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A pseudo-elliptic bandpass filter based on two top-coupled parallel-connected ring resonators is presented. Each ring contributes to the creation of two (2) poles leading to a 4th order response of the filter. Based on the topology, two (2) transmission zeros are obtained at both sides of the passband, ensuring the high selectivity of the filter. Centered at 2 GHz with 15% relative bandwidth a proof...
This paper presents a new topology of dual-band bandpass filter which is based on two series-cascaded ring resonators and fed via quarter-wavelength coupled-lines. Based on such topology, a microstrip dual-band filter is designed and realized on FR4 substrate. The passbands of the dual-band filter are centered at 0.89 GHz and 1.20 GHz with relative bandwidths of 18 % and 11 %. Simulated and measured...
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