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Graphene Antennas Would Enable Terabit Wireless Downloads

technologyreview.com

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Re: Graphene Antennas Would Enable Terabit Wireless Downloads

#31

Post by lutusp »

trotsky wrote: post #29
lutusp wrote: post #28

Earlier quoted context omitted.

> They are talking about terahertz bands that aren't suitable for distance communication, the ranges are practically measured in centimeters. If this argument had merit, light would be unsuitable for long-distance communication.

Water vapor in these bands is a strong absorber limiting distance in earth's atmosphere to ~10 meters or less. Subtract a good deal for omnidirectional emissions and decent snr.

That's very wavelength-specific, as this graph shows:

http://upload.wikimedia.org/wikipedia/commons/thumb/d/db/Atm...

Water and water vapor has the same effect on the visual part of the spectrum also, but this doesn't reduce people's enthusiasm for it as a potential communications medium.

http://en.wikipedia.org/wiki/Terahertz_radiation

Re: Graphene Antennas Would Enable Terabit Wireless Downloads

#32

Post by solistice »

dhughes wrote: post #20
S_A_P wrote: post #7

Earlier quoted context omitted.

Im sure graphene will be involved with that too ;)

Yes the graphene covered DVD put in a LightScribe DVD drive made a supercapacitor I'm sure that knowledge may someone help in making better batteries (yes I know a capacitor isn't a battery). https://www.sciencemag.org/content/335/6074/1326.ful

But a battery is a capacitor. Well, technically not, but they behave similarily, with the battery storing more energy per cubic centimeter than the capacitor, at the trade off of having a much higher internal resistance. Also I believe he meant data storage, since we have battery technologies which would work for this application, even though more juice is always a juicy prospect.

Re: Graphene Antennas Would Enable Terabit Wireless Downloads

#34

Post by joe_the_user »

hosh wrote: post #13
joe_the_user wrote: post #9

Earlier quoted context omitted.

It may be that kind of rate would wind-up only being useful within a chip or between closely spaced chips.

Yeah. But that is already incredibly useful. When assembling electronic components from a number of suppliers, you would not have to wire them up into a circuit board. You only need to physically put them close to each other and then configure them to talk to each other.

Yes,

I didn't mean to imply this use would be unimportant. This could be huge.

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