Indian Journal of Science and Technology
Year: 2014, Volume: 7, Issue: 7, Pages: 924–932
B. C. Sarkar1*, J. Chakraborty1 and S. Sarkar2
1 Department of Physics, The University of Burdwan, Golapbag, Burdwan-713104, West Bengal, India; [email protected]
2 Department of Electronics, Burdwan Raj College, Burdwan-713104, West Bengal, India
Dynamics of a microwave (X band) Gunn oscillator in presence of a periodic forcing signal has been critically studied to explore the existence of chaos in the behavior of the driven Gunn oscillator (DGO). A broad band continuous spectrum is experimentally observed at the output of the DGO just at the verge of the synchronization band for certain strength and frequency of the forcing signal. For characterisation of the obtained broad band signal, time domain analysis of the frequency down converted DGO output is done and different chaos quantifiers like Maximum Lyapunov exponent and Correlation dimension are evaluated to confirm the chaotic mode of oscillations. Numerical simulation of the system equations also indicate that the dynamics of the DGO enters into a chaotic domain at these conditions.
Keywords: Driven System, Gunn Diode, Microwave Chaos, Synchronized Oscillator
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