Electrically Controlled Millimeter-Wave Transmission Properties of Stack-Layered Liquid Crystal Cells with Metal Substrates
Electrically Controlled Millimeter-Wave Transmission Properties of Stack-Layered Liquid Crystal Cells with Metal Substrates
复制标题
金属基板叠层液晶盒的电控毫米波传输特性
DOI：
10.1143/jjap.40.4131
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发表时间：
2001
影响因子：
1.5
通讯作者：
Susumu Sato
中科院分区：
文献类型：
--
作者：
Masaki Tanaka;Susumu Sato
针对毫米波区域提出了采用金属基板的具有堆叠层结构的新型液晶（LC）单元，其具有大的有效路径长度。我们采用时域有限差分（FDTD）方法来计算液晶盒的毫米波传输特性。由于叠层结构单元具有周期性，因此使用 Floquet 边界条件将分析简化为一个单元。通过向液晶盒施加电压，在 47 至 53 GHz 和 86 至 94 GHz 范围内测量传输特性，可以获得传输变化 (∼ 50%)。随着施加电压的增加，传输峰值频率向低频方向移动，与计算结果一致。向列液晶的介电和吸收各向异性是在这些毫米波长范围内估计的。
Novel liquid crystal (LC) cells with a stack-layered structure using metal substrates, which have a large effective path length, are proposed for the millimeter-wave region. We adopt the finite-difference time-domain (FDTD) method to calculate the millimeter-wave transmission properties of the LC cells. The Floquet boundary condition is used to reduce the analysis to one unit cell, since the stack-layered structure cell has a periodicity. The transmission properties are measured from 47 to 53 GHz and 86 to 94 GHz ranges by applying a voltage to the LC cell, and transmission changes (∼ 50%) can be obtained. The transmission peak frequency shifts toward the lower frequency by increasing the applied voltage and agrees with that obtained by calculation. The dielectric and absorption anisotropies of nematic LC are estimated for these millimeter-wavelength ranges.