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3:12 AM
@uhoh Even though the bounty has expired, this is still kind of intriguing.
 
3:51 AM
@MikeWaters I've had more than one bounty on that question. Yep, it's quite a mystery!
 
I am not 100% certain that it is fabric, although some of the photos seem to prove it.
Some photos seem to be a reflection from that black material lining the room.
Why don't you ask the question here on hamSE? There's a lot of experience here! @Glenn-W9IQ comes to mind as someone who might know.
 
4:08 AM
There are others besides Glenn.
 
4:36 AM
it's not clearly on-topic and cross-posting is generally disallowed, so no, that would not be a good idea.
 
4:55 AM
It is about the technology of radio, isn't it? Whatever.
 
 
11 hours later…
3:49 PM
Yes, it's an antenna design and on-topic in that way, but I think it's probably a little too space-specific.
hmm looking at the existing answer changes my hypothesis of What The Correct Answer Looks Like, but still, I also doubt it would get a better answer here.
 

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