Radiation Characteristics of a Two-Dimensional Radome-Enclosed Phased Array Antenna

The radiation characteristic of a two-dimensional radome-enclosed phased array antenna based on physical optics is studied in this paper.The radiation field of the antenna is calculated using analysis method first.Under assumptions of locally planar radome surface,the tangent electromagnetic field and the equivalent electric and magnetic currents on the radome outer surface are calculated according to the physical optics.The 2D integral formulas of radiation of the equivalent currents are deduced from the 3D formulas and the surface-integration method is employed to obtain the far-field radiation formulation for the radome-enclosed antenna finally.Numerical examples validated the accuracy and efficiency of the offered method.Based on this,the effects on the antenna radiation characteristics caused by changing the antenna's phase excitation and radome parameters are also calculated and analyzed.