Analysis of Offshore Propagation Characteristics of Oscillating Magnet Based Mechanical Antenna

The offshore surface propagation characteristics of an Oscillating Magnet Based Mechanical Antenna (OMBMA) is analyzed in this paper. The equivalent oscillating magnetic dipole model of OMBMA is analyzed, and the Sommerfeld expression of the electromagnetic radiation field of the vibration magnetic dipole is given. The semi-infinite two-layer dielectric propagation model of the horizontal vibration magnetic source under the sea surface is established. The propagation path of the electromagnetic field and the field strength at the receiving point are analyzed theoretically. Finally, the propagation characteristics of OMBMA with the operating frequency of 1000Hz near the sea surface are verified by simulation. It is found that when the sum of the depth of the receiving point and the source point is fixed, the attenuation characteristics of the radiation field intensity are the same at different depths of the source point or the receiving point. When the distance between the receiving and the source points exceeds a certain horizontal distance, the magnetic field intensity at the receiving point will decrease rapidly.