Antena externa, ou melhor antena para os dois lados.
Trecho retirado do Wireless Hacks - OReilly 2005.
"Improve the range of your laptop with an add-on antenna.
Possibly the most frequently asked question at any wireless user's group is
"How can I make it go farther?" The single most effective
means for increasing your range is to add antenna gain. Most people think of
adding an external antenna to their access point, or
replacing the existing antenna with one of higher gain. While this can help all
of your wireless clients, most people ignore the need for a
good antenna on the client side. While some laptops (such as the Apple iBook
and Sony Vaio, to name two) ship with antennas
embedded in the laptop screen, many people are using add-on wireless cards.
These cards leave an annoying little lump sticking out of the side of the
laptop, parallel with the keyboard, and very close to the tabletop.
This is the laptop's only antenna, and in many cases, you can greatly improve
performance by adding an external antenna.
Not all wireless cards accept external antennas. Some have removable antennas,
allowing removal of the little plastic lump, and will
accommodate two external antennas using pigtail adapters [Appendix A]. Others
have no internal antenna at all and work only with an
external antenna.
Here's an incomplete list of PCMCIA wireless cards that accept external
antennas:
Lucent/Orinoco/Proxim Gold or Silver 802.11b
Senao/Engenius NL2511-EXT2 802.11b
Cisco Aironet 350 802.11b
Proxim Orinoco 11b/g 802.11g
Buffalo AirStation 802.11g
Wistron NeWeb CB9-GP 802.11a/b/g
Adding an external antenna to your laptop has two important effects. First,
external antennas have much higher gain than the tiny dipole
antennas contained in most wireless cards. Second, and possibly even more
important, an external antenna brings the signal away from
the desktop and the body of the computer, giving it more visibility, and making
it easier to adjust the antenna to find the best possible
signal.
While adding a proper external antenna will almost definitely increase your
range, not all antennas are especially convenient. Here are
three popular antennas that are quite small and unobtrusive.(.....)
> Pessoal,
>
> Em algumas ocasiões já tive dificuldades com o sinal do roteador
> wireless DI-524 em apartamentos normais, às vezes com uma distância de
> apenas um corredor entre o roteador e o receptor do outro computador. Já
> percebi que aquela antena maior, de 5dB, não melhora absolutamente nada
> o sofrível sinal deste aparelho.
>
> Nos próximos dias vou instalar uma rede wireless num apartamento de
> tamanho médio, mas haverá novamente um aterrorizante corredor e portas
> entre as duas máquinas.
>
> A pergunta é: em que roteador wireless devo apostar para que o sinal
> tenha mais chances de ficar bom?
>
> [ ],
> e.
>
>
>
> Links do Yahoo! Grupos
>
>
>
>
>
>
>
Links do Yahoo! Grupos
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