Within 2023 Test
Can One Microwave Beam Stop Many Drones?
A wide microwave effect changes counter-swarm defence by trying to disrupt several drones at once instead of fighting them one by one.
On this page
- Why one to many engagement is different
- How wide area effects compare with laser dwell time
- What the public test did and did not show
Page outline Jump by section
Introduction
The key idea behind THOR is not simply that it uses microwaves instead of missiles or lasers. Its significance lies in the fact that its microwave energy affects an area rather than a single point. Against a drone swarm, that distinction matters enormously. A swarm can overwhelm traditional defences by presenting many targets at once, forcing defenders to spend time, ammunition or laser dwell time on each individual drone. THOR was designed around a different concept: engage several drones within a single microwave-affected volume and disrupt them simultaneously. AFRL’s 2023 swarm demonstration was important largely because it tested this one-to-many engagement model rather than another single-target intercept. [Air Force Research Laboratory]afresearchlab.comIt operates from a wall plug and uses energy to disable drones. THOR, a first of its kind system…
Why One-to-Many Engagement Is Different
Drone swarms create a problem of scale. Even relatively simple drones become dangerous when dozens arrive together because the defender must react faster than the swarm can spread out or reach its target. Traditional kinetic weapons and many laser systems face what military planners sometimes call an engagement-capacity problem: each shot or engagement typically addresses one target at a time.
THOR was developed specifically to counter this challenge. AFRL describes it as a counter-swarm high-power microwave weapon intended to defeat multiple targets non-kinetically rather than engaging them individually. The system emits powerful microwave pulses intended to interfere with or disable drone electronics inside the affected region. [Air Force Research Laboratory]afresearchlab.comIt operates from a wall plug and uses energy to disable drones. THOR, a first of its kind system…
The practical consequence is that defensive effectiveness is not tied as closely to the number of drones. If several aircraft are inside the microwave footprint at the moment of firing, multiple targets may be affected by a single pulse. AFRL officials repeatedly highlighted THOR’s “wide beam” as one of the primary reasons the system performed effectively during the 2023 swarm demonstration. [Air Force Research Laboratory]afrl.af.milrl conducts swarm technology demonstrationAir Force Research LaboratoryAFRL conducts swarm technology demonstration16 May 2023 — “THOR was exceptionally effective at disabling the…
This does not mean every drone within sight is automatically disabled. Public information does not reveal exact beam dimensions, effectiveness rates or operational ranges. However, the underlying concept is clear: the weapon’s value comes from engaging groups of drones rather than conducting a sequence of individual engagements. [The War Zone]twz.comThe War Zone THOR Microwave Anti-Drone System Downs Swarms In TestThe War ZoneTHOR Microwave Anti-Drone System Downs Swarms In TestMay 19, 2023 — The demonstration pitted the service's high-power microwa…
How Wide-Area Effects Compare with Laser Dwell Time
The contrast between microwave weapons and lasers is often described in terms of dwell time.
A laser normally concentrates energy on a very small spot. To damage a target, it generally must remain focused on that point long enough to heat or burn through critical components. After one target is defeated, the laser shifts to the next. The process can be extremely effective, but it remains fundamentally sequential. [U.S. Air Force]af.milrls thor hammers drones in new video animationAir ForceAFRL's THOR hammers drones in new video animationJun 16, 2021 — High energy lasers kill one target at a time, and high powered m…
High-power microwave systems such as THOR pursue a different mechanism. Instead of concentrating energy onto one precise location, they create a broader electromagnetic effect across a volume of space. Multiple drones within that volume may experience disruption at nearly the same moment. The engagement therefore scales differently when faced with a cluster of inexpensive aircraft arriving together. [Journal of Electromagnetic Dominance]jedonline.comhigh power microwave systems getting much much closer to operational statusJournal of Electromagnetic DominanceHigh-Power Microwave Systems – Getting (Much…Jan 24, 2023 — The conical shape of the beam means th…
This difference explains why military discussions frequently describe lasers and microwaves as complementary rather than competing technologies:
- Lasers offer precision and can selectively engage individual targets.
- High-power microwaves offer wider-area effects that may influence several drones simultaneously.
