Design and Implementation of a 1 × 4 Bow-Tie Antenna Array Integrated with a Butler Matrix for Switched-Beam ISM-Band Applications. IJPAP [Internet]. 2026 Jul. 15 [cited 2026 Jul. 15];64(7). Available from: https://or.niscpr.res.in/index.php/IJPAP/article/view/29976