This is the users guide for angora, a software package that computes numerical solutions to electromagnetic radiation and scattering problems. Finite difference time domain or yees method named after the chinese american applied mathematician kane s. The name meep is an acronym for mit electromagnetic equation propagation who are the developers of meep. A flexible freesoftware package for electromagnetic. It is based on the finite difference time domain fdtd method, which one of the. We describe a complete interface, including the drawing of threedimensional objects, the generation of nonuniform and conformal mesh, interfacing with autocad and gid, and data postprocessing. These include treatment of planar stratifi ed and random. The time domain methods include the fdtd, the time domain integral. Finitedifference timedomain or yees method is a numerical analysis technique used for. Meep or meep is a free finitedifference timedomain fdtd simulation software package developed at mit to model electromagnetic systems, along with our mpb eigenmode package. The the computer architecture and performance of both numerical methods on the same design will be briefly described. Finite difference time domain simulation program integrated. Fullwave fdtd simulation software rsoft photonic device.
Finite difference time domain fdtd, englisch fur finitedifferenzenmethode im zeitbereich oder auch yeeverfahren bzw. Interactive, handson sessions will introduce participants to setting up and launching electromagnetic simulations using the stateoftheart finitedifference timedomain fdtd software package meep, originally developed at mit. Since it is a timedomain method, fdtd solutions can cover a wide. Meep fdtd package from mit that supports parallel processing. In this study, we used the generalized finitedifference timedomain gfdtd method developed by dai and moxley et al.
In this dissertation, two methods for improving finitedifference timedomain fdtd simulations of electromagnetic problems are presented. Basic instruction to learn more about meep please visit its homepage. It is based on the finite difference time domain fdtd method, which is one of the most popular approaches for solving maxwells equations of electrodynamics. Articles for deletionlist of finitedifference timedomain software. Finiteelement and finitedifference methods in electromagnetic scattering, m. We chose to use the gfdtd method not only because it is explicit and thus allows parallelization, but also because it provides highorder accuracy with relatively inexpensive computation. Generalized finitedifference timedomain method with. The fdtd method makes approximations that force the solutions to be approximate, i. Meep supports a wide range of electromagnetic design and modeling. Capoglu and di zhang, and is currently maintained by di zhang. It is a highly sophisticated tool for studying the propagation of light in a wide variety of photonic structures, including integrated and fiberoptic waveguide devices, as well as circuits and. Unlike afdtd, which is designed for radar signature analysis in the far field, nafdtd is an. Finite elementfinite difference programs type of software the effective properties of composites have been studied analytically for a long time, back to the days of maxwell, who first solved for the effect that a single spherical inclusion, with a different conductivity from the matrix, has on the overall or effective conductivity.
Allen taflove and finitedifference timedomain fdtd. A package for solving timedependent partial differential equations pdes, mathpde, is presented. How to install and use mits meep on a windows machine blog. These include treatment of planar stratified and random materials, the creation of current sources and incident beams, nearfield. It is based on the finitedifference timedomain fdtd method, which is one of the most popular approaches for solving maxwells equations of electrodynamics. Its features include simulation in 1d, 2d, and 3d cartesian coordinates, distributed memory parallelism on any system supporting the mpi standard, portable to any unixlike system, variuos dispersive. Angora is a free, opensource software package implementing the finite difference time domain fdtd method. However, the samples being simulated were limited to nondispersive media. Optiwave has been successfully developing fdtd software for over a decade, and would like to show appreciation to the photonics community by distributing its 32bit fdtd product as freeware. Optiwave has been successfully developing fdtd software for over a decade, and would like to show appreciation to the photonics community by distributing its. Meep or meep is a free finitedifference timedomain fdtd simulation software package developed at mit to model electromagnetic systems. The finite difference time domain method clemson cecas. This program is based on the finite difference time domain fdtd method and is related to the afdtd software. This this article explains how to access and use angora, and introduces its features.
