【摘要】 以往的阵列综合方法不能在获得高的方向性系数的同时保证外部噪声占优,不能用于超方向性阵列综合.本文提出了一种新的阵列综合方法,该方法适用于任意阵列形式,以最大化阵列方向性系数为目标,通过对阵列效率的约束保证了外部噪声占优的条件,并通过迭代控制了方向图的旁瓣,实现了阵列效率和旁瓣约束下的方向性系数最优化,很好地满足了超方向性阵列综合的要求.对多种阵列的综合结果表明了这种方法的有效性和灵活性.更多还原

【Abstract】 The existing pattern synthesis method can’t be used for superdirective array antennas for they can’t ensure the dominance of external noise as well as keep high array directivity.A new pattern synthesis method which can be applied to superdirective arrays is presented.It can also be applied to arbitrary array geometries.The dominance of external noise is ensured by constraining the array efficiency,and the desired sidelobe level is achieved by implementing linear constraints through iteration.By optimizing the array directivity subject to array efficiency and sidelobe constraints,the highest possible directivity with controlled array efficiency and desired sidelobe level is achieved,and the requirement on superdirective array synthesis is satisfied.The simulation results of different arrays show that the proposed method is very effective and flexible.更多还原