Abstract: A device is described for measuring a parameter of living tissue, in particular a glucose level, which parameter affects a response of said tissue to an electric field. The device comprises a substrate (2), which carries a ground electrode (10) as well as a plurality of signal electrodes (12a, 12b, 13a-13c, 14). The gaps (15) between the ground electrode and the signal electrodes are filled with a solid filler material (16) in order to provide an even surface. Optical reflection detectors (23a, 23b, 23c) can also be located in these gaps in order to avoid field distortions and obtain a compact design. The backside of substrate (2) carries electronic high-frequency components for improving signal quality.

Abstract: A device is described for measuring a parameter of living tissue, in particular a glucose level, which parameter affects a response of said tissue to an electric field. The device comprises a substrate (2), which carries a ground electrode (10) as well as a plurality of signal electrodes (12a, 12b, 13a-13c, 14). The gaps (15) between the ground electrode and the signal electrodes are filled with a solid filler material (16) in order to provide an even surface. Optical reflection detectors (23a, 23b, 23c) can also be located in these gaps in order to avoid field distortions and obtain a compact design. The backside of substrate (2) carries electronic high-frequency components for improving signal quality.

Abstract: The device measuring a parameter p that depends on the real and/or imaginary parts of the permittivity of body tissue operates at a frequency f where a temperature change affects the permittivity of free water only weakly. If the parameter p depends on the real part of the permittivity only, the frequency f should be between 6.2 and 10.1 GHz. If the parameter p depends on the imaginary part of the permittivity only, the frequency f should be between 25.5 and 36 GHz. If parameter p depends on the real and imaginary parts of the permittivity, the derivative of the parameter in respect to the real and imaginary parts of permittivity can be used to calculate an optimum frequency range.

Abstract: A device for the non-invasive measurement of a glucose level, body hydration or another characterizing parameter of body tissue comprises at least two coplanar waveguides arranged on a common support. An AC signal is applied to the first ends of the coplanar waveguides, and the signal arriving at the second end is measured. The coplanar waveguides have differing gap widths, such that their electric fields have different reach into the body tissue. This allows obtain depth resolved information about the permittivities of individual tissue layers and to obtain more accurate results.

Abstract: In a method for characterizing skin treatment agent, a device having several sets of electrodes is applied to the skin. The electrode sets have differing electrode distances, such that fields having different reach can be generated. Inverse profiling is used to calculate the dielectric permittivities of individual skin layers, which in turn allows to observe the water transport mechanism in the skin. These transport mechanisms can be used to assess the effect of the agent on the skin. An advantageous device for implementing this method comprises coplanar waveguides for generating the fields.