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from day 1 I suspected microwave radiation. my theory was that it was microwave excitation of a passive bug, something like the infamous bug the Soviets planted in the Great Seal.
it is interesting to think about a microwave pulse generator with a focused high gain antenna. short pulses could be hard to detect with a traditional spectrum analyzer, particularly if the frequency jumps around
another possibility: organophosphates and pyrethroid insecticides overused due to the Zika scare. 🤷♂️
Andrew Zonenberg@tubetime The extremely sudden onset of symptoms in a lot of cases seems less consistent with poisoning and more with "somebody stuck their head in the beam path"
@azonenberg or "application of powerful insecticide an hour before"
Eric Brombaugh@tubetime My first job out of college I worked on radar detection in the 2-18GHz range. There are good broadband pulse detection techniques available but you need a lot of parallelism and I've often wondered just how much effort was expended to analyze the RF environment in these Havana Syndrome cases.
Laberpferd@tubetime thats the thing that should have been easily found by "Bug Detectors" which are intentionally wideband receivers, perhaps even a radar warner if it covers the right frequency band
Marsh Ray@tubetime But would short pulses allow one to obtain intelligible audio?
Or would it simply be used to charge a battery and-or activate a high bandwidth download?
Jeff Haluska
John-Mark Gurney@encthenet @tubetime I could see that, but you’d still have to increase the power to compensate for a smaller duty cycle.
I’m no expert, but it seems like any beam transferring enough power to usefully charge an energy storage capacitor or battery ought to stand out on an SA.
I’m no expert, but it seems like any beam transferring enough power to usefully charge an energy storage capacitor or battery ought to stand out on an SA.
@encthenet
even better you could use a pseudorandom pattern of pulses, to an receiver who does not know the pattern (to synchronously control the sample and hold stage) this appears as just some noise but gives no hint to an active microphone
@tubetime unintended side effects of a bugging technique is a theory i've heard before and is the most plausible explanation to date
Tom Anderson@tubetime This type of pulse is easy to detect in the time domain with a diode detector and an oscilloscope. Throw in a log amp after the detector to be fancy about it.
@tubetime even a big dish antenna has enough sidelobes such that detection of high power pulse transmitters is easy.