Investigation into microstrip Dual-mode Bandpass Filters (BPFS) with in-line feed-line configurations

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
View graph of relations


  • Jialin Li
  • Jianxin Chen
  • Quan Xue

Related Research Unit(s)


Original languageEnglish
Pages (from-to)2008-2013
Journal / PublicationMicrowave and Optical Technology Letters
Issue number10
Publication statusPublished - Oct 2006


Based on the geometry relationship of the conventional dual-mode ring resonators, this study concisely describes the operation principle of a kind of dual-mode resonator filters with in-line feed-lines. The investigated filter topology is fed by two pairs of orthogonal branch lines and can realize in-line configuration for the input and output (I/O) ports, which is useful in many practical applications. Meanwhile, the influences of feed-lines on transmission-zeros (TZs) are, for the first time, investigated to guide the design of this kind of filters. Several demonstrators are designed and examined, and good results are obtained. © 2006 Wiley Periodicals, Inc.

Research Area(s)

  • Bandpass filters (BPFs), Dual-mode, Feed-lines