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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

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 tying 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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Wireless LAN (WLAN) Band Specifications

Cell phone market share 2001 pie chart - RF Cafe

 

Source: Strategy Analytics Inc. (chart by RF Cafe)

 

WLAN Spectral Masks (802.11a/b/g)

Wireless Spectrum Chart, by QRC Technologies

 

 

 

Network

Standard

IEEE 802.11b IEEE 802.11a ETSI BRAN

HiperLAN1

ETSI BRAN

HiperLAN2

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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