Excitation coupling device for medium-wrapped wire

The invention discloses an excitation coupling device for a medium-wrapped wire. The excitation coupling device is mainly composed of a rectangular waveguide, an epitaxial horn, a square metal guide cavity, a trapezoidal medium guide block and a conical guide block. The excitation coupling device is matched with a power line conductor and a medium through an electromagnetic wave main mode, so thatenergy of an electromagnetic field is injected into the conductor as much as possible; through the design of the square metal guide cavity, the trapezoidal medium guide block and the conical guide block, the main mode electromagnetic energy for guiding electromagnetic waves is concentrated on the surface of the power line conductor and in the medium layer and is transversely transmitted along theconductor, and the effect of information transmission is improved; and moreover, the excitation coupling device has the advantages of being simple in structure, reasonable in design, convenient to use, good in information tra