In last artical, we talked about some factors which affect the range of the wirelss devices. This one, will be the antenna.
1.Increase the effective height of the antenna as much as possible
From the formula for calculating the communication distance, it can be seen that the communication distance is proportional to the square root of the product of the effective height of the transmitting/receiving antenna. Increasing the effective height of the antenna can significantly increase the communication distance, especially in an urban environment. At the top, it can avoid many obstacles and stay away from interference sources, thereby expanding the communication range.
2.Use high gain antenna
The antenna is a passive device and cannot amplify the signal itself, but the high-gain antenna can significantly increase the energy density in the communication direction, increase the signal/noise ratio, and thus expand the communication range. Its function is similar to the condenser on a flashlight or searchlight. However, the cost of high-gain antennas is relatively high, the geometric size and weight are relatively large, and it is only suitable for fixed installation
3. Try to stay away from various sources of interference
The closer you are to the interference source, the lower the signal/noise ratio, which will also cause the communication distance to decrease.
4.Lightning protection, waterproof and moisture proof
For systems that use outdoor antennas, lightning and lightning protection measures must be taken, such as installing lightning rods and lightning arresters. At the same time, lightning protection and lightning protection measures must be taken for power supply lines and signal transmission lines that are overhead in the open to prevent lightning from entering the cable. machine.
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