Rajendra Dhakal, Ph.D

Research Topics

Keywords: Flexible Wearable Pressure Sensors | RF/Microwave Integrated Sensors | Machine Learning | Glucose Biosensors | Resonators & Filters

1. Flexible Sensor

My research focuses on improving noninvasive biosensing and wearable health monitoring systems through the integration of flexible electronics and artificial intelligence (AI). I aim to develop practical, affordable, and user-friendly devices that will assist in improving the quality of life for patients and athletes with suboptimal health conditions. I also contributed to the design of self-powered potentiometric pressure sensors to precisely measure dynamic and static stimuli in the human body. These sensors, combined with AI-based algorithms, enable real-time monitoring and classification of rehabilitation postures and movements. The integration of AI with wearable technology has further enhanced data analysis, allowing simple bodily movements to be converted into complex commands or information. Additional work explored the application of pressure-sensitive devices at various locations in the human body, including the wrist, elbow, and finger, to observe physiological signals and movements such as pulse rate, elbow bending, finger flexing, and wrist twisting.

2. Biosensors/Glucose sensor

The development of an integrated device and analysis environment with radio frequency biosensing by the implementation of Micro/nano/flexible devices. The Integrated passive device technology (IPD) is successfully implemented to achieve lower cost, further miniaturization, and higher performance in microwave devices, applied to the front-end modules of wireless communication systems and In vitro biosensing with serum and deionized water glucose solution. Various kinds of high performance IPDs sensor was fabricated on a 6 inch GaAs wafer along with different kinds of IPD devices like capacitive structures, couplers, power dividers, bandpass filters, and bandstop filters.

3. Hybrid-Type Passives Development

This research mainly focus on the microstrip passives design, simulation, fabrication and measurement. As wireless communication technology makes a rapid development, microstrip passives with compact size, high selectivity, low loss and wide stopband suppression are highly demanded. In response to this need, many different methods on designing various of passives have been explored and reported

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