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The uBeam FAQ
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PaulReynolds:
An update on the uBeam private demo at CES, following some more conversations with those who got to see it:

The transmitter was on a motorized rotational stage, turning an estimated +/- 45 degrees to steer the beam. If that's the case, I do not understand why they bother with individual elements and a phased array - simply get a focused bowl arrangement and steer mechanically. The CES floor show demo seemed to show phased array operation, so perhaps there's a very limited steering angle and gross motions need mechanical steering?

There were items taped to the wall, on the door etc to show charging of items like "smart locks", however the device itself never charged, it was always an LED that lit up to indicate power was being delivered.

Those who held the next generation transducers seemed to think them roughly the same lateral dimensions as the Muratas, perhaps a bit thinner, but nowhere close to the "4x smaller area, 100x thinner" listed in the Oct 17 fundraising. They did say that the demo was being done with COTS devices.

Generally the view was that the presentation materials were not particularly professional. Given what they showed, it seems they booked a slot at CES prematurely, I have to think this hurt more than helped - but maybe I'm just a dumb engineer.
coppice:

--- Quote from: PaulReynolds on January 24, 2019, 08:07:44 am ---The transmitter was on a motorized rotational stage, turning an estimated +/- 45 degrees to steer the beam. If that's the case, I do not understand why they bother with individual elements and a phased array - simply get a focused bowl arrangement and steer mechanically. The CES floor show demo seemed to show phased array operation, so perhaps there's a very limited steering angle and gross motions need mechanical steering?

--- End quote ---
Wouldn't they still need an electronically steered beam to get the responsiveness they need? The target can be quite agile.
Howardlong:

--- Quote from: PaulReynolds on January 21, 2019, 02:06:51 am ---Apparently Ossia are claiming 2 to 3 Watts delivered to a device battery within a car interior (re-asked and reconfirmed).

--- End quote ---

Tom's Guide, the well-known encyclopedia of puff pieces, is claiming 3 to 4 watts at a distance of 2m.

If that gets past the regulatory authorities I'm a banana.

They claimed a 1W regulatory compliance here with no distance specified, but without seeing the tests themselves, I'd take that claim with a large spade load of salt.

Edit: from the Tom's Guide infomercial:


--- Quote ---Ossia says it plans to work with Spigen to deliver a Cota-enabled phone case for 5.8GHz "by or before 2020."

--- End quote ---

Always 18 months away.
Marco:

--- Quote from: sdpkom on January 22, 2019, 07:06:14 am ---its the famous engineering situation - pick any two

--- End quote ---

There's also the Disney solution ... make the entire room a Faraday cage and use a big high intensity but low frequency emitter.
sdpkom:
The ossia receiver, is supposed to be a cota chip (5mmX5mm) that's supposed to deliver up to 4W of power
https://powerpulse.net/ossia-unveils-next-gen-reference-design-kit-for-wireless-power/

Looking at the size of this sleeve, it at least doubles the volume of the iPhone it's housing.

The sleeve includes the chip, a flat antenna probably, a few LED, a LED driver and a controller to manage it all, all can easily fit into a 2cm^2 PCB and does not justify the hefty thickness....

The rest of the volume is probably a 10-20Wh LiPo battery (judging by the volume allocated to it).

Question 1:
  Why would they demonstrate it with such a big battery ? a thinner case would be much nicer.
Answer 1:
 A thinner case would need to be charged mid day in CES, in order to keep faking charging.

Question 2:
  Why did no one ask the super easy question - if the case is as big as a 15Wh battery case, why does it need two very big transmitters to keep it going all day?
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