A5036688474- Chaos control and synchronization
- Nonlinear Dynamics and Pattern Formation
- Advancements in PLL and VCO Technologies
- Quantum chaos and dynamical systems
- Radio Frequency Integrated Circuit Design
- Gyrotron and Vacuum Electronics Research
- Advanced Frequency and Time Standards
- Power Line Communications and Noise
- Radio Wave Propagation Studies
- Bluetooth and Wireless Communication Technologies
- Superconducting and THz Device Technology
- Analog and Mixed-Signal Circuit Design
- ZnO doping and properties
- Electromagnetic Compatibility and Noise Suppression
- stochastic dynamics and bifurcation
- Semiconductor Lasers and Optical Devices
- Microwave Engineering and Waveguides
- Optical Network Technologies
- Semiconductor materials and devices
- Advanced Fiber Laser Technologies
- Advanced Control and Stabilization in Aerospace Systems
- Microwave and Dielectric Measurement Techniques
- Numerical methods in inverse problems
- Nonlinear Photonic Systems
- Plant and Biological Electrophysiology Studies
Government of West Bengal
2024
Burdwan Medical College & Hospital
1997-2016
University of Dhaka
2015
Haldia Institute of Technology
2008-2012
University of Burdwan
1987-1996
Indian Institute of Technology Roorkee
1982
The dynamics of a system comprising two bilaterally coupled Gunn oscillators (BCGOs) has been examined using circuit theoretic model the oscillator (GO). efiects coupling factors (kij) between i-th and j-th on frequency-range synchronized operation magnitude common frequency oscillation have semi-analytically by numerical solution equations. occurrence chaotic oscillations at verge synchronization bands is observed in simulation. experimental response BCGO operating X-band obtained results...
The dynamics of the onset oscillations in a wave guide cavity based Gunn Oscillator (GO) has been critically examined through numerical simulations and experimental studies. transition GO from non-oscillatory to an oscillatory state same reverse direction occurs at different critical values dc bias voltage applied GO. In presence weak RF field cavity, with broad band continuous spectrum multiple discrete line are observed output for below above mentioned values. Analysing numerically...
Dynamical stability of a system bilaterally coupled periodic Gunn oscillators (BCPGO) has been studied employing Melnikov's global perturbation technique. In the BCPGO system, fractional part output signal one oscillator is injected into other through coupling network. The considered as on free running dynamics receiving and amount quantifled by parameter named factor (CF). limiting values CFs leading to chaotic are predicted analytically calculating Melnikov functions (MFs) in respective...
We have studied the performance of a Gunn oscillator (GO) based angle modulator–demodulator system in transmitting chaotic signals X-band microwave frequency channel. The principle bias tuning GO is employed to implement modulator used transmitter. said operated free running condition and then synchronized an external signal, thus generating modulated (FM) phase (PM) signals, respectively. demodulator circuit implemented with incoming followed by mixer multiplying input output low pass...
A new form of microwave FM discriminator using simultaneously the technique injection synchronization and automatic bias tuning has been proposed. The present basically consists an injection-synchronized Gunn oscillator arrangement for in correspondence to a measure instantaneous phase/frequency error between incoming signal output. detailed analysis on performance, which closely fits with experimental results, presented. performance is much better than that conventional one.
The dynamics of a system two bilaterally coupled chaotically oscillating X-band Gunn oscillators (GOs) has been studied by numerical simulation and hardware experiment. efiect variation the coupling strengths between in paths explored. chaotic oscillations GOs have become synchronized most cases when factors (CFs) are around 20% or more. However, transformation states to quasi-periodic ones observed for some values CFs. A detailed analysis on instantaneous error parameters GO state variables...
We have studied dynamics of a periodic X-band Gunn oscillator (GO) forced by microwave chaotic signals through numerical simulation and hardware experiment.The chaos used as forcing signal is generated in periodically driven non-oscillatory GO.Numerical results indicate that the GO becomes for moderate strength chaos.The found to become phase or general synchronized depending on latter one.Hardware experiments are performed frequency.It shows generation due forcing.Moreover, synchronization...
The dynamics of bilaterally coupled Gunn oscillator driven by external periodic signal has been examined through numerical simulation and experimental observation. coupling factors between the two oscillators in either path as well strength frequency driving signals are key parameters to control Driven Bilaterally Coupled Oscillator (DBCGO) system. study explores possibility generation controllable chaotic DBCGO present work also considers this method a hardware experiment. For different set...
Based upon a simple concept, the phenomenon of falselocking is described and locking range characteristics long-loop phase-locked receiver exposed to signal contaminated with cochannel interfering tone are presented. Also, limiting condition synchronisation in such situation obtained.
The frequency chirp phenomenon of IMPATT oscillators and the capability injection synchronization in removing it are examined. Simultaneous use locking bias tuning, help generation dechirped mm-wave oscillations with diodes. Computer simulation confirms theoretical predictions.
An analytical expression describing the characteristics of a tri-state phase frequency detector is presented. Using this relation, uniform jitter and additive noise responses said system analytically studied results are compared with simulated responses.
Experimental results are presented, which show that transmission type injection locked Gunn oscillators superior to their reflection counterparts.
Effects of package inductance and capacitance on the behavior microwave Gunn oscillator have been studied analytically through numerical simulation. In presence parasites system equation is described by two coupled second order differential equations. Critical examination reveals that for a certain range magnitudes relative to other device circuit parameters dynamics can become chaotic. However, application an external synchronizing signal suitable frequency power, chaotic be controlled....