Ultra wideband current sensor

Purpose. A current meter based on the principle of electromagnetic induction is designed to register the current flowing in the lightning rod. The aim of the article is to describe the way of increasing the sensitivity. Methodology. The meter is used for measuring the current pulses with a rise time of 5 ns to 50 ns. If compared with other methods, meters based on the principle of electromagnetic induction have several advantages, such as simplicity of construction, reliability, low cost, no need in a power source, high sensitivity and absence of electrical contact. Also the meter responds to a narrow bandwidth and noise cannot penetrate into the electrical circuit, which is connected to the meter. Originality. Series connection of converters has the property of a long line when influenced by the pulses of the nanosecond range. The level of the transient response of the meter is calculated. The influence of parasitic parameters on the type of meter transient response is examined. The shown construction was not previously described. Practical value. The results of meter implementation are given. The design peculiarities of such measuring instruments are shown. Applying such a structure is only possible when measuring the nanosecond signals or less. Otherwise the property of a long line disappears.