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IEEE Transactions on Microwave Theory and Techniques > 2011 > 59 > 6 > 1539 - 1551
IEEE Spectrum > 1969 > 6 > 5 > 36 - 45
IEEE Transactions on Microwave Theory and Techniques > 2011 > 59 > 6 > 1539 - 1551
IEEE Spectrum > 1969 > 6 > 5 > 36 - 45