Koushik Guha

Koushik Guha
National Institute of Technology, Silchar (An Institution of National Importance under Govt. of India) · Department of Electronics and Communication Engineering

Doctor of Philosophy (PhD)
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About

228
Publications
41,930
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Introduction
Senior Member of IEEE. Highly self-motivated researcher with demonstrated research expertise on MEMS Analysis, Design and Modeling. • Rich experience in modeling and computer simulation using MATLAB, CoventorWare, MEMS+, COMSOL Multiphysics, Agilent’s Advance Design System (ADS) and ANSYS HFSS. • Computer skills: Unix/Linux/Windows.
Additional affiliations
June 2010 - February 2020
National Institute of Technology, Silchar
Position
  • Professor (Assistant)
Description
  • Dr. Koushik Guha is an Assistant Professor (Grade-I) with department of Electronics and Communication Engineering in National Institute of Technology, Silchar, Assam, with 13 years of experience in teaching and research.
June 2010 - present
National Institute of Technology, Silchar
Position
  • Professor
Education
January 2012 - December 2015
National Institute of Technology, Silchar
Field of study
  • Desing and Analysis of MEMS Switch

Publications

Publications (228)
Chapter
The human body is complex but very interesting to discover. The human body has many unsolved riddles which yet haven’t been answered and sometimes even astonishes scientists and doctors when something new is discovered. The whole review consists of the functionality of the kidney; it causes of dysfunction, methods of detection, replacement techniqu...
Chapter
This paper designs and simulates piezoelectric beams giving higher output power at lower vibrations by varying the structural geometry and seismic proof mass positions on the piezoelectric beam. A total of seven different MEMS Piezoelectric (PZT-5H) energy harvesters (devices) with non-traditional geometries which can work under ambient conditions...
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This paper presents optimization of cantilever-based radio frequency (RF) micro-electro-mechanical system (MEMS) technology switches using artificial neural network (ANN)-based prediction algorithms, i.e., linear vector quantization network. We have created a literature survey-based train dataset and finite element method (FEM) simulation-based tes...
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The currently under-deployment 5G, as well as the future 6G and Super-IoT paradigms, is demanding and will go on demanding for high-performance, frequency agile, and reliable RF passive components, ranging from simple switches to articulated devices, phase shifters, impedance matching tuners, RF power step attenuators, filters, and so on, with pron...
Chapter
A variable MEMS capacitor for Ka band frequency is designed having high capacitance ratio, less pull-in voltage, less stress misses, and better quality factor. MEMS varactor can be used as a tuning device to tune the frequency of a resonator. MEMS varactor is placed over the Substrate-Integrated Waveguide (SIW)-based resonator. The SIW resonator is...
Chapter
This paper discusses a new reconfigurable bidirectional RF transducer, i.e., antenna where both frequency and pattern are reconfigured. The antenna involves with the T-shaped rectangular patch where it will be joined by two latitudinal slits. The slits will linked to a pin diode to gain the essential frequency bands. The design was micro-machined o...
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In this article, we are explaining the electromagnetic models to simulate the effect of plasmon coupling at metal cathode and to analyze the OLED with nano-grated cathode for reduction of surface plasmon loss. The modeling and analysis of the bottom-emitting organic light-emitting diode (OLED) using nano-grating metal cathode structures is presente...
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This paper proposes a monostable nonlinear Piezoelectric Energy Harvester (PEH). The harvester is based on an unconventional exsect-tapered fixed-guided spring design, which introduces nonlinearity into the system due to the bending and stretching of the spring. The physical–mathematical model and finite element simulations were performed to analyz...
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This work is dedicated to parameter optimization for a self-biased amplifier to be used in preamplifiers for the diagnosis of seizures in neuro-diseases such as epilepsy. For the sake of maximum compactness, which is obligatory for all implantable devices, power is to be supplied by a piezoelectric nanogenerator (PENG). Several meta-heuristic optim...
Article
This review provides a detailed literature survey on microfluidics and its road map toward kidney-on-chip technology. The whole review has been tailored with a clear description of crucial milestones in regenerative medicine, such as bioengineering, tissue engineering, microfluidics, microfluidic applications in biomedical engineering, capabilities...
