RF Cafe - Wireless LAN (WLAN) Websites

Wireless LAN (WLAN) Manufacturers & Services

By most accounts, Wireless Local Area Network (WLAN) first began in 1971 when a wireless computer network was implemented (dubbed the AlohaNet) at the University of Hawaii. In 1990 AT&T, developed WaveLAN, a Direct Sequence Spread-Spectrum (DSSS) that exhibited superior interference immunity. After many versions of designs using discrete components, in 1996, Harris (now Intersil) introduced their PRISM WLAN chipset. Needing a standard to guarantee interoperability, in 1997, the Institute for Electrical and Electronics Engineers published the first specification for IEEE 802.11 - 2.4 GHz, 2 Mbps, using Frequency Hopping (FH) and DSSS. In 1998, the ETSI HomeRF standard was developed for 2.4 GHz, 1.6 Mbps, Wideband Frequency Hopping. 1999 saw the publication of the IEEE 802.11b standard - 2.4 GHz, 11 Mbps, DSSS. With the unlicensed 2.4 GHz ISM band being crowded with existing WLAN, Bluetooth, ZigBee and microwave ovens, and with a need for higher data rates, in 1999 the IEEE released its 802.11a standard, which moved up into the 5 GHz ISM band, and provided 54 Mbps, OFDM data. In 2000, the ETSI HiperLAN2 emerged - 5 GHz, 54 Mbps, OFDM, connection-oriented QoS. Alas, the difficulty with mass-producing high yielding, inexpensive systems at 5 GHz forced, combined with revolutionary modulation methods, drove the IEEE in 2003 to provide a new high data rate “g” spec for operation back in the 2.4 GHz band, but offering the same data rate as the “a” spec 802.11g - 2.4 GHz, 54 Mbps, OFDM, compatible with 802.11b. Now, 802.11n is in the works for 2.4 GHz operation yielding greater than 100 MHz data rates.

WLAN Spectral Masks (802.11a/b/g) Wireless LAN (WLAN) Resources

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	European Antennas Cheveley, Newmarket, UK Tel +44 (0)1638 731888 Fax +44 (0) 1638 731999

European Antennas designs and manufactures high gain, printed circuit arrays, ultra wide-band spirals, multi-octave bicones and collinear omni-directional antennas between 100 MHz and 40 GHz. Antenna development projects are undertaken. Made in the UK and used worldwide in satellite, security, commercial and defense industries for WLAN, RFID, UAV, WiMAX, TETRA, telemetry and cellular applications.

Antenna Applications

• Security, Surveillance and Telemetry

• Wireless LAN • Broadcast

• Fixed Radio Access (FRA)

• Satellite - Fixed, Mobile & Space

• Microcell Mobile Telecommunication

• The Vector Series, WiMAX compatible

• Military and Defence

• RFID • UWB • Telemetry

Products

» Omni – Circular, Vertical and Dual Polar

» Sector (Base Station)

» Directional Flat Panel » Helix

» Broadband/Ultra Wideband Planar Spiral & Omni

Services

• Antenna Development Projects Undertaken

• On-Site Spherical Near Field Test Facility

AirDefense, Inc
877-220-8301 / Alpharetta, GA

Provides protection for all protocols (802.11 a/b/g and Bluetooth), and enterprises and their mobile users. As a key element of wireless LAN security, AirDefense complements wireless VPNs, encryption and authentication.

ANADIGICS
908-791-6000 / Warren, NJ

WiMAX 802.16 power amplifiers, WLAN 802.11 front-end integrated circuits, WLAN 802.11 power amplifiers.

Berkeley Varitronics Systems, Inc
732-548-3737 / Metuchen, NJ

Specializing in CDMA, WISP and WLAN solutions as well as CW and TDMA used for drive-studies, antenna alignment, wardriving, survey sweeping, indoor & outdoor walk-about RF studies.

Broadcom Corp
949-926-5000 / Irvine, CA

Manufacturer of semiconductors for wired and wireless communications including Bluetooth, cable, cellular, consumer electronics, data/telecom networks, DSL, enterprise networking, mobile multimedia, satellite, voice over IP (VoIP), and wireless LAN.

