DEVICE AND METHOD FOR DETERMINING AN ELECTRICAL PROPERTY OF A SAMPLE

摘要

The device (1) comprises a microwave resonator (coaxial resonator, 2) with at least one outer conductor (3), which has a hollow cylinder (31) with an inner space (32). This inner space is delimited by a lateral wall (33) of the hollow cylinder having an inside diameter (34) and by an end wall (35) of the hollow cylinder having an opening (36). The inventive device is also provided with at least one inner conductor (4) that is placed in the inner space of the hollow cylinder of the outer conductor. This inner conductor is connected in an electrically conductive manner to the outer conductor and has an inner cylinder (41) with an outer diameter (42), and has a tip (43). This tip is connected to the inner cylinder and serves to emit an electric alternating field with a resonance frequency of the microwave resonator. The tip of the inner conductor is situated inside the opening of the end wall of the hollow cylinder in such a manner that a sample, which is to be placed at a sample distance (51) from the tip of the inner conductor, and the alternating field can interact so that the resonance frequency of the microwave resonator depends on the property of the sample. A ratio consisting of the inner diameter of the hollow cylinder of the outer conductor and of the outer diameter of the inner cylinder of the inner conductor is selected such that a quality of the microwave resonator is less than a maximum quality of the microwave resonator that can be adjusted by the ratio of the diameters. This measure increases the sensitivity of the device. The device is used for determining the electrical property of a sample. The device and the method are used in HTE (High Throughput Experimentation) for characterizing combinatorial material libraries.