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Thanks for the replies, they helped a lot.
Another question, if I have a current source instead of a voltage source, do I consider the current source as a short or open circuit when calculating the output impedance? An example of such a configuration is attached
thanks!
Rogers 4000 or Duroid?
Hi,
I am just wondering, is there a special reason (other than the different dielectric constants) why a circuit designer would prefer to choose Rogers 4000 series rather than Duroid based materials? I am asking because they both seem to work well at high frequencies...
thank you for all your replies.
the bottom pad of the SMAs do not have relief, hence are soldered directly to ground plane
i will redesign the microstrip and test it again. hopefully it'll be better this time round.
many thanks again for all the helpful comments. appreciate it
the vector network analyzer was calibrated up to 20 GHz with the cables used in the S21 measurement.
hmm, about the ground being detached from the top plane, it was not because of any logical reasonreally. just put things without much thought. should the top plane be ground as well?
thanks...
Hi all,
Hope someone can help me with this problem. I'm designing a simple microstrip but when I made an S21 measurement, I could not get a flat frequency response up to 10 GHz. Microstrip design and S21 measurement are attached. The microstrip dimensions are as below:
72 mil width
30 um thick...
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