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Submitted on: 28 August 2016.
Revised on: 03 December 2016.
Accepted on: 22 January 2017.
___________________IEEE Antennas and Wireless Propagation Letters
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Submitted on: 22 March 2008.
Revised on: 22 April 2008.
Accepted on: 05 May 2008.
___________________IEEE Antennas and Wireless Propagation Letters
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Submitted on: 07 March 2000.
Revised on: 24 May 2000.
Accepted on: 16 June 2000.
___________________IEEE Antennas and Wireless Propagation Letters
Submitted on: 31 May 2005.
Revised on: 22 September 2005.
Accepted on: 16 October 2005.
___________________IEEE Antennas and Wireless Propagation Letters