We present the development of the graphical user interface of a conformal fdtd software package utilizing the visual basic programming language. Fdtd finitedifference timedomain if playback doesnt begin shortly, try. Meep is a free and opensource software package for electromagnetics. Methods for improving finitedifference timedomain fdtd. It is based on the finite difference time domain fdtd method, which one of the most popular approaches for solving maxwells equations of electrodynamics. N2 angora is a free, opensource software package implementing the finite difference time domain fdtd method. A finite difference time domain simulation package 1 angora. Mom and finite element method fem solvers are available in the same package to. The name meep is an acronym for mit electromagnetic equation propagation. Fullwave simulation tool employs the finitedifference timedomain fdtd method to perform a fullvector simulation of photonic structures. Meep or meep is a free finite difference time domain fdtd simulation software package developed at mit to model electromagnetic systems. After making a sequence of symbolic transformations on the pde and its initial and boundary conditions, mathpde automatically generates a problemspecific set of mathematica functions to solve the numerical problem. Application of the finite difference time domain code ema3d. The downfall of fdtd is when you need to refine the resolution a 10x refinement in grid spacing will typically result in a 1,000x increase in memory use and.
Finitedifference timedomain or yees method named after the chinese american applied mathematician kane s. Finite element and finite difference methods in electromagnetic scattering, m. Fdtd finite difference time domain if playback doesnt begin shortly, try. A free finitedifference timedomain fdtd electromagnetic. The present version z88aurora v4 offers, in addition to static strength analysis modules such as nonlinear strength calculations large displacements, simulations with nonlinear materials, natural frequency, static thermal analysis and a contact module. This article explains how to access and use angora, and introduces its features. Fourier finitedifference migration stanford university. Meep is a free and opensource software package for electromagnetics simulation via the finite difference time domain fdtd method spanning a broad range of applications. The time domain methods include the fdtd, the time domain integral equations, or the singularity expansion methods sem, the time domain fem. Combining finitedifference timedomain fdtd methods and modeling of optical microscopy modalities, we previously developed an opensource software package called angora, which is essentially a microscope in a computer. Simulation in 1d, 2d, 3d, and cylindrical coordinates. Gmes is a free python package for fdtd electromagnetic simulations. Meep is a free and opensource software package for electromagnetics simulation via the finitedifference timedomain fdtd method spanning a broad range. Interactive, handson sessions will introduce participants to setting up and launching electromagnetic simulations using the stateoftheart finite difference time domain fdtd software package meep, originally developed at mit.
This means that the calculation of the electromagnetic field values progresses at discrete steps in time. A finite difference time domain simulation package this is the users guide for angora, a software package that computes numerical solutions to electromagnetic radiation and scattering problems. Meep is a free and opensource software package for electromagnetics simulation via the finitedifference timedomain fdtd method spanning a broad range of applications. The analysis is compared with low level continuous wave llcw tests performed in the boeing lightning effects laboratory. The results obtained from the fdtd method would be approximate even if we used computers that offered in. Fidelity is a fdtd finitedifference timedomain based full3d em simulator for modeling microwave circuits, components, and antenna, wirelessrf antennas, emc and emi structures, and other highspeed and highfrequency circuitry. Angora is a free, opensource software package implementing the finite difference timedomain fdtd method. Yee, born 1934 is a numerical analysis technique used for modeling computational electrodynamics finding approximate solutions to the associated system of differential equations. Referenced in 9 articles software package for electromagnetic simulations by the fdtd method. It uses simple centraldifference approximations to evaluate the space and time derivatives. Meep or meep is a free finite difference time domain fdtd simulation software package developed at mit to model electromagnetic systems, along with our mpb eigenmode package. Understanding the finitedifference timedomain method. Its features include simulation in 1d, 2d, and 3d cartesian coordinates, distributed memory parallelism on any system supporting the mpi standard, portable to any unixlike system, variuos dispersive id models, u,cpml absorbing boundaries andor.
