Systematic Design of THz Leaky-Wave Antennas Based on Homogenized Metasurfaces
Systematic Design of THz Leaky-Wave Antennas Based on Homogenized Metasurfaces
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DOI：
10.1109/tap.2018.2794393
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发表时间：
2018-03-01
影响因子：
5.7
通讯作者：
Galli, Alessandro
中科院分区：
文献类型：
--
作者：
Fuscaldo, Walter;Tofani, Silvia;Galli, Alessandro
本文提出了一种太赫兹频段基于漏波的法布里-珀罗腔天线的系统设计。利用不同的拓扑结构来合成均匀的亚表面表明，特定的鱼网状单元特别适合于设计高效的太赫兹辐射装置。精确的全波模拟突出了所提出的几何结构的优点和缺点，充分考虑了技术约束和均匀化限制的界限。用可靠的解析和数值方法对不同设计的辐射性能进行了评估，并用全波模拟完全验证了不同设计的辐射性能。相关结果证实了所提出的系统设计，巩固了在微波频率下建立的漏波方法在更具挑战性和仍未探索的太赫兹范围内的有效性和有用性。
In this paper, a systematic design of Fabry-Perot cavity antennas based on leaky waves is proposed in the THz range. The use of different topologies for the synthesis of homogenized metasurfaces shows that a specific fishnetlike unit cell is particularly suitable for the design of efficient THz radiating devices. Accurate full-wave simulations highlight the advantages and disadvantages of the proposed geometries, thoroughly considering the bounds dictated by technological constraints and the homogenization limit as well. The radiative performance of different designs for achieving theoretical directivities ranging from 15 to 30 dB is evaluated with reliable analytical and numerical methods, and completely validated with full-wave simulations. The relevant results corroborate the proposed systematic design, consolidating the validity and the usefulness of the leaky-wave approach, well established at microwave frequencies, to the more challenging and still unexplored THz range.