The sea area is vast, far more than the land area, the transmission signal in the ocean propagation distance is longer, vulnerable to water absorption, attenuation and scattering, so that the signal quality is reduced. Multi-path propagation: There are many possible propagation paths in the ocean, including direct path, ground reflection path, sky scattering path, etc. These paths will cause multiple reflection, refraction and interference of the signal, increasing the complexity of the receiving end signal.
In the process of network optimization, long bridges often have coverage problems. The reasons for the problems are as follows: 1. The site is far from the bridge; the ordinary flat panel antenna has low gain, resulting in short coverage distance; 2. Ordinary flat-panel antennas have narrow vertical wave width and cannot cover both the far and near ends of the area. Either there is weak coverage or there is black under the tower; 3. The ordinary flat panel antenna has a large horizontal wave width, which is easy to interfere with neighboring areas or have overlapping coverage when covering a linear scene.
1. The carriage has good sealing performance and strong signal attenuation; 2, fast speed, signal frequency shift; 3. The flat antenna of the current network has a large horizontal wave width, and the signal is easy to leak, resulting in cross-area coverage or signal interference. 4. The vertical wave width of the current network flat panel antenna is small, which is easy to produce black under the tower or short coverage distance, thus resulting in small station spacing and high maintenance cost.
IPV4 / IPV6