The cellular signal booster is a device used for improving the quality of cell phone reception, and it is increasingly used by people nowadays. It consists of three main components the outside antenna, the amplifier, and the inside antenna. This device receives a weak cellular signal, amplifies it, and retransmits it to your cellular device. Moreover, the quality of output of this device is determined by the gain and output power of the amplifier. In this article, we will investigate the relationship between gain and output power, read on to know more about it.
Gain And Output Power
Gain is the number of times the output power is increased compared to the input power of the signal to the amplifier of the cellular signal booster and is expressed in dB. For example, 10 dB gain increases the power by 10 times, 20 dB gain increases the power by 100 times, and so forth. The table listed below will give you an idea about the relationship between dB and the increase in power.
- 10 dB = 10 times increase in power
- 13 dB = 20 times increase in power
- 16 dB = 40 times increase in power
- 19 dB = 80 times increase in power
- 20 dB = 100 times increase in power
- 30 dB = 1,000 times increase in power
- 40 dB = 10,000 times increase in power
- 50 dB = 100,000 times increase in power
- 60 dB = 1,000,000 times increase in power
Now, consider a direct connection amplifier with 10 dB gain and 3-watts output power. A 1-watt input power will increase it to 10 watts, but the excess power gives distorted 3-watts output power that causes interference to other cellular channels. To avoid this, the maximum input power that can be applied to it is 0.3 watts.
Higher Gain Amplifiers For Cell Service Booster
For a cell phone signal with a maximum power of 0.2-watts, a 12 dB and 3-watt amplifier will give undistorted output power. This is because the amplifier increases the power by 15 times. But, when the signal booster must receive and transmit from the inside antenna, the signal is weaker than the 0.2-watt input signal. To be precise, it is 660 times weaker than the input. In such a situation, a higher gain amplifier, i.e. a 40 dB gain amplifier will give 3-watt output. This is also the maximum gain used in signal boosters for automobiles.
It should be obvious from the details shared above that the gain of the amplifier used in a cellular signal booster is different for different applications.