RF Investigation Services is the independent diagnostic practice of an RF and microwave engineer with four decades in the field — someone who spends the rest of the week designing transmitters, not just chasing them. That's the difference: an engineer who builds RF hardware knows exactly how it misbehaves.
Most people called to an interference problem come at it from networking or IT. I come at it from the other end of the bench — designing bespoke RF and microwave systems, where understanding emissions, antennas, mixing products and the behaviour of a transmitter is the day job.
That design work runs through K9 Electronics Ltd, a UK manufacturer of specialist RF systems for defence and security clients. The same engineering that goes into building a clean, controlled emitter is exactly what's needed to track down a dirty, unwanted one.
There's also a counter-surveillance and TSCM heritage here — years spent locating hidden and rogue transmitters that don't want to be found. Hunting a signal across a noisy spectrum, working out what it is and where it lives, isn't a sideline. It's the core craft.
Put together, that's a practice that can walk onto your site, characterise the RF environment properly, prove what's causing the problem — and then engineer and fabricate the fix in-house rather than writing it up and walking away.
Knowing how transmitters, antennas and mixers actually behave means recognising the signature of a problem fast — not working it out from a textbook on site.
Locating signals that don't want to be found is a discipline in its own right. Direction finding and signal hunting are second nature, not an occasional task.
A real workshop — CNC, fabrication, RF bench — means shielding, filters and remedies can be built and fitted in-house, not subcontracted out with a delay.
The hardest faults are the intermittent ones — the dropout that lasts a few seconds, the signal that hops, the emitter that comes and goes. A traditional swept analyser looks at one slice of the band at a time, so a brief signal can slip through the gap and vanish before the sweep comes back to it. I work with real-time analysis that watches the whole span at once, so the transient, intermittent and hopping signals that defeat guesswork get caught and captured.
Continuous, gap-free analysis across the band catches brief and intermittent emitters — the exact cause of "it only happens sometimes" problems.
The event is recorded as it happens — frequency, level, timing — so you get documented proof rather than "you had to be there."
Direction finding walks the signal back to the physical device or location producing it — indoors, in a vehicle, or across a site.
No Wi-Fi kit, boosters or radios sold here. The diagnosis has no agenda.
Findings you can act on and put in front of management — not a wall of jargon.
You know the cost of a callout before I leave the workshop. No meter running.
Based in the East Midlands, attending sites across the country.
No call centre and no scripted triage. Your enquiry is reviewed by an RF engineer.