Patent
The present disclosure relates to the field of breast cancer cell lines detection using sensor. In particular the present disclosure relates to a novel dual gate Si 0.8 Ge 0.2 sourced 2-D TFET based breast cancer cell lines detection device.
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In this paper, we design, simulate and analyze FinFET with different materials, corresponding variation in ID VS VGS, transconductance, subthreshold slope. There is an increase in ON current on using a high-k dielectric material and subsequently an improvement in other parameters like subthreshold slope and transconductance.
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This paper presents the design a capacitive shunt type RF-MEMS switch with high isolation, high switching speed and low actuation voltage for Ka-band applications. The proposed RF-MEMS switch has chosen different structures to reduce the actuation voltage. This paper investigates various analysis such as Electromechanical and RF characteristics of...
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Modern-day biomedical science and technology have progressed with implantable neural recording systems. There is a demand for miniaturised devices that can be emplaced into the brain for an efficient neural recording process. In contrast to the commercial gadgets, the design of implantable devices is critical, as they are placed in vital regions of...
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Recent advancements in wireless communication systems utilize miniaturized devices based on microelectromechanical system technology for present and future 5G wireless applications. Nowadays, RF devices are utilizing frequencies up to 30 GHz with substantial signal propagation that leads to a slow data rate. On the other hand, there is a huge spect...
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RF MEMS switch is an excellent choice for the implementation of reconfigurability in antenna due to its good electromagnetic characteristics. In this paper, the cantilever type RF MEMS switches are used as a connecting element between the antenna patches. The shift in the frequency of the antenna is observed by integrating and actuating the differe...
Article
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In this paper, we have developed an analytical model for capacitance measurement of step structure perforated RF MEMS Switch. Capacitance model plays an important role to design and fabricate a high-performance of RF MEMS switches. Modelling signifies the validation of the proposed switch to design before fabrication by comparing the analytical and...
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This paper presents the design and simulation of RF-MEMS shunt switch and microstrip patch antenna for reconfigurability and high-frequency applications. Here, the RF-MEMS capacitive switch is designed to establish communication between the main and assistant patches of the antenna, which controls the wavelength of the propagating signal. The perfo...
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This paper presents a novel step structure of RF MEMS switch with and without uniform, non-uniform serpentine meanders, having square perforations which results with a low actuation voltage. Here, design, study, and simulation of the proposed device are evaluated in the FEM tool. By changing the span beam length of the serpentine meanders from resu...
Cover Page
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https://iopscience.iop.org/journal/0960-1317/page/miniaturized-energy-harvesting-solutions-future-6g-scenario
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In this paper, a target application-based design approach for RF MEMS switches using artificial neural networks (ANN) is presented. ANN approach is used to decide the dimensions of the RF MEMS switch for the targeted application. The ANN approach design and analysis is done using MATLAB. The results obtained by ANN method are validated using the FE...
Chapter
Clustering analysis is considered as one of the most vital analytical techniques for unsupervised machine learning and data mining. The algorithm technique influences the clustering results directly. Clustering has been a widely explored in various application domains such as neural networks, artificial intelligence (AI), statistics, image and vide...
Chapter
A surface plasmon resonance waveguide sensor operating in the visible wavelength range is presented for refractive index-based sensing. The silver material is used because of its chemical stability and its strong electromagnetic fields on surface of the nanoparticle. The simulation and modeling of surface plasmon resonance sensor are discussed. The...
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Design of a real-time device in the form of a MEMS wearable sensor poses challenge in diverse aspects. To model a device for any required ranges of the parameters, the finite element method helps efficiently as the performance of device, in terms of expected specifications like operating frequency, can be analysed with each changing parameter. Such...
Chapter
Vibration energy harvesting (VEH) is viable solution for battery free and self-powered micro-/nano-systems. The ambient vibration available for harvesting is low, random and broad. Hybrid energy harvester provides an alternative to narrow bandwidth, high operational frequency and low-power density VEH. In this paper, nonlinear hybrid vibration ener...
