A Temporal Millimeter Wave Propagation Model for Tunnels Using Ray Frustum Techniques and FFT

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="172924.fig.003a" src="https://static-preview.hindawi.com/articles/ijap/volume-2014/172924/figures/172924.fig.003a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Top view</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="172924.fig.003b" src="https://static-preview.hindawi.com/articles/ijap/volume-2014/172924/figures/172924.fig.003b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Photograph of the test site</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="172924.fig.003c" src="https://static-preview.hindawi.com/articles/ijap/volume-2014/172924/figures/172924.fig.003c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Cross section</td></tr></table></td></tr></table>

<table>Dimension of a tunnel used to measure propagation loss.</table>

International Journal of Antennas and Propagation

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Figure 3

Figure 3: A Temporal Millimeter Wave Propagation Model for Tunnels Using Ray Frustum Techniques and FFT 