Magnetic Field (B-dot) Sensors

Inductive magnetic field probes, also known as B-dot probes, are used for measuring magnetic fields (H fields). Prodyn H field probes are small to medium-sized high frequency sensors available in the following formats with sensitive areas of up to 0.1 m² or upper 3 dB points of 11 GHz.

ground plane/surface current
radiation hardened

How a B-dot probe works
B-dot sensors generate an output voltage when immersed in a time-changing magnetic field. The operation is based on Faraday’s Law in which time-varying magnetic fields perpendicular to and linking the inductive coil windings induce a voltage proportional to the time derivative of the magnetic field. The voltage output from the probe is measured as voltage across a load impedance – typically 50 Ω.
Output processing
The raw dB / dt -generated probe signal can be time-integrated to provide a local measurement using an analogue integrating circuit or recorded and integrated in post-processing. Please contact us for support with choosing the right sensor and how to interpret the results.
Product Information
The Magnetic field sensors support standards testing for EMC, EMP, HIRF, NEMP etc., including key standards such as:

DEF STAN 59-188
DEF STAN 59-411.

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