Rogowski coil is an available device for measuring steep impulse current with a response rise time of ns level. However, it can only work linearly in certain frequency range. This paper describes the measured results of the Rogowski coil made by Xi'an Jiaotong University, to gain a better understanding its frequency characteristics. This paper emphatically introduces the method for measuring frequency response-the method of point frequency and discusses the relevant influence factors, such as the signal generator, standard voltmeter and matching load etc. The measured curve of frequency response and the measured results for various lumped parameters of the Rogowski coil itself have been described.
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