• DocumentCode
    564361
  • Title

    Balanced wideband tapered three-transducer low-loss SAW filters with impedance conversion

  • Author

    Doberstein, S.

  • Author_Institution
    ONIIP, Omsk, Russia
  • fYear
    2006
  • fDate
    27-30 March 2006
  • Firstpage
    54
  • Lastpage
    57
  • Abstract
    This paper presents the balanced three-transducer SAW filters using tapered IDTs on YZ LiNbO3 with impedance conversion as 1:2.6 from the input to output in a wide fractional bandwidth of 6-28%. The filters have shown an insertion loss of 4-6 dB, passband ripple of 0.5-2 dB, shape factor of 1.3-2.5, stopband attenuation of 20-35 dB in a center frequency of 35 MHz. Matching the filters with the loads was provided by LC-elements. Withdrawal weighting is used in order to improve the filter selectivity.
  • Keywords
    LC circuits; interdigital transducers; lithium compounds; surface acoustic wave filters; LC element; LiNbO3; balanced wideband tapered three transducer filter; filter matching; frequency 35 MHz; impedance conversion; interdigital transducer; low loss SAW filter; tapered IDT; Bandwidth; Frequency response; Impedance; Insertion loss; Passband; SAW filters; Shape;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Frequency and Time Forum (EFTF), 2006 20th European
  • Conference_Location
    Braunschweig
  • Print_ISBN
    978-1-4673-2642-1
  • Type

    conf

  • Filename
    6230945
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=564361