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Too many conductors touch lumped port

hank_the_wolf

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I have designed the following circuit. It's supposed to be a low pass microstrip filter and a 50 ohm microstrip transmission line. Individually, each work with wave ports. However, I need to use lumped ports because I can't get accurate readings from the wave ports being the size I need them to. (I need to put them very close together for cross talk) The only conductors are the traces and the reference plane. The integration line I set goes from the top of the reference plane to the top of the two lines (the conductors are boxes .012 ish mm thick.)

When I put the lumped ports together (red sheets), I get the following error messages:
 

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  • Error.JPG
    Error.JPG
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PlanarMetamaterials

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Is the picture showing the lumped ports, or the wave ports? Lumped ports, as far as I know, should only exist in between the conductors.

However, I need to use lumped ports because I can't get accurate readings from the wave ports being the size I need them to. (I need to put them very close together for cross talk)

I would still use wave ports. Use only 2 ports, such that each port covers both microstrip lines. Change the simulation type to driven terminal and assign one terminal per port to each of the lines.
 

vfone

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An Edge port would work also..
Remove existing ports, Select Edges, Add Port..
 

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  • Edge_Port.jpg
    Edge_Port.jpg
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