Abstract: This paper presents a hybrid method, which combines Physical Optics (PO) and Method of Moment (MoM) techniques, to analyze the electromagnetic properties of wire antennas mounted on or near electrically large conducting surface with arbitrary shapes. The antenna and the irregular region are divided into MoM region and the other regular and continuous regions analyzed using PO method. An iterative method is proposed to improve the accuracy by considering the coupling among the elements in the PO region. The radiation and impedance properties of wire antennas are analyzed. Numerical examples are illustrated to show the accuracy and high efficiency.