2 layers82.4 × 89.4 mm

Antenna
ICDT-Inatel-Cubesat-Design-Team/S-Band-Antenna
S-Band RHCP 2.45 GHz Patch Antenna for 1U CubeSats
8 parts11CERN-OHL-W-2.0
KiCad boards from 2 GitHub repositories tagged “hfss”, the most starred first; open any of them in PCBKit.

ICDT-Inatel-Cubesat-Design-Team/S-Band-Antenna
S-Band RHCP 2.45 GHz Patch Antenna for 1U CubeSats

Blaze-Pascal/EKA-PiF-MIFA
2.4 GHz MIFA trace antenna design and simulation. Modeled using Ansys HFSS with Optimetrics sweeps to optimize geometry. Implemented on a custom 2-layer KiCad PCB using a coplanar waveguide.