Tile Resolution in WinProp Standard Ray Tracing

JM_21554

Hello,

I have a few questions regarding the Tile Resolution for Standard Ray Tracing in ProMan

1. what is the effect of changing this value and how large should it be set?
2. does this value depend on the selected Resolution of prediction results?
3. and can this value be meaningfully selected depending on the object size in the project?

Thank you very much!

Zeina

Hi JM,

For the SRT model, the scattered contribution of each tile is weighted with its size (scattering area). The size of the tile will have an impact on the range of possible reflection angles for each given tile. For short distances, there is an impact due to the modified scattering angles which depend on the tile size. But for objects at large distance from the source, the resulting scattered power from the whole object is independent of the tile size.

The size of the tiles will depend on the size and geometry of your object in a way to account for geometry changes. It is not related to the resolution of the prediction results.

Best,

Zeina

JM_21554

Zeina said:

Hi JM,

For the SRT model, the scattered contribution of each tile is weighted with its size (scattering area). The size of the tile will have an impact on the range of possible reflection angles for each given tile. For short distances, there is an impact due to the modified scattering angles which depend on the tile size. But for objects at large distance from the source, the resulting scattered power from the whole object is independent of the tile size.

The size of the tiles will depend on the size and geometry of your object in a way to account for geometry changes. It is not related to the resolution of the prediction results.

Best,

Zeina

Hi Zeina,

thanks for your answer.

Is there a rule of thumb for how large the tile resolution should be? (For example, I want to do some simulations at 77 GHz with a wire mesh fence. This has a mesh width of approx. 5 cm. I have chosen a tile resolution of 0.6m, is this value OK or should it be chosen differently?)

 

And is there only one backscattered path per tile possible or also several?

Thank you very much!

 

Best Regards,
Julian

Zeina

JM_21554 said:

Hi Zeina,

thanks for your answer.

Is there a rule of thumb for how large the tile resolution should be? (For example, I want to do some simulations at 77 GHz with a wire mesh fence. This has a mesh width of approx. 5 cm. I have chosen a tile resolution of 0.6m, is this value OK or should it be chosen differently?)

 

And is there only one backscattered path per tile possible or also several?

Thank you very much!

 

Best Regards,
Julian

Hi JM,

Can you share a schematic of your model? I do not clearly see where exactly the tiles you've mentioned are in the geometry. Is the 5cm of mesh width the physical "empty-spacing" between the wires of your fence?

Best Regards

Zeina

JM_21554

Hi Zeina,

 

thanks for your answer!

 

After your explanation I've noticed, that my example with the fence was a bad choice.

Yes, the 5 cm of mesh width is filled with "empty space".

 

I did some research on the tile resolution in the WinProp User Guide. Together with your explanation I think I've understood the division into tiles and segments.

 

Thank you very much for your help!