Liquid-Crystal-Based Beam-Steering Guided-Wave Metasurface Antenna at Millimeter-Wave Band

被引：0
作者：
Park, Jinki [1 ]
Yoo, Youngin [1 ]
Lee, Changjae [2 ]
Yoon, Dong Ki [2 ]
Park, Seong-Ook [1 ]
机构：
[1] Korea Adv Inst Sci & Technol KAIST, Sch Elect Engn, Daejeon 34141, South Korea
[2] Korea Adv Inst Sci & Technol KAIST, Dept Chem, Daejeon 34141, South Korea
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2024年 / 23卷 / 12期
关键词：
beam steering; liquid crystal (LC); Antenna array; metasurface; millimeter-wave (mmWave); PATCH ANTENNA; PRETILT ANGLE; MODEL;
D O I：
10.1109/LAWP.2024.3439587
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：
In this letter, we present the design and fabrication of a liquid crystal (LC)-based metasurface antenna for millimeter-wave beam-steering applications. Unlike the conventional beamforming systems that rely on phase shifters, our approach harnesses the electrical tunability of LCs. We target a frequency of 34.5 GHz, taking advantage of the pronounced low dielectric loss characteristics exhibited by LCs. The proposed antenna uses a substrate-integrated waveguide (SIW) to feed millimeter-wave to metasurface unit cells, and each cell's radiation is controlled through dc voltage biasing of the. The measurement results demonstrate a beam-steering range of 120 degrees with a maximum gain of 10.754 dBi and a sidelobe level (SLL) of -11.562 dBc at the boresight.
引用
收藏
页码：4208 / 4212
页数：5
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