支持未来全频谱接入通信的基站天线研究综述

随着移动通信系统的快速更新迭代，使用的频段也越来越丰富，支持全频谱接入通信成为未来基站天线的发展趋势.而日趋紧张的站址资源对未来基站天线的小型化水平提出了更高的要求.文章首先介绍了当前多频段基站天线的研究进展和成果，概括了并排式、交错式、堆叠式和嵌套式四种多频段结构类型，着重分析了异频耦合的产生原理和抑制方法；然后总结出共口径技术和异频解耦技术是未来全频谱基站天线的关键技术；最后阐述了当前共口径技术和异频解耦技术存在的局限性，展望了未来全频谱基站天线的研究方向，包括多种共口径方式组合技术、宽带异频解耦技术和大规模共口径天线阵列解耦技术.

Review of base station antennas for future all-spectrum-access communications

With the rapid update of mobile communication system, more and more frequency bands are employed, so the all-spectrum-access communications become the development trend of base station antenna in the future. However, the ever-decreasing site resources require more miniaturized base station antenna. First, this paper introduces the current research advances and achievements on multi-band base station antenna, summarizes four types of multi-band structures: side-by-side, interleaved, stacked and embedded schemes, and focuses on analyzing the principle and suppression method of cross-band coupling. Then, it is concluded that share-aperture structure and cross-band decoupling technologies are the key for future all-spectrum base station antenna. Finally, the limitations of the current share-aperture schemes and cross-band decoupling technologies are expounded. And the future research directions of full-spectrum-access base station antennas are prospected, including the combination technologies of various share-aperture structures, broadband cross-band decoupling and the decoupling methods for massive share-aperture antenna array.