volume | PIER Journals

Abstract

This article presents a miniaturized dual layer angularly stable quadband frequency selective surface (FSS) for shielding applications. The shield consists of four metallic square rings on a thin FR4 substrate of relative permittivity 4.4 and thickness 0.5 mm with two rings on top layer and other two rings in the bottom layer. The dimension of the shielding unit cell is 0.2λ × 0.2λ, for the lowest frequency. These shields have been analyzed in both planar and conformal configurations. The equivalent circuit models as well as analytical model are determined. The shield exhibits quad band band stop characteristics with transmission zeros at 5 GHz (4.3-5.8 GHz), 6.6 GHz (6.3-6.8 GHz), 8.3 GHz (7-8.8 GHz) and 15 GHz (11-17 GHz). These bands find their application in shielding upper WLAN band, sub 6 GHz 5G band C/Ku band for satellite communication. The proposed FSS prototype is fabricated and tested for shield effectiveness in an anechoic chamber. The proposed FSS design offers stable angular response up to 60˚ for planar and geometry. Simulated and measured transmission coefficients are in good agreement and hence well suited for shielding applications. As the structure is fourfold symmetric, it exhibits polarization insensitive and angular stability in all four bands.

1. Venkatesh, Gundu, Muthiah Thottappan, and Surya Pal Singh, "Highly angularly stable dual-band stop FSS for blocking satellite downlink frequencies," IEEE Transactions on Electromagnetic Compatibility, Vol. 64, No. 6, 2055-2059, Dec. 2022. Google Scholar

2. Yan, Liping, Liuliu Xu, Richard Xian-Ke Gao, Jinghan Zhang, Xuping Yang, and Xiang Zhao, "Angularly independent frequency selective surface with good ventilation for millimeter wave EM shielding," IEEE Transactions on Electromagnetic Compatibility, Vol. 64, No. 1, 251-254, Feb. 2022. Google Scholar

3. Shah, Gulab, Qunsheng Cao, Zain Ul Abidin, and Zubair Rafique, "A hybrid element triband frequency selective surface with high angular stability and polarization insensitivity," IEEE Transactions on Electromagnetic Compatibility, Vol. 62, No. 6, 2759-2764, Dec. 2020. Google Scholar

4. Ma, Yuhong, Weiwei Wu, Ye Yuan, Ximeng Zhang, and Naichang Yuan, "A convoluted structure for miniaturized dual-bandstop frequency selective surface," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 2, 328-332, Feb. 2019. Google Scholar

5. Ghosh, Anumoy, Mukesh Kumar, Sk Nurul Islam, and Santanu Das, "Design and analysis of a compact penta-band polarization-insensitive bandstop frequency selective surface," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 1, 59-63, Jan. 2020. Google Scholar

6. Bashiri, Maryam, Changiz Ghobadi, Javad Nourinia, and Maryam Majidzadeh, "WiMAX, WLAN, and X-band filtering mechanism: Simple-structured triple-band frequency selective surface," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 3245-3248, 2017. Google Scholar

7. Sampath, Sayi Soundariya and Ramprabhu Sivasamy, "A single-layer UWB frequency-selective surface with band-stop response," IEEE Transactions on Electromagnetic Compatibility, Vol. 62, No. 1, 276-279, Feb. 2020. Google Scholar

8. Natarajan, Rajesh, Malathi Kanagasabai, Sanjay Baisakhiya, Ramprabhu Sivasamy, Sandeepkumar Palaniswamy, and Jayaram Kizhekke Pakkathillam, "A compact frequency selective surface with stable response for WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 718-720, 2013. Google Scholar

9. Kumar, T. R. Suresh and K. J. Vinoy, "A miniaturized angularly stable FSS for shielding GSM 0.9, 1.8, and Wi-Fi 2.4 GHz bands," IEEE Transactions on Electromagnetic Compatibility, Vol. 63, No. 5, 1605-1608, Oct. 2021. Google Scholar

10. Wei, Pei-Shen, Cheng-Nan Chiu, and Tzong-Lin Wu, "Design and analysis of an ultraminiaturized frequency selective surface with two arbitrary stopbands," IEEE Transactions on Electromagnetic Compatibility, Vol. 61, No. 5, 1447-1456, Oct. 2019. Google Scholar

11. Ünaldı, Sibel, Sibel Çimen, Gonca Çakır, and Umut E. Ayten, "A novel dual-band ultrathin FSS with closely settled frequency response," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1381-1384, 2016. Google Scholar

12. Sampath, Sayi Soundariya, Ramprabhu Sivasamy, and K. J. Jegadish Kumar, "A novel miniaturized polarization independent band-stop frequency selective surface," IEEE Transactions on Electromagnetic Compatibility, Vol. 61, No. 5, 1678-1681, Oct. 2019. Google Scholar

13. Yan, Mingbao, Shaobo Qu, Jiafu Wang, Anxue Zhang, Lin Zheng, Yongqiang Pang, and Hang Zhou, "A miniaturized dual-band FSS with second-order response and large band separation," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1602-1605, 2015. Google Scholar

14. Kartal, Mesut, J. J. Golezani, and B. Doken, "A triple band frequency selective surface design for GSM systems by utilizing a novel synthetic resonator," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 5, 2724-2727, May 2017. Google Scholar

Ms. Naveena Meka

Prof. Krishnan Shambavi