Tesla is a brilliant physicist, in fact he is considered the Father of Modern day Electrical Engineering; however he was an Applied Physicist (as am I), not Theoretical Physicist, as is Elon Musk (started his PhD at Stanford) (Tesla Motors) as well as was Michael Faraday who I have a “Design Rule” in my book on Faraday’s cage. A Faraday cage or Faraday shield is an enclosure formed by conducting material or by a mesh of such material. Such an enclosure blocks external static and non-static electric fields by channeling electricity through the mesh, providing constant voltage on all sides of the enclosure. Since the difference in voltage is the measure of electrical potential, no current flows through the space. The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage. This is why long haul truckers often get tickets for toll booth violations (case study in my book). Their transponders cannot communicate with the receivers at a toll both because the Polyvinyl butyral or PVB (a layer of resin) has had no relief opening (a hole, basically) to let the signal pass through. Most passenger car windshields have this option. It is primarily based on volume.
Tesla’s work on Theoretical Physics was limited to Non Hertzian Wave.