Patrik Gebhardt

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Electrical impedance tomography (EIT) is used to determine the spatial conductivity distribution of a measurement environment, what involves several applications in the area of process engineering or medical science. In common systems a measurement environment is usually stimulated by defined current patterns in a serial time-multiplexing manner. Higher(More)
A method for the calibration of an ultra-wideband microwave tomography system is presented. The objective for this measurement system is to calculate the spatial distribution of the dielectric parameters and thereby different materials. Scattering parameters are used to describe the setup and are given to the reconstruction algorithm for evaluation. The(More)
Electrical impedance tomography (EIT) is used to determine the spatial conductivity distribution of a measurement environment that involves several applications in the areas of process engineering and medical diagnostics. In common EIT systems, the measurements are performed by means of current patterns which are injected into the measurement environment(More)
A new method for the calibration of a multiport microwave tomography (MWT) system measured with a 2-port vector network analyzer (VNA) is presented. The two VNA ports are mapped to the eight input ports of the MWT system by means of a switching network. This contribution deals with the calibration of the switching matrix. In consideration of the(More)
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