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<p>In detecting partial discharge (PD) system, the ultrahigh-frequency (UHF) sensor is the primary constituent. In this study, a novel sinusoidally loaded rectangular spiral antenna was simulated. Furthermore, the performance of the simulated design was compared with those of four antennas with radiation surfaces, two feeding baluns, and two reflected back cavities. The antenna had dimensions of 155&#xa0;mm × 85&#xa0;mm × 59&#xa0;mm, with a minimum operating frequency of 450&#xa0;MHz and a relative bandwidth of 147.83% when S<sub>11</sub> was less than or equal to – 10&#xa0;dB. This antenna satisfied the requirements of miniaturization, wide bandwidth, unidirectional radiation, and easy installation for PD detection with stable return loss, large effective bandwidth, and high space utilization rate. The effectiveness and feasibility of the antenna for PD detection were verified through the detection of significant discharge signals in AC discharge simulation experiment.</p>

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A novel rectangular spiral antenna for the detection of ultrahigh-frequency partial discharge

  • 期刊论文

  • 发表日期：

    2025年7月18日

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  • Yuxian Sun,
  • Xuejing Bai,
  • Junqing Yang,
  • Zhenhua Yang,
  • Changyun Li,
  • Ruituo Huai,
  • Hui Wang

摘要

In detecting partial discharge (PD) system, the ultrahigh-frequency (UHF) sensor is the primary constituent. In this study, a novel sinusoidally loaded rectangular spiral antenna was simulated. Furthermore, the performance of the simulated design was compared with those of four antennas with radiation surfaces, two feeding baluns, and two reflected back cavities. The antenna had dimensions of 155 mm × 85 mm × 59 mm, with a minimum operating frequency of 450 MHz and a relative bandwidth of 147.83% when S11 was less than or equal to – 10 dB. This antenna satisfied the requirements of miniaturization, wide bandwidth, unidirectional radiation, and easy installation for PD detection with stable return loss, large effective bandwidth, and high space utilization rate. The effectiveness and feasibility of the antenna for PD detection were verified through the detection of significant discharge signals in AC discharge simulation experiment.