I am new to CST as well as PCB milling. I tried exporting a antenna simulation from CST as a gerber file. ISOPRO does not register the aperture list for some reason. All it shows is D999 with 0 width.
I also tried to view the gerber file using McCAD. Again McCAD shows an empty aperture table. Any ideas why this is happening.
I'm currently designing a 180 degree compact rat-race hybrid coupler for butler matrix network. I divided my rat-race into 8 sub-structures : 4 t-junctions, 2 bends and 2 straight lines. I've already obtained the results for each part of my sub-structure. But now i'm not sure how to combine the structures so that i can obtain the output for the whole rat-race hybrid coupler that is 180 degree phase difference. I'm aware of exporting the sub-structures to DXF file format but i am not sure which environment or how is the step to combine it and get the combined rat-race hybrid coupler output.