METHODS FOR CALIBRATING MICROWAVE IMAGING SYSTEMS
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United States of America Patent
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Jul 26, 2016
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Jul 26, 2016
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Calibration methods for microwave imaging (MI) systems are disclosed. According to an aspect, an MI system has a plurality of Vector Network Analyzer (VNA) ports operatively connected to a plurality of antennas. A multiple state calibration network having predetermined parameters is operatively connected between a first VNA port of the plurality of VNA ports and a first antenna of the plurality of antennas. A method of calibrating the MI system includes determining first, second, and third pluralities of reflection coefficients associated with the plurality of VNA ports using first, second, and third calibration scenarios; removing a measurement effect of the multiple calibration network from the first, second and third pluralities of reflection coefficients; and determining error parameters for each VNA port using the first, second, and third pluralities of reflection coefficients.
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