This means that if the signal going into the amplifier includes unwanted noise, that noise will be amplified along with the signal. The main problem with antenna amplifiers is that they are not picky about what they amplify. For example, an FM amplifier can increase the gain of the signals it receives by 15 dB, which can mean the difference between patchy reception, incoming and outgoing, and a constant signal input to the head unit. CAR RADIO ANTENNA BOOSTER INSTALLYou can install an amplifier between the antenna and the main unit to solve the problem.Īn antenna booster is a powered unit that amplifies the signal by a specific amount before it reaches the main unit. If a radio signal is barely strong enough for the antenna to pick up, you will usually experience reception problems when the head unit picks it up and drops it. To do this, the radio signal must be picked up by the car’s antenna and transmitted to the central unit through an antenna cable. This carrier wave is modulated to carry an audio signal, which is removed, amplified, and sent to the speakers by the head unit’s tuner. Simply put, each radio station transmits an electromagnetic radio “carrier” wave on a specific frequency. To understand how a signal booster works, it is important to understand how an FM radio works. The only thing an antenna booster can help with is a radio signal that is too weak for the head unit’s tuner to reliably lock onto. You can’t boost what isn’t there, so these devices can’t help if there are issues with basic car audio hardware. If you encounter fences caused by tall buildings in the area, or find yourself in a dead zone caused by buildings, hills, or other obstructions, an antenna booster won’t do much good.
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