Design of Wideband Bandpass Filter Based on Corrugated Disk Resonator with Multiple Resonant Modes

Qian Yang, Shuangyang Liu, Hongyu Shi, Kai-Da Xu, Xinyue Dai, Hao Du, Anxue Zhang
2021 Materials  
A corrugated disk resonator with eight grooves is proposed for wideband bandpass filter (BPF) design. Due to the spoof localized surface plasmons resonances of the corrugated metallic structure, the dipole, quadrupole, hexapole modes, and a fundamental mode excited by the introduced short-circuited via holes are employed to realize four transmission poles (TPs) in the passband. The theoretical analysis is described by the electric field and current distributions on the resonator. The resonant
more » ... tor. The resonant frequencies can be tuned easily by the parameters of the structure, which can be used to adjust the center frequency and bandwidth of the BPF freely. Furthermore, two resonators are cascaded to obtain eight TPs to improve the selectivity performance. Finally, three fabricated filters demonstrate the design method.
doi:10.3390/ma14102614 pmid:34067867 fatcat:3tpnauxyhvc3lhfepfgqq3zfmi