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Six-Port microwave interferometers are a low-cost as well as low-power type of radar sensor with a high phase accuracy, which can be used for precise displacement measurements. Near field effects strongly influence the signal characteristics of a reflection of the electromagnetic wave near the antenna, especially if the target is low reflective. In this paper a calibration procedure based on phase...
In this paper an improved calibration procedure for six-port based displacement measurement radar is proposed. The entire system characterization is done only using several measurements of the target at known positions and no additional calibration standards are required. The proposed calibration has been experimentally verified for a six-port based displacement measurement radar operating at 24 GHz...
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