How the Weak Electromagnetic Field of the Brainwave can be Amplified at a Distance
The electromagnetic theory is well defined and there is no mystery to amplify an electromagnetic field, irrespective of any radiating source, even the weak electromagnetic field generated by the brain wave, at the distance.
In short, it is only necessary to increase the amplitude of the signal to increase power, and this can be done using a physical principle of wave theory called constructive superposition.
By electromagnetic theory, the power of a signal is defined as a function of the square root of the amplitude rms. And the intensity of a signal is defined as the power for the unit area.
Thus, it is only necessary that a signal, of the same phase and higher power, interact with the brain wave electromagnetic field so that the electromagnetic interference of the brain has enough power to get through the nearest receiver, as a cellular antenna.
After this, the signal can be processed and physiological data present in brain wave activity obtained including signals P300.
Note that the neural structure of the brain stem works as an antenna with a variable electric field. All sensory nerve impulses arrive in the brain through the thalamus, which is the integrator unit and oscillatory unit of the brain. These nerve impulses create electric fields variables with thalamic frequency, the unique frequency of each brain. Note that the nerve impulse, first arrives in the thalamus, and only then it is sent to the brain area, responsible for that boost to processing in the brain.
By electromagnetic theory, electric fields variable produce magnetic fields induced. This brain magnetic fields are amplified at a distance, by constructive superposition, and thus has enough power to get through the nearest receiver, as a gwen tower, for demodulation of the brain signal.
The Malech’s patent (US3951134 - Remotely monitoring and altering brain waves) uses this principle, but it is more accurate because generates two signals of different frequencies, that interfere with brain electromagnetic field, and the resultant of these three sources is amplified, so can arrive at the receiving antenna. As the three frequencies are known it only needs to process the signal to take target brain’s EEG.