Totally-enclosed calibratable magnetic ring impedance measurement clamp and magnetic ring impedance measurement method

Abstract

The invention provides a totally-enclosed calibratable magnetic ring impedance measurement clamp. The magnetic ring impedance measurement clamp comprises a metal shell, and insulating support pieces and a metal coaxial core wire which are positioned in the metal shell, and the whole clamp is of a coaxial structure; the metal shell is divided into a part A shell and a part B shell; the two ends of the metal shell are respectively provided with an electrical connector; the insulating support pieces are correspondingly divided into a first insulating support piece and a second insulating support piece which are respectively and fixedly arranged in the part A shell and the part B shell, and a space for mounting a to-be-tested magnetic ring is reserved at a position close to the butt joint position of the shell; and the metal coaxial core wire penetrates through the first insulating supporting piece and the second insulating supporting piece and is correspondingly connected with the electrical connectors arranged at the two ends of the metal shell. According to the invention, a totally-enclosed coaxial structure is adopted, so that the influence of high-frequency parasitic capacitance and leakage inductance on a measurement result is avoided; and meanwhile, the coaxial structure is stably limited, so that the accuracy and the consistency of the impedance of the magnetic ring during high-frequency measurement can be improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility, and relates to a magnetic ring impedance measurement fixture and a magnetic ring impedance measurement method. Background technique [0002] The continuous wave radiation test method is a low-level test method that can be tested on large and / or fixed installations to understand the response characteristics of the system to electromagnetic field signals. IEC 61000-4-23 introduces the methods, steps and test equipment for continuous wave testing. As a continuous wave radiation test device, the elliptical radiator has a large radiation range and good low-frequency response, and is a continuous wave radiation test device with better performance. [0003] The elliptical radiator achieves impedance loading through the magnetic ring and the resistance wound on the magnetic ring, and obtains an electromagnetic field similar to a plane wave in the working area. The impedance charac...

AI Technical Summary

Problems solved by technology

However, in order to obtain more accurate complex permeability measurement results below 400MHz, this measurement method still requires separate measurement and compensation of stray parameters

At the same time, since the inductance measurement method does not have a special fixed connection device, it is necessary to rewind or connect the coil on the magnetic ring every time it is measured, and it is difficult to ensure the consistency of the coil connection. Large changes in impedance will affect the consistency and stability of the measurement results

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