CST 2026. Open a NEW blank MWS project and run one model.bas macro. Geometry/settings only: solver does NOT start automatically. Single 1.6 mm FR4 PCB, ideal balanced 50 ohm gap port, no SMA, no balun, no filter. Exploratory hex20; not converged or measured. Source: 20260921-balanced-radiator-v3. These are baseline controls, not a publication-ready design.
