In the top drawing on this slide, we show a normal transmitter putting out a normal EM wave, which received in a normal antenna/receiver.  What we call a "transverse" wave rigorously exists only in the electron gas in the transmitting antenna and in the electron gas in the receiving antenna.  Specifically, a longitudinal wave exists in the vacuum in between the two antennas.  However, due to the method of production, the longitudinal wave contains spin-holes for electrons, so the electrons in the receiving antenna readily couple with the wave by falling into and meshing their spins with the spins of the spin-vortex holes.  Electron precession produces electron gas waves that are transverse oscillatory, hence Hertzian waves in nature. 
          In the bottom drawing, we show a translator/transmitter.  In other words, we oppose ordinary EM waves in a sum-zero substructure, deliberately producing longitudinal EM waves in vacuum with the spin-hole vortexes canceling each other.  This type of wave does not "hook" spinning electrons in the normal receiving antenna, and thus it is not detected.  The normal antenna/receiver system never sees it at all. 
          However, by means of a special antenna which generates nonlinear phase shifts in the composite substructure waves, "hooking" holes are restored in an oscillatory nature.  Electrons then hook with this output and detect the wave. 
          Note that it requires a two-stage detector, operated in an interferometer fashion, to detect this pure scalar wave. 

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