How Does a WiFi Signal Amplifier Work
For these and other reasons, end users are often forced to take matters into their own hands and turn to one of the several available solutions for boosting WiFi signal. Among these solutions are WiFi amplifiers, clever devices that offer significant improvement in operating range and performance of wireless networks.
A major factor that influences how far a router can transmit a strong WiFi signal is its transmission power. More specifically, equivalent isotropically radiated power (EIRP). Most routers with an advanced settings menu give users the option to adjust the power in percentages, but it’s never possible to go above 100 percent. Lowering the power is useful for security purposes and for avoiding needless interference with nearby wireless networks. Simply put, the lower the power is, the shorter distance will the wireless signal travel.
The reason why it’s impossible to go above 100 percent is that the maximum allowed transmission power is regulated, with each country having a certain maximum power for given WiFi channels. For example, the maximum allowed transmission power for Austria is 100 mW. Canadiens running WiFi networks on channels 149, 153, 157, 161 can set the transmission power up to 4000 mW, while people living in the United States are limited to 1000 mW on all channels.
With a WiFi signal amplifier, it’s, however, possible to increase the transmission power above the allowed value. Legal considerations aside, increasing the transmission power is an extremely effective way how to increase the transmission range of a router, regardless of where the router is located.
All WiFi signal amplifiers work and look mostly the same. The typical amplifier looks like an inconspicuous gray box with three connectors: two antenna connectors and one connector for power. Using one of the two antenna connectors, a user connects the amplifier to a router. The other connector connects the amplifier to an external antenna. Finally, power is delivered to the amplifier via a power supply. All the amplifier does is electronically boosting the wireless signal coming from the router and outputting it to the connected antenna. In a sense, it works just like a megaphone. Wireless amplifiers are completely autonomous, meaning they don’t require a WiFi amplifier app for configuration—once an amplifier is installed, it just works.