The maximum power allowed with the US is 3 watts. The power required is just enough to get the necessary coverage inside and not negatively affect a service provider's tower and knock other customers off (read "Oscillation Control" below). The output power of an amplifier can be used as a relative measure of power when communicating with your service provider's tower. It's important to note that the higher the gain, the more separation distance required between the inside and outside antenna (Read more in "Oscillation Control" below). So why don't you just purchase the booster with the highest gain? Cost and antenna separation requirements. If one amplifier has 3db gain more than another amplifier, the amplifier with 3db more gain will cover roughly twice the area. The higher the gain, the more area is typically covered. A few key factors on amplifiers are:Īmplifier Gain is used as a relative measure of improved cellular coverage area inside. It takes the outside signal, amplifies it then rebroadcasts the signal through the system's inside antenna. The cellular amplifier is the heart of the repeater system. Dome antennas can also be used as a wall mount antenna for applications requiring wider, shorter coverage. Use when you want a more focused signal radiated a longer distance. Panel Antennas have higher gains and radiate at a smaller angle than the Dome antenna. Panel Antennas are typically used as wall mount antennas. Panel antennas radiate at about 60 degrees downward from the ceiling. Panel antennas can be ceiling mounted on taller ceilings like those found in warehouses. They work best when used in 2 story applications where the antenna mounts between floors. Dual polarity Dome antennas will radiate a small distance upwards as well as downwards. They are directional and radiate at 360 degrees horizontally and about 150 degrees vertically. Typically, Dome Antennas are mounted on ceilings. How you plan to install an inside antenna will have a bearing on which antenna will work best for your installation. Just like outside antennas, inside antennas can be omni-directional or directional. Use a directional if your installation requires the strongest signal and your service provider(s) are located in one direction. And, each service providers tower is in different directions, an omni-directional antenna is best.ĭirectional antennas have higher gains because their radiation pattern focuses in one direction. For instance, use an omni-directional antenna if your repeater system installation goal is to obtain a signal from several service providers (AT&T, Sprint, Verizon, T-Mobile for example). Omni-directional building antennas are best for capturing a signal from several towers in the area. The outside antenna can be omni-directional (capturing a cellular signal from around its whip, or it can also be a directional antenna (sending and receiving the signal in one direction). Here is an excellent video by Wilson Electronics on how an In-Building Signal Booster. The signal is amplified and sent back to the tower via the outside antenna. The inside antenna captures the signal, and it travels to the amplifier. Sending a cellular signal works in reverse. The signal is then amplified and rebroadcast through the Inside antenna. The signal transfers to the Cellular Repeater Amplifier through a cable. The Basic SystemĪ cell repeater system is a system that takes the cellular signal from outside a building, amplifies it, then repeats (rebroadcasts) the signal inside of a building.Ī simple repeater system consists of 3 essential components:Ī cellular repeater system captures the signal using the Outside Antenna. If you need more help or have questions, please feel free to contact us. Remember, much of the following are generalizations and simplifications but enough information to select parts for a simple system. We explain the components and factors to consider when selecting each part of a system. We've put together a brief summary of the basics of an in-building cellular signal repeater system in nontechnical terms.
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