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How can I remove this error in wire meshing? [FEKO 2023.1 Version]

Hi , My probe radius is 5mm in my model, I tried using Fine /standard meshing option in my model, but for both cases, there is the same error msg "The ratio of probe radius to length is very large" . My model is attached here. Kindly check the model and

Kai_Fong_lee_case_1.cfx

help me to fix this error message in my simulation. Thanks in advance!

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Feko

v2023.1

Accepted answers

Jaehoon

If you'd like to consider the feeder wire's radius, you need to replace the wire with a 3D geometry (cylinder).

Please refer to the following steps.

Draw a cylinder. ← after deleting the wire feeder.
Region medium → Free space
Split the cylinder and union.
Apply the edge port. → Voltage source.

Best regards,

Jaehoon

All comments

Jaehoon

Hello,

Feko's wire segment mesh is based on the thin wire approximation. Therefore, the wire segment's radius should be smaller than the segment's length (Maybe 5~10 times smaller).

Please change the wire segment radius (5 → 0.001) in Modify mesh setting as shown below.

Best regards,

Jaehoon

sswh2

@Jaehoon sir, my requirement is my probe radius should be 5/2( 2.5) mm then how can I fix this issue? I can not change it thats the requirement, kindly tell me how can I fix this error then wthout creating proper cylindrical coax probe?

sswh2

@Torben Voigt sir can you help fixing this error? my probe radius should be 2.5mm

sswh2

@Jaehoon sir I can't change the radius thats the requirement then how can I fix the error?

Jaehoon

If you'd like to consider the feeder wire's radius, you need to replace the wire with a 3D geometry (cylinder).

Please refer to the following steps.

Draw a cylinder. ← after deleting the wire feeder.
Region medium → Free space
Split the cylinder and union.
Apply the edge port. → Voltage source.

Best regards,

Jaehoon

sswh2

@Jaehoon sir thanks, let me see how this cylinder effects my s11 .