Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old December 31st 10, 09:19 AM posted to rec.sport.cricket,sci.physics,talk.politics.misc,sci.med,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Sep 2007
Posts: 135
Default Wireless at the speed of plasma

On Thu, 30 Dec 2010 19:15:19 -0800, "NSA TORTURE TECHNOLOGY, NEWS and
RESEARCH" wrote:

http://www.newscientist.com/article/...of-plasma.html

Wireless at the speed of plasma
a.. 13 December 2010 by David Hambling
a.. Magazine issue 2790

Antennas that use plasma to focus beams of radio waves could bring us
superfast wireless networks

BEFORE you leave for work in the morning, your smartphone downloads the
latest episode of a television series. Your drive to work is easy in spite
of fog, thanks to in-car radar and the intelligent transport software that
automatically guides you around traffic jams, allowing you to arrive in time
for a presentation in which high-definition video is streamed flawlessly to
your tablet computer in real time.

This vision of the future may not be far off, thanks to a new type of
antenna that makes use of plasma consisting of only electrons. It could
revolutionise high-speed wireless communications, miniature radar and even
energy weapons.

Existing directional antennas that transmit high-frequency radio waves
require expensive materials or precise manufacturing. But the new antenna,
called Plasma Silicon Antenna, or PSiAN, relies on existing low-cost
manufacturing techniques developed for silicon chips. It has been developed
by Plasma Antennas of Winchester, UK.

PSiAN consists of thousands of diodes on a silicon chip. When activated,
each diode generates a cloud of electrons - the plasma - about 0.1
millimetres across. At a high enough electron density, each cloud reflects
high-frequency radio waves like a mirror. By selectively activating diodes,
the shape of the reflecting area can be changed to focus and steer a beam of
radio waves. This "beam-forming" capability makes the antennas crucial to
ultrafast wireless applications, because they can focus a stream of
high-frequency radio waves that would quickly dissipate using normal
antennas.

"Beam-forming antennas are the key for enabling next-generation,
high-data-rate indoor wireless applications," says Anmol Sheth, at Intel
Labs in Seattle. "Without beam-forming antennas it would be difficult to
scale to the levels of density of wireless devices we expect to have in
future homes."

There are two types of plasma antenna: semiconductor or solid-state
antennas, such as PSiAN, and gas antennas. Both could fit the bill, but
solid-state antennas are favoured as they are more compact and have no
moving parts.

That makes them attractive for use in a new generation of ultrafast Wi-Fi,
known as Wi-Gig. Existing Wi-Fi tops out at 54 megabits of data per second,
whereas the Wi-Gig standard is expected to go up to between 1 and 7 gigabits
per second - fast enough to download a television programme in seconds.
Wi-Gig requires higher radio wave frequencies, though: 60 gigahertz rather
than the 2.4 GHz used by Wi-Fi. Signals at these frequencies disperse
rapidly unless they are tightly focused, which is where PSiAN comes in.

Ian Russell, business development director at Plasma Antennas, says that
PSiAN is small enough to fit inside a cellphone. "Higher frequencies mean
shorter wavelengths and hence smaller antennas," he says. "The antenna
actually becomes cheaper at the smaller scales because you need less
silicon."

The antennas shouldn't raise any health issues, as they are covered by
existing safety standards. The narrow beam means there is less "overspill"
of radiation than with existing omnidirectional antennas.

As well as speeding up Wi-Fi, plasma antennas could also allow cars to come
with low-cost miniature radar systems to help drivers avoid collisions.
Their millimetre wavelengths could be used to "see" through fog or rain, and
another set of antennas could listen for real-time updates on traffic and
road conditions.

The US military is also interested in solid-state plasma antennas, for use
in a more advanced version of their so-called "pain beam", a weapon called
the Active Denial System. The ADS heats a person's skin painfully with a
beam of 64 GHz radio waves. But the current design involves a 2-metre-wide,
mechanically steered antenna mounted on a large truck. Switching to a small,
lightweight plasma antenna would allow multiple narrow beams to selectively
target several individuals at once.

