Wireless LAN | WLAN | Wi-Fi
Manufacturers & Services
By 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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Suffolk, United Kingdom
Antennas Ltd trading as
Cobham Antenna Systems, Microwave Antennas
The same people, the same location, the same
|Specialising in the design and development of high gain, printed circuit arrays, ultra wide-band
directional antennas, multi-octave bicones and high gain collinear omni-directional antennas.
Large catalogue of antenna designs. Specialist development projects from 250 MHz to 40 GHz.
Communication industry awareness and expertise in antenna physics ensure customer satisfaction.
- Product & Service Offerings -
• Cellular • PMR
• Tetra Broadcast • WiMAX/LTE RFID
DEFENCE: • Tactical Comms
•Link16 Radar • Missile
• IED CM Unmanned Systems
• Ground Based Mobile Satcoms
• EW • COFDM • Bodyworn
• Covert •Tracking Surveillance
• Counter Terror Cellular DAS
AirDefense, Inc | airdefense.net
| 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
| Warren, NJ
802.16 power amplifiers, WLAN 802.11 front-end integrated circuits, WLAN 802.11 power amplifiers.
Berkeley Varitronics Systems | bvsystems.com
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 | broadcom.com
| Irvine, CA
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
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
| 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
| Portsmouth, NH
and WPA solutions from Meetinghouse help organizations secure their wired and wireless LANs with interoperable
Layer 2 standards-based software.
(OMP) | orbanmicrowave.com
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.
|Parsec Technologies' broadband LNAs have been designed for flexibility, highest linearity,
low power consumption, and small size using advanced GaAs processes. Cutting edge designs allow
our customers to improve reception in the presence of interference with lower noise, higher
cascadable gain, and higher IP3 by having adjustable current, low power consumption, and internal/external
GNSS LNA for GNSS/GPS applications.
Frequency: 1500-1610 MHz,
Gain: 15 dB,
NF: 1.5 dB, IP3: +16.5 dBm, 1.8 V
@ 5 mA
HDTV LNA for VHF/UHF Antenna, TVWS,
HDTV Receiver, CMTS Equipment,
and Cable Modem apps. Frequency: 50-1000 MHz,
Gain: 18.5 dB, NF: 1.35 dB, IP3: +34 dBm
M2M LNA for Mobile TV, DAB, RKE, AMR,
Cellular, GPS, LTE, ZigBee, SDARS,
and ISM applications. Frequency: 50-2100 MHz,
Gain: 23.5 dB, NF: 0.75 dB, IP3: +22.9 dBm
|• PT683-3 LTE Amplifier for LTE applications.
|Parsec is now offering
Services to help customers efficiently and effectively imbed ultra small footprint,
high radiation efficiency GPS/GNSS and M2M active antenna modules into their products.
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
| Sunnyvale, CA
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
Coaxial connector, cable assembly & RF passive components
Sagrad | sagrad.com
| West Melbourne, FL
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.
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
VisiWave | visiwave.com
| Kalamazoo, MIbr>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
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.