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IEEE Microwave and Wireless Components Letters > 2011 > 21 > 6 > 305 - 307
IEEE Microwave and Wireless Components Letters > 2010 > 20 > 1 > 55 - 57
IEEE Microwave and Wireless Components Letters > 2011 > 21 > 6 > 305 - 307
IEEE Microwave and Wireless Components Letters > 2010 > 20 > 1 > 55 - 57