Transmission Line Approach to Calculate the Shielding Effectiveness of an Enclosure With Double-Layer Frequency Selective Surface

• Published in: IEEE transactions on electromagnetic compatibility Vol. 57; no. 6; pp. 1736 - 1739
• Main Authors: SureshKumar, T. R., Venkatesh, C., Salil, P., Subbarao, B.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Apertures; Arrays; double-layer frequency selective surface (DLFSS); Electromagnetic compatibility; electromagnetic shielding; Enclosure; Equivalent circuits; Frequency selective surfaces; Greek cross FSS; Impedance; Mathematical analysis; Mathematical models; Resonant frequency; Shielding; shielding effectiveness (SE); Transmission lines; Apertures; shielding effectiveness (SE); Greek cross FSS; enclosure; electromagnetic shielding; double-layer frequency selective surface (DLFSS)
• ISSN: 0018-9375; 1558-187X
• DOI: 10.1109/TEMC.2015.2453333

The shielding effectiveness (SE) of a metallic enclosure with double-layer frequency selective surface (DLFSS) has been calculated using a transmission line theory-based analytical formulation. The DLFSS layer placed on the front and back sides of the enclosure consists of a Greek cross aperture array. The equivalent circuit method and an empirical method are used to calculate the impedance of the Greek cross FSS. Then, the SE is calculated for various incidence and polarization angles. Calculated results are compared with the measured and numerical simulation results.