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FSS Design for Improving Transmission of Microwave Signals and Wireless Security in Modern Buildings

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Abstract

A fractal frequency selective surface (FSS) has been presented for hard coated energy saving glass (ESG) used in modern building architecture. Without FSS, the presence of coating on ESG surface blocks the transmission of useful radio frequency (RF)/microwave signals. The FSS consists of two self-similar cross dipole elements designed in the coating to provide a low-pass response from 0 GHz to 2.1 GHz with two additional band-stop responses at 2.45 GHz and 5.25 GHz. An average transmission loss of less than 2 dB has been achieved in the low-pass band while attenuations of 36 dB and 30 dB have been achieved for 2.45 GHz and 5.25 GHz wireless local area network (WLAN) bands, respectively, providing required security. The low-pass response improves the transmission of useful RF/microwave signals. However, the amount of removed coating due to FSS design is relatively higher, but heat loss has been minimized by pasting an inexpensive thin solar film on the back side of glass. This thin film has provided additional thermal insulation with almost no blockage to transmission of useful RF/microwave signals. A detailed parametric analysis has been done and their effect on FSS structure has been described. An equivalent circuit model has also been presented for the proposed FSS structure. A finite prototype containing 7 × 7 elements have been constructed and evaluated. The measured results have been found to be in good agreement with the simulated results. The proposed FSS design is an excellent candidate for WLAN security.

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Authors and Affiliations

  1. Department of Electronic Engineering, Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia

    Jahanzeb Khan & Nafarizal Nayan

  2. Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

    Ghaffer Iqbal Kiani & Mohammed Abdullah Hussaini

  3. British Malaysian Institute (BMI), Universiti Kuala Lumpur, 53100, Gombak, Malaysia

    Mohammed Abdullah Hussaini

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  1. Jahanzeb Khan
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  2. Nafarizal Nayan
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  3. Ghaffer Iqbal Kiani
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  4. Mohammed Abdullah Hussaini
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Correspondence to Jahanzeb Khan.

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Khan, J., Nayan, N., Kiani, G.I. et al. FSS Design for Improving Transmission of Microwave Signals and Wireless Security in Modern Buildings. J. Electron. Mater. 50, 3438–3446 (2021). https://doi.org/10.1007/s11664-021-08848-1

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  • DOI: https://doi.org/10.1007/s11664-021-08848-1

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