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At last, the simulation validates the theory analysis.
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In this paper, we deduce the frequency response of the system with respect to one dimensional scalar wave in free space, discuss the distortion of magnitude and phase, build the relation between frequency and attenuation and phase velocity, then reveal the effect of FDTD algorithm on signal and give the criterion to choose appropriate signal for simulation to avoid excessive distortion. So FDTD can be studied through the system. By this method, the characteristic of FDTD can be mapped into the characteristic of frequency response of a system. Ī characteristic analysis method for finite difference time domain (FDTD) based on frequency response is presented.
Journal of Electromagnetic Waves and Applications 24 (2-3) : 283-292. Characteristic analysis for FDTD based on frequency response.
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Frequency-independent human head modelsĬlick here to download instructions for obtaining free evaluation licenses from Zeland Software.Characteristic analysis for FDTD based on frequency responseĬhen, C.Y., Wu, Q., Bi, X.J., Wu, Y.M., Li, L.W. Yee, born 1934) is a numerical analysis technique used for modeling computational electrodynamics (finding approximate solutions to the associated system of differential equations). 
It also allows simulation of highly packed structures with lumped elements. Finite-difference time-domain (FDTD) or Yees method (named after the Chinese American applied mathematician Kane S. It saves a large amount of space and simulation time. Localized ports allow users to extract s-parameters in a small region.Without loosing accuracy, the simulation time is shortened by a factor of 20.
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The following time signals from a patch antenna indicate the difference.
Time signal convergence acceleration reduces the time marching steps significantly. The program automatically detects the convergence and stop a simulation at convergence. Automatic time signals convergence detection: Users do not need to guess how many time-steps they need to run simulations. Frequency-domain field calculation and display. Users can control the input power level and can access the parameters such as absorbed power and radiated power. Complete SAR-calculation and display: Colorful display of 3D SAR-distribution and Cartesian display of SAR-distribution. Plane-wave excitation for scattering and shielding investigation. One simulation yields results in a wide frequency spectrum. 3D electric field, magnetic field and Poynting vector display with slicing capability. The package includes the PatternView for pattern displays and comparison. Calculation of antenna directivity, gain, efficiency and other parameters. FREE FDTD SIMULATOR
The package includes a network simulator for flexible post-processing of s-parameters and impedance parameters.
Automatic s-parameter extraction allows accurate and fast calculation of s-parameters and input impedance. Integrated preprocessing and post-processing. Pre-defined coaxial port, microstrip port, rectangular waveguide port, circular waveguide port and user-defined port allow hassle-free port definition. 
Change of mesh does not need re-entry of the geometry. The mesh for the geometry can be changed anytime before a structure is simulated. OTTAWA, ONTARIO- (Marketwired - Feb 25, 2014) - Optiwave Systems Inc., the leading provider of optical component and system design tools, today announced the.
Automatic generation of non-uniform mesh and meshing independent geometry entry allows users to enter a structure once for different meshing schemes. Antenna structures can be modeled efficiently and accurately. Radiating boundary conditions modeled as various absorbing boundary conditions including PML. Multiple 2D and 3D views for better visual understanding of the structures in editing. Strong geometry editing and checking capability. Liveme hack is the popular App gets you into video chats with friends free. MS-Windows based, menu-driven graphic interface for interactive construction of planar and 3D structures as objects. Accept planar, 3D and non-isotropic dielectric materials. The mesh can be adjusted to fit a geometry. FREE FDTD SOFTWARE
Lumerical MODE lets you focus on ideas and product, instead of worrying about how the software can get you there. Create your model faster and with accuracy by employing Lumerical MODE.
Non-uniform mesh for modeling planar and 3D structures with complicated dielectric configuration. Lumerical MODE is a comprehensive optical waveguide design environment. Product Overview: FIDELITY FDTD-Based EM SimulatorįIDELITY is a FDTD (Finite-Difference Time-Domain) based Full-3D EM Simulator for modeling microwave circuits, components, and antenna, wireless/RF antennas, EMC and EMI structures, and other high-speed and high-frequency circuitry.
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