摘要
磁电偶极子天线有着宽带、对称方向图、低后瓣和稳定增益等优越性能,在诸如基站天线设计等应用场合颇受青睐.另一方面,随着通信系统朝着大容量、高可靠性和智能化等方向发展,可重构天线因其可重配置的天线特性受到广泛关注.该文总结回顾了极化可重构磁电偶极子天线的研究进展,着重介绍了一种高天线效率、三种极化选择和一种单端口、四种极化选择的磁电偶极子天线的设计和分析.相对于传统的基于微带天线的极化可重构设计,提出的基于磁电偶极子天线的极化可重构天线,具有交叠带宽宽,方向图对称,增益稳定等优点;并且通过采用如低损耗的可重构微扰结构和交叉阵子结构馈电等技术,可以实现较高的天线效率或是更少的馈电端口和不复杂的直流偏压电路.其在未来高度集成化、绿色和智能化的无线通信系统中有着一定的应用前景.
Superior performances such as wideband, symmetric radiation patterns, low back radiation and stable gain have made the magneto-electric （ME） dipole attractive to researchers and engineers, especially for the base station antenna designs. On the other hand, reconfigurable antenna has received a wide range of interests as it provides agility in antenna characteristics like polarization, operation frequency and radiation pattern. In this paper, we present the recent developments in polarization reconfigurable ME dipoles, and in particular we discuss a high-efficiency tri-polarization reconfigurable and a single-port quad-polarization reconfigurable designs. Compared to conventional polarization reconfigurable antennas that are based on microstrip antennas, the proposed polarization reconfigurable ME dipole antennas have a wide overlapped bandwidth, symmetric radiation and stable gain. By utilizing new techniques such as the low-loss reconfigurable perturbation as well as the cross-dipole feeding structure, a high antenna efficiency or less feeding port without complex biasing network can be realized. Potential application of these antennas can be found in future high data-rate, energy-conservation and intelligent wireless communication systems.
作者
吴凡
陆贵文
WU Fan,LUK Kwai-Man(State Key Laboratory of Millimeter Waves,City University of Hong Kong, Hong Kong 999077, Chin)
出处
《电波科学学报》
EI
CSCD
北大核心
2018年第3期287-292,共6页
Chinese Journal of Radio Science
关键词
可重构天线
磁电偶极子天线
极化可重构
宽带
高效率
reconfigurable antennas
magneto-electric dipole
polarization reconfigurability
wideband
high efficiency
