Measuring electrical field and magnetic field of an antenna with digital magnetometer
Is it possible to measure magnetic field (and/or electrical field) of electromagnetic radiation of an antenna? For example in the vicinity of Bluetooth antenna (2.4GHz).
Can we measure it with digital magnetometer like LIS3MDL from ST?
Theoretically any EM (electromagnetic) field would have an electric-E field and a magnetic-M field, that can be measured somehow.
Magnetic field have the highest magnitude in the reactive near-field of the antenna (in the proximity of the antenna).
Generally the magnetic filed of a dipole, or a monopole, or a patch antenna is low. Those antennas have good far-field EM radiation.
The greatest magnetic field is provided by loop antennas, which usually are not used in Bluetooth communication, due to their poor far-field radiation.
You surely can't measure GHz magnetic field with a kHz bandwidth sensor. If at all, you can measure it with a sense coil small compared to the wavelength.
Similar sense coils are e.g. used in EMC measurements to localize unwanted radiated magnetic fields.