Design of composite right/left-handed transmission line for phase shifter of multi-band base station antenna
Design of composite right/left-handed transmission line for phase shifter of multi-band base station antenna
复制标题
多频段基站天线移相器复合右/左手传输线设计
DOI：
10.1051/epjam/2018009
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yoshihide Yamada and Keizo Cho
中科院分区：
文献类型：
--
作者：
Naobumi Michishita;Yoshihide Yamada and Keizo Cho
在多波段基站天线中，由于倾斜角度与频率无关，垂直平面上的波束宽度随着工作频率的降低而增加，因此在低工作频率下对相邻小区的干扰增加。本文提出利用左/右复合传输线的色散关系来实现不同频率的相移。利用单元电池等效电路模型阐明了相移的可行性。其次，设计了单元格实际结构的色散和布洛赫阻抗。实验验证了各频率处的反相移。
In multi-band base station antennas, interference toward neighboring cells at low operating frequency in-creases since tilting angle is frequency-independent and beamwidth in the vertical plane increases as de-creasing the operating frequency. In this paper, the realization of the different phase shifts at each frequency is proposed by using the dispersion relation of the composite right/left-handed transmission line. The feasi-bility of the phase shift is clarified by using equivalent circuit model of the unit cell. Next, the dispersion and Bloch impedance of the actual configuration of the unit cell are designed. The inverse phase shift at each frequency is verified experimentally.