Ultra-wideband bandpass filter with multiple notch bands using nonuniform periodical slotted ground structure

Zhang Cheng Hao, Jia Sheng Hong, Jonathan P. Parry, Duncan P. Hand

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

A novel ultra-wideband (UWB) bandpass filter that is capable of integrating multiple notch bands is proposed in this paper. A multilayer nonuniform periodical structure, which can generate multiple transmission zeros, is deployed in the filter design to improve the selectivity and upper stopband performance of the filter. Short-circuited stub resonators are then integrated to obtain multiple notch bands. The compact footprint of the filter is achieved. UWB filters of this type without a notch and with single-, double-, and triple-notch bands are designed to meet the Federal Communications Commission-defined UWB indoor limit. The designed filters are verified by experiments and fabricated by using multilayer liquid-crystal polymer lamination technology. Both full-wave simulated and measured results are presented and good agreement between them is observed. The proposed filter has good performance and is attractive for UWB communication and radar systems. © 2009 IEEE.

Original languageEnglish
Article number5337961
Pages (from-to)3080-3088
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Volume57
Issue number12
DOIs
Publication statusPublished - Dec 2009

Keywords

  • Bandpass filter
  • Liquid-crystal polymer (LCP)
  • Microstrip filters
  • Microwave filters
  • Ultra-wideband (UWB)

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