Recent advances in transparent reflectarray antennas
Transparent Reflectarray Antennas (TRAs) have emerged as a promising solution for next-generation communication systems requiring both electromagnetic performance and optical transparency. This review focuses on a detailed latest work on unit cell design innovations, material engineering, and perf...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Institute Of Electrical And Electronics Engineers Inc.
2025
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| Online Access: | http://eprints.utem.edu.my/id/eprint/29641/2/02622220920251415302152.pdf http://eprints.utem.edu.my/id/eprint/29641/ https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11153393 |
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| Summary: | Transparent Reflectarray Antennas (TRAs) have emerged as a promising solution for
next-generation communication systems requiring both electromagnetic performance and optical transparency. This review focuses on a detailed latest work on unit cell design innovations, material engineering,
and performance optimization across microwave, millimeter-wave, and terahertz frequency bands. Key
developments include the use of fine metal lines (FML), frequency selective surfaces, indium tin oxides (ITO)
films, and liquid crystal-based reconfigurable structures to achieve wide phase tuning, low reflection loss,
and high transmittance. Various fabrication techniques, such as photolithography on quartz and soda-lime
glass substrates, have enabled lightweight and high-efficiency RA structures suitable for integration into
smart windows, satellite platforms, and 6G communication devices. Additionally, transparent beam-steering
mechanisms using anisotropic liquid crystal (LC) materials and metallic mesh frameworks demonstrate
the feasibility of dynamic control while maintaining optical clarity. The paper also discusses current
challenges—such as optical loss, material limitations, and fabrication complexity—and outlines future
directions aimed at enhancing bandwidth, reconfigurability, and multifunctional performance of TRAs |
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