Abstract: This paper introduces a novel idea for designing a phase array microstrip antenna element with low coupling and wide beam scan capabilities. Consisted of two-layers patches separated by an air gap and fold grounds, the proposed antenna element has a simple structure. In order to minimize the array gain drop due to the limited antenna beam width, the proposed antenna is designed to expand the half-power beam width as far as possible with fold grounds structure. At the same time, in order to reduce the distortion of antenna element pattern caused by mutual coupling, some methods are proposed for reducing the mutual coupling to make sure satisfy the product theorem of antenna pattern as much as possible. Moreover, a prototype of the proposed antenna and a linear array are fabricated and measured. The measured results show that the wide angle scanning array is capable of scanning up to ± 70° along with stable gain characteristics. Meanwhile, the proposed antenna is a classical antenna which can be used for 5G applications ranging from infotainment solutions to consumer devices.