Abstract
We propose a multilayer bandpass filter(BPF) with attenuation poles using folded resonators with open-circuited end. Firstly, the basic characteristics of a folded resonator with open-circuited end under the change of the parameters is examined by an electromagnetic simulator. Secondly, 3-pole multilayer BPFs using the resonators above are proposed, simulated and experimented. As a result, the bandpass characteristics with attenuation poles near the lower and higher side of the center frequency is realized by the proposed structure.
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