• DocumentCode
    1931036
  • Title

    Hairpin filters with tunable transmission zeros

  • Author

    Chih-Ming Tsai ; Sheng-Yuan Lee ; Chin-Chuan Tsai

  • Author_Institution
    Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
  • Volume
    3
  • fYear
    2001
  • fDate
    20-24 May 2001
  • Firstpage
    2175
  • Abstract
    In the previous work, it was found that filter designed with 0/spl deg/ feed structure could have two extra transmission zeros in the stopband. In this paper, a method for tuning the frequencies of these two transmission zeros using impedance transformers is proposed. These zeros can be tuned to reject unwanted signals near the passband, such as image signals, This new approach has been experimentally verified with three second-order Butterworth filters.
  • Keywords
    Butterworth filters; UHF filters; circuit tuning; passive filters; poles and zeros; resonator filters; feed structure; hairpin filters; image signal rejection; impedance transformers; second-order Butterworth filters; tunable transmission zeros; Equations; Feeds; Filtering theory; Frequency; Impedance; Passband; Resonator filters; Transformers; Transmission lines; Tunable circuits and devices;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Microwave Symposium Digest, 2001 IEEE MTT-S International
  • Conference_Location
    Phoenix, AZ, USA
  • ISSN
    0149-645X
  • Print_ISBN
    0-7803-6538-0
  • Type

    conf

  • DOI
    10.1109/MWSYM.2001.967346
  • Filename
    967346
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1931036