• DocumentCode
    2375293
  • Title

    An uncooled microwave oscillator with 1-million effective Q-factor

  • Author

    Tsarapkin, D.P.

  • Author_Institution
    Radio Eng. Fac., Moscow Power Eng. Inst., Russia
  • fYear
    1993
  • fDate
    2-4 Jun 1993
  • Firstpage
    779
  • Lastpage
    783
  • Abstract
    Calculations reveal the possibility of 10-15 dB flicker phase noise reduction in a bridge-type oscillator. A super-low phase noise S-band bipolar transistor oscillator based on a shielded sapphire disc dielectric resonator (SDDR) used as a filtering circulator bridge is considered. With shielding sizes optimized, the SDDR Qφ- factor was ⩽3 × 105 at room temperature. An effective (loaded) oscillator Q-factor of greater than 3 × Qφ, i.e., of about 1 million, was realized
  • Keywords
    Q-factor; bridge circuits; dielectric resonator oscillators; flicker noise; microwave oscillators; phase noise; 10 to 15 dB; Al2O3; Q-factor; S-band bipolar transistor oscillator; SDDR; bridge-type oscillator; filtering circulator bridge; flicker phase noise; shielded sapphire disc dielectric resonator; uncooled microwave oscillator; Bipolar transistors; Bridges; Dielectrics; Filtering; Microwave filters; Microwave oscillators; Phase noise; Q factor; Resonator filters; Temperature;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Frequency Control Symposium, 1993. 47th., Proceedings of the 1993 IEEE International
  • Conference_Location
    Salt Lake City, UT
  • Print_ISBN
    0-7803-0905-7
  • Type

    conf

  • DOI
    10.1109/FREQ.1993.367477
  • Filename
    367477
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2375293