Within Weather Limits
When Bad Air Favors Microwave Defence
Smoke and dust often punish optical beams more than microwave energy, but microwave use still brings range, interference, and safety tradeoffs.
On this page
- Why longer wavelengths handle particles differently
- Counter drone use in smoke and dust
- Electromagnetic safety and interference risks
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Introduction
In dusty battlefields, wildfire smoke, urban rubble clouds, or deliberately generated obscurants, the question is not simply which directed-energy weapon is more powerful. It is which one can still reach the target. Under these degraded atmospheric conditions, high-power microwave systems often become the safer operational layer because their much longer wavelengths are less affected by the particles that can severely weaken laser beams. That does not make microwaves immune to atmospheric losses, nor does it eliminate concerns about range, electromagnetic interference, or human exposure. However, when visibility deteriorates and airborne particles fill the engagement space, planners frequently view microwave systems as a more reliable complement to laser defences. [DRDO Publications+2Defence Science Review]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
Why Longer Wavelengths Handle Particles Differently
The practical advantage of microwave systems in smoke and dust begins with physics. Military laser weapons generally operate at wavelengths measured in micrometres, while microwave systems operate at wavelengths that are thousands to millions of times longer. Smoke particles, dust grains, soot and aerosol droplets are often large enough relative to laser wavelengths to scatter, absorb or distort optical energy. [ResearchGate+2Defence Science Review]researchgate.netWavelengths of common military lasers.The wavelength of common military lasers (Table 1) is largely in the range of 0.249~12…
For a laser, every scattering event reduces the amount of energy concentrated on the target. Smoke screens, airborne dust from vehicle movement, battlefield debris and pollution can all lower the energy delivered to the aim point. Research on laser propagation consistently identifies aerosols, smoke and dust as important causes of attenuation and beam degradation. [Defence Science Review+2Science Publishing Group]defencesciencereview.com.plpdf 216776 135052Defence Science ReviewDEFENCE SCIENCE REVIEWby A Karkadakattil · 2026 · Cited by 1 — S Aerosol and Dust Scattering: Smoke, dust, and poll…
Microwaves interact with the atmosphere differently. Because of their longer wavelengths, many of the particles that strongly affect optical beams are comparatively small from the microwave’s perspective. As a result, microwave energy generally experiences less scattering from smoke and dust concentrations that can substantially degrade laser performance. Defence analyses comparing high-power microwave (HPM) and high-energy laser systems repeatedly identify this relative tolerance to obscurants as one of the key operational distinctions between the two technologies. [DRDO Publications]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
The distinction matters most when atmospheric conditions are variable rather than completely opaque. A laser may remain effective in light haze but lose range or require longer dwell times as particle density increases. Microwave systems often retain a larger fraction of their effectiveness across those same conditions, making them attractive as a backup or parallel engagement layer. [DRDO Publications+2Defence Science Review]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
Counter-Drone Use in Smoke and Dust
Counter-drone defence provides one of the clearest examples of why degraded air can shift attention towards microwave weapons.
Laser systems defeat drones by concentrating energy on a specific physical point, usually to heat, burn or structurally damage a vulnerable component. That process depends on maintaining a high-quality beam path from weapon to target. Dust kicked up by vehicles, smoke from explosions, or urban fire conditions can make this more difficult by reducing the energy density arriving at the target. [Defence Science Review+2Security and Defence]defencesciencereview.com.plpdf 216776 135052Defence Science ReviewDEFENCE SCIENCE REVIEWby A Karkadakattil · 2026 · Cited by 1 — S Aerosol and Dust Scattering: Smoke, dust, and poll…
High-power microwave systems pursue a different mechanism. Instead of burning through the airframe, they seek to couple electromagnetic energy into electronic systems, potentially disrupting or damaging processors, sensors, communications equipment and power-management circuitry. Because the goal is electronic disruption rather than precise thermal destruction, the system can often tolerate atmospheric conditions that would significantly complicate laser engagements. [Office of Naval Research+2DRDO Publications]onr.navy.milOffice of Naval Research Directed Energy Weapons: High Power MicrowavesOffice of Naval ResearchDirected Energy Weapons: High Power MicrowavesMarch 19, 2022 — HPM weapons create beams of electromagnetic energy…
This becomes particularly relevant in scenarios involving:
- Drone swarms operating in dusty desert environments.
