Ultra-Thin and Flexible Multi-Band Rejection EMI Shield


This paper presents the design and fabrication of an ultra-thin and flexible electromagnetic interference (EMI) shield that is capable of rejecting multiple unwanted frequencies. The design starts with the equivalent circuit model of periodic concentric rings to determine the initial geometrical dimensions of the rings efficiently. Then it followed by full-wave electromagnetic simulation to fine-tune the final dimensions for the desired frequency response. Impacts of various geometrical designs on the EMI shielding performance of the concentric ring design are analyzed and discussed. With these results, an ultra-thin and flexible EMI shield is fabricated using the screen printing technique. Finally, its multi-band rejection performance is validated experimentally. Good correlation between measurement and simulation is demonstrated in this paper.

Share and Cite:

Wang, L. , Zhang, J. , See, K. and Svimonishvili, T. (2014) Ultra-Thin and Flexible Multi-Band Rejection EMI Shield. Journal of Electromagnetic Analysis and Applications, 6, 163-173. doi: 10.4236/jemaa.2014.67016.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Unal, E., Gokcen, A. and Kutlu, Y. (2006) Effective Electromagnetic Shielding. IEEE Microwave Magazine, 7, 48-54.
[2] Hemming, L.H. (1992) Architectural Electromagnetic Shielding Handbook: A Design and Specification Guide. IEEE Press.
[3] Roll-to-Roll, Flexible, and Multi-Functional.
[4] Vardaxoglou, J.C. (1997) Frequency Selective Surfaces: Analysis and Design. Wiley, New York.
[5] Munk, B.A. (2000) Frequency Selective Surface: Design and Theory. Wiley, New York.
[6] Celozzi, S., Araneo, R. and Lovat, G. (2008) Electromagnetic Shielding. Wiley-Interscience, Hoboken.
[7] Stefanelli, R. and Trinchero, D. (2009) Scattering Analysis of Frequency Selective Shields for Electromagnetic Indoor Isolation. Microwave Optical Technology Letters, 51, 2758-2762.
[8] Wang, L.B., See, K.Y., Zhang, J.W., Salam, B. and Lu, A.C.W. (2011) Ultra-Thin and Flexible Screen Printed Metasurfaces for EMI Shielding Applications. IEEE Transaction on Electromagnetic Compatibility, 53, 700-705.
[9] Kiani, G.I., Olsson, L.G., Karlsson, A., Esselle, K.P. and Nilsson, M. (2011) Cross-Dipole Bandpass Frequency Selective Surface for Energy-Saving Glass Used in Buildings. IEEE Transactions on Antennas and Propagation, 59, 520-525.
[10] Mittra, R., Chan, C.H. and Cwik, T. (1988) Techniques for Analysing Frequency Selective Surfaces—A Review. IEEE Proceedings, 76, 1593-1615.
[11] Koleck, T., Diez, H. and Bolomey, J.C. (1997) Techniques for Analysing Finite Frequency Selective Surfaces. Antennas and Propagation Conference, 161-165.
[12] Teo, P.T., Lee, K.S. and Lee, C.K. (2004) Analysis and Design of Band-Pass Frequency-Selective Surfaces Using the FEM CAD Tool. International Journal of RF and Microwave Computer-Aided Engineering, 14, 391-397.
[13] Cai, Y. and Mias, C. (2006) Time and Frequency Domain Modelling of a Normally Incident Plane Wave at a Periodic Structure. The 6th International Conference on Computational Electromagnetics (CEM), 1-2.
[14] Savia, S.B. and Parker, E.A. (2003) Equivalent Circuit Model for Superdense Linear Dipole FSS. IEEE Proceedings on Microwave, Antennas and Propagation, 150, 37-42.
[15] Kent, E.F., Doken, B. and Kartel, M. (2010) A New Equivalent Circuit Based FSS Design Method by Using Genetic Algorithm. International Conference on Engineering Optimization, 1-4.
[16] Yao, X.Y., Bai, M. and Miao, J.G. (2011) Equivalent Circuit Method for Analyzing Frequency Selective Surface with Ring Patch in Oblique Angles of Incidence. IEEE Antennas and Wireless Propagation Letters, 10, 820-823.
