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  1. J

    A Method For Simulating Switched Charged Conductors

    Just in case anyone else is interested in the subject of simulating switched charged conductors (with "conventional" EM simulators that lack an explicit capability for it), I found a paper describing a general technique for a work-around method here.
  2. J

    Issues With CST Eigenmode Solvers

    Has anyone been using the Eigenmode solvers in CST MWS 2011? Successfully? I wanted to check out the new solver that uses a tetrahedral mesh, so I simulated a helical resonator with it, thinking a helix would be a good structure to test tetrahedral meshing. After about 30 minutes of spinning...
  3. J

    Anyone have the ability (e.g., systran or other installed s/w) to translate a pdf?

    Hello, I'm wondering if anyone can translate a pdf written in Chinese? I tried using Google translate, but it messes up the formatting so much as to make the translation basically useless. Maybe an installed version of Systran will work better? The pdf is attached if someone won't mind...
  4. J

    Has anyone used the transient solver in HFSS v13?

    I'm trying to find out: Will HFSS v13 directly simulate switched charged conductors, where you would specify a static voltage on a conductor somewhere as an initial condition for example? Does anyone know?
  5. J

    Maxwell 14 - Simple 2D Electrostatic Problem - What's wrong with the field plot?

    Just to do a quick test of Ansoft Maxwell 14, I decided to run a very simple 2D problem from the v12 User's Guide - a coaxial capacitor - in a "cylindrical about Z" geometry. Following the steps in the guide, I set up and ran the problem...which took only a few minutes...and got the correct...
  6. J

    Dissipation Factor For Ceramic Capacitors With Y5U Dielectric

    I'm trying to estimate the power losses in a voltage multiplier built with cheap ceramic capacitors (which I believe are designated as "Y5U"). Unfortunately, the only spec I've been able to find on dissipation factor is < 2.5% @ 1.0 kHz. But what is it at 10 kHz or 20 kHz? Does anyone have any...
  7. J

    Looking For Info On Coaxial (TEM) Horn Antennas

    Does anyone know of any papers on the subject of a coaxial horn antenna (e.g., analysis, design) such as that depicted in fig. 2 of the following linked paper? Thanks. https://www.cpdee.ufmg.br/~fernando/artigos/eucap09.pdf
  8. J

    HFSS v13 - has it been released yet?

    Does anyone know if HFSS v13 has been released yet? (Supposedly v13 includes a new time domain solver).
  9. J

    Linear induction accelerators made from pulse-line cavities [...]- paper by Ian Smith

    I'm wondering, can anyone get the following paper? Thanks. Rev. Sci. Instrum. 50, 714 (1979); doi:10.1063/1.1135905 (5 pages) Linear induction accelerators made from pulse-line cavities with external pulse injection Ian Smith
  10. J

    XFDTD v7 - How user friendly is it?

    I experimented with an earlier version of it a few years ago, and as I recall it was generally cumbersome and not very intuitive. I'm wondering, is v7 any better? How user friendly is the geometry editor?
  11. J

    CST Question: Polarity of Discrete [voltage] Port Terminals

    With regard to pulse excitation by way of a Discrete [Voltage] Port in CST, does anyone know which terminal (i.e., which side of the "arrow") is positive (or negative)? I can't seem to find this information in any of the documentation.
  12. J

    Free ebook: FE Methods for Electromagnetics

    Just in case anyone's interested, here's a link to a free book by Field Precision: https://www.fieldp.com/femethods.html
  13. J

    Can semcad simulate switched charged conductors?

    Question About Semcad Hello, Does anyone know if Semcad can simulate switched charged conductors, e.g., a blumlein pulse generator? Regards, jpsmith123
  14. J

    CST PIC Solver Questions involving field emission

    CST PIC Solver Questions Has anyone done anything with the PIC solver in CST Particle Studio, particularly involving field emission? If so maybe someone can enlighten me as to a few things that I don't quite understand? In the example problem "field emitter tip", under "2D/3D Results", the...
  15. J

    How do I get CST MWS to calculate an inductance?

    I've got a relatively simple coaxial structure for which I want to determine the approximate inductance. I thought that if I excite it with a voltage pulse using a discrete port and select "Monitor voltage and curent" (under port properties), there would be some post-processing template that...
  16. J

    Ansoft Maxwell vs. CST EMS

    ansoft vs. cst Just in case anyone else is interested... Well I decided to make a spark gap switch using some round graphite rod material for electrodes, and I wanted to see what the E-field would look like, i.e., what kind of field enhancement would result if I merely rounded the edges to a...
  17. J

    Ansoft Maxwell 3D v12 User Guide

    ansoft maxwell 3d I'm wondering, does anyone have the latest Maxwell 3D user guide? Thanks.
  18. J

    What exactly is an "out of memory error" in CST?

    32 bit cst out of memory I got that error from the electrostatic solver in EMS while using tetrahedral adaptive meshing. I'm hoping someone can explain what it means. Thanks.
  19. J

    CST error: "invalid monitor settings"?

    I just simulated an E field problem in EM Studio (using adaptive tetrahedral meshing), and when I went to view the field results, it sat there for about 30 seconds "working", and then gave me the "invalid monitor settings" error message. Has anyone else run into this problem before? Thanks.
  20. J

    Where to get cheap USB optoisolators?

    Hello, Does anyone know if there are any cheap (say less than $50 USD) USB optoisolators available anywhere? Thanks. Regards, jpsmith123

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