电晕放电辐射信号特征研究

Research on Characteristics of Signal Radiated From Corona Discharge

在背景噪声研究的基础上，利用放电针对电晕放电辐射信号进行了实验研究。分析了不同因素（包括不同极性和大小的电压、天线的极化方向、接收距离、放电针的形状、温湿度等）对电晕放电辐射信号波形和频谱的影响。实验表明，电晕放电辐射信号波形具有陡峭的前沿，上升时间从几纳秒到二十几纳秒；频谱成钟型连续谱，主要集中在20～100MHz；极性不同，信号波形不同；电晕放电辐射场一般为垂直极化；辐射强度与接收距离成反比关系；相对湿度不同，信号幅值不同。

The back noise is researched, the experimental research on characteristics of signal radiated from corona discharge is done. The effect of different factors, which includes different polarity of potential, direction of polarization of antenna, receiving distance, the shape of discharging needle, temperature and humidity etc,on the waveform and spectrum of signal radiated from corona discharge. According to the experiment, it concludes that the waveform of signal has a steep rising edge; the spectrum of signal radiated from corona discharge is continual spectrum, which frequency range is from 20MHz to 100MHz; when the polarity is different, the waveform of signal is different; the politicization mode of fields is vertical; the intensity of fields radiated from corona discharge is inversely proportional to the receiving distance;the relative humidity is different, the amplitude of signal is different, the higher the relative humidity is, the higher the amplitude is.