地下街等の基本的な分岐をもつ方形トンネル内の電波伝搬特性 : 放送現業 : 無線・光伝送

抄録

Mobile stations are widely spreading in recent information societies. However some difficulties occur when they are used in an underground building. Electromagnetic wave decays more rapidly in a tunnel than in the free space. In this paper, we perform an experiment based on the microwave simulation and compare the experimental results with an approximate solution in oder to investigate how electromagnetic waves propagate in rectangular cross-type and multi-cross-type tunnels. Present results give some important knowledges for mobile communications in the complicated underground buildings.