B-dot and D-dot field sensors

These derivative sensors are small receiving monopole or dipole antennas that deliver an output signal proportional to the variation of the electromagnetic field strength. They are widely used for real time measurement of fast electric or magnetic field transients, particularly in relation with high-power electromagnetic immunity tests.

Ground plane sensors are monopole antennas. Free space sensors are dipole antennas and shall be connected to a balun combining the signals from both antenna arms to one single output connector.

The output electrical signal shall be integrated to recover the measured electromagnetic transient. This integration can either be done by one of the passive integrators montena has developed, or by means or a mathematical integration. Montena PULSELab software application has been especially developed to ease the measurement of electromagnetic transients with derivative sensors. It includes that numerical integration capability.

For measurements free from interferences, we strongly recommend the use of our fibre optic links.