Elliptic filter rigorous design and modelling applying the finite element method

This paper describes a new dual mode coupling technique which allows the replacement of classical dielectric resonators, coupling and tuning screws commonly used in dual mode filters, by slotted dielectric resonators. The theoretical analysis is performed applying the three dimensional finite element method. For the first time, a synthesis method is developed to design rigorously a four and an eight pole dual mode slotted dielectric resonator filter. The theoretical responses show good agreement with the experimental ones.<>