Bandpass Filter Design Using a Novel Compact Planar Resonator

A three-pole Chebyscheff bandpass filter is realized using a novel compact planar resonator: the wired-patch resonator. The structure that results from the design procedure is an application example of this resonator in the field of the passive filters. The final structure, a three pole filter having center frequency of 2.14 GHz, is compatible with the UMTS (Universal Mobile Telecommunications System) standard and is realized in a 1 inch × 1 inch square ceramic high permittivity substrate. Full wave Finite Element (FEM) analysis of the structure is employed to properly tune the resonators and to adjust the mutual couplings. The optimization phase is driven by the Identification Method which results in dramatically reducing the design time.