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GEMS PC Version Ver. 3.51.33 |
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A GEMS PC version (single node, 32-bit code) can be downloaded by clicking on the link below. This version has full functions for 30 days.
Platforms:
Windows 32-Bit XP
Windows 64-bit XP
Windows 32-bit Vista
Windows 64-bit Vista
Windows 2000.
Windows 64-bit version, Linux version and multiple core support version are available upon request.
Cannot download the this demo? Please send your mailing address to gems@2comu.com to request GEMS CD with examples and electronic documents, and indicate operating system type and version number.
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Examples for GEMS PC version |
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All the examples here can be simulated by using a regular PC with 1 GB memory. A dual core or Quad code processor will speed up the simulation two to four times.
(1) Dipole antenna
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, far field output.
Purpose: Calculate far field pattern and Poynting vector and radiation power
Download project file now (PC version).
(2) Patch antenna
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, far field output, and reflection coefficient.
Purpose: Calculate reflection coefficient, microstripline excitation, far field pattern, and field distribution
Download project file now (PC version).
(3) Low pass filter
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, and reflection and transmission coefficients.
Purpose: Reflection and transmission coefficients, field distribution
Download project file now (PC version).
(4) Waveguide
Discription: PML boundary, port excitation, port voltage and current outputs, propagation constant, attenuation factor, and reflection coefficient.
Purpose: Port excitaion and port output
Download project file now (TE10, PC version).
Download project file now (TM11, PC version).
(5) Static RCS of PEC sphere
Discription: PML boundary, plane wave excitation, Huygens' box, RCS.
Purpose: Static RCS, plane wave excitation, time domain near to far field transformation
Download project file now (PC version).
(6) Bistatic RCS of dielectric sphere
Discription: PML boundary, plane wave excitation, Huygens' box.
Purpose: Bistatic RCS, plane wave excitation, frequency near to far field transformation.
Download project file now (PC version).
(7) PBC structure
Discription: PBC and PML boundaries, PBC plane wave excitation, periodic structure, reflection and transmission coefficients.
Purpose: PBC boundary condition, periodic structure, PBC plane wave
Download project file now (PC version).
(8) Dispersive medium
Discription: PML boundary, dispersive medium, plane wave excitation.
Purpose: Dispersive medium, RCS, plane wave excitation, Huygens' box
Download project file now (PC version).
(9) 2-D problem
Discription: PML boundary, plane wave excitation, 2-D problem, TE/TM wave.
Purpose: 2-D problem, 2-D RCS
Download project file now (PC version).
(10) GPS antenna
Discription: PML and PEC boundaries, coax feed, terminator (matched load), far field output, and reflection coefficient.
Purpose: Coax feed, far field pattern, and reflection coeffocient.
Download project file now (Coax feed, PC version).
Download project file now (Probe feed, PC version).
(11) Microwave coupler
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, and reflection and transmission coefficients.
Purpose: S-parameters
Download project file now (PC version).
(12) Circular horn antenna
Discription: PML boundary, terminator (matched load), port excitation, far field pattern.
Purpose: Port excitation, terminator (matched load), far field pattern.
Download project file now (PC version).
(13) Slot coupling
Discription: PML boundary, symmetric problem, plane wave source for the infnite structure, power transmission.
Purpose: power transmission, plane wave for infinite structure.
Download project file now (PC version).
(14) Special Absorption Rate (SAR)
Discription: PML boundary, SAR output,
Purpose: SAR calculation.
Download project file now (PC version).
(15) Anisotropic medium
Discription: PML boundary, Bistatic RCS,
Purpose:Anisotropic medium.
Download project file now. (project file)
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Download all 14 examples. (include *gpj and *.gpv files)
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GEMS Cluster Version Ver. 3.51.33 |
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A GEMS parallel version (four nodes) can be downloaded by clicking on the right link for the approved applicants only. This version is limited to 90 days. This version is for Windows system, and Linux version is available upon request.
To download the parallel version, the user needs to register to 2COMU ( My 2COMU -> Register) first, then send an email to sales@2comu.com. After we receive the request, we will send the user an email to confirm the request. After the user recieve the email, he can click on the right link to download the software.
After installing the GEMS Simulator, the user must run GEMS register to register the GEMS Simulator and get a license file from 2COMU to run the GEMS Simulator.
Platforms:
Windows 32-Bit XP
Windows 64-bit XP
Windows 32-bit Vista
Windows 64-bit Vista
Windows 2000.
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Examples for GEMS cluster version |
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All the examples here can be simulated by using a cluster with 4 nodes. They are designed for for 16 compute cores, 1 for the project assignment and result collection, and 15 for the simulation. If your cluster includes more or less number of cores, please change the number of processors in the parallel processing design window accordingly. All the other project options will be automatically adjusted according to the number of processors.
For the Windows users, you can setup the same account and password in each computer, and then create host name list and specify the host name of each computer.
For the Linux, you can submit job using GEMS WBI.
(1) Dipole antenna
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, far field output.
Purpose: Calculate far field pattern and Poynting vector and radiation power
Download project file now. (Cluster version)
(2) Patch antenna
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, far field output, and reflection coefficient.
