filarmonik
Newbie level 3
Hello,
I have a very simple questions about plane wave excitation in HFSS. My question is more about using radiation boundary and plane wave excitation, and I need someone's approve.
In the model, I create a box which is air box, and I assign radiation boundary for all surfaces of the box. Then, I select one of the surfaces and I do Assign Excitation>Incident Wave>Plane Wave... Then, I analyse the model and I find very nice plane wave propagation.
My questions are:
1) I read a lot about radiation boundary on the web, they say that the nearest distance between radiation boundary and the simulation structure should be λ/4. However, in my case it is not λ/4. It is even on the radiation boundary.
Also, when I created another structure (box, plane, sphere...) inside of the air box and assigned it to Plane wave excitation in the same way, HFSS gives me error, it says 'Adaptive solution, process hf3d error: Failure in mesh verification'. I make the air box bigger and played with mesh, and I got the same result.
Do you have any idea what causes this problem or does my first model seems right?
2) When there is nothing inside of my air box, why do I still get some scattered field? (Excitation>Edit Sources>Scattered Field) even the box is vacuum. That is quite strange for me. Because there is nothing comparable with the wavelength. Can it be because of the radiation boundary condition?
Thanks
filarmonik
I have a very simple questions about plane wave excitation in HFSS. My question is more about using radiation boundary and plane wave excitation, and I need someone's approve.
In the model, I create a box which is air box, and I assign radiation boundary for all surfaces of the box. Then, I select one of the surfaces and I do Assign Excitation>Incident Wave>Plane Wave... Then, I analyse the model and I find very nice plane wave propagation.
My questions are:
1) I read a lot about radiation boundary on the web, they say that the nearest distance between radiation boundary and the simulation structure should be λ/4. However, in my case it is not λ/4. It is even on the radiation boundary.
Also, when I created another structure (box, plane, sphere...) inside of the air box and assigned it to Plane wave excitation in the same way, HFSS gives me error, it says 'Adaptive solution, process hf3d error: Failure in mesh verification'. I make the air box bigger and played with mesh, and I got the same result.
Do you have any idea what causes this problem or does my first model seems right?
2) When there is nothing inside of my air box, why do I still get some scattered field? (Excitation>Edit Sources>Scattered Field) even the box is vacuum. That is quite strange for me. Because there is nothing comparable with the wavelength. Can it be because of the radiation boundary condition?
Thanks
filarmonik