Broad-Band Design of Ferrite One-body EM Wave Absorbers for an Anechoic Chamber

  • Kim, Dong-Il (Dept. of Radio Sciences & Engineering, Korea Maritime University) ;
  • Son, June-Young (Dept. of Radio Sciences & Engineering, Korea Maritime Universit) ;
  • Park, Woo-Keun (Dept. of Radio Sciences & Engineering, Korea Maritime Universit) ;
  • Park, Dong-Han (Dept. of Radio Sciences & Engineering, Korea Maritime University)
  • Published : 2004.06.01


With the progress of the electronics industry and radio communication technology, certain problems, such as electromagnetic interference(EMI), have arisen due to the increased use of electromagnetic(EM) waves. International organizations such as CISPR, FCC, and ANSI have provided the standards for the EM wave environment and for the countermeasure of the electromagnetic compatibility(EMC). EM wave absorbers are used for constructing an anechoic chamber to test and measure EMI and electromagnetic susceptibility(EMS). In this paper, we have designed an one-body EM(electromagnetic) wave ferrite absorber, based on the equivalent material constants method for both normally and obliquely incident waves, whose absorption abilities are superior to that of the conventional ones. The fabricated absorber has a thickness of 27.68 mm and shows an absorption ability over 20 ㏈ in the frequency from 30 MHz to 6 ㎓.


  1. Proceedings of Korea EMC/EMI Society v.6 no.2 A comparative study on measuring methods of absorption characteristics for electromagnetic wave absorber using time domain method Dong Il Kim;Sang-Tae Kim;Ji-Yong Park;Se-Mo Chung
  2. CISPR11, IEC ISM radio frequency equipment electromagnetic disturbance characteristics limits & methods of measurement IEC
  3. IEC 61000-4-3(Edition 1.1) Testing and measurement techniques-Radiated, radio-frequency, electromagnetic field immunity test IEC
  4. ANSI C63.4-1992 American National Standard Guide for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz ANSI
  5. International Standard, IEC-1000-4-3 Electromagnetic compatibility (EMC)
  6. Proceedings of Korea Electro-magnetic Engineering Society v.4 no.2 A study on development of ferrite wave absorber with cutting cone-shaped type Dong Il Kim;Ch. G. Park;Y. S. Won;Y. G. Lee
  7. JKEES v.1 no.1 A study on fabrication and evaluation of ferrite electromagnetic wave absorber Dong Il Kim;June Young Son;J. Y. Bae;Y. S. Won;J. M. Song
  8. IEEE Trans. EMC v.38 no.2 Electromagnetic wave absorber with wideband frequency characteristics using exponentially tapered ferrite Dong Il Kim;M. Takahashi;H. Anzai;S. Y. Jun
  9. EMCJ 91-81, IEICE Technical Report Design of the grid type ferrite electromagnetic wave absorber Y. Naito;M. Takahashi;H. Anzai;T. Mizumoto
  10. IEICE Trans. COMMUN. v.E86-B no.9 Broad-band design of ferrite absorber in cross-shaped projection type D. I. Kim;C. G. Park;J. Y. Son;J. Y. Bae;J. M. Song