SURFACE IMPEDANCE MEASUREMENT DEVICE

摘要

A surface impedance measurement device comprises a transmitting electrode producing a magnetic field in the area surrounding a material to be tested and a receiving electrode receiving the magnetic field. An electric voltage wobbled in frequency is applied to the transmitting electrode, and a circuit measures the voltage at the terminals of the second electrode. For the electrodes to be applied on the same side of the material to be tested and of which the surface impedance is to be measured, the electrodes are superposed by the intermediary of a dielectric wedge in a compact probe. The impedance measurements are then independent of the dimensions and geometry of the material.