Article: La Sapienza University details research in antennas and propagation.

"A high-frequency field prediction model, useful to evaluate the radio wave propagation in realistic tunnels having rectangular cross-section, is presented. The model is based on a hybrid implicit/explicit finite-difference numerical scheme adopted to solve the vector parabolic equation (V-PE) governing the electromagnetic field propagation in straight and curved tunnels," scientists writing in the journal IEEE Transactions on Antennas and Propagation report.

"To model the materials forming the-tunnel walls, mixed Dirichlet-Von Neumann boundary conditions are employed. In this way, all the relevant field propagation processes are properly taken into account. To ...

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