An Antenna Far-field Prediction Method Based on Shooting and Bouncing Ray Method

The shooting and bouncing ray (SBR) method is a general and efficient estimation method for calculating the radar scattering cross-section of complex targets of electric universities. In this paper, the SBR method is used to analyze the distortion of the far-field directional map of the electric large platform antenna, and the far-field magnitude at each target observation angle is obtained by invoking the ray-tracking module’s ray magnitude tracking and ray phase tracking for calculation, then the antenna far-field is quickly calculated by collecting the field strength contribution of the rays at each target observation angle. This method overcomes the problem that needs to consume huge memory and computation time, and avoids the calculation frequency changes due to the algorithm and requires recalculation. The method was compared with a Cassegrain antenna excited by an 18 GHz horn antenna, and it was concluded that SBR greatly improved the computational efficiency of the antenna far field.