High-selectivity wideband balanced bandpass filters using symmetrical multi-mode resonators
作者： Wenjie Feng , Wenquan Che , Liming Gu , Quan Xue
DOI: 10.1049/IET-MAP.2012.0444
关键词:
摘要: Two novel high-selectivity wideband balanced bandpass filters using symmetrical multi-mode resonators are presented. The proposed resonator is used to realise a six-order wide passband in the differential mode. In addition, stopbands with insertion loss greater than 15 and 20 dB for commode mode (0–18.5 GHz, 0–19 GHz) can also be achieved by resonators. even/odd-modes of adjusted changing characteristic impedance shorted/open stubs. planar 3 fractional bandwidths 67.6 63.7% designed fabricated. theoretical measured results good agreement show in-band filtering performances high selectivity.
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