Broadband Filtering Power Dividers Using Simple Three-Line Coupled Structures

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

45 Scopus Citations
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  • Kai Da Xu
  • Yecheng Bai
  • Xue Ren
  • Quan Xue


Original languageEnglish
Pages (from-to)1103-1110
Journal / PublicationIEEE Transactions on Components, Packaging and Manufacturing Technology
Issue number6
Online published10 Sept 2018
Publication statusPublished - Jun 2019


Three-line coupled structure (TLCS) is employed in the design of filtering power divider (FPD) to achieve a broad fractional bandwidth and good frequency selectivity in this paper. Detailed theoretical analysis of the proposed FPD is presented by using the calculated method of impedance matrix deduction. To validate the design concept, the proposed initial FPD prototype is electromagnetically simulated, whose performance shows good consistence with that of the proposed theoretical calculation. Additionally, a simple quasi-lumped impedance transformer is introduced near the input port to further improve the matching status of the FPD. These two above FPDs are both designed with the center frequencies of 2.42 GHz and 3-dB fractional bandwidths of over 82.6%, the latter one of which is fabricated and tested. Comparisons between the simulated and measured results are presented with good agreement to verify the calculated predications.

Research Area(s)

  • Bandwidth, Equivalent circuits, Filtering, Filtering power divider (FPD), Impedance, impedance transformer, Packaging, Passband, Power dividers, three-line coupled structure, transmission zeros, wideband power divider