Cisco Systems
800-553-6387 / San Jose, CA

Mobile wireless, wireless integrated switches and routers, wireless IP telephony, LAN Access, LAN controllers, network management, security servers.

EverythingWirelessLAN/FSCi, Inc
702-435-2885 / Las Vegas, NV

Wireless LAN information and products.

Orban Microwave (OMP)
915-590-0825 / El Paso, TX

Frequency converters, power amplifiers, low noise amplifiers, local oscillators, patch antennas, parabolic antennas & antenna arrays for WLAN, GPS, cellular, point to point, satellite and other applications.

RFMD
Greensboro, NC
1-336-664-1233


RFMD is the world’s largest and most diversified RF solutions provider. Our extensive product portfolio includes cellular front ends, cellular transceivers, RF components and SOCs for the cellular handset, cellular base station, WLAN, CATV networking, aerospace, defense, and GPS markets.
Multi-Market	Cellular Systems
♦ Amplifiers Gain Block, LNA, Power Amp, BB/CATV ♦ Signal Sources VCO, PLL ♦ Signal Processing ♦ Passive Devices Coupler, Splitter, Mixer, Isolator, Circulator, Xfmr ♦ Networking Media Converters ♦ Wireless Infrastructure Wireless LAN Broadband/CATV Amps	♦ Transmit Modules EDGE GSM/GPRS ♦ Power Amplifiers ♦ Power Management ♦ Switches EDGE GSM/GPRS WCDMA ♦ RF Systems EDGE GSM/GPRS ♦ Microwave MMICs ♦ pHEMT FETS Bare Die Packaged ♦ ISM Band Transceivers 900 MHz, 2.4 & 5.8 GHz

Search for Sirenza Microdevices and Filtronic products here.

Planet3 Wireless
866-438-2963 / Atlanta, GA

Creator and provider of IT training, courseware, and certification exams for wireless LAN technologies in the computer networking industry.

Proxim Corp
800-229-1630 / Sunnyvale, CA

Wireless networking equipment for Wi-Fi & broadband wireless networks, provides enterprise & service provider customers with wireless solutions for the mobile enterprise, security and surveillance, last mile access, voice and data backhaul, public hot spots, and metropolitan area networks.

RF Magic
858 546-2401 / San Diego, CA

A fabless semiconductor company providing a diversified portfolio of radio frequency (RF) Systems on a Chip integrated circuits (ICs) including broadband wireless access transceivers (BWA), Channel Stacking Switches™ (CSS)™ & Band Translation Switches (BTS), and silicon tuners.

Telnova Technology
0086-755-26947077 / Shenzhen City, China

Product lines servicing the WLAN, CDMA, WCDMA, TD-SCDMA, and GSM bands. Custom solutions available on request.

Active Products: Power amplifiers, selected frequency components, transceiver modules.
Passive Products: Filters, combiners, diplexers, power splitters/dividers, couplers, bridges.
Consumer Electronics: IP camera, digital cameras, iPod accessories.

VisiWave
269-806-9056 / Kalamazoo, MI

Specializing in wireless networking and Internet applications including the VisiWave Site Survey product - lets you visualize the radio waves and demonstrate the effectiveness of your coverage.

Wireless LAN Association

The Wireless Networking Industries information source - Find out how about wireless LAN fundamentals, proper wireless LAN design, and advanced wireless network security.

Wireless LAN resources for Linux

Linux Wireless LAN Howtos, wireless LAN drivers web pages, wireless Linux software on the Internet, security software for your wireless LAN, public wireless Linux networks, wireless LAN hardware (surveys and reviews).

Wireless LAN Shop
Germany

WLAN products.

Wireless Projects
+353 1 878 3377 / Ireland

At Wireless Projects our goal is to bring wireless technologies to the residential and business user. Whether you already have a WLAN installed or are considering installing one, Wireless Projects will help you get the best out of your wireless investment.