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liletian

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how to simulate the effect of 1mm copper for reflection in HFSS?
Nov 11^th, 2010, 12:53pm

Hi guys
Can anyone suggest some ways to simulate the effort of a 1mm copper connection with two 100 ohms impedance source at frequency 300MHz. I want to connect two 100 ohms impedance source directly together, but in real PCB, there always have a copper line which is about 1mm. Can anyone suggest ways to simulate the copper line effect using HFSS?
Thanks a lot

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RFICDUDE

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Re: how to simulate the effect of 1mm copper for reflection in HFSS?
Reply #1 - Nov 11^th, 2010, 6:17pm

1mm of copper is only about 1nH of effective inductance if the line is narrow (a wide line will be less). 1nH is less than 2ohms of reactance at 300MHz, but the capacitance might be more of an issue if the width of the trace is very wide.

1mm of line length is not of much concern at 300MHz I think.

You could model the line in Sonnet or Momentum with good results too.

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liletian

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Re: how to simulate the effect of 1mm copper for reflection in HFSS?
Reply #2 - Nov 11^th, 2010, 7:07pm

RFICDUDE wrote on Nov 11^th, 2010, 6:17pm:

1mm of copper is only about 1nH of effective inductance if the line is narrow (a wide line will be less). 1nH is less than 2ohms of reactance at 300MHz, but the capacitance might be more of an issue if the width of the trace is very wide.

1mm of line length is not of much concern at 300MHz I think.

You could model the line in Sonnet or Momentum with good results too.

any suggestions on the simulation? I am using HFSS.
thanks

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