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IEEE Transactions on Antennas and Propagation > 2016 > 64 > 11 > 4859 - 4867
IEEE Sensors Journal > 2013 > 13 > 5 > 1564 - 1570
IEEE Antennas and Wireless Propagation Letters > 2011 > 10 > 123 - 126
IEEE Transactions on Microwave Theory and Techniques > 2010 > 58 > 5-1 > 1159 - 1166