Abstract
For the design of microstrip line coupled dielectric resonator filters, the coupling coefficient between two dielectric resonators is required. Although research has been done on the coupling of circular DRs and rectangular DRs in free space, the coupling between two rectangular DRs in the MIC environment has not been fully studied. The method of moments, with combined entire-domain and subdomain basis functions, is applied to the volume integral equation for the simulation of two rectangular DRs in the MIC environment. The resonant frequency of the even-and odd-mode of the entire structure is obtained by searching for the minima of the reciprocal of the condition number of the impedance matrix. The coupling coefficient is then calculated based on the resonant frequencies. Numerical. examples are given to show the dependence of the coupling coefficient on the distance between two DRs.
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