Abstract: On the basis of array model of the Multiple-Input Multiple-Output (MIMO) radar, a universal array model of the Synthetic Impulse and Aperture Radar (SIAR) is constructed and a realization sheme for microwave SIAR with a thinned subarray set for the transmitted array and a dense subarray set for the received array is proposed. Then a modified genetic algorithm (GA) with combined selection and double cross is employed in the optimization of the subarray position of bistatic SIAR antenna arrays to decrease the pattern’s sidelobe level with a fixed subarray number and a constant array aperture. Simulation results show that the modified GA raises the convergence velocity greatly with the maximum peak relative sidelobe level (RSLL) reaching -31.1dB, which meets the requirement of the project.

Key words: bistatic radar, microwave SIAR, synthesis of antenna array, genetic algorithm, MIMO radar