Havana syndrome: NSA officer’s case hints at microwave attacks since 90s

Post by kragen » Tue, May 04, 2021, 2:06 PM UTC

iudqnolq wrote: post #207

kragen wrote: post #111

Earlier quoted context omitted.

The fact that reverse thermal gradients are often present in microwave thermal processing of materials is quite well known and can be replicated in food in your home microwave, precisely as nabla9 said, regardless of Mythbusters being able to produce a forward thermal gradient. Microwaves attenuate as they penetrate a resistive or high-permittivity substance, because they deposit some of their energy as they pass thr…

I'm not sure why my sibling is downvoted. See for example page E-17 of this manual > When the radar transceiver is energized, it poses a microwave radiation hazard to personnel. The hazard distance for the Q-47 is much greater than the distance for the Q-37. The hazard distance for troops extends in front of the radar for 217 meters over the radars full 1600-mil area of scan. The radar also poses a hazard for electri…

Post by whereis » Tue, May 04, 2021, 8:17 PM UTC

l332mn wrote: post #212

whereis wrote: post #209

Earlier quoted context omitted.

Evidence comes in many forms. There's definitely evidence unless the govt is completely fabricating the existence of these injuries (which is unlikely).

I don't think you're following.

Post by l332mn » Wed, May 05, 2021, 9:16 AM UTC

whereis wrote: post #213

l332mn wrote: post #212

Earlier quoted context omitted.

I don't think you're following.

No, it's perfectly clear. Evidence comes in many forms. There doesn't appear to be evidence in the form of a recovered weapon or technical recording/logging of an attack as it happened, at least nothing that has been disclosed. However, the injuries are real and ongoing. It took a long time for consensus agreement that these events were malicious targeting by hostile govts against our diplomats, using remote energy w…

Post by bArray » Wed, May 05, 2021, 4:47 PM UTC

Jenda_ wrote: post #182

nabla9 wrote: post #48

Earlier quoted context omitted.

Microwave transmitters are not that big. 4 kW generator or 100 kW pulse generator fits into a suitcase. What you need is a horn antenna that directs the beam from the distance, across the street for example. It's also possible to have multiple horns around the target. Only in the intersection of the beams the radiation reaches dangerous levels.

Horn antennas have radiation pattern tens of degrees wide, so it's difficult to target one room across the street. I'm not sure intersecting a few of them helps, maybe by a factor of two or so. Back of the envelope math: per Wikipedia: "The gain of horn antennas ranges up to 25 dBi, with 10 - 20 dBi being typical." Let's say you are transmitting 4 kW with a 20 dBi horn, thus having 400 kW EIRP. At a distance of 15 me…

Post by bArray » Wed, May 05, 2021, 4:51 PM UTC

dv_dt wrote: post #69

bArray wrote: post #28

Are microwave attacks something that is proven to exist? Can we replicate the effects on mice from some distance? Given the fact they pass through walls, this kind of bounds the frequency range the attacks could exist in... I would expect to see radio interference on nearby devices, etc (even if operating on a different frequency). I wouldn't be entirely surprised if these could be self-manifesting symptoms from peop…

Wouldn’t it be ironic if this was some secret comm equipment that the US is installing in its own embassies