Researchers create super-efficient Wi-Fi

While this is interesting work, I would say it's going into the wrong direction. It is simplifying the devices at the cost of less efficient use of the already crowded radio spectrum (the plugged-in device must transmit the carrier wave and the reflections from passive devices consume twice the spectrum due to mirror frequencies) Everyone else is going the other way: complicating devices to achieve higher spectrum efficiency. This approach might be sustainable for spy agencies, but I don't see how it could scale to mass deployment (especially with device densities predicted by IoT pundits these days).

Mentioned in the article is the passive bug the Soviets used for covert listening in the US embassy in Moscow. Impressive technology for 1945: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;The_Thing_%28listening_device%29" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;The_Thing_%28listening_device%...</a>

Wondering why the two passive devices have the same mac address...

The same researchers released a video demonstrating the basics of this (though not with WiFi) a few years ago:<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=gX9cbxLSOkE" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=gX9cbxLSOkE</a><p><a href="https:&#x2F;&#x2F;homes.cs.washington.edu&#x2F;~gshyam&#x2F;Papers&#x2F;amb.pdf" rel="nofollow">https:&#x2F;&#x2F;homes.cs.washington.edu&#x2F;~gshyam&#x2F;Papers&#x2F;amb.pdf</a>

Wonder why they chose the UK &quot;health lottery&quot; - quite a small lottery, vs the UK National Lottery ?

This is pretty incredible, and congrats to the research team!<p>But, could you please not use phrasing like &quot;Reduces Power 10,000x&quot;. I don&#x27;t think I&#x27;m the only that has an aversion to this: <a href="http:&#x2F;&#x2F;timesless.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;timesless.com&#x2F;</a>