not-yet-known not-yet-known not-yet-known unknown This paper proposes a novel broadband wide scanning angle phased array antenna. The antenna elements are fed from the bottom via a coaxial feed, with an impedance matching network formed by a coaxial-to-stripline transition that couples to a ”I-shaped” slot antenna. The signal is transmitted through two differently sized SIW cavities, with stripline structures printed on the upper surface of the cavities to adjust the antenna’s radiation characteristics. Finally, a metasurface-based wide-angle impedance matching (MS-WAIM) layer is employed to enhance the beam scanning capability while reducing the antenna profile. The proposed element demonstrates dual-resonance behavior, with a VSWR of less than 2 across 46% of the simulated bandwidth (7.8-12.4 GHz). To form the array, adjacent elements’ open cavities are connected. When scanning in the H-plane to ±60°, the array achieves approximately 39% bandwidth (7.9-11.8 GHz) with an effective VSWR less than 2. To validate the design, a 4×4 array prototype was fabricated. In the H-plane, when scanning to ±60°, the array exhibits a bandwidth of about 38.7% (7.9-11.75 GHz), with an effective VSWR less than 2.