These are a few HFSS designs (for different substrates). They don’t contain the results, so they will need to be re-solved. We ended up using the Rogers AD1000 120mil substrate. The thickness was incorrectly modeled as 125mil, but it was close enough. Because the band is so narrow, the patch size had to be adjusted with copper tape, measuring S11 at a port on a VNA and trying to move its resonance to 433 MHz.

Under Project > Project Variables, the parameters can be changed. Patch_XY is the length and width of the patch, and Sf is the distance from the edge of the patch to the pin location. See the diagram also in the folder. 