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Electronics Letters > 2016 > 52 > 5 > 372 - 374
2010 IEEE MTT-S International Microwave Symposium > 1696 - 1699
IET Microwaves, Antennas & Propagation > 2010 > 4 > 9 > 1275 - 1282
IEEE Microwave and Wireless Components Letters > 2007 > 17 > 11 > 778 - 780