Two-Stage Chaotic Colpitts Oscillator for the UHF Range

  • G. Mykolaitis Plasma Phenomena Laboratory, Semiconductor Physics Institute
  • A. Tamaševičius Plasma Phenomena Laboratory, Semiconductor Physics Institute
  • S. Bumelienė Plasma Phenomena Laboratory, Semiconductor Physics Institute
  • A. Baziliauskas Kaunas University of Technology
  • E. Lindberg Technical University of Denmark

Abstract

A hardware prototype of the novel two-stage Colpitts oscillator employing the microwave BFG520 transistors with the threshold frequency of 9 GHz is described. The circuit is investigated both numerically and experimentally. Typical phase portraits and broadband continuous power spectra demonstrate chaotic performance of the oscillator in the ultrahigh frequency range (UHF: 300 to 1000 MHz). The two-stage chaotic Colpitts oscillator exhibits better spectral characteristics compared to a classical single-stage Colpitts oscillator. The relative bandwidth is 0.47 and 0.74 for the central frequency of about 500 MHz within the spectral unevenness of 10 dB and 20 dB, respectively. Ill. 4, bibl. 5 (in English; summaries in Lithuanian, English, Russian).

Author Biographies

G. Mykolaitis, Plasma Phenomena Laboratory, Semiconductor Physics Institute
A. Tamaševičius, Plasma Phenomena Laboratory, Semiconductor Physics Institute
S. Bumelienė, Plasma Phenomena Laboratory, Semiconductor Physics Institute
A. Baziliauskas, Kaunas University of Technology
E. Lindberg, Technical University of Denmark
Published
2004-04-19
How to Cite
Mykolaitis, G., Tamaševičius, A., Bumelienė, S., Baziliauskas, A., & Lindberg, E. (2004). Two-Stage Chaotic Colpitts Oscillator for the UHF Range. Elektronika Ir Elektrotechnika, 53(4). Retrieved from http://eejournal.ktu.lt/index.php/elt/article/view/10923
Section
T 191 HIGH FREQUENCY TECHNOLOGY, MICROWAVES