【摘要】 稀布天线阵列阵元数少、造价低、方向性强,共形天线阵列不影响飞行器的空气动力学性能,而稀布共形天线阵列兼备稀布阵和共形阵的优点。采用遗传算法对半球面和锥台面两种共形天线阵列进行稀疏优化,可达到减少天线阵元数目、节约成本以及降低方向图旁瓣电平的目的。通过MATLAB仿真比较不同稀疏率下的旁瓣电平,最终实现了半球形天线阵列在稀疏率为50%时最大旁瓣电平降低了5.506 dB,锥台形天线阵列在稀疏率为70%时最大旁瓣电平降低了6.08 dB。更多还原

【Abstract】 The sparse antenna array has fewer elements, low cost, and strong directivity. The conformal antenna array does not affect the aerodynamic performance of the aircraft. The sparse conformal antenna array combines the advantages of the sparse array and the conformal array. The genetic algorithm is used to sparsely optimize the two conformal antenna arrays of hemisphere and frustum to achieve the purpose of reducing the number of antenna elements, saving costs, and reducing the sidelobe level of the pattern. Through MATLAB simulation, comparing the sidelobe levels under different sparsity rates, it is finally realized that the maximum sidelobe level of the hemispherical antenna array is reduced by 5.506 dB when the sparsity rate is 50%, and the maximum sidelobe level of the frustum-shaped antenna array is reduced by 6.08 dB when the sparsity rate is 70%.更多还原