Rank: 439 based on 293 downloads (last 30 days) and 8 files submitted
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Vasily Kozhevnikov

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Company/University
Tomsk State University
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56.46878, 84.94517

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Web-site http://phys.tsu.ru/~kozhevnikov

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Professional Interests:
plasma physics, CFD, numerical electromagnetics

 

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Files Posted by Vasily View all
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(last 30 days)
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29 Jan 2014 Screenshot 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov fdtd, 2d, te, tm, electromagnetics, upml 99 5
  • 4.8
4.8 | 8 ratings
25 Oct 2013 Screenshot Simulation of stable domain mode generation in Gunn diode Simulation of stable domain mode generation in Gunn diode Author: Vasily Kozhevnikov gunn diodes, microwaves, finite differences, euler method 19 0
  • 5.0
5.0 | 3 ratings
09 Oct 2013 Screenshot Microstrip line-fed rectangular antenna analysis using 3D FDTD code Microstrip line-fed antenna analysis is performed by the 3D FDTD Author: Vasily Kozhevnikov fdtd, lowpass filter, microwave, physics, signal processing, simulation 59 1
  • 5.0
5.0 | 3 ratings
16 Sep 2013 Screenshot Microstrip low-pass filter analysis using 3D FDTD code with UPML Microstrip low-pass filter analysis is performed by the 3D FDTD + UPML routine. Author: Vasily Kozhevnikov simulation, signal processing, physics, fdtd, microwave, lowpass filter 30 1
  • 5.0
5.0 | 2 ratings
16 Sep 2013 Screenshot Microstrip branch line coupler analysis using 3D FDTD code with UPML Microstrip branch line coupler analysis is performed by the 3D FDTD + UPML routine. Author: Vasily Kozhevnikov fdtd, branch line coupler, microwaves, physics, signal processing, simulation 41 2
  • 5.0
5.0 | 2 ratings
Comments and Ratings by Vasily View all
Updated File Comments Rating
05 Feb 2014 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov

Yes, L in [meters].
UPML FDTD for TE mode needs three Index matrixes due to the fact that in FDTD Ex, Ey and Hz have different space grids. You may apply single Index, but it'll cause distortions at low space resolution.
"My" implementation based on original Gedney's work http://dx.doi.org/10.1109/8.546249

19 Sep 2013 Microstrip branch line coupler analysis using 3D FDTD code with UPML Microstrip branch line coupler analysis is performed by the 3D FDTD + UPML routine. Author: Vasily Kozhevnikov

Add pause(0.01) after drawnow if the animation output is very fast on your PC.

19 Sep 2013 Microstrip low-pass filter analysis using 3D FDTD code with UPML Microstrip low-pass filter analysis is performed by the 3D FDTD + UPML routine. Author: Vasily Kozhevnikov

Add pause(0.01) after drawnow if the animation output is very fast on your PC.

08 Jan 2013 New ODE and DAE Solver Differential and algebraic equation solver for high-index, stiff, and mixed-integer systems. Author: John Hedengren

Comments and Ratings on Vasily's Files View all
Updated File Comment by Comments Rating
14 Feb 2014 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov jpadam

Thanks for the correction of the TE mode, everything works fine now !

05 Feb 2014 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov Kozhevnikov, Vasily

Yes, L in [meters].
UPML FDTD for TE mode needs three Index matrixes due to the fact that in FDTD Ex, Ey and Hz have different space grids. You may apply single Index, but it'll cause distortions at low space resolution.
"My" implementation based on original Gedney's work http://dx.doi.org/10.1109/8.546249

05 Feb 2014 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov arnold

great implementation, seems to work well.

L is in meters too, I guess.
I don't get why there are three indices, why should material 2 not be congruent in space for all three, doesn't make sense in my head.

Maybe it'd make sense to add the ability to give complex refractive index, many users of FDTD do optics only and might not be physicists :)

....oh and there is no paper to cite your implementation, so I can give it to my students, is there?

29 Jan 2014 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov Borisov, Alexey

05 Dec 2013 2D FDTD code with TF/SF interface and UPML absorbing borders Simple example implements FDTD + UPML + Total Field/Scattered Field interface Author: Vasily Kozhevnikov jpadam

Really nice and well written script. Ready to study the EM scattering of 2D structures.

However, I think there is a problem in the TE mode. I simulated a cylinder (just removed "&& (L(1)-I*dx<=J*dy", line 63) and observed that the Hz pattern isn't quite symmetric...

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