Ted Anderson of Haleakala R&D, based in Brookfield, Massachusetts, has been
involved in the development of gas plasma antennas for many years. He points
out that although the solid-state version is compact, it is limited to high
frequencies, making certain applications tricky. For instance, indoor Wi-Gig
routers operating at 60 GHz wouldn't be able to penetrate walls. The signal
would instead have to be reflected off surfaces to reach every room in a
house.

"Semiconductor plasma antennas will work at only high frequencies, between 1
GHz and 100 GHz," says Anderson. "Theoretically, we see no upper or lower
bound to ionised gas antennas in the radio frequency spectrum."

Russell says that PSiAN could be commercially available within two years. At
present, getting movies and high-quality images on and off our smartphones
almost certainly means hooking them into a computer. But as the demand for
such content increases, the only way to break the wire is going to be an
ultrafast wireless connection. When it comes, it may very well be in the
form of plasma.



Snake oil unless they can produce 1 (one) working example,
which they don't.

All they have is a grey box size of a small car.


w.
  #2   Report Post  
Old January 2nd 11, 04:31 AM posted to rec.sport.cricket,sci.physics,talk.politics.misc,sci.med,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jan 2011
Posts: 1
Default Wireless at the speed of plasma


"Helmut Wabnig" [email protected] --- -. DOTat wrote in message
...
On Thu, 30 Dec 2010 19:15:19 -0800, "NSA TORTURE TECHNOLOGY, NEWS and
RESEARCH" wrote:


Existing directional antennas that transmit high-frequency radio waves
require expensive materials or precise manufacturing


WRONG - cheap lands on PCboard.

This "beam-forming" capability makes the antennas crucial to
ultrafast wireless applications, because they can focus a stream of
high-frequency radio waves that would quickly dissipate using normal
antennas.


WRONG - no way it can track multi-path




"Beam-forming antennas are the key for enabling next-generation,
high-data-rate indoor wireless applications," says Anmol Sheth, at Intel
Labs in Seattle. "Without beam-forming antennas it would be difficult to
scale to the levels of density of wireless devices we expect to have in
future homes."


WRONG - try using another BAND, or encoding.



There are two types of plasma antenna: semiconductor or solid-state
antennas, such as PSiAN, and gas antennas. Both could fit the bill, but
solid-state antennas are favoured as they are more compact and have no
moving parts.


SO WHAT ? All other antennas have NO MOVING PARTS.

Compact = Lossy and ineffecient.


That makes them attractive for use in a new generation of ultrafast Wi-Fi,
known as Wi-Gig. Existing Wi-Fi tops out at 54 megabits of data per
second,
whereas the Wi-Gig standard is expected to go up to between 1 and 7
gigabits
per second - fast enough to download a television programme in seconds.


WRONG - how far can you transmit ? a few INCHES ???


Wi-Gig requires higher radio wave frequencies, though: 60 gigahertz rather
than the 2.4 GHz used by Wi-Fi. Signals at these frequencies disperse
rapidly unless they are tightly focused, which is where PSiAN comes in.


Too Lossy. Only reason 60 GHz is FCC has an open band there.



Ian Russell, business development director at Plasma Antennas, says that
PSiAN is small enough to fit inside a cellphone. "Higher frequencies mean
shorter wavelengths and hence smaller antennas," he says. "The antenna
actually becomes cheaper at the smaller scales because you need less
silicon."


SO WHAT ? It cant transmit more than a centimeter, SI TOO LOSSY
-20 db antenna gain



The antennas shouldn't raise any health issues, as they are covered by
existing safety standards.


WRONG - you have that BASS ACKWARDS



The narrow beam means there is less "overspill"
of radiation than with existing omnidirectional antennas.


WRONG ! - How is "overspill" on an omni bad ????



"Semiconductor plasma antennas will work at only high frequencies, between
1
GHz and 100 GHz," says Anderson. "Theoretically, we see no upper or lower
bound to ionised gas antennas in the radio frequency spectrum."


WRONG - [also 100GHz you says is upper limit]



Russell says that PSiAN could be commercially available within two years.
At
present, getting movies and high-quality images on and off our smartphones
almost certainly means hooking them into a computer. But as the demand for
such content increases, the only way to break the wire is going to be an
ultrafast wireless connection. When it comes, it may very well be in the
form of plasma.


