Abstract
In this paper, we present the modeling of the microstrip ring resonator (MRR) for
wireless applications. The proposed MRR is designed to operate at 5.8 GHz using a combination of
two sub-wavelength (λ/4) bent MRRs together with two (λ/8) arms to form a half ring of
λ/2 in length. The combined structure is excited by an end-coupled transmission line in such a way
as to center couple the two half rings. The entire structure is modeled numerically using an
equivalent circuit that was derived, and hence characterized with the aid of the 2D equivalent
circuit modeler. The effects of the various gap capacitances on the reflection coefficients,
insertion
loss, resonant frequency and bandwidth are investigated.