Magnetic sensor coil shape geometry and bandwidth assessment

There are quite many scientific examples out there regarding on-line measurements of fast pulses and fast partial discharge phenomena using magnetic sensor coils. In these examples, most attention has been paid on the results obtained with specific design of magnetic sensor. There is though a lack of actual design consideration of the sensor regarding its target bandwidth and sensitivity. In current paper the focus is put on the design aspects of such a magnetic loop sensor. Geometrical shape of the magnetic sensor loop is considered and coils with different shapes are put into tests to determine their real parameters.