Will rainy weather affect the spread of wireless signals?

The electromagnetic wave of wifi can only travel in a straight line, and the diffraction phenomenon is very weak. Rainy days and foggy days have great influence on the absorption and scattering of radio waves. The attenuation of rainy days is mainly due to the scattering and absorption of radio waves by raindrops, and the absorption of radio waves in foggy days plays a more important role than scattering.

Wifi coverage is generally only 200 meters (open area) and 50 meters (indoor), which is not affected by the weather.

1, the influence of lightning on wireless bridge

In order to ensure the transmission quality and avoid obstacles, wireless bridges are usually erected in high positions and are vulnerable to lightning strikes. Therefore, all kinds of lightning protection measures should be complete, not only to prevent lightning strikes, but also to prevent induction lightning. We should not only use the wireless bridge with lightning protection function, but also pay attention to the standard lightning protection measures, such as installing lightning rod, radio frequency lightning protector and network lightning protector. Installation of lightning rod can prevent direct lightning, installation of radio frequency lightning arrester can drain induced lightning underground, and installation of network lightning arrester can eliminate instantaneous high voltage of baseband cable.

2. The influence of rainstorm on wireless bridge

When electromagnetic waves in the air meet rain, raindrops will absorb and scatter electromagnetic waves, thus causing attenuation, commonly known as rain decay. The magnitude of rain attenuation is closely related to the ratio of raindrop radius to wavelength, and raindrop radius is related to rainfall rate. Heavy rain usually has heavy raindrops, which will increase the rain attenuation of wireless bridges and then affect signal transmission. Therefore, it is necessary to waterproof the connector to avoid rainwater flowing back to the wireless monitoring equipment with the cable in rainy days, which will cause the wireless monitoring equipment to enter the water.

In order to ensure the stable operation of wireless bridge, lightning protection and waterproof work should be done well in the early stage of wireless bridge installation, and at the same time, sufficient redundancy should be ensured in bandwidth design and antenna gain design at all times to avoid a lot of maintenance work in the later stage.