Novel Narrow-Band Balanced Bandpass Filter Using Rectangular Dielectric Resonator
Abstract— A novel narrow-band balanced bandpass ﬁlter (BPF) using two coupled rectangular dielectric resonators < Final Year Projects 2016 > DRs is proposed. According to the electromagnetic (EM) ﬁeld properties of the DR, the mode, as a dominate mode of the DR, can be differentially excited for constructing the fundamental passband of the balanced BPF. Meanwhile, the mode of the DR, functions as a common-mode response in this design, is tuned far away from in spectrum by optimizing the DR size so that the common-mode suppression in the differential passband can be improved signiﬁcantly. To validate the proposed design concept, a second-order narrow-band balanced BPF is designed, fabricated and measured. The measured results show good agreement with the simulation data.