Amplitude-Only Synthesis of Multi-Subaperture Antenna Array by Nonlinear Least-Square Method

摘要

An improved nonlinear least-square method is presented to the synthesis of multi-subaperture antenna array for SAR application. This method changes the traditional nonlinear least-square method's shortness of being sensitive to its initial value. The whole aperture and the subapertures can generate different radiation beams. Also, the whole aperture and the several subapertures can work simultaneously. The mathematical model of nonlinear least-square method is given and the amplitudes of the array elements are optimized The Peak Side Lobe Level (PSLL) is controlled effectively. The simulation results show the feasibility and effectiveness of the presented method in the synthesis of array antenna.