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Journal of Sensors
Volume 2014 (2014), Article ID 839386, 8 pages
http://dx.doi.org/10.1155/2014/839386
Research Article

Design of a UHF Antenna for Partial Discharge Detection of Power Equipment

State Key Laboratory of Power Transmission Equipment & System Safety and New Technology, Chongqing University, Chongqing 400044, China

Received 23 July 2014; Revised 25 September 2014; Accepted 29 September 2014; Published 15 October 2014

Academic Editor: Tao Zhu

Copyright © 2014 Youyuan Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A single-arm Archimedean spiral antenna that can be directly fed by a 50  coaxial cable is investigated in this study. Every antenna parameter is optimized under simulation to make the antenna work in the ultra-high frequency band. The influence of dielectric materials, feed cone angle, and antenna duty ratio is also examined. Partial discharge (PD) experiments on several typical artificial insulation defects are conducted, and a single-arm Archimedean spiral antenna and a typical microstrip antenna are utilized for PD measurement. The PD characteristics of different insulation defects are also analyzed. Results show that the designed antenna is suitable for ultra-high frequency monitoring. The detection sensitivity of the single-arm spiral antenna is superior to that of the ordinary microstrip antenna. The former can be utilized in wide-band measurement fields.