Communion Of Dreams


Broadcast power.

Very interesting technology breakthrough: the use of metamaterials to harvest microwave energy and convert it to DC (direct current), with an efficiency on par with the best solar panels.  From EurekAlert:

With additional modifications, the researchers said the power-harvesting metamaterial could potentially be built into a cell phone, allowing the phone to recharge wirelessly while not in use. This feature could, in principle, allow people living in locations without ready access to a conventional power outlet to harvest energy from a nearby cell phone tower instead.

“Our work demonstrates a simple and inexpensive approach to electromagnetic power harvesting,” said Cummer. “The beauty of the design is that the basic building blocks are self-contained and additive. One can simply assemble more blocks to increase the scavenged power.”

For example, a series of power-harvesting blocks could be assembled to capture the signal from a known set of satellites passing overhead, the researchers explained. The small amount of energy generated from these signals might power a sensor network in a remote location such as a mountaintop or desert, allowing data collection for a long-term study that takes infrequent measurements.

This is a fundamental breakthrough, and one which will have a lot of applications/implications far beyond just those mentioned above. Consider what you could do with even our current electronics technology if you didn’t need to have access to charge batteries/capacitors. Already many devices are charged through induction, though that has a relatively short-range effect, and the magnetic fields used create their own problems (and are relatively inefficient).

Combine this with RFID technology as well as nano-sized processors/memory, and you quickly get to the point where ubiquitous computing becomes not just possible but economically viable. Fascinating.

The full pdf (just 4 pages) of the Applied Physics Letters article can be found here.

Jim Downey

Advertisements

Leave a Comment so far
Leave a comment



Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s



%d bloggers like this: