Determining the conductivity and relative permittivity of fluids in microwave frequencies using waveguide structures

摘要

Dielectrics play in many telecommunication and sensor applications a significant role. The interaction between electromagnetic fields with the dielectrics can change the characteristics of both of them. In order to set up the system correctly, the knowledge about the field distributions and the material constants is very important. With the help of a waveguide structure, some material characteristics of fluids will be measured. The measurement is done indirectly through the so-called scattering parameters of the propagating electromagnetic waves at the ports. We simulate analytically and numerically several conditions to get some preliminary results for getting some initial information for next observations.