Summary
International Symposium on Antennas and Propagation
2006
Session Number:1A1
Session:
Number:1A1-3
Experimental Results on Ground Wave Propagation over Mixed-Paths
Toru Kawano, Toyohiko Ishihara, Keiji Goto,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
In this paper, we will show the experimental results performed in the Kanto area including the city of Tokyo and the Tokyo bay for the MF and HF ground wave propagation. By receiving the radio waves transmitted from the three different stations, we have measured the electric field strength as the function of the propagation distance. It is clearly observed that the recovery effect is appeared on the sea path propagation over the land-to-sea mixed-path. It is also observed that the anomalous variation with distance and the unexpected attenuation are appeared in the propagation in the high density urban area. By comparing with the theoretical results, we have confirmed that the propagation phenomena observed in the urban area are occurred due to the interference between the conventional Norton ground wave and the slow wave type surface wave.