Rigorous Design of the Coupling Between a Dielectric Resonator and a Microstrip Line

The coupling between a dielectric resonator and a microstrip line is always topical because of the use of D.R. in many microwave active devices, in particular in oscillators. In this paper the coupling´coefficient between a microstrip line and cylindrical dielectric resonators of different dimensions used on their first TE mode is evaluated by using 3 analytical methods. The results prove the limits of these methods. Some rigorous computations using the Finite Element Method (F.E.M.) have been developped. Theoretical and experimental results are then in good agreement.