Analysis and Design of Tunable THz 1-D Leaky-Wave Antennas Based on Nematic Liquid Crystals

被引：4
|
作者：
Fuscaldo, Walter [1 ]
Zografopoulos, Dimitrios C. [1 ]
Imperato, Francesca [2 ]
Burghignoli, Paolo [3 ]
Beccherelli, Romeo [1 ]
Galli, Alessandro [3 ]
机构：
[1] CNR, Ist Microelettron & Microsistemi, I-00133 Rome, Italy
[2] Microsoft, Azure Cloud & AI, I-20154 Milan, Italy
[3] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy
来源：
APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 22期
关键词：
leaky-wave antennas; tunable antennas; terahertz; frequency selective surfaces; liquid crystals; HIGH-IMPEDANCE; TRANSMISSION-LINE; GRAPHENE; METAMATERIALS; OPTIMIZATION; RADIATION; BEAMWIDTH; MODES;
D O I：
10.3390/app122211770
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The tunable properties of nematic liquid crystals (NLC) are here exploited in a peculiar leaky waveguide with artificial magnetic conductors as the lateral walls, a bottom metal ground plane, and a homogenized metasurface on top to obtain dynamic beamsteering at a fixed terahertz frequency. The waveguide consists of an NLC cell sandwiched between two dielectric layers. The proposed antenna system works on its transverse-magnetic leaky mode and is capable of radiating a beam that scans either by frequency or by changing the bias voltage applied across the NLC cell. The design parameters are optimized through a rigorous modal analysis of the structure, and the radiation performance is validated through full-wave simulations. The results are promising for the realization of next-generation tunable terahertz leaky-wave antennas.
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页数：14
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