This dataset compiles both simulated and measured electromagnetic results for a GAA antenna on polypropylene (PP) combined with different metaradome designs operating around 24 GHz for ETA radar applications. It includes S‑parameters and radiation pattern results obtained both in simulation and measurement for the antenna with and without the corresponding radome and metaradome protective covers with different metallization geometries. The collection provides a comprehensive reference for assessing the impact of metaradome configurations on antenna performance, and it includes a README document detailing the dataset organization.