Analysis of multilayered microstrip and its application for designing microstrip moisture sensor

This paper presents a unified approach to the analysis of the shielded microstrip with multilayered dielectrics, using a variational technique in the Fourier transform domain. The analysis involves the calculation of the effective dielectric constant, characteristic impedance and dielectric loss of this system. The application of this approach for the development of a microstrip moisture sensor is presented. A rigorous general procedure for determination of the potential function using the transfer matrix approach has been developed. Interesting theoretical results are obtained from the analysis where effective dielectric constant, characteristic impedance and dielectric loss of the sensor are drastically effected by the thickness of the covering layer