Abstract: The transmitting coil in the aviation electromagnetic transmitting system was took as the research

object，considered the influence of the parameters of the transmitting coil on the peak value of the transmitting current，used finite element software，the coil model was established. The skin effect and proximity effect caused by the alternating current on the coil parameters were focused on the analysis.When aluminum tubes are replaced with practical conductors of the same outer diameter，material utilization can be improved. At the same time，a hollow multi-turn coil structure was proposed to save space，and the change trend of AC resistance and inductance of the coil at different turn-to-turn distances were obtained through simulation. It verified that the coil structure can effectively reduce theAC resistance and inductance of the coil through the appropriate turn-to-turn distance，thereby reducing the AC loss generated under the alternating current and increasing the peak value of the transmitting current. In engineering practice，the transmitting coil was manufactured and the experiment was performed to obtain the current peak value that meets the launch requirements，which improves the ability to detect deep resources.

      Key words: aviation electromagnetic ；transmitting coil ；AC resistance ；skin effect ；proximity effect