Disclosed are a method of manufacturing a composite bushing and a diagnostic system for the partial discharge of the composite bushing that may provide a thin-film ultra high frequency sensor to a composite bushing, thereby measuring a partial discharge of a composite bushing and preventing a safety accident of the composite bushing that may occur due to the partial discharge. Also disclosed are methods of using the chemical entities to treat disorders such as cancer. Moreover, at least the input element is produced from a material obtained by a sintering process.