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Amplifer 802.11b/g 100/200/500mw Wireless

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 Product Description

This unit is a bi-directional WiFi signal booster (amplifier). It boosts both the transmit and receive signals. It is ideal for boosting the range, or increasing the speed/reliabilty of a WiFi network.


The image shows the typical real world performance.

The Transmit Netstumbler plot has three sections. The increase in signal is obvious.

  • The AP (60 mW) by itself
  • AP plus SB-2200g in 200 mW mode
  • AP plus SB-2200g in 500 mW mode

The Receive plot shows the signal from a remote AP with and without the SB-2200g in use at the receiving end.

Typical Setup

This picture shows the typical setup for an SB-2200g. It goes in-line between the antenna and the AP.

Keeping it Legal

While WiFi signals operate in an unlicensed band, most governments place strict limits on maximum effective radiated power (EIRP) that can be used. In Australia, the ACMA defines this limit. For 802.11b/g it is 4000 mW (36 dBm) including the antenna gain. It is easy to exceed the 4000 mW limit with just a 200 mW signal when boosted by a suitable antenna. It is important to note that the SB-2200g is only approved for sale in Australia under the C-Tick system subject to these limitations:

  • It is used with an access point with an output power no greater than 60 mW (18 dBm).
  • It is used with an antenna that limits the maximum EIRP to 36 dBm.

Freenet Antennas will not sell you a system with this booster without confirming that the system you plan to use it with will not exceed the ACMA limit. The questions we will ask are:

  • AP output power (dBm or mW)
  • Length and type of cable between Amplifier and Antenna.
  • Antenna gain (dBi)

For example.

  • AP Output = 18 mW/60 mW
  • Antenna cable = 5m of CFD200 with two connectors (3 dB loss)
  • Max. allowable antenna gain = 12 dBi


Standards IEEE 802.11g/b (WiFi)
Frequency Range 2.4GHz ~ 2.5GHz
Connector 2 x rpSMAf (male center pin)
Output Power Switch Selectable
500/200/100 mW
27/23/20 dBm
Transmitter Input Power 8dBm ~ 18dBm (Max.)
Receive Input Power -16dBm (Max.)
Receiver Gain 12dB typical
Temperature 0-55ºC
Humidity 10~95% (Non-Condensing)
Certification ANSI:

FCC EMC: 47 CFR Part 15 Subpart B
FCC EMR: 47 CFR Part 15 Subpart C 15.247
with 18 dBm AP/Transmitter and supplied 2 dBi antenna

only in a system with 18 dBm (max.) AP/Transmitter and antenna limiting EIRP to 36 dBm
Shipping Weight 0.6 kg
Size 25 x 58 x 88 mm (H x W x D booster only)
Antenna Cable Supplied, rpSMAm to rpSMAm, 790 mm
Antenna Supplied, rpSMA 2dBi
DC Power 12V regulated, 1.25A
NOT suitable for Power over Ethernet (POE). Power supply requires 200-240VAC, 50/60 Hz

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