These links are impressive, but I think this kind of stuff was designed for outer space.
Sent from my Mobile Device. -------- Original message -------- From: Phil Fagan <philfa...@gmail.com> Date: 05/17/2013 4:36 AM (GMT-08:00) To: Eugen Leitl <eu...@leitl.org> Cc: NANOG <nanog@nanog.org> Subject: Re: 40 GBit @ 240 GHz across 1 km LoS Congrats! How does 240Ghz react to atmospheric conditions other than "clear skys?" On May 17, 2013 4:17 AM, "Eugen Leitl" <eu...@leitl.org> wrote: > > Fraunhofer: > > http://www.iaf.fraunhofer.de/de/news-medien/pressemitteilungen/presse-2013-05-16.html > > Google Translate: > > New world record in data transmission by radio > > Press Release 16/05/2013 > > With a Langstreckendemonstrator between two skyscrapers in Karlsruhe, a > distance of over a kilometer could already be bridged. © KIT > > The RF chip is only 4 x 1.5 mm2 large, since electronic components with the > frequency or wavelength scale. > > © Fraunhofer IAF > > Researchers at the Fraunhofer Institute for Applied Solid State Physics IAF > and the Karlsruhe Institute of Technology KIT, it is able to transmit 40 > Gb / > s at 240 GHz and over a distance of one kilometer by radio. With its recent > demonstration they have achieved a new world record and establish for the > first time seamlessly with the capacity of fiber to. Such future radio > links > could close gaps in the provision of broadband Internet by the wireless > links > complement the network of hard to reach areas or in rural areas. > > Digital, mobile and networked - the changing media usage behavior and > require > progressively increasing faster data transfer rates. The expansion of the > fiber network in Germany is lagging behind European standards, such as the > statistics of the industry organization FTTH Council Europe show. To lay > fiber optic lines is expensive and in the case of natural or urban > obstacles > such as rivers and transport hubs difficult. Broadband radio links can help > to overcome such critical points and so promote the expansion of network > infrastructures. In rural areas, they provide a cost effective and flexible > alternative to "Fibre To The Home 'in the expansion of broadband network > dar. > > In the data transmission by radio researchers have set a new world record > for > the first time fully integrated electronic transmitter and receiver are > designed for a frequency of 240 GHz, with which the data transfer rates up > to > 40 Gbit s is / possible. This corresponds to the transfer of a full DVD in > less than a second or 2400 DSL16000 Internet connections. With a > Langstreckendemonstrator a distance of over a kilometer could already be > covered, which was built by the Karlsruhe Institute of Technology between > two > skyscrapers in the "Milli Link" project. "We have managed to develop a > wireless link based on active electronic circuits similar to high data > rates, > such as fiber optic systems, and thus a seamless integration of the radio > link allows" said Professor Ingmar Kallfass, the project initially at > Fraunhofer IAF in looking a shared professorship - supported by IAF and > KIT - > coordinated. Kallfass since 2013 has been working at the University of > Stuttgart, where he continued to lead the project. > > High frequencies allow fast data transfer > > The use of the high frequency range between 200 and 280 GHz not only > enables > the fast transfer of large amounts of data, but also a very compact > technical > structure. Since the dimensions of electronic circuits and antennas > scalable > with frequency or wavelength of the transmitter and receiver chip is 4 x > 1.5 > mm 2 in size. Developed at Fraunhofer IAF semiconductor technology based on > transistors with high electron mobility transistor (HEMT) makes it possible > to use the frequency range between 200 and 280 GHz with active transmitters > and receivers in the form of compact, integrated circuits. In this > frequency > range, the atmosphere has low attenuation values, so that broadband radio > links are possible. "This is our spark gap compared to optical data > transmission systems easier to align and work in bad weather conditions > such > as fog or rain," explains Jochen antes from the KIT. > > So far, radio systems were not yet able to provide the bandwidth of an > optical fiber directly. That could change in the future, as the test shows > construction of the project. Such a powerful system possess the advantage > of > the so-called bit transparency, ie, the signal could be fed directly to a > fiber without energy-intensive recoding in a radio link, transmit and > re-routed at the other end with a glass fiber. The record data from the > test > set are just the beginning. "With an improvement in spectral efficiency > through the use of complex modulation formats or combination of channels, > ie > multiplexing, we can achieve even higher data rates, 'said Antes is safe. > This could be the expansion of broadband network a boost. Maybe Germany > will > in future no longer lies in Europe compared to the rear seats. > > About the project > > The project "Milli Link" is supported by the German Federal Ministry of > Education and Research within the funding program "broadband access next > generation networks" with a total of two million euros. Besides the two > research institutes Fraunhofer IAF and KIT industry partner Siemens AG, > Kathrein KG and Radiometer Physics GmbH are involved in the project. The > aim > of the project is the integration of wireless links or radio links in > broadband optical communication networks in order to provide particular to > rural areas with fast Internet access. Other possible applications include > indoor wireless local area networks (WLAN), wireless personal area networks > (WPAN), and intra-machine and board-to-board communication. > > Milli link Langstreckendemonstrator (print quality) [1.6095294952392578 MB > JPG] Milli link radio frequency chip (print quality) [1.7061738967895508 MB > JPG] > >
