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A compact bandpass filter (BPF) with a wide upper stopband using a short-circuited microstrip coupled-line hairpin resonator is presented. The equivalent transmission-line circuit model is developed to analyse the performances of the proposed filter. The feeding lines are capacitively coupled to the resonator at the point which divides the fingers of the hairpin into two segments at a ratio of 1:2...
A dual-band filter has been designed and fabricated using two dual-mode resonators. Current distributions of four modes of this filter are investigated using full-wave electromagnetic simulations. It shows that the folded canonical topology can be realized using the proposed dual-mode filter structure. A dual-band filter is optimized using an analytical procedure and the corresponding coupling matrix...
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