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Copyright: 1996 - 2024 Webmaster:
Kirt Blattenberger,
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
AirplanesAndRockets.com
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Sub-Header - RF Cafe
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Wireless LAN (WLAN) Band Specifications |

Source: Strategy Analytics Inc. (chart by RF Cafe)
WLAN Spectral Masks (802.11a/b/g)
Wireless Spectrum Chart, by QRC Technologies
Access Method |
CSMA/CA, SSMA |
CSMA/CA |
TDMA/EY-NPMA |
TDMA/TDD |
Modulation |
CCK (8 complex chip spreading) |
64 QAM-OFDM 16 QAM-OFDM QPSK-OFDM BPSK-OFDM |
GMSK/FSK |
64 QAM-OFDM 16 QAM-OFDM QPSK-OFDM BPSK-OFDM |
Data Rate (Mbits/s) |
1, 2, 5.5 and 11 |
6, 9, 12, 18, 24, 36, 48 and 54 |
23 (HBR) 1.4 (LBR) |
6, 9, 12, 18, 27, 36, 48 and 54 |
Frequency Band (MHz) |
2,400 to 2,483.5 |
5,150 to 5,250 5,250 to 5,350 5,725 to 5,825 |
5,150 to 5,300 limited in some countries to 5,150 to 5,250 |
5 GHz bands currently under study |
Channelization |
25/30 MHz spacing 3 channels |
20 MHz channel spacing |
23.5294 MHz (HBR) 3 channels in 100 MHz and 5 channels in 150 MHz 1.4 MHz (LBR) |
20 MHz channel spacing 4 channels in 100 MHz |
Transmit Power |
1,000 mW EIRP 100 mW EIRP 10 mW/MHz EIRP |
5,150 to 5,250 10 mW/MHz 200 mW EIRP in 20 MHz channel
5,250 to 5,350 1 W EIRP
5,725 to 5,825 4 W EIRP |
Three different classes of power levels depending on country administration
1 W EIRP 100 mW EIRP 10 mW EIRP |
Power limits currently under study |
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