N.T wrote:
How to collect the energy in the receivers coil?

A periodic impulses pass thru the wire, differences of potential will be created along the same as well as at right angles to it in the surrounding medium and either of these may be usefully applied. Thus at a, a circuit comprising an inductance and capacity is resonantly excited in the transverse, and at b, in the longitudinal sense.
At c, energy is collected in a circuit parallel to the conductor but not in contact with it, and again at d, in a circuit which is partly sunk into the conductor and may be, or not, electrically connected to the same.
It is important to keep these typical dispositions in mind.
The description is so explicit.
Jagau
What we consider to be empty space is merely a manifestation of unawakened matter. N.T.