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Lumped port help

Posted 2022年10月20日 GMT-4 06:55 1 Reply

Georgios Chatzidrosos
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Hello,

I am trying to simulate a simple model of a co-planar waveguide on top of a substrate, as seen in the attached file. Whenever I try to compute my result I get the error:

Uniform lumped port should be placed between two conductive boundaries. - Feature: Uniform Element 2 (ue2) - Feature: Uniform Element 1 (ue1)

I do not understand why that happens. I made sure to select the neighbouring boundaries as PEC and set up my Lumped ports based on option two from here: https://www.comsol.com/blogs/modeling-coplanar-waveguides

Could you kindly explain to me what I am doing wrong?

Best Georgios

1 Reply Last Post 2022年10月20日 GMT-4 11:49
Robert Koslover Certified Consultant
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Posted: 2 years ago 2022年10月20日 GMT-4 11:49
  1. Your PEC (set by default) zy planes at x = -2250 µm and x = +2250 µm are shorting out your lumped ports. So those planes should probably not be specified as PEC.
  2. There may still be other important issues in your model that need to be addressed, but fixing the above will eliminate the error message you reported.
-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
1. Your PEC (set by default) zy planes at x = -2250 µm and x = +2250 µm are *shorting out* your lumped ports. So those planes should probably not be specified as PEC. 2. There may still be other important issues in your model that need to be addressed, but fixing the above will eliminate the error message you reported.

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