[17] Fernandez, L., Garcia, E., Castro, D. and Segovia, D. (2005) Tool to Design Frequency Selective Surfaces Using an Equivalent Circuit Model. Microwave Technology Letters, 47, 464-467.
[18] Prakash, V.V.S. and Mittra, R. (2003) Technique for Analysing Cascaded Frequency Selective Surface Screens with Dissimilar Lattice Geometries. IEE Proceedings, Microwave, Antennas and Propagation, 150, 23-27.
[19] Manicoba, R.H.C., Assuncao, D. and Campos, A.L.P.S. (2010) Wide Stop-Band Cascaded Frequency Selective Surfaces with Koch Fractal Elements. The 14th Biennial Electromagnetic Field Computation Conference, May 2010.
[20] Narayan, S., Pasad, K., Nair, R.U. and Jha, R.M. (2011) A Novel EM Analysis of Cascaded Thick FSS Using Mode-Matching Generalized Scattering Matrix Technique. IEEE Applied Electromagnetics Conference, Kolkata, 18-22 December 2011, 1-4.
[21] Wu, T.K. and Lee, S.W. (1994) Multiband Frequency Selective Surfaces with Multi-Ring Patch Surfaces. IEEE Transactions on Antennas and Propagation, 42, 1484-1490.
[22] Kim, D.H. and Choi, J.I. Design of a Multiband Frequency Selective Surface. ETRI Journal, 28, 506-508.
[23] Marcuvitz, N. (1986) Waveguide Handbook: Peter Penguins Pte Lte.
[24] Anderson, B.I. (1975) On the Theory of Self-Resonant Grids. The Bell Systems Technical Journal, 54, 1725-1731.
[25] Hamdy, S.M.A. and Parker, E.A. (1982) Comparison of Modal Analysis and Equivalent Circuit Representation of E-Plane Arm of the Jerusalem Cross. Electronics Letters, 18, 94-95. http://dx.doi.org/10.1049/el:19820064
[26] Langley, R.J. and Parker, E.A. (1982) Equivalent Circuit Model for Arrays of Square Loops. Electronics Letters, 18, 294-296.
[27] Luo, X.F., Teo, P.T., Qing, A. and Lee, C.K. (2005) Design of Double-Square-Loop Frequency-Selective Surfaces Using Differential Evolution Strategy Coupled with Equivalent-Circuit Model. Microwave and Optical Technology Letters, 44, 159-162.
[28] Gupta, K.C., Gurg, R. and Bahl, I.J. (1979) Microstrip Lines and Slot Lines. Artech House, Dedham.
[29] Pozar, D.M. (1998) Microwave Engineering. 2nd Edition, Wiley, New York.
[30] www.cst.com
[31] Ko, W. and Mittra, R. (1993) Implementation of Floquet Boundary Condition in FDTD for FSS Analysis. Antennas and Propagation Society International Symposium, Ann Arbor, 28 June-2 July 1993, 14-17.
[32] Periodic Arrays: FSS/ EBG/ PBG/ LHM, CST Microwave Studio 2006B Application Notes.
[33] Schroder, D.K. (2006) Semiconductor Material and Device Characterization. IEEE Press.
[34] Bowler, N. and Huang, Y.Q. (2005) Electrical Conductivity Measurement of Metal Plates Using Broadband Eddy-Current and Four-Point Methods. Measurement Science Technology, 16, 2193-2200.
[35] Electrical Conductivity Measurement of Non-Ferrous Metals Enters a New Dimension.
[36] Wang, L.B., See, K.Y., Chang, W.Y., Ng, S.T. and Lu, A.C.W. (2010) Electromagnetic Shielding Analysis of Printed Flexible Meshed Screens. Asia-Pacific Symposium on Electromagnetic Compatibility, Beijing, 12-16 April 2010, 965-968.
[37] Nakamura, D. (2008) Advanced Screen Printing—Practical Approaches for Printable & Flexible Electronics. International Microsystems, Packaging, Assembly & Circuits Technology Conference, 205-208.
[38] Marvin, A.C., Dawson, L., Flintoft, I.D. and Dawson, J.F. (2009) A Method for the Measurement of Shielding Effectiveness of Planar Samples Requiring No Sample Edge Preparation or Contact. IEEE Transactions on Electromagnetic Compatibility, 51, 255-262.
[39] R&S®ZVB8 Vector Network Analyzer Datasheet.
[40] Mur, G. (1981) Absorbing Boundary Conditions for the Finite-Difference Approximation of the Time-Domain Electromagnetic-Field Equations. IEEE Transaction on Electromagnetic Compatibility, EMC-23, 377-382.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.