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Design of balanced power divider with wide common‐mode suppression band
Author(s) -
Lee ChingHer,
Hsu ChungI G.,
Chen WenXuan
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30945
Subject(s) - ground plane , wilkinson power divider , microstrip , common mode signal , bandwidth (computing) , common mode rejection ratio , fractional bandwidth , power dividers and directional couplers , electrical engineering , topology (electrical circuits) , optoelectronics , physics , electronic engineering , engineering , telecommunications , frequency divider , band pass filter , amplifier , operational amplifier , digital signal processing , antenna (radio) , analog signal
Abstract In this paper, a balanced power divider (PD) is designed and implemented in a three‐layer configuration. It consists of two tightly stacked microstrip Wilkinson PDs with a shared ground plane in the middle layer. With both dumbbell‐shaped and partially interdigital open‐ended slots embedded in the common ground, the designed balanced PD can yield a high common‐mode (CM) suppression level over a very wide frequency band without degrading the differential‐mode (DM) performance. A close examination of this design reveals that good CM suppression mainly comes from the blocking of the ground‐plane current path by the open‐ended slots in the ground plane. In addition, the proposed balanced PD also exhibits a very wide CM isolation band. A prototype of the proposed balanced PD is realized. The measured fractional frequency bandwidth for CM suppression is 68% and for CM isolation is 93%.