- Urban defence after explosions have filled streets with debris and particulate matter.
- Wildfire or industrial-smoke conditions around critical infrastructure.
- Battlefield environments where obscurants are deliberately deployed.
Several contemporary counter-drone microwave concepts emphasise the ability to affect multiple drones within a beam volume rather than engaging one target at a time. In degraded visibility, this can provide operational resilience when optical tracking and laser propagation become more challenging. [DroneShield+2RTX]droneshield.comDrone Shield A Counter to Drone Swarms: High-Power MicrowaveA Counter to Drone Swarms: High-Power Microwave…July 22, 2025 — Military forces must prioritise a counter to drone swarming…
Importantly, “safer layer” in this context refers to the probability that the defence remains functional despite atmospheric obscuration. It does not mean the microwave option is automatically superior in every engagement. Lasers may still offer greater precision, lower collateral electromagnetic effects and more predictable damage mechanisms under clear conditions. [DRDO Publications]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
Why Smoke Does Not Automatically Guarantee Microwave Success
A common misconception is that smoke and dust make microwaves largely immune to environmental effects. The reality is more complicated.
Microwave systems still face fundamental propagation challenges. Energy spreads with distance, reducing field strength at the target. Atmospheric absorption can occur at some frequencies. Antenna size, beam shaping and power generation requirements all influence practical range. A microwave weapon that performs well against nearby drones may not achieve the same effects at longer distances. [DRDO Publications]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
Target characteristics also matter. Microwave effects depend on how electromagnetic energy couples into the target’s electronics. Shielding, hardening measures, circuit design and system architecture can all influence vulnerability. A target that is highly susceptible under laboratory conditions may be more resistant in operational service. [NATO Store+2ResearchGate]sto.nato.intNATO StoreHigh Power Microwaves: Threat to Infrastructure and…Over the past few decades, the potential threat from High Power Microwav…
For this reason, many defence planners view lasers and microwaves as complementary layers rather than direct substitutes. Smoke and dust may shift the balance towards microwave engagement, but they rarely eliminate the value of optical systems entirely. [DRDO Publications]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
Electromagnetic Safety and Interference Risks
The same properties that allow high-power microwaves to affect electronics also create operational risks that do not arise in the same way with laser weapons.
One concern is unintended electromagnetic interaction with nearby systems. Military platforms increasingly depend on dense networks of sensors, communications equipment and digital control systems. High-power microwave use requires careful management to avoid unintended effects on friendly electronics operating within the engagement area. NATO and other defence organisations have devoted significant attention to the vulnerability of military and civilian electronic infrastructure to intense microwave fields. [NATO Store]sto.nato.intNATO StoreHigh Power Microwaves: Threat to Infrastructure and…Over the past few decades, the potential threat from High Power Microwav…
Human safety is another factor. Microwave and radio-frequency energy can produce biological effects primarily through tissue heating when exposure levels are sufficiently high. Safety standards therefore focus on controlling power density, exposure duration and access to hazardous zones around operating systems. [Office of Environment, Health & Safety]ehs.berkeley.eduOffice of Environment, Health & Safety Module 2Office of Environment, Health & SafetyModule 2 - Microwave and Radiofrequency Radiation SafetyThe hazards from exposure to microwave/RF r…
Operational planners must therefore balance several competing objectives:
- Maintaining enough microwave power to disrupt hostile electronics.
- Preventing interference with friendly systems.
- Protecting operators and bystanders from hazardous exposure.
- Preserving effectiveness at tactically useful ranges.
These requirements can impose deployment constraints that are very different from those associated with laser systems, even when atmospheric conditions favour microwave propagation. Office of Environment, Health & Safety+2NATO Store [ehs.berkeley.edu]ehs.berkeley.eduOffice of Environment, Health & Safety Module 2Office of Environment, Health & SafetyModule 2 - Microwave and Radiofrequency Radiation SafetyThe hazards from exposure to microwave/RF r…
What “Bad Air Favors Microwaves” Really Means
Smoke and dust do not transform microwave weapons into universally superior solutions. Rather, they reduce one of the major advantages enjoyed by lasers under clear conditions: efficient delivery of tightly focused optical energy.
