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How should I choose the minimum length of wedges for standard ray tracing?

Hello,

I wanted to ask what exactly the minimum length of wedges under "Handling of diffractions" in ProMan is all about.

1. which effects does this value have?
2. is there a minimum and maximum limit for the selection of the value that must not be exceeded?
3. how does the choice of the value depend on the object sizes and the frequency in my project (I want to do some simulations at 77 GHz with a wire mesh fence. This has a mesh width of approx. 5 cm. Do I have to take this into account when choosing the wedge length?)

Many thanks for your help in advance!

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English

v2022.3

WinProp

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Reiner_Hoppe

Hello,

wedges smaller than the defined value for "minimum length of wedges" will be discarded for the propagation analysis i.e. neglected.
The default value of 0.01m should be also fine for 77 GHz as just a few wavelengths.

JM_21554

Hallo Reiner,

vielen Dank, das hilft mir schon einmal viel weiter!

Ich verstehe nur nicht ganz, wie man sich die Wedges an einem Objekt vorstellen kann. Ich habe im WinProp User Guide die angehängte Abbildung gefunden, unter der das Ray-Tracing erläutert wird. Wie kann man hier die Wedges annehmen?

Vielen Dank und beste Grüße!

Julian

Tiles and Wedges.png

Reiner_Hoppe

Hallo Reiner,

vielen Dank, das hilft mir schon einmal viel weiter!

Ich verstehe nur nicht ganz, wie man sich die Wedges an einem Objekt vorstellen kann. Ich habe im WinProp User Guide die angehängte Abbildung gefunden, unter der das Ray-Tracing erläutert wird. Wie kann man hier die Wedges annehmen?

Vielen Dank und beste Grüße!

Julian

Hi Julian,
let us better switch to English, so others can also profit from the exchange.

The wedges are typically given at neighbouring polygons e.g. in case of a building when two walls come together there is a vertical wedge or between vertical wall and horizontal roof there is a horizontal wedge.
For more complex objects like a car there are many more wedges at the curved structure, but always and the boundary of neighboring elements (polygons).

Best regards,

Reiner Hoppe