A5076335459- Advanced Semiconductor Detectors and Materials
- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Infrared Target Detection Methodologies
- Power Line Communications and Noise
- Electronic and Structural Properties of Oxides
- Wireless Communication Security Techniques
- Chaos-based Image/Signal Encryption
- Semiconductor materials and devices
- Ferroelectric and Piezoelectric Materials
- Quantum Dots Synthesis And Properties
- Advanced Wireless Communication Techniques
- Metal and Thin Film Mechanics
- Thermography and Photoacoustic Techniques
- Millimeter-Wave Propagation and Modeling
- Calibration and Measurement Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Electromagnetic Compatibility and Measurements
- Cognitive Radio Networks and Spectrum Sensing
- Additive Manufacturing Materials and Processes
- PAPR reduction in OFDM
- Photonic and Optical Devices
- Advanced Adaptive Filtering Techniques
- GaN-based semiconductor devices and materials
- Vehicular Ad Hoc Networks (VANETs)
NIMS University
2023-2024
Banaras Hindu University
2024
Indian Institute of Science Bangalore
2010-2023
Indian Institute of Technology Delhi
2020-2022
Chemnitz University of Technology
2020-2021
Solid State Physics Laboratory
2009-2019
Technische Universität Ilmenau
2012-2016
Oldenburger Institut für Informatik
2014
Constructor University
2009-2011
All India Institute of Medical Sciences
1999
The defect chemistry of polycrystalline has been studied by means the equilibrium electrical conductivity as a function temperature, oxygen activity, Sr/Ti ratio, and impurity additions. Reduction, excess , acceptor impurities all contribute to vacancy content their effects are therefore highly interdependent. effect added donor‐impurities,e.g., 500 ppm Nb, is dependent on presence amount .
Equilibrium electrical conductivity data for large‐grained, poly crystalline, undoped BaTiO 3 , as a function of temperature, 750° to 1000°C, and oxygen partial pressure, 10 −20 < P O2 <10 −1 MPa, were quantitatively fit defect model involving only doubly ionized vacancies, electrons, holes, accidental acceptor impurities. The latter are invariably present in sufficient excess control the concentrations through compensating except under most severely reducing conditions. Singly...
The effect of added Al, as an acceptor impurity, on the equilibrium electrical conductivity large‐grained, polycrystalline BaTiO 3 , is consistent with a previously proposed defect model which involves only doubly ionized oxygen vacancies, electrons, holes, and impurities. behavior extension that undoped in accidental net excess already plays important role. Comparison derived active content amount Al indicates <50% effective creating levels. magnitude small Po 2 ‐independent component,...
Information theoretic limits for random key generation in multiple-input multiple-output (MIMO) wireless systems exhibiting a reciprocal channel response are investigated experimentally with new three-node MIMO measurement campaign. As background, simple expressions presented the number of available bits, as well bits that secure from close eavesdropper. Two methods generating secret keys analyzed context channels and their mismatch rate efficiency derived. A wideband indoor campaign 2.51-...
Scanning electron microscopy and probe micro‐analysis were used to investigate the microstructure of both slow‐cooled quenched polycrystalline BaTiO 3 specimens with a small excess TiO 2 (Ba/Ti=0.995 0.999) or BaO (Ba/Ti=1.002 1.005). The micrographs polished etched ‐excess BaTiOs samples, fracture surfaces showed second phase in grain boundaries triple‐point regions, whereas no was observed samples having Ba/Ti=1.000. Microprobe analysis gave compositions near that reported adjacent higher...
We consider two approaches for real-time end-toend over-the-air testing intelligent traffic systems using virtual radio environments. One approach is based on coherent wavefield synthesis, while the other aims at emulating essential features of a realistic channel in vehicular ad-hoc networks. Due to finite hardware resources, former limited electrically small systems-under-test, latter suited typical vehicle-to-vehicle scenarios. Three major aspects emulation environments our facilities...
Abstract Cardiac rhythm regulated by micro-macroscopic structures of heart. Pacemaker abnormalities or disruptions in electrical conduction, lead to arrhythmic disorders may be benign, typical, threatening, ultimately fatal, occurs clinical practice, patients on digitalis, anaesthesia acute myocardial infarction. Both traditional and genetic animal models are: In-vitro: Isolated ventricular Myocytes, Guinea pig papillary muscles, Patch-Clamp Experiments, Porcine Atrial myocytes, muscle:...
The design and fabrication of gate/source connected multi-finger field plate structures using TCAD ATLAS simulation software is presented. designed are fabricated on indigenous AlGaN/GaN HEMT devices. devices with exhibit about three times improvement in breakdown voltage device close agreement the results. Integration plates have resulted higher VDS (drain to source voltage) operation output power Incorporation also decrease reverse leakage current
Abstract Software defined radios are increasingly used in modern communication systems, especially cognitive radio. Since this technology has been commercially available, more and practical deployments emerging its challenges realistic limitations being revealed. One of the main problems is RF performance front-end over a wide bandwidth. This paper presents an analysis mitigation impairments wideband front-ends for software radios, focussing on non-linear distortions receiver. We discuss...
There is growing interest in physical-layer key generation schemes that provide very strong or even perfect security wireless communication systems. One such scheme reciprocal channel generation, where two nodes quantize state information to generate keys. Although the use of multiple-input multiple-output (MIMO) techniques interesting this case since number random parameters available for rapid increased, MIMO may also more an eavesdropper. This work presents a new measurement campaign...