Research on the optimal design method of array element distribution and frequency offset based on frequency diverse array-multiple input multiple output

The antenna pattern of Frequency Diverse Array-Multiple Input Multiple Output (FDA-MIMO) is not only affected by the array element distribution but also related to the frequency offset, but the ideal design effect cannot be achieved only by relying on one of the array element distributions and frequency offset. Based on this, this paper studies a sparse array FDA scheme using the improved genetic algorithm to optimize the array element distribution and frequency offset. The simulation results show that compared with Log-FDA and GAO-FDA, the antenna pattern of the sparse array FDA scheme optimized by the genetic algorithm for array distribution and frequency offset has a narrower main lobe, and its side lobe level also performs well. The performance of this sparse array FDA scheme is significantly better than that of Log-FDA and GAO-FDA.