Experimental proof that fluxgates operation is directly related to electric antennas theory

The relationship existing between the open circuit terminal voltage of a dipole antenna and the intensity of the surrounding field is well known. A magnetic structure whose properties are similar is obtained by replacing the pair of the dipole conducting arms by a pair of highly permeable ferromagnetic arms. As a result, an MMF whose features are similar to those of the open circuit voltage appears across the gap between the arms. Our experiments demonstrate that this MMF is related to the magnetic structure length and surrounding field in the same way that the electric open circuit voltage is related to the dipole length and surrounding field. Furthermore, a relatively long fluxgate magnetometer was developed. It assisted in demonstrating that the measured field related flux and the magnetometer output signal are directly proportional to a gap MMF related value. In addition, a new approach has been discovered for relating the fluxgate magnetometer output signal to the surrounding field intensity in cases where the measured field is non-uniform.