Search Results - "Venkatarayalu, N.V."
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Removal of spurious DC modes in edge element solutions for modeling three-dimensional resonators
Published in IEEE transactions on microwave theory and techniques (01-07-2006)“…When using edge element basis functions for the solution of eigenmodes of the vector wave equation, "dc spurious modes" are introduced. The eigenvalues of…”
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Journal Article -
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Optimum design of Yagi-Uda antennas using computational intelligence
Published in IEEE transactions on antennas and propagation (01-07-2004)“…Optimization of Yagi-Uda antennas is a challenging design problem, since the antenna characteristics such as gain, input impedance, maximum sidelobe level…”
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Journal Article -
3
A Stable FDTD Subgridding Method Based on Finite Element Formulation With Hanging Variables
Published in IEEE transactions on antennas and propagation (01-03-2007)“…The finite-element time-domain (FETD) method based on the use of hanging variables to generate nested grids is used as an interface between the coarse and fine…”
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4
Application of Hybrid FETD-FDTD Method in the Modeling and Analysis of Antennas
Published in IEEE transactions on antennas and propagation (01-09-2008)“…The stable hybrid finite-element time-domain-finite-difference time-domain (FETD-FDTD) method is applied for the numerical modeling and simulation of radiation…”
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General formulation of unconditionally stable ADI-FDTD method in linear dispersive media
Published in IEEE transactions on microwave theory and techniques (01-01-2004)“…The unconditionally stable alternating-direction-implicit-finite-difference time-domain (ADI-FDTD) method is used to model wave propagation in dispersive…”
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Journal Article -
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Multilayer dielectric filter design using a multiobjective evolutionary algorithm
Published in IEEE transactions on antennas and propagation (01-11-2005)“…Design of multilayer dielectric filters involve the identification of suitable dielectric material and appropriate thicknesses of the layers that best…”
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Journal Article -
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Numerical modeling of ultrawide-band dielectric horn antennas using FDTD
Published in IEEE transactions on antennas and propagation (01-05-2004)“…A detailed characterization of the input impedance of ultrawide-band (UWB) dielectric horn antennas is presented using the finite-difference time-domain (FDTD)…”
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Journal Article -
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On the numerical errors in the 2D FE/FDTD algorithm for different hybridization schemes
Published in IEEE microwave and wireless components letters (01-04-2004)“…Numerical experiments are carried out to study the accuracy of the two-dimensional Finite-Element/Finite-Difference Time-Domain (FE/FDTD) hybrid algorithm with…”
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9
FEM modeling of axisymmetric cavities with divergence-free constraint equation and hierarchical basis functions
Published in 2009 Asia Pacific Microwave Conference (01-12-2009)“…Development and implementation of efficient divergence-free constraint equation in the FEM modeling of axisymmetric cavities using hierarchical higher order…”
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Conference Proceeding
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Characterization, calibration and macromodeling of RF current probes
Published in 2009 Asia Pacific Microwave Conference (01-12-2009)“…Characterization of a current probe by measuring three port S-parameters with the probe clamped to a calibration fixture is presented. A simple calibration…”
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Conference Proceeding -
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Simulation of electromagnetic radiation and scattering using hybrid higher order FETD-FDTD method
Published in 2007 IEEE Applied Electromagnetics Conference (AEMC) (01-12-2007)“…The stable hybrid finite element time domain - finite difference time domain (FETD-FDTD) method is extended by incorporating higher order hierarchical basis…”
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Conference Proceeding -
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Single and multi-objective design of Yagi-Uda antennas using computational intelligence
Published in The 2003 Congress on Evolutionary Computation, 2003. CEC '03 (2003)“…Design of Yagi-Uda antennas is a challenging problem since antenna characteristics such as gain, input impedance, maximum sidelobe level etc., are known to be…”
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Conference Proceeding -
13
Fast monostatic RCS computation in FEM based solvers using QR decomposition
Published in 2006 First European Conference on Antennas and Propagation (01-11-2006)“…A technique to reduce computational time in problems involving monostatic RCS computation using the finite element method is presented. In scattering problems,…”
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Conference Proceeding -
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Impedance characterization of dielectric horn antennas using FDTD
Published in IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313) (2002)“…In this paper, we perform a detailed study of the input impedance of dielectric horn antennas with a two conical plate transmission line as a launcher, using…”
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Conference Proceeding -
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Suppressing linear time growth in edge element based finite element time domain solution using divergence free constraint equation
Published in 2005 IEEE Antennas and Propagation Society International Symposium (2005)“…Edge elements have been a popular choice of basis functions for the solution of Maxwell's equations using the finite element method. When applied in time…”
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Conference Proceeding -
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Antenna modeling using stable hybrid FETD-FDTD method
Published in 2007 IEEE Antennas and Propagation Society International Symposium (01-06-2007)“…The hybrid FETD-FDTD method in Rylander, T. and Bondenson, A. (2002) retains the efficiency of FDTD method in modeling simple geometries while using…”
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Conference Proceeding -
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