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Aperture on Infinite Ground Plane

BabyEM

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Using HFSS 19.5, when I apply an APERTURE boundary to a 2D disk on an infinite ground plane defined by a PERF_E boundary I receive a warning that the two Boundaries overlap. Yet this is the configuration suggested in the manual.

1.) How and where do we assign an APERTURE boundary (to a 2D object)?

2.) How and where do we assign an infinite ground plane (to a metallic 2D object)?

3.) Are there specific requirements in setup that permit an overlap of these two Boundaries? (The manual shows assignment of APERTURE to an object on the infinite ground plane for both HFSS-IE and HFSS models -- though HFSS-IE is merge with HFSS in at least 19.5.)
 

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