- A layered defence can use both approaches depending on swarm density and tactical circumstances. [Air University]airuniversity.af.eduarmy partners with air forces thor for base defenseAir UniversityArmy partners with Air Force's THOR for base defense23 Feb 2021 — THOR is a prototype directed energy weapon used to disabl…
The U.S. Army’s directed-energy planning has explicitly highlighted this distinction, noting that lasers typically kill one target at a time while high-power microwaves can engage groups or swarms. [Air University]airuniversity.af.eduarmy partners with air forces thor for base defenseAir UniversityArmy partners with Air Force's THOR for base defense23 Feb 2021 — THOR is a prototype directed energy weapon used to disabl…
What the Public Test Did and Did Not Show
The April 2023 AFRL demonstration is often cited as evidence that THOR can stop drone swarms. The more precise conclusion is that the test supported the central theory behind the system: a wide-beam microwave weapon can engage multiple airborne drones during a swarm-style attack scenario. AFRL reported that numerous drones were flown against the system and that THOR successfully engaged the swarm. Officials specifically credited the weapon’s wide beam, high peak power and tracking capability for the outcome. [Air Force Research Laboratory+2DVIDS]afrl.af.milrl conducts swarm technology demonstrationAir Force Research LaboratoryAFRL conducts swarm technology demonstration16 May 2023 — “THOR was exceptionally effective at disabling the…
The test therefore demonstrated that the one-to-many engagement concept was workable under the conditions used in the exercise. It was not merely a repeat of earlier demonstrations against isolated drones. AFRL characterised it as the largest THOR test conducted up to that point and the first test of that scale in the programme’s history. Air Force Research Laboratory+2Air & Space Forces Magazine [afrl.af.mil]afrl.af.milrl conducts swarm technology demonstrationAir Force Research LaboratoryAFRL conducts swarm technology demonstration16 May 2023 — “THOR was exceptionally effective at disabling the…
At the same time, the demonstration did not reveal several critical details:
- The number of drones successfully affected by each pulse.
- Exact engagement ranges.
- Performance against more sophisticated or dispersed swarms.
- Effectiveness against hardened or highly varied drone electronics.
- Results under battlefield conditions involving terrain, weather, deception or electronic countermeasures. The War Zone+2Air & Space Forces Magazine [twz.com]twz.comThe War Zone THOR Microwave Anti-Drone System Downs Swarms In TestThe War ZoneTHOR Microwave Anti-Drone System Downs Swarms In TestMay 19, 2023 — The demonstration pitted the service's high-power microwa…
As a result, the test validated the concept more than it proved operational dominance.
Why the Wide Beam Remains the Central Idea
Among all publicly discussed THOR features, the wide microwave beam is the characteristic most closely tied to the swarm problem itself. Mobility, tracking systems and power generation all matter, but those features support the core mechanism rather than define it.
The fundamental challenge posed by drone swarms is numerical saturation: many inexpensive targets arriving at once. THOR’s design attempts to answer that challenge by changing the engagement geometry. Instead of allocating defensive effort target by target, the system seeks to affect multiple drones within a broader electromagnetic footprint. AFRL’s own descriptions of the 2023 demonstration repeatedly emphasised that wide-beam capability because it is the feature that most directly addresses swarm economics and swarm timing. [Air Force Research Laboratory+2Unmanned Airspace]afrl.af.milrl conducts swarm technology demonstrationAir Force Research LaboratoryAFRL conducts swarm technology demonstration16 May 2023 — “THOR was exceptionally effective at disabling the…
That is why the 2023 test mattered. The demonstration was not primarily a proof that microwaves can disable drones—a capability already demonstrated in earlier work. Its significance was that THOR applied that effect against a swarm-style target set and provided evidence that a wide-area microwave approach can engage several drones quickly enough to remain relevant against the growing challenge of massed unmanned aircraft. Air Force Research Laboratory+2Air Force Research Laboratory [afresearchlab.com]afresearchlab.comIt operates from a wall plug and uses energy to disable drones. THOR, a first of its kind system…
Amazon book picks
Further Reading
Books and field guides related to Can One Microwave Beam Stop Many Drones?. Use these as the next step if you want deeper reading beyond the article.
