Advanced Liquid Crystals with Low Loss Tangent and FastResponse for Intelligent Reflecting Surface Antennas

被引：0
|
作者：
Fujisawa, Toru [1 ]
Sato, Hiroyasu [1 ]
Ishikawa, Wataru [2 ]
Toshima, Hiraku [2 ]
Nakatani, Masakazu [2 ]
Ishinabe, Takahiro [3 ]
Fujikake, Hideo [2 ]
Chen, Qiang [1 ]
机构：
[1] Tohoku Univ, Dept Commun Engn, Grad Sch Engn, Sendai, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Elect Engn, Sendai, Japan
[3] Tohoku Univ, Grad Sch Engn, Dept Management Sci & Technol, Sendai, Japan
来源：
ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS | 2024年 / 12卷 / 04期
关键词：
Loss tangent; Relative permittivity; Frequency dependence; Intelligent reflecting surfaces; Gigahertz band;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We are focusing our research attention on the improvement of performance for the intelligent reflecting surfaces (IRS) using liquid crystals. By realizing characterization of dielectric properties in liquid crystals using coaxial line in a wide range of frequency from 1 to 50 GHz, it is revealed that the 3-ring or 4-ring compounds possessing a high nematic-isotropic transition temperature exhibit the effects of reduction for loss tangent. For improving response time and loss tangent of IRS antenna using liquid crystals, low loss tangent reaching closely to0.01 at frequency over 40 GHz band and shortening decay time for the response in almost half were achieveds imultaneously by introducing para-terphenyl liquid crystal compounds without polar groups.
引用
收藏
页码：218 / 225
页数：8
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