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Equipment used in Illustration
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Booster Kit
(Works with equipment used in
illustration above)
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FCC Max Power Limitations
(When using a directional point to point application)
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Amp power
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Directional Antenna
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Total watts
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30dBm or 1W
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+ 6dBi
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= 3.98
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29dBm or 800mW
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+ 9dBi
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= 6.35
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28dBm or 630mW
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+ 12dBi
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= 10.14
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27dBm or 500mW
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+ 15dBi
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= 15.81
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26dBm or 398mW
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+ 18dBi
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= 25.23
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25dBm or 316mW
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+ 21dBi
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= 40.28
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24dBm or 250mW
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+ 24dBi
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= 62.79
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23dBm or 200mW
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+ 27dBi
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= 100.2
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A WiFi Bridge can link your network to another network so that resources like Internet can be shared. Bridging devices
work together in pairs so you will need two units. One unit is placed at each network. When a WiFi connection is
established between both bridging units then the two networks become one.
A WiFi bridge is different from a WiFi router because it is able to
connect two networks using WiFi. A normal WiFi router must connect to other networks using an Ethernet cable.
Setup
It is best to initially setup both bridging units in the same room before relocating them to their final location.
Run the setup CD on a nearby computer and follow the instructions. Once both bridges are communicating with each
other then you can continue by placing each item in its final location.
Most WiFi bridging devices come pre-installed with a small antenna that can be upgraded to a
larger antenna for extended long range WiFi. When using a bridge it is best to mount your antenna outdoors where line
of sight can be achieved without obstructions. In this case you may need to extend low-loss coaxial cable between the
antenna jack on the bridge and the outdoor antenna.
Boosting Power
If all your equipment is setup and aligned properly and you are still not getting connected then you
may need to boost the power. This requires another piece of equipment called a WiFi Signal Booster.
This WiFi Signal Booster
has two coaxial connectors so it can be placed in-line with the antenna. Connect the "Input" jack on the signal booster
to the antenna jack on the bridge. Next connect the "Antenna" jack on the signal booster to the coaxial cable
that leads to your outdoor antenna. If you're using the
linked signal booster above with the equipment used in this illustration, then you will
also need a
special connector fitting
along with a
special pigtail. For even more power add a WiFi signal booster to both bridges.
FCC Power Output Rules
Unfortunately there are power restrictions (laws) when using WiFi that if exceeded could land you in jail. The FCC limits
your total power output using a sliding scale. The scale starts at 30dBm of amplification power while using a 6dBi
directional antenna. Then for every 1dBm you drop in amplification power you can increase the power of your
directional antenna by 3dBi.
Using a larger point-to-point antenna, your beam pattern will cover less area and cause less interference for others.
This is why the FCC allows this sliding scale.
Other Solutions
There is now an easier and more affective way to create a WiFi Bridge by getting the
Extended Long Range WiFi Bridge System from C. Crane.
Also check out the new
CC Vector WiFi Repeater Systems. It latches on to any distant WiFi hotspot and repeats the signal in your
home, boat, or RV. Works great for boosting the WiFi signal on a Android or Apple cell phone or tablet.
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