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Design and fabrication of optically transparent transmitarrays using inkjet-printing technology

Published online by Cambridge University Press:  29 April 2024

Han Chang ,
Fei-Peng Lai  and
Yen-Sheng Chen Open the ORCID record for Yen-Sheng Chen [Opens in a new window]
Han Chang
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
Fei-Peng Lai
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
Yen-Sheng Chen*
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
*
Corresponding author: Yen-Sheng Chen; Email: yschen@ntut.edu.tw
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Abstract

This paper explores the use of inkjet-printing technology for transparent transmitarrays, presenting a viable alternative to traditional copper microwire counterparts. The study focuses on achieving high-gain performance crucial for wireless communication systems, with a particular emphasis on the fifth-generation (5G) millimeter-wave communication. Transparent transmitarrays leverage transparent conducting films and conductive mesh structures, overcoming opacity limitations and seamlessly integrating with urban architecture. In this paper, the inkjet-printing process is detailed for fabricating transmitarray apertures, highlighting the flexibility and precision in depositing nanosilver particles onto a glass substrate. The design intricacies involve optimizing feeding characteristics, determining unit cell structures, and constructing transmitarrays of various sizes. To validate the proposed technique, three different apertures (15 × 15, 20 × 20, and 25 × 25 unit cells) are constructed. The antenna performances are evaluated in terms of reflection coefficients, radiation efficiency, realized gain, and patterns, demonstrating the effectiveness of inkjet-printed transmitarrays. Comparative analysis with copper microwire counterparts is also conducted, validating the inkjet-printing technology for similar gain performance with added advantages of flexibility, compatibility with transparent substrates, and cost-effective manufacturing.

Keywords

additive manufacturinginkjet-printingmillimeter wavetransmitarray antennastransparent antennas
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 11
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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