IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 18, no. 8, page. 536 - 538, 2008-08
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 18, no. 7, page. 485 - 487, 2008-07
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 16, no. 12, page. 690 - 692, 2006-12
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 53, no. 2, page. 786 - 793, 2005-02