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Recent content by qrs90

  1. Q

    RF motion detector for humans/animals

    Re: RF motion detector Is there any reason you want to use RF? If you just need a simple setup that will tell when something passes, why not use an IR LED and a simple receiver? This would be easier than going to a 10GHz microwave frequency setup. This would work for people and animals just...
  2. Q

    radiation boundary setup

    Hello, I am looking to setup some antenna simulations. I know how to define the radiation boundary box correctly, but I am unsure of how to set the infinite sphere parameters to define the radiation boundary. What should be entered into the angle fields, and what about the step size? An...
  3. Q

    Loss tangent DECREASES with frequency???

    As the conductivity goes to infinity, you get only surface currents -- no current flows inside the actual medium. When you use PEC approximations to solve emag problems you are allowing for Js on the surface -- these surface currents are only realizable on PEC surfaces.

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