The Kill Chain
Discusses how emerging technologies are evaluated and adopted by militaries.
Introduction to Electronic Defense Systems
First published 1991. Subjects: Electronics in military engineering.
eBay marketplace picks
Marketplace Samples
Example marketplace items related to this page. Use the search link to explore similar finds on eBay.
Endnotes
-
Source: afresearchlab.com
Link: https://afresearchlab.com/counter-swarm-high-power-weapon/Source snippet
It operates from a wall plug and uses energy to disable drones. THOR, a first of its kind system...
-
Source: afrl.af.mil
Title: rl conducts swarm technology demonstration
Link: https://www.afrl.af.mil/News/Article-Display/Article/3396995/afrl-conducts-swarm-technology-demonstration/Source snippet
Air Force Research LaboratoryAFRL conducts swarm technology demonstration16 May 2023 — “THOR was exceptionally effective at disabling the...
Published: May 2023
-
Source: airuniversity.af.edu
Title: army partners with air forces thor for base defense
Link: https://www.airuniversity.af.edu/News/Display/Article/2511792/army-partners-with-air-forces-thor-for-base-defense/Source snippet
Air UniversityArmy partners with Air Force's THOR for base defense23 Feb 2021 — THOR is a prototype directed energy weapon used to disabl...
-
Source: unmannedairspace.info
Link: https://www.unmannedairspace.info/counter-uas-systems-and-policies/us-air-force-research-laboratory-demonstrates-anti-drone-swarm-c-uas-technology/Source snippet
US Air Force Research Laboratory demonstrates anti-...“THOR was exceptionally effective at disabling the swarm with its wide beam, high...
-
Source: twz.com
Title: The War Zone THOR Microwave Anti-Drone System Downs Swarms In Test
Link: https://www.twz.com/thor-microwave-anti-drone-system-downs-swarms-in-testSource snippet
The War ZoneTHOR Microwave Anti-Drone System Downs Swarms In TestMay 19, 2023 — The demonstration pitted the service's high-power microwa...
Published: May 19, 2023
-
Source: af.mil
Title: rls thor hammers drones in new video animation
Link: https://www.af.mil/News/Article-Display/Article/2658386/afrls-thor-hammers-drones-in-new-video-animation/Source snippet
Air ForceAFRL's THOR hammers drones in new video animationJun 16, 2021 — High energy lasers kill one target at a time, and high powered m...
-
Source: jedonline.com
Title: high power microwave systems getting much much closer to operational status
Link: https://www.jedonline.com/2023/01/24/high-power-microwave-systems-getting-much-much-closer-to-operational-status/Source snippet
Journal of Electromagnetic DominanceHigh-Power Microwave Systems – Getting (Much...Jan 24, 2023 — The conical shape of the beam means th...
-
Source: dvidshub.net
Link: https://www.dvidshub.net/video/904353/afrls-thor-tracks-and-disables-drone-swarmSource snippet
AFRL's THOR Tracks and Disables Drone Swarm"Numerous drones were flown to simulate a swarm attack, and using its wide beam, high peak pow...
-
Source: airandspaceforces.com
Title: air forces thor drone swarm demo
Link: https://www.airandspaceforces.com/air-forces-thor-drone-swarm-demo/Source snippet
Using a wide beam, THOR can take out multiple drones at a time, using a video game-like interface.Read more...
-
Source: usfk.mil
Link: https://www.usfk.mil/What-We-Do/Exercises/Freedom-Shield/?dvpTag=Thor&videoid=904340Source snippet
Tactical High-power Operational ResponderTactical, High-power, Operational, Responder, known as THOR, is a high power microwave counter-d...
-
Source: afrl.af.mil
Link: https://www.afrl.af.mil/News/Video/?dvpTag=Thor&dvpmoduleid=69743Source snippet
af.milVideoTactical, High-power, Operational Responder, known as THOR, is a high-power microwave [counter-drone]({{ 'missile-savings/' | relative_url }}) weapon that the Air Force...
-
Source: afrl.af.mil
Link: https://www.afrl.af.mil/News/Photos/igphoto/2003223867/Source snippet
High-power Operational ResponderA high-powered microwave counter drone weapon, stands ready to demonstrate its effectiveness against a sw...
