Monte Carlo analysis of ridged waveguides with transformation media

Date

2013-07-01

Author

Ozgun, Ozlem
Kuzuoğlu, Mustafa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

249
views

0
downloads

A computational model is presented for Monte Carlo simulation of waveguides with ridges, by combining the principles of transformation electromagnetics and the finite methods (such as finite element or finite difference methods). The principle idea is to place a transformation medium around the ridge structure, so that a single and easy-to-generate mesh can be used for each realization of the Monte Carlo simulation. Hence, this approach leads to less computational resources. The technique is validated by means of various finite element simulations in the context of 3D waveguides of uniform cross-section. (c) 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2013.

Subject Keywords

Electrical and Electronic Engineering, Computer Graphics and Computer-Aided Design, Computer Science Applications

URI

https://hdl.handle.net/11511/44275

Journal

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING

DOI

https://doi.org/10.1002/mmce.20737

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Transformation-based metamaterials to eliminate the staircasing error in the finite difference time domain method Ozgun, Ozlem; Kuzuoğlu, Mustafa (Wiley, 2012-07-01) A coordinate transformation technique is introduced for the finite difference time domain method to alleviate the effects of errors introduced by the staircasing approximation of curved geometries that do not conform to a Cartesian grid. An anisotropic metamaterial region, which is adapted to the Cartesian grid and designed by the coordinate transformation technique, is constructed around the curved boundary of the object, and the region occupied between the curved boundary and the inner boundary of the ani...
Discretization of Parametrizable Signal Manifolds Vural, Elif (Institute of Electrical and Electronics Engineers (IEEE), 2011-12-01) Transformation-invariant analysis of signals often requires the computation of the distance from a test pattern to a transformation manifold. In particular, the estimation of the distances between a transformed query signal and several transformation manifolds representing different classes provides essential information for the classification of the signal. In many applications, the computation of the exact distance to the manifold is costly, whereas an efficient practical solution is the approximation of ...
Non-destructive recognition of dielectric coated conducting objects by using WD type time-frequency transformation and PCA-based fusion Sayan, Gönül (Wiley, 2013-07-01) This article demonstrates the applications of a non-destructive electromagnetic target recognition method, called Wigner distribution-principal component analysis (WD-PCA) method, to dielectric coated conducting spheres. These spheres are chosen to be highly similar having the same overall size but slightly different permittivity and thickness values in coating layers. Four different classifiers are simulated by using the WD-PCA method for varying sizes of object libraries under different noise conditions. ...
Nonlinear dynamic modeling of gear-shaft-disk-bearing systems using finite elements and describing functions Maliha, R; Dogruer, CU; Özgüven, Hasan Nevzat (ASME International, 2004-05-01) This study presents a new nonlinear dynamic model for a gear-shaft-disk-bearing system. A nonlinear dynamic model of a spur gear pair is coupled with linear finite element models of shafts carrying them, and with discrete models of bearings and disks. The nonlinear elasticity term resulting from backlash is expressed by a describing function, and a method developed in previous studies to determine multi harmonic responses of nonlinear multi-degree-of-freedom systems is employed for the solution. The excitat...
Effects of using different boundary conditions and computational domain dimensions on modeling and simulations of periodic metamaterial arrays in microwave frequencies Turkmen, Oznur; EKMEKÇİ, Evren; Sayan, Gönül (Wiley, 2013-07-01) This article aims to demonstrate the effects of using different boundary conditions and different computational volume dimensions in numerical simulations of periodic metamaterial arrays. A double band metamaterial unit cell design will be utilized to show that use of different boundary conditions may result in simulation of dissimilar periodic array topologies with completely different electromagnetic responses. It will also be shown that dimensions of the computational volume may strongly affect the overa...

Citation Formats

O. Ozgun and M. Kuzuoğlu, “Monte Carlo analysis of ridged waveguides with transformation media,” INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, pp. 476–481, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44275.