Purpose: Calculate reflection coefficient, microstripline excitation, far field pattern, and field distribution
Download project file now. (Cluster version)
(3) Low pass filter
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, and reflection and transmission coefficients.
Purpose: Reflection and transmission coefficients, field distribution
Download project file now. (Cluster version)
(4) Waveguide
Discription: PML boundary, port excitation, port voltage and current outputs, propagation constant, attenuation factor, and reflection coefficient.
Purpose: Port excitaion and port output
Download project file now(TE10). (Cluster version)
Download project file now(TM11). (Cluster version)
(5) Static RCS of PEC sphere
Discription: PML boundary, plane wave excitation, Huygens' box, RCS.
Purpose: Static RCS, plane wave excitation, time domain near to far field transformation
Download project file now. (Cluster version)
(6) Bistatic RCS of dielectric sphere
Discription: PML boundary, plane wave excitation, Huygens' box.
Purpose: Bistatic RCS, plane wave excitation, frequency near to far field transformation.
Download project file now. (Cluster version)
(7) PBC structure
Discription: PBC and PML boundaries, PBC plane wave excitation, periodic structure, reflection and transmission coefficients.
Purpose: PBC boundary condition, periodic structure, PBC plane wave
Download project file now. (Cluster version)
(8) Dispersive medium
Discription: PML boundary, dispersive medium, plane wave excitation.
Purpose: Dispersive medium, RCS, plane wave excitation, Huygens' box
Download project file now. (Cluster version)
(9) 2-D problem
Discription: PML boundary, plane wave excitation, 2-D problem, TE/TM wave.
Purpose: 2-D problem, 2-D RCS
Download project file now. (Cluster version)
(10) GPS antenna
Discription: PML and PEC boundaries, coax feed, terminator (matched load), far field output, and reflection coefficient.
Purpose: Coax feed, far field pattern, and reflection coeffocient.
Download project file now(Coax feed). (Cluster version)
Download project file now (Probe feed). (Cluster version)
(11) Microwave coupler
Discription: PML and PEC boundaries, voltage excitation, voltage and current outputs, and reflection and transmission coefficients.
Purpose: S-parameters
Download project file now. (Cluster version)
(12) Circular horn antenna
Discription: PML boundary, terminator (matched load), port excitation, far field pattern.
Purpose: Port excitation, terminator (matched load), far field pattern.
Download project file now. (Cluster version)
(13) Slot coupling
Discription: PML boundary, plane wave source for the infnite structure, power transmission.
Purpose: power transmission, plane wave for infinite structure.
Download project file now. (Cluster version)
(14) Special Absorption Rate (SAR)
Discription: PML boundary, SAR output,
Purpose: SAR calculation.
Download project file now. (Cluster version)
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Download all 14 examples.(include *gpj and *.gpv files) |
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GEMS Patch |
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No patch avaliable now |
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Simulation Methods and Techniques ( 40 ~ 60 minutes, 169 pages ) |
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Table of contents
Chapter 1 Conformal FDTD Method
Chapter 2 Boundary Conditions
Chapter 3 Adaptive Mesh
Chapter 4 3-D Modeling
Chapter 5 Parallel Processing
Chapter 6 Web Based Interface (WBI)
Chapter 7 Data-post Processing
Chapter 8 Parameter Optimization
Chapter 9 GEMS Box System
Chapter 10 Hardware Acceleration Techniques
Chapter 11 Practical Examples
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Documents |
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Quick Start |
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Volume I: Installation Guide |
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Volume II: Modeling Guide |
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Volume III: Simulation Guide |
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Volume IV: Data-processing Guide |
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Volume V: Cluster Guide |
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Software Related References |
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Year 2008 |
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Wenhua Yu, X. Yang, Y. Liu, Lai-Ching Ma, T. Su, N. Huang and R. Mittra, "New Direction in Computational Electromagnetics Solving Large Problems Using the Parallel FDTD on the BlueGene/L Supercomputer Yielding Teraflop-Level Performance", IEEE Antennas and Propagation Magazine.(appear in issue 2, 2008) |
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Year 2005 |
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Wenhua Yu, Yongjun Liu, Tao Su, and Raj Mittra, "A Robust Parallel Conformal Finite Difference Time Domain Processing Package Using MPI Library," IEEE Antennas and Propagation Magazine, Vol. 47, June 2005, No. 3, pp. 39-59. |
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Year 2004 |
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Tao Su, Yongjun Liu, Wenhua Yu and Raj Mittra, "A New Conformal Mesh Generating Technique for Conformal Finite-Difference Time-Domain (CFDTD) Method," IEEE Antennas and Propagation Magazine, Magazine, Vol. 46, No.1, January 2004, pp.37-49. |
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Year 2003 |
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Wenhua Yu and Raj Mittra, "A Development Technique of Finite-Difference Time-Domain (FDTD) Software Package," IEEE Antennas and Propagation Magazine No.1, February 2003, pp.58-74. |
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Year 2000 |
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Wenhua Yu, Raj Mittra, "A Conformal FDTD Software Package for Modeling of Antennas and Microstrip Circuit Components,"IEEE Antennas and Propagation Magazine. Vol. 42, no. 5, pp. 28-39, October 2000. |
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