When airborne particles become dense enough to scatter and attenuate laser beams, microwave systems often retain a greater proportion of their operational capability because their longer wavelengths interact less strongly with those particles. That makes them an attractive defensive layer for counter-drone and air-defence missions in degraded atmospheric conditions. At the same time, microwave systems continue to face their own limitations involving range, electronic hardening, electromagnetic compatibility and exposure safety. Office of Environment, Health & Safety+3DRDO Publications+3Defence Science Review [publicationsdrdo.in]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
The result is not a simple replacement of lasers by microwaves. Instead, smoky and dusty environments strengthen the case for layered directed-energy architectures in which microwave systems provide resilience when optical conditions become unfavourable. [DRDO Publications+2RTX]publicationsdrdo.inDRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy…by L Christie · 2026 — The paper compares HPM DEWs with hi…
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Endnotes
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Source: researchgate.net
Link: https://www.researchgate.net/figure/Wavelengths-of-common-military-lasers_tbl1_374896715Source snippet
Wavelengths of common military lasers.The wavelength of common military lasers (Table 1) is largely in the range of 0.249~12...
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Source: rtx.com
Link: https://www.rtx.com/raytheon/what-we-do/integrated-air-and-missile-defense/phaser-high-power-microwave -
Source: droneshield.com
Title: Drone Shield A Counter to Drone Swarms: High-Power Microwave
Link: https://www.droneshield.com/blog/a-counter-to-drone-swarms-high-power-microwave-weaponsSource snippet
A Counter to Drone Swarms: High-Power Microwave...July 22, 2025 — Military forces must prioritise a counter to drone swarming...
Published: July 22, 2025
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Source: sto.nato.int
Link: https://www.sto.nato.int/document/high-power-microwaves-threat-to-infrastructure-and-military-equipment/Source snippet
NATO StoreHigh Power Microwaves: Threat to Infrastructure and...Over the past few decades, the potential threat from High Power Microwav...
-
Source: researchgate.net
Link: https://www.researchgate.net/publication/3056672_Susceptibility_of_Electronic_Systems_to_High-Power_Microwaves_Summary_of_Test_ExperienceSource snippet
Susceptibility of Electronic Systems to High-Power...This ensures their reliable and safe operation in complex electromagnetic Over the...
-
Source: electronic.se
Title: standards methods and issues of destructive high power microwave testing
Link: https://www.electronic.se/2015/05/26/standards-methods-and-issues-of-destructive-high-power-microwave-testing/Source snippet
Electronic EnvironmentStandards, Methods and Issues of Destructive High-Power...26 May 2015 — In this article, we present issues with hi...
Published: May 2015
-
Source: researchgate.net
Title: 347147306 Testing the [efficiency]({{ ‘efficiency/’ | relative_url }}) of laser technology to destroy the rogue drones
Link: https://www.researchgate.net/publication/347147306_Testing_the_efficiency_of_laser_technology_to_destroy_the_rogue_dronesSource snippet
(PDF) Testing the efficiency of laser technology to destroy...24 Nov 2020 — The objective of the article is to present a study on the co...
-
Source: publicationsdrdo.in
Link: https://publicationsdrdo.in/index.php/dsj/article/download/21114/8787/92344Source snippet
DRDO PublicationsThe Strategic Role of High-Power Microwave Directed Energy...by L Christie · 2026 — The paper compares HPM DEWs with hi...
-
Source: defencesciencereview.com.pl
Title: pdf 216776 135052
Link: https://www.defencesciencereview.com.pl/pdf-216776-135052?filename=Laser-Based-Directed-Ener.pdfSource snippet
Defence Science ReviewDEFENCE SCIENCE REVIEWby A Karkadakattil · 2026 · Cited by 1 — S Aerosol and Dust Scattering: Smoke, dust, and poll...
