Finding an Optimal Sample Size and Placement for Measurement of Relative Permittivity using a Microstrip Ring Resonator

In this paper, a thorough analysis of an optimal measured sample size and placement over the surface of a microstrip ring resonator (MRR) is conducted using a full-wave software and respective measurements using a vector network analyzer as well as a suitable analytical model to compute the unknown value of relative permittivity of a material under test. Using this systematic approach, we present our findings regarding the optimal sample-under-test size and placement over the surface of an MRR.