons, such as [lasers]({{ 'lasers/' | relative_url }}) and high- power microwave systems, can create dangerous or otherwise serious collateral effects. While that...
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Source: fortunebusinessinsights.com
Title: high power microwave counter drone market 117042
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High Power Microwave Counter Drone Market Size, Share...9 Jun 2026 — The global high power microwave counter-drone market size is projec...
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Source: epirusinc.com
Link: https://www.epirusinc.com/electronic-warfareSource snippet
N) semiconductors for unmatched counter-electronics effects.Read more...
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Link: https://www.facebook.com/scmp/posts/china-has-lowered-the-operational-cost-of-an-anti-drone-high-power-microwave-sys/1322971063212276/Source snippet
stems. This kind of energy can affect drones, missiles...Read more...
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