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A novel multilayer dual-mode filter based on substrate integrated hexagonal cavity (SIHC) that supports two degenerated modes is demonstrated. The proposed filter is composed of a modified extended-doublet. By profit from two coupled dual-mode hexagonal cavity and asymmetry feeding structure, three transmission zeros (TZs) are generated. Accordingly, the filter not only has good selectivity due to...
A novel multilayer dual-mode filter based on substrate integrated hexagonal cavity (SIHC) that supports two degenerated modes is demonstrated. The proposed filter is composed of a modified extended-doublet. By profit from two coupled dual-mode hexagonal cavity and asymmetry feeding structure, three transmission zeros (TZs) are generated. Accordingly, the filter not only has good selectivity due to...
A novel defected ground structure (DGS) with two transmission zeros and a sharp cutoff frequency response is proposed. Both the two transmission zeros generated by the new DGS are lower than the one generated by a dumbbell-shaped DGS etched the same square area dimensions. On the basis of the proposed DGS, a lowpass filter has been designed, fabricated and measured. The filter with 3 dB cutoff frequency...
In this paper, a novel bandpass filter using microstrip-via-CPW resonator is proposed. This symmetric resonator can support two modes. By introducing source/load coupling, two additional zeros can be generated. The whole structure was meandered for size reducing. Advantages of using this type of filter are not only its low insertion loss, but also its controllable transmission zeros. Both simulated...
A compact elliptic function lowpass filter using a stepped impedance hairpin resonator is proposed. The filter has the advantages of compact size, low insertion loss, easy fabrication, a wide stopband, and sharp cutoff frequency response. In order to cause a sharp cutoff frequency response and the wide stopband suppression, a coupled stepped impedance resonator is taken into consideration for the...
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