A5046863504- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Electromagnetic Scattering and Analysis
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Measurements
- ZnO doping and properties
- Electromagnetic Simulation and Numerical Methods
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Energy Harvesting in Wireless Networks
- Full-Duplex Wireless Communications
- Ultrasonics and Acoustic Wave Propagation
- Spectroscopy Techniques in Biomedical and Chemical Research
- Microwave and Dielectric Measurement Techniques
- Microwave Imaging and Scattering Analysis
- Wireless Body Area Networks
- Ultra-Wideband Communications Technology
- Radio Astronomy Observations and Technology
- Digital Filter Design and Implementation
- Image and Signal Denoising Methods
- Chalcogenide Semiconductor Thin Films
- Radio Wave Propagation Studies
- Advanced MIMO Systems Optimization
Indian Institute of Technology Kharagpur
2016-2025
Indian Institute of Technology Indore
2005-2025
Syracuse University
2006-2011
Central Glass and Ceramic Research Institute
2003-2007
Broadband antennas are very useful in many applications because they operate over a wide range of frequencies. The objective this paper is to study the transient responses various well-known broad frequency ranges. As such, phase these as function great interest. In ensuing analysis, each antenna excited by monocycle pulse. Many show resonant properties, and numerous reflections exist antennas' outputs. first part deals with ways converting resonating traveling-wave using resistive loading....
Frequent monitoring of blood glucose levels is an essential part diabetes care, but the invasiveness current devices deters regular measurement. Noninvasive measurement techniques are painless to implement and rely on changes in sample properties estimate concentration. However, such methods affected by presence different biomolecules, resulting increased estimation error necessitating calibration obtain accurate concentration estimates. The use photoacoustic spectroscopy for continuous...
Near infrared photoacoustic spectroscopy is utilized for the development of a continuous non-invasive glucose monitoring system diabetics. A portable embedded taking measurements on tissues to estimate concentration implemented using field programmable gate array (FPGA). The back-end architecture high-speed data acquisition and de-noising operates at 274.823 MHz Xilinx Virtex-II Pro FPGA. measurement technique verified in vitro solutions vivo tissues, with signal amplitude varying linearly...
The use of near infra red (NIR) photoacoustic spectroscopy (PAS) for continuous non-invasive glucose measurement is outlined in the paper. A (PA) apparatus was constructed and PA measurements were made on solutions at multiple NIR excitation wavelengths. variety time frequency domain features, including amplitude area based extracted from measurements. These features observed to be proportional concentration sample. samples whole blood different concentrations showed similar results....
In this paper, the concept of transmission phase shift an impendance-matching network (IMN) has been introduced. The generalized two-port parameters matching circuit, which matches arbitrary complex load to a different source impedance incorporating phase, derived. general, IMNs are electrically asymmetric; however, there exist only two distinct values shifts (180° apart) for given and networks symmetric, irrespective choice design topology. Simple examples symmetric like single parallel...
Low-complexity, high-speed and re-configurability are the primary requirements of finite impulse response (FIR) filters employed for processing acquired seismic signal in real-time seismic-alert-system. The common sub-expression elimination (CSE) technique is widely to reduce hardware complexity by minimizing logic operators (LOs) depths (LDs) digital FIR filter. In this brief, a novel matrix grouped CSE (MCSE) algorithm has been proposed which outperforms existing algorithms terms LOs LDs...
In this paper, we look at the characterization of far-field regions antennas located over a ground plane. For radiating in free space, far field starts distance 2L <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /λ, where L is' effective size antenna, and λ is wavelength. The question now if same antenna placed height H plane, then does that start? goal paper to demonstrate for with either polarizations 2H /λ (here, ≫ L). We illustrate...
The objective of this paper is to investigate a methodology, which can extract approximate results for the free space radiation pattern from non-anechoic measurements. Using an impulse response both in time and angular domains measurement environment, device under test estimated. purpose is, as opposed what has been stated some papers, show that deconvolution based technique feasible reflection compensation proposed method also be applied at single frequency illustrated paper. Simulated data...
Design and development of broadband thin multilayer microwave-absorbing materials (MAMs) are described in this paper. analysis single-, two-, three-, four-layered MAM covered detail. CoCr-based U-type hexaferrite MAMs Ba <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> (Co xmlns:xlink="http://www.w3.org/1999/xlink">1-3x</sub> Cr xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> ) xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Fe...
This paper presents the analysis and effects of frequency diversity on finite uniform circular array for generation range dependent Orbital Angular Momentum (OAM) modes. The reveals that factor expression in terms Bessel's function a with no. elements possess phase error azimuthal domain at any transverse plane due to which dependency OAM modes is affected. In this report detailed distribution concentric circles an exact without considering assumption or approximation has been carried out....
There has been a plethora of papers dealing with wireless communication that use techniques, which when viewed from the perspective Maxwellian framework raise more questions than they answer. By we imply not only relevance electromagnetics in studying systems but also proper interpretation an ensemble processing mathematical physics was first introduced by Maxwell to study behavior aggregate molecules rather property individuals. Initially, most modern signal techniques developed for scalar...
Broadband characterization of any electromagnetic (EM) data (e.g., surface currents, radiation pattern, and network parameters) can be carried out using partial information in the time domain (TD) frequency (FD). In this hybrid TD-FD approach, one generates early response a TD code at spatial location uses FD to generate low-frequency same place. Then, complementary both is fit by set orthogonal functions its Fourier transform having expansion coefficients. Three different types functions,...
A systematic approach to synthesize multiport ( N-port) network with desired characteristics, for a given topology, has been proposed. The heart of the algorithm lies novel port decomposition technique introduced here, wherein reduced two-port (2PN) is obtained by short-circuiting remaining N-2 ports original topology. This easily analyzed in terms its unknown design parameters and can be compared known characteristics provide subset equations. Iteratively proceeding this approach, one...
Artificial magnetic conductor as a ground plane realized by split ring resonators is proposed to improve the strength of radiating fields along from horizontally oriented dipole antenna placed close it. Simulation results show that although gain can be improved, but its performance valid over an extremely narrow bandwidth. However, much higher than when it operating in free space. Hence, design such systems attention must paid tradeoff between and bandwidth artificial conductor.