Basic Performance of Rectangular Waveguide Type Liquid Crystal Phase Shifter Driven by Magnetic Field
Basic Performance of Rectangular Waveguide Type Liquid Crystal Phase Shifter Driven by Magnetic Field
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DOI：
10.1109/irmmw-thz.2018.8510116
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
T. Nose;Tomoyasu Ito;R. Ito;M. Honma
中科院分区：
文献类型：
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作者：
T. Nose;Tomoyasu Ito;R. Ito;M. Honma
利用U波段矩形波导中的液晶材料制作了工作在毫米波波段的矩形波导移相器。由于很难期望来自单元壁的表面排列效应的帮助来控制巨大单元中的LC分子取向，所以在各种驱动方法中，关断速度变得非常慢。在这项工作中，采用磁场驱动方法的金属包围的细胞和矢量控制的磁场施加通过使用四极电磁通用控制的LC分子取向。
Rectangular waveguide type phase shifter, working in the millimeter-wave region, is prepared by confining a nematic liquid crystal (LC) material in U-band rectangular waveguide. Since it is difficult to expect the help of surface alignment effects from the cell walls for the LC molecular orientation control in the huge cell, switching off speed becomes extremely slow in all kinds of driving methods. In this work, magnetic field drive method is adopted for the metal surrounded cell and a vector-controlled magnetic field is applied by using quadrupole electric magnet for versatile control of the LC molecular orientation.