-
Source: sciencepublishinggroup.com
Link: https://www.sciencepublishinggroup.com/article/10078580Source snippet
Effect of Water and Aerosols Absorption on Laser Beam...To realize optical wireless power transmission, atmospheric propagation of eye-s...
-
Source: securityanddefence.pl
Link: https://securityanddefence.pl/Testing-the-efficiency-of-laser-technology-to-destroy-the-rogue-drones%2C127360%2C0%2C2.htmlSource snippet
Testing the efficiency of laser technology to destroy...by MZ Chaari · 2020 · Cited by 17 — We aim to prove that high energy fixed laser...
-
Source: onr.navy.mil
Title: Office of Naval Research Directed Energy Weapons: High Power Microwaves
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 MicrowavesMarch 19, 2022 — HPM weapons create beams of electromagnetic energy...
Published: March 19, 2022
-
Source: ehs.berkeley.edu
Title: Office of Environment, Health & Safety Module 2
Link: https://ehs.berkeley.edu/non-ionizing-radiation-non-laser-manual/module-2-microwave-and-radiofrequency-radiation-safetySource snippet
Office of Environment, Health & SafetyModule 2 - Microwave and Radiofrequency Radiation SafetyThe hazards from exposure to microwave/RF r...
Additional References
-
Source: scispace.com
Link: https://scispace.com/pdf/experimental-study-of-the-influence-of-aerosol-particles-on-37r271wxxi.pdfSource snippet
Experimental study of the influence of aerosol particles on...Laser as a from of EM wave unavoidable suffers all of these effects, which...
-
Source: eos-aus.com
Title: forbes why lasers and microwave weapons are next generation drone killers
Link: https://eos-aus.com/news/forbes-why-lasers-and-microwave-weapons-are-next-generation-drone-killers/Source snippet
Forbes: Why Lasers and Microwave Weapons are Next...3 Mar 2026 — In Forbes, Zita Ballinger Fletcher examines the growing relevance of la...
-
Source: scispace.com
Link: https://scispace.com/pdf/electromagnetic-pollution-of-the-environment-due-leakage-18rz5qrcut.pdfSource snippet
ee types of microwave ovens with the values available in scientific literature...Read more...
-
Source: aeromorning.com
Title: directed energy counter drone rf vs laser drone hardening
Link: https://aeromorning.com/en/directed-energy-counter-drone-rf-vs-laser-drone-hardening/Source snippet
Directed-Energy Counter-Drone: RF vs Laser...10 Jun 2026 — Comparison of counter-drone directed-energy systems: RF RapidDestroyer vs MBD...
-
Source: link.aps.org
Title: organd mid-infrared laser-produced plasmas in air | Phys
Link: https://link.aps.org/doi/10.1103/PhysRevA.104.013107Source snippet
Rev. Aby A Englesbe · 2021 · Cited by 26 — Changing the laser wavelength increases the microwave power by 100 times and changing the inpu...
-
Source: pdfs.semanticscholar.org
Link: https://pdfs.semanticscholar.org/0ff8/e9e063f1e14d6e5ff191383b27b510685800.pdfSource snippet
of Water and Aerosols Absorption on Laser Beam...by Y Shuto · 2023 · Cited by 9 — Atmospheric propagation of laser beams at eye-safe wav...
-
Source: fda.gov
Title: microwave ovens
Link: https://www.fda.gov/radiation-emitting-products/resources-you-radiation-emitting-products/microwave-ovensSource snippet
U.S. Food and Drug AdministrationMicrowave Ovens12 Oct 2023 — A damaged microwave oven may present a risk of microwave energy leaks...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9409438/Source snippet
Radiation and the Brain: Mechanisms, Current...by S Mumtaz · 2022 · Cited by 160 — In this review, recent approaches examining the effec...
-
Source: arxiv.org
Link: https://arxiv.org/abs/2602.08477 -
Source: deps.org
Title: JV2N1P5 Sprangle
Link: https://www.deps.org/DEPSpages/JDE/JV2N1P5-Sprangle.pdfSource snippet
95 - Optimum Wavelength and Power for Efficient Laser...by P Sprangle · 2006 · Cited by 81 — The optimum wavelength for efficient HEL pr...
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