If your home or office is in a cellular dead zone or you make most of your calls from inside a building where cellular reception is low, a cell repeater can help you boost reception.
A cellular repeater, cell phone repeater, or wireless cellular signal booster, a type of bi-directional amplifier (BDA) as commonly named in the wireless telecommunications industry, is a device used for boosting the cell phone reception to the local area by the usage of a reception antenna, a signal amplifier and an internal rebroadcast antenna.
Made up of a few more parts than a femtocell, a cell repeater includes an antenna, an amplifier, and a coaxial cable that connects them. The antenna is placed either outside your building or on a window (via suction cups), and then you can string the coaxial cable to the most convenient spot to place the amplifier. Some cell repeaters include an additional indoor antenna, but many of them integrate that into the amplifier.
The antenna grabs a range of supported frequencies and then retransmits them with a stronger signal from the amplifier. When you make a call or use data when within the cell repeater's range, the indoor antenna picks up the signal from your mobile phone and transmits it through the outdoor antenna.
One advantage of cellular repeaters is an increase in the cell phone's battery life due to the lower power required to broadcast the signal to the local bi-directional amplifier, due to its proximity to the phone.
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