Chapter
This work investigates the effect of Bragg’s reflector configuration stages and its material on the performance of flexible FBAR sensor. Bragg’s reflector configuration has been formed with various high and low acoustic Impedance layers such as Mo/SiO2, W/SiO2, and W/Al. The detailed investigation of flexible FBAR sensor has been done using 2-D fin...
Chapter
In this paper, design and simulation of three kinds of microcantilevers are done with the use of COMSOL Multiphysics FEM software. The physical behaviour of the 3 microcantilevers and its corresponding response is calculated using three materials zinc oxide, lead zirconate titanate and barium titanate and with three electrodes aluminium, gold and p...
Chapter
In this paper, we have investigated high isolation and low actuation voltage offering triangular membrane-based shunt capacitive RF MEMS switch. Unlike conventional analysis, here we have extended the switch design up to the packaging stage. The triangular membrane is designed with slot and perforation. The triangular membrane is micromachined with...
Article
The need for innovation in medical device technology is immense; especially to replace the dialysis techniques the necessity is extremely high. The available techniques that promised to replace dialysis have not yet geared up to the marketization level. The utilization of live kidney cells makes these devices costly, delicate, and unreliable. This...
Preprint
Full-text available
With the periodic rise and fall of COVID-19 and countries being inflicted by its waves, an efficient, economic, and effortless diagnosis procedure for the virus has been the utmost need of the hour. COVID-19 positive individuals may even be asymptomatic making the diagnosis difficult, but amongst the infected subjects, the asymptomatic ones need no...
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This paper presents an algorithm based approach for TFET (Tunnel Field Effect Transistor) design. A numerous number of meta-heuristic algorithms have been used to procure the best device dimension for a Si–Ge (Silicon–Germanium) pocket n-TFET. The foremost important task is to find an alternative to hit and trails based device optimization and ther...
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In the present era, with the advancement of various non-conventional devices, hardware components dimensions are shrinking to great extent. Among those, significant part of researchers focus is drawn by Tunnel Field Effect Transistors (TFETs), because of their fundamental attribute of carriers conduction through built-in tunnelling mechanism. In th...
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This paper proposes a modified version of recycling folded cascode amplifier. A comparative study, modelling and analysis of the proposed design along with conventional folded cascode and recycling folded cascode have been presented in this work. The design is intended for use as a preamplifier in an epileptic neurostimulator circuit, which ensures...
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Random sequences and maps are essential for the applications in cryptography and many other fields in Information Technologies. To achieve true randomness, one still needs to refer to natural phenomena, be it physical, chemical or biological. Here we analyse the possibility to apply stochastic physico–chemical dynamics to generate truly random sequ...
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Random offset in amplifiers arises mainly due to random variations i.e. inherent mismatch in transistor parameters and greatly impacts its overall design specifications, especially in case of low frequency application. It must be minimized for high precision in the amplifier’s performance. A new approach for minimization of random offset voltage in...
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This work focuses on the analysis of a Silicon Nitride (Si3N4) lab-on-a-chip optofluidic biosensor at visible wavelength. The major design components considered for optimization are the patterned Si3N4 waveguide and the rectangular photonic crystal. The structure is designed on Si3N4 on insulator substrate. The analysis is carried out at a waveleng...
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The complex process of semiconductor device design requires precise models and efficient optimizers. This article puts forward an Asymmetrical Hetero-Dielectric (AHD) Triple Material Gate (TMG) n-type Junctionless Tunnel Field Effect Transistor (JL-TFET). A higher gate control is achieved by using triple material in control gate and hetero-dielectr...
Article
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According to the WHO (World Health Organization) report, out of 360 million people, i.e. over 5% of world population, have a disabling hearing loss. Designing a low-cost cochlear implant for hearing aid device is therefore of great importance. The overall cochlear system consists of several blocks, namely, the microphone for sensing the sound waves...
Article
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The major challenges in a piezoelectric energy harvester (PEH) are high operating frequency, narrow bandwidth and low output generation. We propose a new and efficient design concept based on optimal geometry shape and optimal segmentation of piezoelectric layer at strain nodes of higher vibration modes. The analytical model of the proposed design...
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Analytical modelling of adsorption-desorption (AD) processes in mi-cromechanical resonators enables an improved control over operation and modelling of devices based on them. It may be used either to suppress the influence of AD processes (to improve resonators stability) or to enhance it (to improve the response of resonator-based sensors). We ana...
