Ground Wave Propagation in an Inhomogeneous Atmosphere over Mixed-Paths(Radiation and Propagation,<Special Section>Recent Progress in Electromagnetic Theory and Its Application)
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概要
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In this paper, we have derived the new solution for the medium-frequency and the high-frequency ground wave propagation in a surface duct over mixed-paths. We have shown newly that the solution for the ground wave propagation in a standard atmosphere can be obtained directly from the solution for the surface duct problem by applying the analytic continuation from the negative equivalent radius of curvature of the earth to the positive one. Through the theoretical and experimental studies, it is confirmed that the radio wave propagating over the sea in the land-to-sea mixed-paths is enhanced by the recovery effect. It is clarified that the ground wave is also enhanced in the surface duct in a long range propagation. It is shown that the unexpected attenuation and the anomalous variation with distance are appeared in the propagation in the urban area due to the emergence of the slow-wave type trapped surface wave.
- 社団法人電子情報通信学会の論文
- 2007-02-01
著者
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Goto Keiji
Dep. Of Communication Engineering National Defense Acad.
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Goto Keiji
Department Of Communication Engineering National Defense Academy
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Goto Keiji
Department Of Anesthesiology And Resuscitology Okayama University Graduate School Of Medicine Dentis
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KAWANO Toru
Department of Communication Engineering National Defense Academy
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ISHIHARA Toyohiko
Department of Communication Engineering National Defense Academy
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