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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 1, page. 199 - 201, 2007-01
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ELECTROMAGNETICS, vol. 26, no. 3-4, page. 203 - 218, 2006-04
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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 43, no. 6, page. 462 - 467, 2004-12-20
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ELECTRONICS LETTERS, vol. 39, no. 1, page. 15 - 17, 2003-01-09
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 29, no. 4, page. 276 - 280, 2001-05-20