[5] “Multi-Functional Balanced-to-Unbalanced Filtering Power Dividers with Extended Upper Stopband,” IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 66, no. 7, pp. 1154-1158, Jul. 2019.

作者：Wenjie Feng, Xueke Ma, Roberto Gómez-García, Yongrong Shi, Wenquan Che, and Quan Xue

摘要：Two new types of multi-functional RF wide-band differential-mode-to-single-ended filtering power dividers are reported in this brief. Their first configurations exploit halfwavelength ring resonators and coupled-line sections to attain common-mode suppression throughout a broad spectral range. Furthermore, asymmetrical coupled-line stages are incorporated in more-advanced schemes to enlarge upper-stopband bandwidth. Two demonstrative microstrip prototypes for the different structures of this RF tri-functional circuit concept that operate at the 1.7–2.7-GHz 4/5-generation long-term-evolution band are built and tested.