aperture coupling in ads

can anyone tell me how an aperture can be created in a substrate layer using ads.......so that a microstrip antenna can be fed by aperture coupling technique....plz

This is bit complicated for beginners.
Are you beginner or expert in Momentum modeling?

PS:
I mean you need more guidance if beginner.

i just tried to use a layer called hole and made it a via in the substrate layer......and changed its property to be freespace by changing permitivity..........is this right or is there any other procedure........but am not getting any changes in results.....

PS:
am not an expert but have designed many other multi-layered structures using ads

You can use any layer but must be properly set in the substrate definition.

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