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reduce your dimensions significantly and try again, if there is still you have done with wrong unites or wrong templates, check your unite setting and try another template with larger bounding box and different boundary conditions...
thanks @johnjoe for your help
it was related to excitation pulse and a material of structure and i solved it,:lol:
but for your question , no there was no error or warning in the messages box but the residual energy remaining in the end of simulation was high (it wasn't below -10 dB)
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in 1D plot properties in plot mode tab, there is an option "parametric plot" to plot a different parametric plot based what parameter that you define and swept it
hope this be helpful
in the field monitor choose farfield/RCS , but you can set the distance of the measurement plate from the origin in the rightdown part of setting window for farfield/RCS, so you can choose your distance for near field simulation, then after simulation finished you can see the power radiated in...
thanks @volker for your helpful comment
yes, actually the residual energy is high, but how can decrease this?
i start simulation with increasing number of pulses to 100 and time to 70, but still there is much residual energy in the structure ?
I am simulating in terahertz (THz) range which source resistance is high (>10 Kohms), I want to obtain S-parameters and input impedance but i saw that in some frequencies the amount of S-parameters are larger than 0 dB and real part of input impedance is also negative.
i think they are not...
I'm not sure about your result but it is more correct from me :)
but I didn't use any waveguide port to check broadband for inhomogenous waveguide port , i think it is only for use of waveguide port not discrete port which used in this structure
I'm highlighting the negative resistance, maybe you do it with finer mesh???
what do you do in a Mix 1DC results in post processing?
or what i should do to give the same result?
yes I know that but it differ slightly when i change reference impedance from 10K to 35K, but now i have another problem :(
when i saw the real part of input impedance in Z-Matrix i observed that in some frequencies the real part is negative, i can't understand it?
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thanks @redcrystalline for your help
but i have problem with that, when I change the impedance of a discrete port (for example form 50 ohms to 300 ohm) then the input impedance of what CST shows change too !!! i think input impedance should be constant and only...
use the CST MWS instead of optical one,
in optical because the frequency is extremely high the wavelength is low and number of mesh will be a really a lot
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