Submitted on: 14 May 2010.
Revised on: 08 September 2010.
Accepted on: 31 October 2010.
___________________Journal of Electromagnetic Engineering and Science
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Submitted on: 25 June 2009.
Revised on: 08 October 2009.
Accepted on: 21 October 2009.
___________________Journal of Electromagnetic Engineering and Science
Submitted on: 21 May 2005.
Revised on: 11 August 2005.
Accepted on: 01 October 2005.
___________________Journal of Electromagnetic Engineering and Science