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Compact Spatial Triple-Band-Stop Filter for Cellular/PCS/IMT-2000 Systems
Dongho Kim, Junho Yeo, and Jaeick Choi
Abstract :	We propose a novel spatial multi-band-stop filter using modified multiple loop array elements to block electromagnetic waves or signals of mobile phones in public facilities. It operates at the following frequency bands: Korean cellular (824 MHz to 894 MHz), Personal Communication Service (PCS) (1.75 GHz to 1.87 GHz), and IMT-2000 (1.92 GHz to 2.17 GHz). Two frequency selective surfaces with modified multiple-loop elements are printed on the top and bottom of a pair-glass pane, which is a pair of glass panes with an air gap between them. A modified multiple-loop element with a meander line is used to make the size of the filter compact. The simulated and measured results show good agreement, which confirms the usefulness of the proposed tri-band spatial filter.
Key word :	Frequency selective surface (FSS), spatial filter, multi-band-stop filter.
DOI :	http://dx.doi.org/10.4218/etrij.08.0208.0160
Cite this :	Dongho Kim, Junho Yeo, and Jaeick Choi, "Compact Spatial Triple-Band-Stop Filter for Cellular/PCS/IMT-2000 Systems," ETRI Journal, vol. 30, no. 5, Oct. 2008, pp. 735-737. http://dx.doi.org/10.4218/etrij.08.0208.0160
References :	1. B.A. Munk, Frequency Selective Surface: Theory and Design, Wiley-Interscience, 2000. 2. R. Mittra, C.H. Chan, and T. Cwik, "Technique for Analyzing Frequency Selective Surfaces: A Review," IEEE Proceedings, vol. 76, no. 12, 1988, pp. 1593-1615. 3. D.H. Kim and J.I. Choi, "Design of a Multiband Frequency Selective Surface," ETRI Journal, vol. 28, no. 4, Aug. 2006, pp. 506-508. 4. T.K. Wu, "Four-Band Frequency Selective Surface with Double-Square-Loop Patch Elements," IEEE Trans. Antennas Propagat., vol. 42, no. 12, Dec. 1994, pp. 1659-1663. 5. E.A. Parker and A.N.A. El Sheikh, "Convoluted Array Elements and Reduced Size Unit Cells for Frequency-Selective Surfaces," IEE Proceedings, vol. 138, no. 1, 1991, pp. 19-22.
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