Design Guideline of Waveguide-Below-Cutoff Array for Electromagnetic Pulse Shielding

EMP 차폐 도파관의 형상 결정 가이드라인 작성

  • Received : 2016.02.23
  • Accepted : 2016.03.18
  • Published : 2016.03.31


Convenient design guideline for Waveguide-below-cutoff (WBC) array is proposed to obtain the minimum waveguide length for electromagnetic pulse (EMP) shielding. The analysis includes circular, rectangular, and hexagonal WBC, determine the total length of the waveguide. When the unit side of rectangular WBC and the diagonal line of hexagonal WBC are given as 30 mm, the length of hexagonal WBC is 5 mm shorter than rectangular case with shielding effectiveness (SE) 80 dB. The length difference is deepened with SE of 100 dB, which shows approximately 30 mm shorter length for hexagonal case than others. In addition, hexagonal WBC requires much shorter length than circular WBC. In conclusion, hexagonal case is the most effective with respect to flow velocity and pressure loss for equivalent SE.


EMP;Duct;Waveguide-Below-Cutoff;WBC Array;CFD;Sheilding effectiveness


  1. Richard B. Schulz, V. C. Plantz, and D. R. Brush, (1988) Shielding theory and practice, IEEE Transactions on Electromagnetic Compatibility, vol. 30, no. 3.
  2. Yi-Ru Jeong, Ic-Pyo Hong, Hueng-Jae Chun, Yong Bae Park, Youn-Jae Kim, Jong-Gwan Yook,(2014), Scattering analysis of curved FSS using Floquet harmonics and asymptotic waveform evaluation technique, Steel and composite structures.
  3. W. A. Bereuter, D. Chang, (1982), Shielding effectiveness of metallic honeycombs, IEEE Transactions on EMC.
  4. S.K.Pang, Y.T.Chae, J.G.Yook, Yuna Kim, Sangin Kim, (2015), Air Stream around EMP Protective Device for Emergency Power System, Proceedings of the Geothermal Energy Engineers, Vol. 1, Korea Society of Geothermal Energy Engineers, Daejeon, Korea, pp.41-44.


Supported by : 국토교통부