Tour the Russian 'Woodpecker' (DUGA): Featured in CNN Travel News

Frank,

Its an expression.

I think we all know what happens when electronics gets 'fried'. No one said anything about biological diathermy.

No one said anything about 'people getting fried'.

Missile elctronics? Yeh, maybe.

Also, you assume a 1KW delivery to the skin. Nope. A lot lower. I will let you figure out why.

73
Chip W1YW

 

Chip I would love to learn why my cabin was not a faraday cage. I have been in the cage at ARRL HQ, and except for the porthole I noted not much difference. This is not a smarty reply. I really want the benefit of your knowledge on the subject. 60 years on this planet and I am still learning. That is why I love ham radio!

 

The Soviets liked 'phase conjugation' in their laser applications, but I am not sure whether you are saying they used some synthetic aperture technique. The near field issue is not about far-field predictions, it is about avoiding air breakdown.

BTW, I love your page. But, your fractal antennas has initiated wave-chaos in my brain. I am going to have to give it some settling time.

Another, BTW. I guess Directed Energy is what we say it is. The Navy went so far as to include rail guns.

73, KR6GF

 

Heheh! Yeh, fractals R us....

What I am saying is that they phased up the array, and then took the near-delta function pulse train, and delayed it as a function of frequency to use the ionosphere to enhance the delivered power at target. They used the radar reflection to figure out the dispersion, and used the ionosphere as a lens, for the (not working) attack mode.

They found its a crappy lens.

Not just phase conjugation--- not merely trying to remove the effect of the medium, but leverage it for more gain.

(For others...) its a little like combining multipath in MIMO to realize extra gain.

Yep. dielectric breakdown set the limit of TX power per antenna. Clearly each element must have been designed for many, many megawatts. I suspect the feed line (waveguide?) to each antenna set the limit.

73
Chip W1YW

 

The hole lets charge distribute in the cabin.

 

Its about 1/20th of a wavelength in perimeter. That's not small enough to prevent 20M RF from coming in.

Typically you need holes 5-10 times smaller to stop RF such as you experienced.

 

This was covered on Discovery science channel's show 'Mysteries of the Abandoned'. It is the Russian Woodpecker. And another one is apparently being built. Its some sort of backscatter/tropo radar from what I remember of the show.

 

I seem to remember in the days the woodpecker was operating the pulses were recorded by you guys with big beams & played back to it. Initially the thing used to shut down pretty much straight away, but then they started encoding the pulses so they knew when US hams were yanking their chain. Anybody able to confirm that, or was it just some made-up story?

It got to be a sufficiently big nuisance that one of the noise blankers on the ts930, when it came out, was specifically designed to cancel the woodpecker.

 

So where are the thousands of reports of radios destroyed by tuning into the thing?

That's right, there are none.

Your math is beyond wrong.

Rege

 

No you were not, and you did not.

And there was never such a station in Mozambique.

Rege

 

Yes it was trivial to jam.

On the occasions that it did not respond to jamming it was because nobody was watching the return display!

If you want to understand more read about the "radar range equation"

https://duckduckgo.com/?q=radar+range+equation&t=fpas&ia=web

Also read about "a scope"

https://en.m.wikipedia.org/wiki/Radar_display

Then read about the "radar jamming equation"

https://duckduckgo.com/?q=radar+jamming+equation&t=fpas&ia=web

Take your best guess as to the "radar cross section" of a ballistic missile in its coast (mid course) phase

https://en.m.wikipedia.org/wiki/Intercontinental_ballistic_missile#Flight_phases

Understand that the rocket contrails during the boost phase would be indistinguishable from the ground clutter returned to the radar operator.

Rege

 

Consider sunlight is around 1000 watts per square meter....

Rege

 

Do you just string random words together to make impressive sounding reports in your professional career?

And waveguide , do you see any @$%€#! waveguide in the picture?

Rege

 

Nope.

Yes.

Sure do.

Not all waveguide is a hollow tube. Coax, for example, is a waveguide. Dont get hung up on 'zero TEM' in defining waveguide.

Transmission of waves and boundary conditions define 'waveguide'. I understand the engineering convention of 'waveguide'.

If you mean is there zero TEM 'waveguide'....I imagine it was mostly stripped from the Duga and put rubles in someone's pocket.


Now be nice and stop trying to 'stump the professor'.

 

Uhh.. What you are trying to say is.... a cage with a moderately sub wavelength hole IS a Faraday cage?