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A Novel Transparent Microwave Thin Film Coating Technique Applied to Dual‑Band Antennas
Yu-Ming Lin,Hung-Wei Wu,Yung-Wei Chen,Cheng-Yuan Hung,Shoou-Jinn Chang,Yan-Kuin Su 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.6
In this paper, we propose a novel transparent microwave thin film coating technique and discuss its application in planardual-band antennas (0.9/5.55 GHz). We developed a new process for activating the nano-alignment thin film from high tolow resistivity (from 1.96 to 1.29 × 10−4 Ω cm) and from partial to full transparency (from 55 to 83% transmittance) within150 s. The platform of the activation process comprises a periodic electrode, an optical microscope, and an alternating currentsignal generator. The periodic electrode can effectively rearrange the nano-alignment thin film into an ordered arrangement,which enhances the properties of the thin film in the microwave frequency range. A high-transparency and low-resistivitydual-band antenna is designed and fabricated using the proposed microwave thin film coating technique. The dual-bandantenna has operating bandwidths of 740–960 and 5030–7030 MHz and potential applications in transparent electronicssuch as wearable devices and intelligent cars.