Preventing Feedback in a Cell Phone Booster System
Feedback or Oscillation in a Cell Phone Booster System is typically a direct result of the signal from the internal antenna and the external antenna crossing paths and happens for a variety of reasons.
- Antennas are too close to one another
- Signal gets out of a window or open door and enters the signal stream of the external antenna
- The external antenna is directional and facing towards the internal antenna
- The internal antenna is directional and facing towards the external antenna
- Create isolation (separation) between the antennas by moving them further apart. Sometimes vertical separation is as good as horizontal so a longer pole or mount may be beneficial in creating this distance.
- Utilize a directional antenna as the donor (outside) antenna
- Place the donor antenna at the edge of a roof and position it away from the building
- Mount the internal antenna on a lower floor of the home or building if available
- Mount the internal antenna away from a window that is on the same side of the house or building as the donor antenna
- Mount the internal antenna away from a commonly used outward door that is on the same side of the house or building as the donor antenna
- Utilize in-line attenuators