WRONG - Plasma takes time to establish, UNLIKE Todays proven cheap reliable
EXISTING antenna technology(s)





Snake oil unless they can produce 1 (one) working example,
which they don't.

All they have is a grey box size of a small car.


w.



  #3   Report Post  
Old January 2nd 11, 04:39 AM posted to rec.sport.cricket,sci.physics,talk.politics.misc,sci.med,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jan 2011
Posts: 1
Default Wireless at the speed of plasma


"John" wrote in message
...

"Helmut Wabnig" [email protected] --- -. DOTat wrote in message
...
On Thu, 30 Dec 2010 19:15:19 -0800, "NSA TORTURE TECHNOLOGY, NEWS and
RESEARCH" wrote:


Existing directional antennas that transmit high-frequency radio waves
require expensive materials or precise manufacturing


WRONG - cheap lands on PCboard.

This "beam-forming" capability makes the antennas crucial to
ultrafast wireless applications, because they can focus a stream of
high-frequency radio waves that would quickly dissipate using normal
antennas.


WRONG - no way it can track multi-path




"Beam-forming antennas are the key for enabling next-generation,
high-data-rate indoor wireless applications," says Anmol Sheth, at Intel
Labs in Seattle. "Without beam-forming antennas it would be difficult to
scale to the levels of density of wireless devices we expect to have in
future homes."


WRONG - try using another BAND, or encoding.



There are two types of plasma antenna: semiconductor or solid-state
antennas, such as PSiAN, and gas antennas. Both could fit the bill, but
solid-state antennas are favoured as they are more compact and have no
moving parts.


SO WHAT ? All other antennas have NO MOVING PARTS.

Compact = Lossy and ineffecient.


That makes them attractive for use in a new generation of ultrafast
Wi-Fi,
known as Wi-Gig. Existing Wi-Fi tops out at 54 megabits of data per
second,
whereas the Wi-Gig standard is expected to go up to between 1 and 7
gigabits
per second - fast enough to download a television programme in seconds.


WRONG - how far can you transmit ? a few INCHES ???


Wi-Gig requires higher radio wave frequencies, though: 60 gigahertz
rather
than the 2.4 GHz used by Wi-Fi. Signals at these frequencies disperse
rapidly unless they are tightly focused, which is where PSiAN comes in.


Too Lossy. Only reason 60 GHz is FCC has an open band there.



Ian Russell, business development director at Plasma Antennas, says that
PSiAN is small enough to fit inside a cellphone. "Higher frequencies mean
shorter wavelengths and hence smaller antennas," he says. "The antenna
actually becomes cheaper at the smaller scales because you need less
silicon."


SO WHAT ? It cant transmit more than a centimeter, SI TOO LOSSY
-20 db antenna gain



The antennas shouldn't raise any health issues, as they are covered by
existing safety standards.


WRONG - you have that BASS ACKWARDS



The narrow beam means there is less "overspill"
of radiation than with existing omnidirectional antennas.


WRONG ! - How is "overspill" on an omni bad ????



"Semiconductor plasma antennas will work at only high frequencies,
between 1
GHz and 100 GHz," says Anderson. "Theoretically, we see no upper or lower
bound to ionised gas antennas in the radio frequency spectrum."


WRONG - [also 100GHz you says is upper limit]



Russell says that PSiAN could be commercially available within two years.
At
present, getting movies and high-quality images on and off our
smartphones
almost certainly means hooking them into a computer. But as the demand
for
such content increases, the only way to break the wire is going to be an
ultrafast wireless connection. When it comes, it may very well be in the
form of plasma.


WRONG - Plasma takes time to establish, UNLIKE Todays proven cheap
reliable EXISTING antenna technology(s)


Well that just sucks! I was relying on plasma technology to accurately
resolve LBW appeals. What a complete *******!!

--
Lawrence
"You can just hang outside in the sun all day tossing a ball around, or you
can sit at your computer and do something that matters." - Eric Cartman - 4
October 2006


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
OT - Speed Test - ignore. - File 1 of 1 - Speed.rtf (01/31) Buck Frobisher Radio Photos 4 November 13th 07 07:40 PM
Long range rural wireless high speed data options... Day Brown Homebrew 19 March 29th 07 02:16 AM


All times are GMT +1. The time now is 11:26 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017