Design of new shape of bowtie antenna with edge modification for UHF partial discharge measurement

Detection partial discharge (PD) using the Ultra High Frequency (UHF) has proven its worth in monitoring the condition of insulation of GIS. UHF PD detection method has some advantages compared with conventional PD detection methods such as IEC standards 60270. This research uses UHF bow-tie antenna sensor to detect PD in GIS. In the initial design phase, the geometry of the antenna would be firstly optimized in order to obtain the optimum antenna characteristics, i.e. its gap distance, wing radius and flare angle. The antenna would be tested by using a vector network analyzer (VNA).