Dr- Kurmendra

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• Doctor of Philosophy
• Professor (Associate) at North Eastern Regional Institute of Science and Technology

Accurate detection of cardiac arrhythmias is crucial for preventing premature deaths. The current study employs a dual-stage Discrete Wavelet Transform (DWT) and a median filter to eliminate noise from ECG signals. Subsequently, ECG signals are segmented, and QRS regions are extracted for further preprocessing. The study considers five cardiac arrh...

Accurate detection of cardiac arrhythmias is crucial for preventing premature deaths. The current study employs a dual-stage Discrete Wavelet Transform (DWT) and a median filter to eliminate noise from ECG signals. Subsequently, ECG signals are segmented, and QRS regions are extracted for further preprocessing. The study considers five cardiac arrh...

Micro-Electro-Mechanical System (MEMS) switches have emerged as pivotal components in the realm of miniature electronic devices, promising unprecedented advancements in size, power consumption, and versatility. This literature review paper meticulously examines the key issues and challenges encountered in the development and application of MEMS swi...

A label-free platform based on integration of cantilever and photonic crystal cavity resonator is reported with both high sensitivity and ultra-high quality factor for femto-gram detection of chemicals. The proposed chemical sensor shows sharp resonant frequency with quality factor of 12800, displacement and wavelength shift is obtained as 29.9425...

The main objective of this work is to design, simulate and analyse MEMS based different rectangular micro cantilever beam with different materials. In this work, the simulation of all the different micro cantilever beams will be done using COMSOL Multiphysics software by applying equal force onto the beam surface. The materials and beam type select...

In this review article, the important switch performance parameters such as actuation voltage, capacitance ratio, radio frequency-scattering parameters (RF S-parameters), the effect of air gap variation and switching time are covered along with their improvement strategies and methods. The available methods in literatures suggest that reduced sprin...

The micro-electro-mechanical-system switch performance significantly depends on materials used for the design of different components. The two most important elements of the MEMS switch are the beam membrane and dielectric layer. Thus, the selection of a material for these two components should be done with utmost care. In this paper, Ashby’s mater...

Background: Nanomaterial is one of the most used materials for various gas sensing application to detect toxic gases, human breath, and other specific gas sensing. One of the most important applications of nanomaterial based gas sensors is as biosensing applications. In this review article, the gas sensors for biosensing are discussed by classifyin...

This paper is designed to review the MEMS switch by considering key aspects on the basis of mechanical structure, actuation methods, and types of contact and circuit configurations. The cantilevered and clamped–clamped switch structures are explored and discussed. Actuation methods and switch configurations have also been covered to give more insig...

The micro-electro-mechanical-system switch performance significantly depends on materials used for the design of different components. The two most important elements of the MEMS switch are the beam membrane and dielectric layer. Thus, the selection of a material for these two components should be done with utmost care. In this paper, Ashby's mater...

A state of the art review on Radio Frequency Micro-Electromechanical Systems (RF MEMS) capacitive switches is reported by considering two key aspects: (1) materials selection approaches for improving performance, and (2) fabrication methods used in capacitive MEMS switches. The beam and dielectric materials used in capacitive MEMS switches and the...

The performance of the RF MEMS capacitive switch is majorly decided on capacitance ratio and loss in the dielectric layer as they decide the isolation (in dBs) in off condition. The capacitances in a MEMS capacitive switch in pull-up and pull-down states are used for deciding the capacitance ratio. In this article, we have presented a method to fin...

This study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to...

The original version of this article unfortunately contains a typing error. Last term of Eq. (5) and brackets were incorrectly placed while article preparation and the correct version of that equation should be

This paper reports a model and investigates into capacitive studies of microelectromechanical system switch through considerations of material’s behavior on various parameters like dielectric thickness, thickness and width of bridge structure and also with distance between two electrodes including fringe field effect on pull up and down capacitance...

In this paper, a modified mathematical model for capacitance analysis of micro-electro-mechanical switch based on Agarwal’s Model has been presented. This model is applicable in the condition when the micro-switch is supplied with electrostatic voltages. Effects of perforated structure and fringe field are accounted for accurate capacitance analysi...

Switches are very basic components for any communication application. The switch performance depends on their ability to allow a signal without loss and its speed of operation. In this paper, the different switches which are being used for RF application are presented along with their advantages and disadvantages. The main focus of this study is to...

The Micro-hot plate is the one of the key component of the gas sensor, which is used to achieve and control the high temperature to detect the various changes occurs at the sensing layer of the sensor. In this paper, three different types of geometry of micro hot plate such as single meander, double meander and modified spiral based Micro-hot plate...

The biosensors are being used for detection of various dangerous biomarkers present in water, air and human body, etc. Invasive and non-invasive methods are discussed. In non-invasive method, the early detection of any disease involves detection of available biomarkers in exhaled breath at ppb level. The biomarkers for different disease are present...

This paper presents the design of a MEMS shunt capacitive switch with fixed–fixed beam for high frequency RF applications. The switch dimensions were very carefully chosen to obtain the optimum performance of the switch when actuated with RF transmission line. The designed switch uses two different structures: beam without perforations and beam wit...

In this paper, the presented work aims to provide a designed model based on Finite element method for detection of Malaria protozoan parasites. Micro-cantilevers are next generation highly efficient biosensors for detection and prevention of any disease. Here, an E-shaped model for micro cantilevered biosensor is designed using COMSOL Multiphysics...

As Demand of High speed devices increasing for RF and satellite communications with better accuracy, MEMS technology is considerd to be emerging technology to fulfill that need. In this paper, A MEMS shunt capacitive switch with fixed- fixed beam have been designed and simulated for numerous parameters. The parameters for study are Selection of bea...

A novel structure has been designed to be used as piezoelectric Micro Electro Mechanical Systems (MEMS) energy harvester. A deep investigation has been made for the selection of the piezoelectric material and also for the design of the structure. Finally, the structure of a `Jaw Harp' is used and `Rochelle Salt' is applied as the piezoelectric mate...

This paper presents design of a RF MEMS (Radio Frequency Micro Electro Mechanical system) capacitive shunt switch to study the switch performance which depends on various indices. To achieve high performance in the MEMS switch, the different component materials of the switch were chosen very carefully. Modeling equations were also derived for desig...

This paper presents the design of improved MEMS shunt switch for RF 2 communication applications. The switch was designed to provide a better perfor- 3 mance in 10–100 GHz range. The switch was optimized in terms of width of the 4 beam and air gap between the fixed type beam and dielectric layer to improve the 5 isolation, insertion, and return los...

As the demand for wireless, miniature and low power devices are increasing day-by-day, so as the need for low cost, miniature size, very long lasting and environment- friendly sources of power is also increasing for implementing in those devices. Here, the Piezoelectric MEMS Energy Harvesters are fulfilling that need. In this paper, review work...

Many research investigations reveal that most of the MEMS devices employ a beam whose frequency and deflection responses are major concern before choosing it for a specific application. This paper deals with designing and simulation of various MEMS based rectangular shaped cantilever beams. The rigorous studies have been done to obtain modeling equ...

The nanostructures are being used for the various nonlinear optical devices. In this paper we have studied the few nonlinearities of ZnO quantum dots considering susceptibility as the nonlinear parameter and the equation for the second order nonlinearity of quantum dots have been developed and simulations have been performed for second order suscep...

Eigen energies and wave function of Quantum dots are discrete in nature. In this research study, calculation of Eigen energies and wave-function in tight binding model using Nano-hub is shown which is an atomistic tool for nanotechnology . This particular tool uses sp3d5s* hybridization tight binding model. It shows the results of Eigen energies an...