Design of compact CPW bandpass filters with wide stopband

Li Jing Lin, Min-Hua Ho, Wei Qin Xu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Two compact bandpass filters composed of the lumped elements in various coplanar waveguide (CPW) forms have been presented in this study. The filters were designed to operate at the frequency of 2.45 GHz. The behaviors of these filters can be simulated by the equivalent lumped-element circuit models with each element realized by the corresponding CPW discontinuity. Simulation and measurements were found to be in good agreement. Most attractive of all, the improved-design filter has achieved about a 363% (9.04 CHz) stopband bandwidth under a 20 dB out-of-band rejection, and the measured passband's minimum insertion loss is around - 1.24 dB with 10.84% 3-dB bandwidth.

Original languageEnglish
Pages (from-to)973-976
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2007 Apr 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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