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International Journal of Antennas and Propagation
Volume 2014, Article ID 985697, 7 pages
http://dx.doi.org/10.1155/2014/985697
Research Article

A Rectangular Planar Spiral Antenna for GIS Partial Discharge Detection

1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
2Xinjiang Electric Power Research Institute, High-Tech Industrial Development Zone, Urumqi 830000, China

Received 5 March 2014; Revised 3 May 2014; Accepted 11 May 2014; Published 5 June 2014

Academic Editor: Wenxing Li

Copyright © 2014 Xiaoxing Zhang 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 rectangular planar spiral antenna sensor was designed for detecting the partial discharge in gas insulation substations (GIS). It can expediently receive electromagnetic waves leaked from basin-type insulators and can effectively suppress low frequency electromagnetic interference from the surrounding environment. Certain effective techniques such as rectangular spiral structure, bow-tie loading, and back cavity structure optimization during the antenna design process can miniaturize antenna size and optimize voltage standing wave ratio (VSWR) characteristics. Model calculation and experimental data measured in the laboratory show that the antenna possesses a good radiating performance and a multiband property when working in the ultrahigh frequency (UHF) band. A comparative study between characteristics of the designed antenna and the existing quasi-TEM horn antenna was made. Based on the GIS defect simulation equipment in the laboratory, partial discharge signals were detected by the designed antenna, the available quasi-TEM horn antenna, and the microstrip patch antenna, and the measurement results were compared.