The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Bandwidth Analysis of a Jerusalem AMC Based on Equivalent Circuit Model

등가회로 모델을 이용한 Jerusamel AMC의 이동통신 대역폭 해석

  • Received : 2010.07.20
  • Accepted : 2010.10.15
  • Published : 2010.10.31
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Abstract

The bandwidth of a Jerusalem AMC was investigated based on the equivalent circuit model. Using the circuit model and the derivative of the admittance(Y'), the relation between the bandwidth and various circuit parameters was analyzed. It was shown that the substrate thickness and permeability enhance the bandwidth whereas the loadings on FSS grid degrade the bandwidth. Among the two loadings, the capacitive loading had better bandwidth characteristics than the inductive loading. AMC with single polarization was suggested to relax the bandwidth degradation by the inductive loading.

등가회로 모델을 바탕으로 Jerusalem AMC의 대역폭에 대하여 살펴보았다. 등가회로 모델과 어드미턴스 기울기 (Y')를 이용하여 다양한 파라미터의 변화에 따른 대역폭을 분석하였다. 기판의 두께 및 투자율은 대역폭을 향상시키는 반면, FSS grid의 부하(loading)에 의해 대역폭은 감소한다. FSS의 두 부하 중에서, 커패시터 부하가 인덕터 부하에 비해 대역폭 특성이 더 우수한 특성을 가진다. 인덕터 부하에 따른 대역폭 감소를 완화하기 위해 단일편파 특성을 가지는 AMC를 제안하였다.

Keywords

References

  1. D. Sievenpiper, L. Zhang, R. F. J. Broas, N. G. Alexopolus, and E.Yablonovitch, "High-impedance electromagnetic surfaces with a forbidden frequency band," IEEE Trans. Microwave Theory Tech., vol. 47, pp. 2059-2074, Nov. 1999. https://doi.org/10.1109/22.798001
  2. Constantin R. Simovski, Peter de Maagt, and Irina V. Melchakova, "High-impedance surfaces having stable resonance with respect to polarization and incidence angle," IEEE Trans. Antennas Propag., vol. 53, no. 3, pp. 908-914, Mar. 2005. https://doi.org/10.1109/TAP.2004.842598
  3. Alexander B. Yakovlev, Mario G. Silveirinha, Olli Luukkonen, Constantin R. Simovski, Igor S. Nefedov, and Sergei A. Tretyakov, "Characterization of surface-wave and leaky-wave propagation on wire-medium slabs and mushroom structures based on local and nonlocal homogenization models," IEEE Trans. Microwave Theory Tech., vol. 57, no. 11, Nov. 2009.
  4. F. Yang, K. –P. Ma, Y. Qian, and T. Itoh, "A novel TEM waveguide using uniplanar compact photonic-bandgap (UC-PBG) structure," IEEE Trans. Microw. Theory Tech., vol. 47, no. 11, pp. 2092-2098, Nov. 1999. https://doi.org/10.1109/22.798004
  5. M. Paquay, J. Iriarte, I. Ederra, R. Gonzalo, and P. Maagt, "Thin AMC structure for radar cross-section reduction," IEEE Trans. Antennas Propag., vol. 55, no. 12, pp. 3630-3638, Dec. 2007. https://doi.org/10.1109/TAP.2007.910306
  6. Mirshahram Hosseinipanah, Qun WU, "Equivalent circuit model for designing of Jerusalem cross-based artificial magnetic conductors" Radioengineering, vol. 18, no. 4, Dec. 2009.