A Simulation Research on RF Detection Method for Polymeric Insulator

Nowadays polymeric insulators are widely applied, some internal defects could gradually appear due to various complex circumstances. In this paper, a novel ultra-wideband (UWB) antenna system for fault detection is presented. This technique makes use of the multi-mode transferring theory on dielectric waveguides, where the transmission signal level difference can be employed to detect internal defects in the insulating mandrel. An investigation by simulation is performed with regard to the interfacial mm-ordered cracks in transverse and longitudinal orientations, and approximately 20 ~ 30 dB and 20 ~ 40 dB differences have been observed over the same band 0 ~ 8 GHz, respectively.