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This paper presents a compact triple mode band pass filter (BPF) using dielectric-loaded cylindrical cavity that allows the realization of three transmission zeros. This class of triple mode resonator utilizes the degenerate TE11 modes and the single TM01 mode. Coupling structure is based on choosing the proper resonator height and input/output feeding probe position (angle Ø) to achieve the desired...
Dual-mode ring resonator filter is designed to have a relatively wide passband with a miniaturized circuit area. The miniaturization is achieved by folding the ring trace to a spiral configuration. The two degenerate modes are split up by an asymmetric inductive perturbation. As a result, the circuit area is only 29% of that of a conventional ring. The strong I/O coupling required by the wide passband...
A miniaturized bandpass filter with wide stopband is presented in this letter. It utilizes two spiral quarter-wavelength resonators for size reduction. By adding extra lines to the feeding structure, mismatching at harmonic frequencies can be realized and wide stopband can be obtained. To verify the proposed idea, an experimental filter is implemented. The measured results show that better than 25...
A novel cross-coupled band-pass filter(BPF)based on the flute resonator is proposed in this paper. Due to the adoption of the same new configuration of coupling coefficient, the distance between the two loops is clearly shortened, which offers BPF an advantage of miniaturization. The configuration is characterized by a higher Q factor by introducing two transmission zeros in the transfer-function...
Three types of resonators and filters are described that belong to the family of broad-side coupled metal strip structure. Strong coupling between strips due to large mutual capacitance naturally increases the intensity of stored electric energy, resulting in a high effective permittivity for artificial dielectrics and a low resonant frequency for multi-strip resonators. Both features are useful for...
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