With the development of the mobile communication industry, there are more and more common sites of multiple operators, and each operator needs to operate multiple networks at the same time. As a result, the sky resources of the sites are very tight, and there is no place to install equipment and antennas in the construction of 5G in a large number of existing stations. How to integrate the antenna feed system of the live network and give consideration to the network quality and construction cost has become one of the urgent problems to be solved. At the same time, the development of various services and applications of 5G network has increasingly higher requirements for network capacity, and the problem of how to effectively increase network capacity is becoming more and more important.

The options for increasing capacity are as follows: One is to increase spectrum utilization. Through higher order modulation, the amplitude and phase of radio waves are changed more, and more carriers of different states are generated to transmit more information. However, in the wireless environment, the complex modulation mode is easy to lead to higher bit error rate of data transmission, and the solution is complex. The second is to increase spectrum bandwidth. It is easier to increase bandwidth than to improve spectrum utilization. However, at present, the 4G frequency band is below 3GHz, the available bandwidth is limited, and the frequency band is strictly allocated, so the additional spectrum resources are limited, and the expansion prospect is insufficient. The third is to realize ultra-dense networking. By increasing the number of cells in the same area, users are divided into different cells to carry the load, and the unit area capacity density is improved, so as to realize the capacity increase. This is the most rapid, convenient and feasible capacity improvement solution at present. The main problems of super - dense network are site selection and interference coordination. At present, the common idea is to increase the site, more small stations, reduce the distance between stations and other ways to achieve ultra-dense networking. However, ultra-dense networking requires the site closer to the user and the height of the sky is moderate. Due to the excessive concern of the public about radiation and other issues, it is difficult to select a suitable site. At the same time, inter-cell interference coordination problems caused by site density will also increase, and dense cells will lead to increased overlapping coverage and deterioration of cell edge coverage quality. If inter-cell interference can not be effectively solved, the capacity gain brought by ultra-dense networking will decrease.

To solve the above problems, the 48-port multi-frequency multi-beam Luneburg lens antenna of EAHISON Communications Co., Ltd. came into being. The product can not only meet the requirements of integrating the sky surface and saving site resources, but also meet the requirements of refined network coverage and network capacity expansion, providing cost reduction, efficiency and green energy saving solutions.

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