A method of direction finding for dispersive electromagnetic pulses

Electronics and Communications in Japan (Part I: Communications) Pub Date : 2007-01-08 DOI:10.1002/ecja.20327

Minoru Tsutsui, Shigeo Konagaya, Tadayoshi Kagawa

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引用次数: 14

Abstract

A new measurement method which can determine the direction of arrival of a pulse electromagnetic wave with frequency dispersion characteristics has been developed. The direction of arrival is determined by conventional data analysis for an electric field component and two magnetic field components. The sensor system is composed of a vertical dipole antenna and two search coils oriented in perpendicular directions in the horizontal plane. The major part of the analysis of the detected signal is composed of the derivation of the spectrum with frequency dispersion from the pulse waveform and the calculation of the direction of arrival from the amplitude and the phase obtained for each frequency in the dispersion characteristics. By the proposed method, the direction of arrival can be determined even when a frequency-dependent delay is produced in propagation (frequency dispersion). The method is applied to lightning discharge pulses, and it is shown that the direction of arrival can be determined with high accuracy. Thus, the method can be used for continuous observation. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 90(5): 23–32, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20327

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色散电磁脉冲测向方法

提出了一种确定具有频散特性的脉冲电磁波到达方向的新测量方法。到达的方向是通过对一个电场分量和两个磁场分量的常规数据分析确定的。该传感器系统由一个垂直偶极子天线和两个在水平面上垂直方向的搜索线圈组成。检测信号分析的主要部分是从脉冲波形中推导出具有频散特性的频谱，并从频散特性中得到的各频率的幅值和相位计算出到达的方向。通过提出的方法，即使在传播过程中产生频率相关的延迟(频散)，也可以确定到达的方向。将该方法应用于雷电放电脉冲，结果表明，该方法能较准确地确定雷电放电脉冲的到达方向。因此，该方法可用于连续观测。©2007 Wiley期刊公司电子工程学报，2009,31 (5):393 - 398;在线发表于Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002 / ecja.20327

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Electronics and Communications in Japan (Part I: Communications)

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