Abstract: A low-profile phased antenna array with wideband wide-scan characteristics has been proposed. An aperture coupled feed mechanism and dual-layer radiating patches have been adopted to achieve wideband impedance matching. Due to the piled dielectric slabs, the performance of microstrip patch antenna arrays is normally deteriorated by surface waves and higher-order spurious modes when scanning up to large angles for the high frequencies. To solve this issue, the stacked slabs have been perforated to suppress surface wave propagation, and thus improving the impedance matching property for the high frequencies. Additionally, the performance in the lower band has been further improved by designing two pairs of parasitic strips without increasing the antenna profile. The thickness of the array is only 4. 6 mm,which is around 0. 19λh (λh refers to the wavelength at the high end of the operating frequency in free space), indicating the good potential for low-profile applications. The simulation results confirm that the proposed array antenna has obtained a relative bandwidth of 57. 9% for ±45°scanning with active voltage standing wave ratio (VSWR) ≤ 2. 25 and a relative bandwidth of 44. 4% for ±60°scanning with active VSWR ≤ 2. 75. An 8×8 prototype array has been manufactured and an array model has also been built to validate the experimental results. The measured results including active VSWR and radiated patterns are in good consistency with the simulated results of finite array, demonstrating the wideband and wide-scan properties of the patch antenna array.