• DocumentCode
    2769491
  • Title

    Small-sized 71 MHz GSM-IF filter using SAW resonator on Li2 B4O7 substrate

  • Author

    Ichikawa, S. ; Ebata, Y. ; Koshino, M. ; Mishima, N.

  • Author_Institution
    Toshiba Corp., Yokohama, Japan
  • Volume
    1
  • fYear
    1998
  • fDate
    1998
  • Firstpage
    43
  • Abstract
    A small package size and low loss filter for GSM-IF have been developed with SAW resonators on LBO substrate. For realizing low loss of about 43 dB and very steep slope over 50 dB at +/-700 kHz offset from center frequency, the filter is composed of 4-pole resonator filter which consists of two cascaded IDT type DMS resonator filters. Each DMS filter is a longitudinally coupled resonator and uses withdrawn electrode technique of the IDT attached to suppress the spurious response. The filter is mounted in 9.1×48 mm ceramics package even for 71 MHz
  • Keywords
    VHF filters; cellular radio; interdigital transducers; surface acoustic wave resonator filters; 4.3 dB; 71 MHz; GSM-IF filter; IDT type DMS resonator filters; Li2B4O7; SAW resonator; four-pole resonator filter; longitudinally coupled resonator; loss; package size; spurious response; withdrawn electrode technique; Resonator filters; Surface acoustic waves;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
  • Conference_Location
    Sendai
  • ISSN
    1051-0117
  • Print_ISBN
    0-7803-4095-7
  • Type

    conf

  • DOI
    10.1109/ULTSYM.1998.762096
  • Filename
    762096
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2769491