what is microstrip ant
I recently had to figure this out myself. There are several ways to get to the end result, but they're all heavily dependent on your antenna and milling machine.
I used a T-Tech milling machine with an outdated version of Isopro software. I’ll tell you how I would accomplish your problem using this software, and hope that it generalizes to your case.
If your antenna is a basic rectangle without any cut-outs or curves, then you can export a DXF of your patch layer from HFSS. Bear in mind that a DXF only takes a cross-section of the xy-plane at z=0. Open your milling software, and import the DXF, making certain that all of the units and trailing/leading zeroes match the HFSS output. Orient the imported patch to efficiently fit on your board. Words in quotes correspond to buttons in Isopro. Create an “isolation” layer using the tool size of the bit you plan to put in the machine. It’s important to use the right size because your antenna dimensions will be off by a few mils if you don’t. Create a “rubout” layer to show the milling machine what’s supposed to be cut away. “Initialize” the milling machine. Put your material on the mill, and make sure it’s secured with either pins or a lot of tape. “Run” the rubout layer, inserting the bit you specified earlier. If you need to drill holes for a through-hole coax feed, then you can switch bits and tell the machine to do it. Or you can just remove it and use a drill press.
For some reason, most CAD software can’t properly read curves from DXF files created with HFSS, so you’ll have to use another method. I assume that you probably have access to Ansoft Designer since you’re at a university (by the way, which one, if you don’t mind my asking?). Designer has no issues with curves from HFSS, so open Designer and create a new Planar EM design. I think you can directly import an HFSS geometry, but I generally just import a DXF. Next export a gerber of the layer with your patch, and import it into your milling software. Proceed as described above.
Without a detailed manual or an experienced user to guide you in person, the intricacies of milling are tricky at best. I recommend that you befriend a graduate student or a worker in your department’s machine shop who knows how to use the milling machine. Most of the graduate students will empathize with your situation if they’re not total jerks (or if they don’t have papers due the day you ask them).
Good luck.
Oh yeah, I don't quite understand what you were getting at with the "analog" in your title. Care to share?