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PIERS Online
Vol. 4
No. 1
2008
pp: 36-40Reduction of EMI and Mutual Coupling in Array Antennas by Using DGS and AMC StructuresAlireza Mahmoudian and Jalil A. Rashed-Mohassel doi:10.2529/PIERS070929160639 Downloads: 1264 Abstract:Considering the difficulty of via construction in EBG structures and the cost of lossy materials and absorbers, in this paper, we look for implementing DGS and Artificial Magnetic Conductor to reduce mutual coupling in enclosures and array antennas particularly in CBS antennas. Circular ring defected ground structure and capacitive loaded AMC strips are designed and optimized to have electromagnetic band gaps and incident wave reflection features, respectively, in the resonant frequency band of cavity backed slot (CBS) antenna. The complete structure consists of CBS antenna with circular ring DGS and CLS-AMC. These structures are investigated and enhancement in EMI and the radiation patterns of this antenna is observed.References:1. Georgakopoulos, S. V., C. R. Birtcher, and C. A. Balanis, "Coupling modeling and reduction techniques of cavity-backed slot antennae: FDTD versus measurements," IEEE Trans. Electromagn. Compat., Vol. 43, No. 3, 261-272, Aug., 2001. 2. Abhari, R. and V. Eleftheriades, "Physics-based CAD models for the analysis of Vias in parallel-plate environments," IEEE Trans. Microw. Theory Tech., Vol. 49, No. 10, Oct., 2001. 3. Sievenpiper, D., Z. Lijun, R. F. Broas, N. G. Alexopoulos, and E. Yablonovitch, "High-impedance electromagnetic surfaces with a forbidden frequency band," IEEE Trans. Microw. Theory Tech., Vol. 47, No. 11, 2059-2074, Nov., 1999. 4. Feresidis, P., G. Apostolopoulos, N. Serfas, and J. C. Vardaxoglou, "Closely Coupled Metal-lodielectric Electromagnetic Band Gap (CCMEBG) structures formed by double layer dipole and tripolearrays," IEEE Trans. Antennas Propagat., Vol. 52, No. 5, 1149-1158, May, 2004. 5. Mohajer-Iravan, B. and S. Shahparnia, "Coupling reduction in enclosures and cavities using electromagnetic band gap structures," IEEE Trans. Electromagn. Compat., Vol. 48, No. 2, 292-302, May, 2006. 6. Oskouei, H. D. and K. Forooraghi, "Guided and leaky wave characteristics of periodic defected ground structures," Progress in Electromagnetics Research, Vol. PIER 73, 15-27, 2007. 7. Ziolkowski, R. W., "Design, fabrication, and testing of double negative metamaterials," IEEE Trans. Antennas Propagat., Vol. 51, No. 7, 1516-1529, July, 2003. |
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