Abstract
A novel adjustable dual-band bandpass filter using a quantic-mode resonator consisting of stepped impedance resonators (SIRs) and coplanar waveguide resonators (CPWRs) is proposed in this paper. The SIRs provide the lower passband with two transmission poles (TPs), while the upper passband is introduced by CPWRs and two TPs are obtained. Furthermore, an equivalent rectangular loop resonator (RLR) derived from the CPWRs is also introduced, providing another TP for the upper passband. One of the marked features of the filter is that the two passbands can be adjusted independently because of the independent resonant paths of different resonators. Besides, this filter has four transmission zeros (TZs), promising good stopband rejection and high band-to-band isolation. The measured results are consistent with the simulated results.
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Li, K., Kang, Gq., Liu, H. et al. High-selectivity adjustable dual-band bandpass filter using a quantic-mode resonator. Microsyst Technol 26, 913–916 (2020). https://doi.org/10.1007/s00542-019-04616-8
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DOI: https://doi.org/10.1007/s00542-019-04616-8