Matching circuit for an apparatus for measurement of electrical fields and apparatus for measuring electrical fields relates to such a circuit

摘要

The capacitive sensor measuring electric field has one hemisphere (10) connected to an input terminal (32) of an adapting circuit. The input branch of the adapting circuit (30) is connected to the input terminal (32) and consists of a resistance (34) and capacitor (36). Active device for adapting impedance (38) is connected between the junction (42) of the input resistor and capacitor (34,36) and the measuring and recording equipment (49). The input impedance is represented by a leakage resistance (44) and the output impedance by a resistance (48) corresponding to a coaxial cable connected to the measuring equipment (49).