Modal analysis of indoor wave propagation in corridors and tunnels / Hany Mahmoud Mohamed Elmaghrabi ; supervised Mostafa Elsaid Mostafa , Samir Fahmy Mahmoud , Ahmed Mohamed Attiya

Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Electronics and Communications Engineering

Modeling wave propagation for indoor wireless communication and tunnels is a challenging problem because of the large dimensions compared with the operating wavelength and complex geometry of buildings. However, understanding how electromagnetic waves propagate in indoor environments and tunnels becomes increasingly in demand as wireless devices become more involved in daily lifestyle. In this research, a model is presented to simulate wave propagation in indoor environment. The proposed model is based on combination of modal analysis, dyadic Green{u2019}s function, mode matching method and generalized scattering matrix. A new approach to simulate the effect of imperfectly conducting walls for short corridor sections is proposed. This approach is based on approximating the fields inside the space of the actual waveguide section by an equivalent waveguide section of larger dimensions with PEC (Perfect Electric Conductor) walls. Modal analysis for long straight corridor sections and tunnels is proposed based on constant impedance surface approach. This approach is based on assuming that the boundaries of the tunnel section are constant impedance surfaces as the surface impedance of the wall is almost independent of the angle of the wave incidence onto the wall

Issued also as CD