I am having difficulties in designing stripline on cst. The reference impedance should be 50 ohms and it should be straight line at 50 ohms. Please guide what mistake I am making. I played with the width of the stripline, the impedance varies but it not straight line. Why it looks like a curve?
Thank you in advance.
Then if your simulation set up is correct, the variation can only be due to change in effective parameters of stripline with change in frequency, since you have used broadband solution setup. Ideally it should not be the case.
I am really stuck and not able to see what is the mistake, why my impedance is not 50 ohms and stable over the frequencies. Can you please check your message
Hi Meenakshi,
I don't know how well the parameters of PTFE are simulated in CST, but please have a look at Fig. 7 and Fig. 8 in this article which deals with measurement results:
Conference Paper Measurement Method for Detecting Magnetic and Dielectric Pro...
This might (at least qualitatively) explain your results.
A classical misunderstanding in this context: are you talking about a stripline or a microstrip? there is often confusion..(a microstrip is "open" ) For a microstrip as relevant parameters (char. impedance ; propagation constant) are frequency dependent since there we don't have a true TEM wave
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