A Two-Stage Machine Learning Framework for Predicting and Validating the Structural and Beam Characteristics of a Wideband Switched-Beam Antenna. - Pichaya Chaipanya; Worakan Noimi; Saraichat Wintachai; Supakpawee Wisetlertmongkol; Nuchanart Santalunai; Samran Santalunai (IEEE Access, 2026)