Article
In this paper, pull in voltage in closed form model is derived from the capacitance generated in RF MEMS switches during ON and OFF conditions. The proposed model contains the ligament efficiency term and can be applicable for all perforated RF MEMS switches. The proposed model is validated by computing error percentage between simulated and modell...
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Full-text available
The importance of adsorption-based biochemical/biological sensors in biochemistry and biophysics is paramount. Their temporal response gives information about the presence of a biochemical/biological analyte, its concentration and its interactions with the adsorption sites (which may be an integral part of the surface itself or immobilized function...
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This paper presents a critical analysis of the meta-heuristic techniques used in various researches on the optimisation of photovoltaic (PV) parameters, which involves the use of different algorithms in order to extract and improve these parameters from the Single Diode Model (SDM), Double Diode Model (DDM) and Three Diode Model (TDM) respectively....
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This paper presents a study on the design and multiobjective optimization of a bimorph-segmented linearly tapered piezoelectric harvester for low-frequency and multimode vibration energy harvesting. The procedure starts with a significant number of FEM simulations of the structure with different geometric dimensions—length, width, and tapering rati...
Preprint
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In this paper, absolute evaluation of Radio Frequency Micro Electromechanical System (RF MEMS) to improve parameters like high actuation voltage and low switching time, by introducing a new fixed - fixed RF MEMS capacitive switch. The proposed switch designed step-by-step evaluation of the plane beam, a novel structure of beam, and deposit the perf...
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Abstract This article reports on the mechanical strength analysis and flow characteristics of square tip and circular tip microneedles by employing highly potent drugs that are given in extremely little quantity (microlitres) using MEMS technology, which proves to be a significant component of micropump in the application of Bio‐MEMS. These microne...
Patent
The present disclosure relates to a silicon on insulator based optical gas sensing device and its fabrication process thereof. The process facilitates modelling, analysis and development of SOI optical sensor at mid-infrared wavelength of 3.39 μm. The gas sensor is designed on SOI substrate. The structure of optical gas sensor consists of SOI chann...
Preprint
Full-text available
Recent Advancements in the wireless communication systems utilizes miniaturized devices based on Micro – Electro – Mechanical System technology for present and future 5G wireless applications. Now a days, RF devices are utilizing the frequencies upto 30 GHz and a huge traffic in signal propagation occurs which leads to the slow data rate. In other...
Article
Optimization of the RF MEMS switch is essential to enhance its performance characteristics at high frequency Millimeterwave applications. Many optimization techniques have been proposed based on design factors and output responses but not confined with the resonant frequency of RF transmission signal. In this paper, a novel optimization technique i...
Article
The output acoustic energy of a capacitive micromachined ultrasonic transducer (CMUT) can be enhanced by adjusting its membrane structure. In this paper three dissimilar membranes shapes of CMUT: circular, rectangular and hexagonal, were aimed and 3D finite element method simulated using adaptive meshing technique. The displacement as well as strai...
Article
RF MEMS switches have been employed in many commercial and defense applications due to their high potentiality at microwave and millimeter wave frequencies. In this paper, an RF MEMS shunt switch is designed with perforations and without perforations and simulated using iterative meanders for millimeter wave 5G applications. The proposed iterative...
Preprint
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The paper presents the comparative qualitative and quantitative analysis of twelve algorithms for training artificial neural networks (ANN) which predict the higher heating value (HHV) of biomass based on the proximate analysis (fixed carbon, volatile matter, and ash percentage). The twelve networks, with the same structure but different training a...
Article
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This paper presents two different types of micro channels namely one is cylindrical and the other is rectangular which are designed and simulated using FEM tool for the detection of cholera and diarrhea. Cholera is caused by vibrio cholera bacteria having dielectric constant 60 and Diarrhea is caused by E. coli bacteria having dielectric constant 4...
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This Paper Presents the design and simulation of RF MEMS switch taken on Microstrip patch antenna loaded with the circular type CSRR. The Tunability of the patch antenna is achieved when the two switches moves from upstate to down state arranged on the feeding line provided with the CPW. The actuation voltage required to move the switch downwards i...