基于频率分集阵列的波束形成研究

A Study on the Beam Forming of Frequency Diverse Array

传统的相控阵列通过在每个阵元的输出接入移相器进行波束方向变换,通过调整移相器的相位范围,实现空域的波束扫描。频率分集阵列通过在每一阵元输出引入频率偏差,从而得到与传统相控阵不同的波束特性。文中对频率分集阵列的波束特性进行了详细的分析,提出了频偏相关波束概念,论证了频率分集阵列波束在空/时/频域扫描的等效性。仿真结果进一步验证了频率分集阵列的波束特性。

Unlike conventional phased array, the beam forming of frequency diverse array （ FDA ） is achieved using the frequency diversity by inserting a small amount of progressive frequency offset to each antenna element. In this paper, the radiation properties of FDA are first analyzed. Based on the frequency offset dependent property, a frequency-offset dependent beam is proposed by properly selecting a set of frequency offsets. Simulation results demonstrate the beam scanning characteristic of FDA.