Radio control is a legacy architecture for tactical combat.

of tactical front-line strike drones deployed in high-intensity combat zones already operate in complete RF silence.

of military drones are projected to execute their missions in complete RF silence.

Fibre-optic guided FPV No emission to detect. No link to jam.

Narrow-beam satellite uplinks Directional, and invisible from the side.

Terminal AI autonomy Edge guidance, silent through the final approach.

Pronounced “mew naught” — after μ0, the magnetic constant.

Active Near-Field Magnetic Radar (ANFMR) for Autonomous Air Defence

ANFMR forces the internal, unshieldable permanent magnets of a drone’s brushless motor to generate distinctive, high-confidence frequency sidebands. The threat identifies itself by its physics, not by its radio.

50 000nT Earth’s field, zeroed by gradiometric subtraction

26pT Target sidebands extracted

<300ms To physical authentication

30–40m Induction zone

The technology we use: quasi-static near-field magnetic coupling.

AMI Active Magnetic Interrogation We drive the target rather than wait for it. An applied low-frequency field makes the permanent magnets inside a brushless motor answer.

NFMR Near-Field Magnetic Radar Operates inside the induction zone, where coupling is quasi-static and indifferent to composites, coatings and radio silence.

GMS Gradient Magnetostatic Sensing Spatial subtraction across a gradiometer array zeroes Earth’s 50 000 nT field and leaves only what is close and moving.

ASR Active Sideband Radar We do not look for echoes. We look for sidebands: new frequencies the motor itself is forced to create.

MI-RADAR Magnetic Interrogation & Ranging Locates and ranges the authenticated source, and hands a firing-quality cue to the effector.

Farrman does not replace early warning. It authenticates at the last line.

A definitive physical trigger, independent of radio, for short-range Directed Energy Weapons (DEW) and High-Power Microwave (HPM) effectors — neutralising RF-silent threats in the terminal phase, before payload delivery.

I

Long-range, low-cost sensors — passive acoustic arrays, thermal cameras, conventional micro-radar — detect a fast-moving object kilometres away and slew an interceptor toward it. Under heavy jamming they cannot say whether it is a hostile autonomous drone, a fibre-optic drone, a friendly asset, or a bird.

II

The object enters the forty-metre induction zone. Within 300 milliseconds the array isolates the physical motor sidebands and confirms what it is: a spinning permanent-magnet motor, travelling at 40 m/s. The target is authenticated.

III

An automated point-defence intercept system or kinetic C-RAM effector needs only a fraction of a second to track and engage a terminal threat. Farrman gives it that fraction.

Effector cue High-power microwave burst

The moment the sideband signature is validated, a localised, directional electromagnetic or microwave burst is triggered.

Effector cue Directional net interception

For smaller tactical threats, the 300 ms cue fires automated pneumatic net-cannons that wrap the propellers and disable the motor before it reaches the asset.

B ∝ 1/r3

Short-range by design.

The near field falls with the cube of distance. We do not claim to see kilometres. We hold the last forty metres, around the assets that matter most.

From workbench to field. Then to the femtotesla.

Now · TRL 6 Bench-top LC circuit prototypes

Active interrogation and sideband extraction, proven on the bench.

24 months · TRL 8 Field-deployed effector cueing

Ruggedised, automated systems cueing effectors in the field.

Horizon · On the workbench Diamond NV-centre gradiometers

Laser-threshold, optically pumped. Already on the workbench, targeting femtotesla baseline accuracy.