Have fun: It's sorta like this: The H field strength used to be measured in oersteds.

H represents the "magnetic field strength". B is the density of the flux lines, M is magnetization of any material inside the H field. B is the induction and H is the field generating the induction. M would be the magnetic force induced in the material. H is measured in amperes per meter, B by number of lines per unit of measurement, and M could be joules or amperes per meter.

M would be what exists within the antenna. So given an H-field of a certain strength crossing an inductive material of a certain density/permeability would create a B field of so many lines, which would induce an M energy of so many joules or amperes. More or less.

Work it all backwards for a transmitter. More or less.

Now .... "Leave Brittany Alone!"....