ARLA/CLUSTER: Nova Antena para telemóveis nas áreas rurais

[João Gonçalves Costa]

[http://bloximages.chicago2.vip.townnews.com/bozemandailychronicle.com/content/tncms/assets/editorial/5/4d/2af/54d2af60-7031-11df-8850-001cc4c002e0.preview-300.jpg?_dc=1275694302]<http://www.bozemandailychronicle.com/news/article_5d34096a-7031-11df-8eca-001cc4c002e0.html?mode=image&photo=1>
Aaron Traxinger holds an antenna developed
by MSU researchers in collaboration with
Advanced Acoustic Concepts, Inc., of Bozeman.
The antenna is a cylinder that's about three
inches in diameter and a foot long.
(Credit: MSU photo by Kelly Gorham)
New cell phone antenna

Emergency workers in rugged, rural areas may never lose a cell phone call again thanks to a new antenna developed by Montana State University researchers in collaboration with Advanced Acoustic Concepts, Inc.

Dropped calls when using a cell phone in rough terrain is a common problem that can be addressed by the MSU antenna, according to the developers.

The MSU antenna is considered a "smart" or "adaptive array" antenna because it uses a computer chip to automatically aim the message transmission beam in the right direction, chooses the most appropriate signal strength, optimizes the strength of transmitted beams and adapts to the environment.

The automatic control allows users to communicate in rugged terrain while on the move. Unlike normal antennas, which broadcast in all directions simultaneously, smart antennas maintain a direct signal between individuals users, which could mean fewer dropped calls and the ability to move more data, such as streaming video.

With help from student teams, the researchers built and successfully tested a prototype under mobile use in rugged Montana terrain. First responders in Eastern Montana, firefighters in the wilderness, telecommunications providers in remote areas and soldiers in Afghanistan are among those who might use the MSU technology that's available now for licensing.

Unlike most commercial smart antennas that have a limited range of 120 degrees or less, the MSU antenna can rapidly process signals in a 360-degree range.

The MSU antenna can lock onto one signal and tune out unwanted signals, giving users a stronger, clearer, more reliable signal than they'd have otherwise. The MSU antenna can track and hold a signal even when the sender or receiver is moving. It is also capable of high bandwidth transmissions such as sending live video. Users might want to optimize communications by integrating the antenna with other antennas to form a "meshed" network in a back-country environment for emergency response or military operations.

The MSU antenna is a cylinder about three inches in diameter and a foot long. It weighs less than eight pounds.

"We designed this intentionally to be small. It could be used in many applications where having something small and light is very desirable," said Richard Wolff, Gilhousen Telecommunications Chair in MSU's Department of Electrical and Computer Engineering.

See the full Montana State University Press Release at
http://www.montana.edu/cpa/news/nwview.php?article=8548

Fonte: George Boorer ZL3PN for spotting this item
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