chunweimin
Junior Member level 1
Hello,
I am trying to simulate an asymmetric CPW which consists of only a ground plane and a strip. The manual suggests that the port size should be about 3-5times wide of strip width. And it is trustable for conventional CPW and microstrip line structures. However, for this asymmetric CPW with the same strip width (W), there is a great difference on port impedance (around 40ohms) between using 3W and 5W port width. And it really matters when designing some line-impedance-sensitive components like couplers, filters .etc. Have you guys got any suggestions for how to objectively choose the port size for this structure? Thank you very much for your help!
Chunwei
I am trying to simulate an asymmetric CPW which consists of only a ground plane and a strip. The manual suggests that the port size should be about 3-5times wide of strip width. And it is trustable for conventional CPW and microstrip line structures. However, for this asymmetric CPW with the same strip width (W), there is a great difference on port impedance (around 40ohms) between using 3W and 5W port width. And it really matters when designing some line-impedance-sensitive components like couplers, filters .etc. Have you guys got any suggestions for how to objectively choose the port size for this structure? Thank you very much for your help!
Chunwei