-
Source: dvidshub.net
Link: https://www.dvidshub.net/video/904340/thor-tactical-high-power-operational-responderSource snippet
Thor - Tactical High-power Operational ResponderTHOR is a high power microwave counter-drone weapon that the Air Force Research Lab has d...
-
Source: afresearchlab.com
Link: https://afresearchlab.com/thor/Source snippet
THOR - Air Force Research LaboratoryTHOR · Have a question for AFRL? CONTACT US.Read more...
-
Source: youtube.com
Title: US Army’s Latest Microwave Weapon ‘THOR’ Can Thwart Enemy Swarm-Drone Attacks
Link: http://www.youtube.com/watch?v=aD57LLoTSdUSource snippet
US Air Force Shuts Down Drone with Unbelievable New Technology! | Microwave Weapon...
-
Source: youtube.com
Link: http://www.youtube.com/watch?v=XRnbuSaBR1ISource snippet
Epirus Leonidas: High-Power Microwave for Counter-Electronics...
Additional References
-
Source: techbriefs.com
Link: https://www.techbriefs.com/component/content/article/49907-meet-thor-afrls-counter-drone-that-tracks-and-disables-drone-swarmSource snippet
Meet THOR: AFRL's Counter-Drone that Tracks and...THOR is a high-power microwave counter-drone weapon that the Air Force Research Lab ha...
-
Source: kirtland.af.mil
Link: https://www.kirtland.af.mil/News/Photos/igphoto/2003223977/Source snippet
Tactical High-power Operational ResponderThe Tactical High-power Operational Responder, or THOR, a high-powered microwave counter drone w...
-
Source: merriam-webster.com
Link: https://www.merriam-webster.com/dictionary/high -
Source: ndupress.ndu.edu
Title: countering swarms strategic considerations and opportunities in drone warfare
Link: https://ndupress.ndu.edu/Media/News/News-Article-View/Article/3197193/countering-swarms-strategic-considerations-and-opportunities-in-drone-warfare/Source snippet
Strategic Considerations and Opportunities in Drone Warfare24 Oct 2022 — THOR presents a particularly effective capability to counter dro...
-
Source: youtube.com
Link: https://www.youtube.com/watch?v=0pwv1BOuqN4Source snippet
AFRL's THOR Tracks and Disables Drone SwarmTactical, High-power, Operational Responder, known as THOR, is a high-power microwave counter...
-
Source: youtube.com
Link: https://www.youtube.com/watch?v=M5YyDGfKhE8Source snippet
Sanctum™ vs. the Swarm: Next-Gen Counter-UAS in ActionDrone swarms are fast, adaptive and dangerous. Defending against them requires more...
-
Source: youtube.com
Link: https://www.youtube.com/watch?v=QjHGxKb6W1cSource snippet
THOR (Tactical High-power Operational Responder) Destroys...AFRL's THOR (Tactical High-power Operational Responder) is a prototype Direc...
-
Source: taskandpurpose.com
Title: Task & Purpose Air Force’s THOR directed energy weapon ready for drone
Link: https://taskandpurpose.com/tech-tactics/air-force-thor-directed-energy-drone-swarm-test/Source snippet
Air Force's THOR directed energy weapon ready for drone...19 May 2023 — THOR “was exceptionally effective at disabling the swarm with it...
Published: May 2023
-
Source: nextgov.com
Title: /FCWAir Force Research Lab Tests Tech That Blasts Drones
Link: https://www.nextgov.com/emerging-tech/2023/05/air-force-research-lab-tests-tech-blasts-drones-down-microwaves/386526/Source snippet
Nextgov/FCWAir Force Research Lab Tests Tech That Blasts Drones...May 19, 2023 — The lab demonstrated its high-power microwave counter d...
Published: May 19, 2023
-
Source: nellis.af.mil
Title: rls thor hammers drones in new video animation
Link: https://www.nellis.af.mil/News/Article/2658386/afrls-thor-hammers-drones-in-new-video-animation/Source snippet
af.milAFRL's THOR hammers drones in new video animationJun 16, 2021 — High energy lasers kill one target at a time, and high powered micr...
Topic Tree