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:
- ground plane/surface current
- radiation hardened
…with sensitive areas of up to 0.1 m² or upper 3 dB points of 11 GHz
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.
The raw dB / dt -generated probe signal can be time-integrated to provide a local measurement using an analog integrating circuit or recorded and integrated in post-processing.
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