Why do the radio antenna bar soft magnetic material, rather than by the hard magnetic materials
You can change with the direction of the magnetic magnetic and free variation is magnetoelectric in different directions can conversion amplification, and hard magnetic material has the characteristics of strong magnetic remanence, does not change with the direction of the free magnetoelectric changes, one direction is enhanced, the opposite direction is weakened.
The radio antenna bar is to magnify the magnetoelectric conversion function, the process of magnetoelectric conversion in the direction is changing, soft magnetic material has no remanence (or weak)
The role of magnetoelectric conversion and amplification in antennas, the electromagnetic wave signal is amplified into weak current signal. I'm afraid of hard magnetic materials with electromagnetic wave without reaction.
