I want to design a microwave absorber and in order to evaluate the performance I need absorbance v/s frequency plot. Kindly assist me.
I also want to know that do I need to consider S-parameters because mathematically absorbance is given by, A=1-|R|-|T| and if owing to ground surface we say T-->0. Thus, A=1-|R|. R is given by magnitude of S11.
That's why I wondering to know that is it possible to analyze the absorbance v/s frequency plot in CST or I need to calculate manually undertaking the |R|.
Hi Amarveer,
I think you should be able to find absorbance in post processing tabs,
but if CST doesn't calculate automatically, then you can use reflectance and transmittance from post processing and then write an equation and calculate absorbance manually
good luck!
Okay and the equation is A=1-|S11|^2-|S21|^2. Am I right ?
Thank you for your assistance.
Reflectance is |S11|^2, but transmittance is not. You should use optical illuminance concept. I suggest you check optics references to understand the relation between transmittance and |S21|^2
Go to the add variable option while plotting the graphs, there u can put the expression of Y axis according to ur need, as 1-Is11I^2-Is21I^2 and keep the sweep variable as frequency...
we can find it in below path :
Post processing => Result Templates Tools =>
General Results:
General 1D =>
Add new post-processing step .. :
1d(c)=> 1D(c)
f(x,y) : desired formula ...
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