Design and implementation of a band-pass filter using dielectric resonators with a new excitation structure

A Tchebychev band-pass filter is constructed by placing high-quality factor TE_01δ mode dielectric ring resonators inside a cut-off rectangular waveguide. The focus is on the design process and practical realisation of the filter, which includes choosing optimum geometry of a dielectric resonator, enclosure dimensions and the excitation structure. A novel excitation structure is introduced, which provides high coupling. Also, a new orientation in mounting dielectric resonators in cavity is suggested, which helps in making the filter response more symmetric. The three-pole band-pass-fabricated filter exhibits a symmetrical response with small band-pass ripple.