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A sensor array concept has been developed using microstrip-line-excited split-ring resonators (SRRs). With this structure it is possible to spatially resolve the dielectric properties of a Material Under Test (MUT). The SRRs are designed to have different resonant frequencies and are decoupled from each other to indicate the dielectric properties of the MUT and its location within the array. Several prototype sensors have been realized and tested to prove the concept.

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