• DocumentCode
    1733003
  • Title

    Handheld telephone for 800MHz-band cellular radio systems

  • Author

    Nakagawa, Jun´ichi ; Hikita, Mitsutaka ; Kuwamoto, Y. ; Hagiya, S. ; Iwama, A. ; Kimura, H.

  • Author_Institution
    Hitachi Ltd., Tokyo, Japan
  • Volume
    37
  • fYear
    1987
  • Firstpage
    435
  • Lastpage
    440
  • Abstract
    A small handheld telephone with a volume of 400ml for 800MHz-band cellular radio systems has been developed. The use of several miniaturized RF hybrid modules and costom integrated circuits have reduced the size, weight and power consumption of the developed telephone. Especially, an antenna duplexer with SAW ´Surface Acoustic Wave´ filters contributes to reducing their size and weight. Intermittent operation of a frequency synthesizer reduces the averaged power drain.
  • Keywords
    Acoustic waves; Energy consumption; Filters; Frequency synthesizers; Hybrid integrated circuits; Land mobile radio cellular systems; Radio frequency; Radiofrequency integrated circuits; Surface acoustic waves; Telephony;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vehicular Technology Conference, 1987. 37th IEEE
  • Type

    conf

  • DOI
    10.1109/VTC.1987.1623582
  • Filename
    1623582
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1733003