Raghuvir Tomar

Work place: Department of Electronics and Communication Engineerng, The LNM Institute of Information Technology, Gram Rupa-Ki-Nangal, Post-Sumel, Via Jamdoli, Jaipur 302031, India

E-mail: tomar_lnmiit@gmx.com

Website:

Research Interests: Microwave Technology, Microwave Photonics, Microwave Measurements

Biography

Raghuvir Tomar (born January 19, 1955) is a Professor in Electronics and Communication Engineering at The LNM Institute of Information Technology, India. He has coauthored more than fifty research papers on a wide variety of topics in the domain of electromagnetics and microwaves. He has about twenty-years of industry experience and more than ten-years of academic experience. Simulation and modeling of RF/microwave components, subsystems, and systems are one of his key passions. He is a Senior Member of the IEEE and a Fellow of the IETE (India)

Author Articles
A New MATLAB based Microstrip Filter Design Tool

By Shreyas Rao Raghuvir Tomar

DOI: https://doi.org/10.5815/ijwmt.2017.05.06, Pub. Date: 8 Sep. 2017

This paper presents a new MATLAB-based microstrip filter design tool. Stepped-impedance resonator lowpass filter, parallel-coupled bandpass filter, and end-coupled bandpass filter are included. Circuit-theory based closed-form mathematical expressions are used, instead of rigorous electromagnetic analyses. This results in significant reduction in analytical effort, without substantially affecting the accuracy. The results are verified against results obtained using commercially available Ansoft simulation tool. The agreement between the two sets of results is good enough for all practical purposes.

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Matlab-Based Computer-Aided-Design Algorithm for Designing Stepped-Impedance Resonator Low-Pass Filters in Microstrip Technology

By Luv Tomar Saurabh Gupta Raghuvir Tomar Prakash Bhartia

DOI: https://doi.org/10.5815/ijwmt.2015.01.01, Pub. Date: 8 Mar. 2015

An accurate MATLAB-based CAD algorithm for quickly designing microstrip-based stepped-impedance resonator (SIR) low-pass filter is reported. The algorithm uses a circuit-theory approach to implement speedy computations, compared to the time-consuming computations involved in using electromagnetic theory.
The accuracy of the proposed algorithm is verified for two widely-different practical examples in the 0-4GHz frequency range, against results obtained using Ansoft/Ansys circuit simulation tool, and against results obtained using the 3D electromagnetic simulator HFSS. The agreement among the three sets of data is seen to be excellent for most cases, and is found to be practically acceptable in the worst-case.

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