• Patent Number
    中華民國發明第 072340號
  • Inventor
    吳瑞北、趙方麟 (吳瑞北)
  • Time
    Oct 10,2006
  • Abstract

    A new design method for tri-band filters with improved band allocation is proposed. The design concept treats different band allocations with different methodologies. For the bands assigned to adjacent frequency regions, transmission zeros are introduced to split one of the single bands two. For the bands that are assigned separately, different harmonic modes of stepped-impedance resonators (SIRs) are used to realize different passbands.  Two design examples with different responses and band allocations are given, and were verified by experiments as well as full-wave simulation results.