most accounts, Wireless Local Area Network (WLAN, Wi-fi) 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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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 | anadigics.com
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 | bvsystems.com
732-548-3737 | Metuchen, NJ
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 | broadcom.com
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 | cisco.com
800-553-6387 | San Jose, CA
Mobile wireless, wireless integrated
switches and routers, wireless IP telephony, LAN Access, LAN controllers, network management, security servers.
CWNP Program | cwnp.com
770-433-9339 | Smyrna, GA
CWNP is the industry standard for vendor
neutral, enterprise wireless LAN certifications, offering four levels of enterprise WLAN certification, from novice
to expert. Our focus is to educate IT professionals in the technology behind all enterprise WLAN products, enabling
the ability for these professionals to enter an enterprise and manage its wireless LAN infrastructure regardless
of the vendor solution utilized.
Meetinghouse | mtghouse.com
603-430-7710 | Portsmouth, NH
802.1X and WPA solutions from
Meetinghouse help organizations secure their wired and wireless LANs with interoperable Layer 2 standards-based
Orban Microwave (OMP) | orbanmicrowave.com
915-590-0825 | El Paso, TX
power amplifiers, low noise amplifiers, local oscillators, patch antennas, parabolic antennas & antenna arrays
for WLAN, GPS, cellular, point to point, satellite and other applications.
Parsec Technologies | parsec-t.com
972-804-4600 | Plano, TX
Amplifier chips for various
wireless and mobile antenna markets. HDTV, M2M, LTE, GPS, WiFi, CATV / broadband, VHF / UHF, digital audio
broadcast (DAB), macro cell & small cell, cognitive radio, software defined radio (SDR), & TV whitespace.
Proxim Corp | proxim.com
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 & Connector Technology | rf-ct.com
+82 505 274 0002 | Suwon, Kyounggi ,Korea
cable assembly & RF passive components
Sagrad | sagrad.com
800-779-7139 | West Melbourne, FL
Wireless audio, 802.11, IC design,
WiFi modules, prototype builds, engineering services. Sagrad is actively seeking contracts with the U.S. government
and employs only US citizens.
Ubiquiti Networks | ubnt.com
408-942-3085 | Milpitas, CA
Broadband wireless solutions
for WISP, WiFi, WLAN, and other applications in the 900 MHz and 2.4/5 GHz ISM bands. Base stations, PC cards, embedded
systems (plug-in cards), AirView™ spectrum analyzers, Bullet™ antenna-mounted transponders.
VisiWave | visiwave.com
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 Shop | wirelesslan-shop.de
Wireless Projects | wirelessprojects.ie
+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.