80211 Antenna

Wireless LAN Cards (part 1) - pc-level.com

As you know, wireless networks are all around us.Their main purpose is to remove the restrictions imposed by the cables. Due to lower prices, wireless equipment becomes more accessible to people who want to build thier own wireless networks. There are also thousands of public Wi-Fi hotspots around the world, through which you can access the internet wherever you are. However, in order to connect to any wireless network, your compuiter must be equipped with a wireless (WLAN) LAN card. That’s why in this post I will try to describe the different types of WLAN cards, to help you when choosing a wireless card for your computer. There are only few variations of these cards, as they are fairly standard in design among the various vendors.The only real difference may be the chipset used for the 802.11 radio.The major manufacturers of wireless chipsets are Atheros, Broadcom, and TI (Texas Instruments).Most Original Equipment Manufacturers (OEMs) only provide software and drivers for Windows and Mac operating systems in the packaging. However, if you search the Web, you can often find additional drivers for Linux, BSD, and UNIX. As you can see in picture, the antenna (the black part at the top of the card) extends out about an inch from the card.This design offers better reception than if the antenna were buried inside the card.The problem here is that the antenna is now vertically polarized so that the best received signals are those with vertical polarization.To compensate this design flaw, some card manufacturers allow connection of an external antenna in order to increase the performance.

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News

802.11n set for final approval

NetworkWorld.com - Sep 10, 2009

Space Time Block Coding (STBC): This technique can improve transmission redundancy and reliability, especially for 11n clients that use just one antenna.and morenbsp;raquo;

Review: hField Wi-Fire HFWFG200

Wi-Fi Planet - Sep 08, 2009

The Wi-Fire is a USB-based 802.11b/g adapter (alas, the Wi-Fire#39;s Atheros AR5007UG chipset doesn#39;t do 802.11n) paired with a high-gain directional antenna

Xirrus Corrects Aruba Networks Competitive Claims

Reuters - Sep 02, 2009

Xirrus Corrects Aruba Networks#39; Competitive ClaimsThe Wi-Fi Array integrates 4, 8, 12, 16, or 24 802.11abg+n radios coupled to a high-gain directional antenna system into a single device along with an and morenbsp;raquo;

802.11n set for final approval, but the storys not over

iTWire - Sep 09, 2009

802.11n set for final approval, but the story#39;s not overPart of the problem is 802.11n#39;s design calls for between two and four radio chains (antenna, amplifier, receiver, transmitter, etc) in each device,

FirstNews Briefs for September 10, 2009

Wireless Week - Sep 10, 2009

Both feature two antennas and switched transmitter diversity that automatically transmit on the antenna that is receiving the stronger signal. and morenbsp;raquo;

CACE Technologies Releases WiFi Pilot v2 Upgrade

Reuters - Sep 01, 2009

capture-only adapter to an 802.11a/b/g/n capture and injection adapter with two internal and two external MC-Card connectors for optional antenna use. and morenbsp;raquo;

USB Antenna Offers Ten Times Wireless Range for Macs

prMac (press release) - Sep 09, 2009

And the antenna is removeable, so a higher power antenna can be used to upgrade the Transceiver later. This easy-to-use device supports 802.11b/g wireless and morenbsp;raquo;