Angora is a free, opensource software package that computes numerical solutions to electromagnetic radiation and scattering problems. Angora is a free, opensource software package implementing the finitedifference timedomain fdtd method. Numerical solutions to maxwells equations in 3d, 2d, or 1d. Flexible script interface and supports parallel processing. The finite difference time domain method for electromagnetics. On the other hand, the frequency domain methods include the method of moments mom for solving the integral equations and the finite element method fem, for example. The finite difference time domain fdtd method as implemented in the commercial software package ema3d is used to model indirect lightning effects in a composite three bladed panel and a composite wingbox.
The finite difference time domain fdtd method, as first proposed by yee 1, is a direct solution of maxwells time dependent curl equations. It is based on the finitedifference timedomain fdtd method, which one of the most popular approaches for solving maxwells equations of electrodynamics. A package for solving time dependent partial differential equations pdes, mathpde, is presented. Combining finite difference time domain fdtd methods and modeling of optical microscopy modalities, we previously developed an opensource software package called angora, which is essentially a microscope in a computer. May 06, 2020 meep is a free and opensource software package for electromagnetics simulation via the finite difference time domain fdtd method spanning a broad range of applications. Electromagnetic simulation software finite difference time domain. It uses simple central difference approximations to evaluate the space and time derivatives. Fdtd finite difference time domain is a powerful and popular simulation method for photonics, and it will allow you to obtain initial results quickly for a large variety of structures.
Scaling coefficients, and, are complex and depend both on the ratio, and the ratio cv. Citeseerx development of graphical user interface for. Application of the finite difference time domain code. A free software package for finitedifference timedomain electromagnetic simulation ilker r. Since it is a time domain method, fdtd solutions can cover a wide frequency range with a single. Developed by active researchers and authors of a number of fdtd methodologies. In particular, we focus on aspects of implementing a fullfeatured fdtd package that go beyond standard textbook descriptions of the algorithm, or ways in which meep differs from typical fdtd implementations. Since the discussion happened, the proposed split list was created and then deleted see wikipedia. Development of a graphical user interface for the conformal. This paper describes meep, a popular free implementation of the finitedifference timedomain fdtd method for simulating electromagnetism. This report describes nafdtd, a nearfield finite difference time domain software package developed at the u. Umashankar, the finite difference time domain method for numerical modeling of electromagnetic wave interactions with arbitrary structures, chap.
Angora users guide finitedifference timedomain method. After making a sequence of symbolic transformations on the pde and its initial and boundary conditions, mathpde automatically generates a problemspecific set of mathematica functions to solve the numerical problem, which is essentially a system of. As of 20, there are at least 25 commercialproprietary fdtd software. Finitedifference timedomain fdtd is a numerical analysis technique used for modeling computational electrodynamics finding approximate solutions to the associated system of differential. Fdtd finitedifference timedomain is a powerful and popular simulation method for photonics, and it will allow you to obtain initial results quickly for a large variety of structures. A basic element of the fdtd space lattice is illustrated in figure 2. List of finite element software packages wikipedia.
A free software package for finitedifference timedomain. Gmes is a free finitedifference timedomain fdtd simulation python package developed at gist to model photonic devices. Nanooptical device design with the use of open source. Citeseerx development of graphical user interface for the. Finitedifference timedomain or yees method is a numerical analysis technique used for modeling computational electrodynamics. N2 angora is a free, opensource software package implementing the finitedifference timedomain fdtd method. Finitedifference timedomainbased optical microscopy. While many electromagnetic simulation techniques are applied in the frequencydomain, fdtd solves maxwells equations in the time domain. Umashankar, the finitedifference timedomain method for numerical modeling of electromagnetic wave interactions with arbitrary structures, chap. Photonics software with fdtd and fetd engine optical. Citeseerx document details isaac councill, lee giles, pradeep teregowda. This paper describes meep, a popular free implementation of the finite difference time domain fdtd method for simulating electromagnetism. Meep was originally developed as part of graduate research at mit.
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