Schwarzbeck HFRAE 5162 Passive Magnetic RX Loop Antenna

The Loop Antenna for magnetic fields was designed for medium to high-level fieldstrengths in the frequency range 50 kHz (10 kHz) to 30MHz. The application is without problems due to the passive structure without electronic components or power requirements: H fields from 20 dBµA/m on are indicated with test receivers (50 ohm input, calibration in dBµV) or, with slightly less sensitivity, with spectrum analysers. Add the log. antenna factor from the table ( k H ) to the dBµV reading of the receiver to obtain the magnetic field-strength level in dBµA/m.

For high field-strengths broadband voltmeters with 50 Ω input resistance (also power meters - observe overload risks) may be used. Voltage or power readings must be converted to voltage levels in dBµV (20 x log U [µV]). Add the log. antenna factor k H from the calibration table to obtain the magnetic field-strength level in dBµA/m.

If FAR-FIELD measurements are intended in units of dBµV/m, read the voltage level in dBµV across 50 Ω and add the E field antenna factor k E from the table (it is 51.5 dB higher and provides the "fictitious E field level" in dBµV/m ).