High performance 2.4Ghz 5Ghz WiFi 2×2 MIMO directional panel sector antenna

If a traditional single-polarized antenna is used, the installation and installation of the antenna must be considered, and the best site is often abandoned because the antenna installation conditions (the need to build a tower to expand the antenna platform) are not available. If dual-polarized antennas are used, since dual-polarized antennas do not require high erection and installation, there is no need to requisition land to build towers, which saves capital investment and makes the layout of base stations more reasonable. The dual-polarization antenna allows the system to adopt the polarization diversity receiving technology. The principle is to use the non-correlation between the ±45° polarization directions, and the degree of the non-correlation between the two determines the quality of the diversity reception. Since ±45° is orthogonal polarization, it can effectively ensure diversity reception.

The polarization diversity gain is about 5dB, which is about 2dB higher than the space diversity normally used by single-polarized antennas. In addition, the spatial diversity reception effect of a single-polarization antenna is related to the positions of the two receiving antennas. The positive antenna coverage is the best, and it gradually weakens to both sides, resulting in a reduction in the actual coverage of the cell. Using polarization diversity instead of space diversity technology, diversity gain has almost nothing to do with antenna position, and the difference between the main coverage direction and the edge is very small (this difference is caused by the deterioration of the ±45° orthogonal effect due to the width of the reflection surface), so it can be effective Improve the reception at the edge to ensure coverage.