Simulation and experimental study of chaos generation in microwave band using Colpitts circuit

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• 作者：Zhiguo Shi (1)
  Lixin Ran (1)
  Kangsheng Chen (1)
  
• 关键词：Chaos ; Colpitts circuit ; Microwave
• 刊名：Journal of Electronics (China)
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：23
• 期：3
• 页码：433-436
• 全文大小：269KB
• 参考文献：1. M. P. Kennedy. Chaos in the Colpitts oscillator. / IEEE Trans. on Circuits and Systems I: Fundamental Theory and Applications, 41(1994)11, 771-74. CrossRef
  2. C. Wegener, M. P. Kennedy. RF chaotic Colpitts oscillator. Proceedings of the Workshop on Nonlinear Dynamics of Electronic Systems, Dublin, Irland, 1995, 255-58.
  3. G. Mykolaitis, A. Tama?evi?ius, S. Bumelien?, A. Baziliauskas, E. Lindberg. Two-stage chaotic Colpitts oscillator. / Electronics Letters, 37(2001)9, 549-51. CrossRef
  4. G. Mykolaitis, A. Tama?evi?ius, S. Bumelien?. Experimental demonstration of chaos from Colpitts oscillator in VHF and UHF ranges. / Electronics Letters, 40(2004)2, 91-2. CrossRef
  5. Z. G. Shi, L. X. Ran. Design of chaotic Colpitts oscillator with prescribed frequency distribution. / International Journal of Nonlinear Sciences and Numerical Simulation, 5(2004)1, 89-4.
  6. G. M. Maggio, O. D. Feo, M. P. Kennedy. Nonlinear analysis of the Colpitts oscillator and applications to design. / IEEE Trans. on Circuits and Systems I: Fundamental Theory and Applications, 46(1999)9, 1118-130. CrossRef
  7. Philips Semiconductors. Data sheet BFG425W NPN 25 GHz wideband transistor. Mar. 11, 1998.
  8. Agilent Technologies. Advanced design system 2002 user’s guide. Feb. 2002.
  9. A. Tama?evi?ius, S. Bumelien?, G. Mykolaitis. Evaluation of bipolar transistor for application to RF chaotic Colpitts oscillator. Proceedings of The 42nd International Scientific Conference of Riga Technical University, Riga, 2001, vol.1, 53-4.
  
• 作者单位：Zhiguo Shi (1)
  Lixin Ran (1)
  Kangsheng Chen (1)
  
  1. Department of Information and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China
  
• ISSN：1993-0615

文摘

Chaotic Colpitts circuits with fundamental frequency f * beyond 1GHz are studied by both circuit simulation and experiment using Philips-broadband transistor with threshold frequency of 25GHz. For the basic configuration of Colpitts circuit with f * of about 1.6GHz, broadband continuous power spectra could be obtained from both circuit simulations and experiments. The harmonics of the observed signal from Agilent PSA/ESA spectrum analyzer are as noticeable as far as 12GHz. A modified Colpitts circuit structure employing the parasitic inductance of BJT (Bipolar Junction Transistor) is also proposed and investigated. By circuit simulation, chaotic attractor and broadband continuous power spectra could be obtained from the modified Colpitts circuit with f * of about 3.5GHz. Because the parasitic effects of the prototype board, the experiment result of the modified Colpitts circuit does not agree well with the simulation result. The gap between the simulation and experimental result could be bridged by replacing the lumped circuit elements with distributed ones.