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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-04-10
Electromagnetic Field of a Horizontal Infinitely Long Magnetic Line Source Over the Earth Coated with a Dielectric Layer
By
Yongjian Zhi,

    Dr. Yongjian Zhi

    School of Electrical Engineering

    Zhejiang University

    China

    Homepage

Ji En Ma,

    Dr. Ji En Ma

    School of Electrical Engineering

    Yuquan Campus, Zhejiang University

    China

    Homepage

You-Tong Fang,

    Dr. You-Tong Fang

    College of Electrical Engineering

    Zhejiang University

    China

    Homepage

Kai Li

    Prof. Kai Li

    Department of Information Science & Electrionic Engineering

    Zhejiang University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 31, 55-64, 2012
doi:10.2528/PIERL12021314 | Google Scholar

Abstract
In this paper, the electromagnetic field of a horizontal infinitely long magnetic line source over the dielectric-coated earth is treated analytically, and the complete approximate solution for the radiated field under the far-field conditions is outlined. The total field is composed of four modes: the direct wave, the ideal reflected wave or image wave, the trapped surface wave, and the lateral wave. In particular, the complete analytical formulas are obtained for both the trapped surface wave and the lateral wave. The trapped surface wave is determined by the sum of residues of the poles. When the infinitely long magnetic line source or the observation point is away from the planar surface of the dielectric-coated earth, the trapped surface wave deceases exponentially in the z direction, and the total field is determined primarily by the lateral wave. When the conductivity of the earth is large, and both the infinitely long magnetic line source and the observation point are on or close to the air-dielectric boundary, the total field is determined primarily by the trapped surface wave.
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Citation
Yongjian Zhi, Ji En Ma, You-Tong Fang, and Kai Li, "Electromagnetic Field of a Horizontal Infinitely Long Magnetic Line Source Over the Earth Coated with a Dielectric Layer," Progress In Electromagnetics Research Letters, Vol. 31, 55-64, 2012.
doi:10.2528/PIERL12021314
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