Shortfalls in the installation and maintenance procedure of electronic devices can affect their performance adversely. Cell phone booster, the device designed to boost cellular signals at its installed location demands failsafe installation and maintenance procedures.
Oscillation or feedback is common in electronic devices, whereby a positive feedback loop is established between the output and input of the device. The oscillation occurs in cell phone booster when the signals from the indoor antenna and outdoor antenna cross over.
Oscillation In Cell Phone Booster
Although the effects of oscillation/feedback are different in different electronic systems, the basic underlying principle is the same; positive feedback is being established between the input and output. Cell phone booster has three major components, outdoor antenna, amplifier, and indoor antenna. The outdoor antenna captures external cellular signals and transfers it to the amplifier by means of coaxial cable. The amplifier boosts the signals and sends them to the indoor antenna, which then rebroadcasts the amplified signals.
When the outdoor antenna picks up the signals broadcasted by the indoor antenna and passes them again through the system, feedback is said to have occurred. As a result of oscillation, noise that is similar to the screech produced due to oscillation in the microphone-speaker system is produced. Feedback in signal boosters leads to poor cell phone reception.
Modern cell phone boosters are pre-equipped with mechanisms that shut down the booster when oscillation is detected.
Solutions For Oscillation In Signal Boosters
The separation between the outdoor antenna and the indoor antenna is the most suggested solution that can prevent oscillation in cell phone boosters. If the antennas are separated by a large distance, the outdoor antenna will not be able to pick the signals broadcasted by the indoor antenna.
In the case of vehicle signal boosters, separating the antennas by a large distance is not always possible. A metallic shield introduced between the tower antenna (outdoor antenna) and device antenna (indoor antenna) can efficiently prevent the oscillation in the booster system. Place the outdoor antenna on the roof of the vehicle, so that the metallic roof acts as the shield between the device antenna and the tower antenna.
In buildings, vertical separation of the antennas is practiced more than horizontal separation primarily because the outdoor antenna broadcasts signals along the horizontal plane. When compared to omni-directional antennas that cover all directions equally, directional antennas require smaller separation distance.
Taking adequate measures to prevent oscillation in cell phone boosters will ensure strong cellular reception.