【摘要】 介绍了一种工作频率为8～10 GHz的宽带高功率有源相控阵波束扫描天线阵列。该阵列由印刷在Rogers 6002介质基板上的对拓Vivaldi天线、隔离结构以及威尔金森功分器组成，一个一分四的威尔金森功分器、与功分器连接的四个对拓Vivaldi天线以及对应的隔离结构组成了一个阵列单元。通过采用Vivaldi天线，拓宽天线单元的阻抗带宽以及阵列单元的功率容量。通过设计电磁带隙隔离结构，提高了单元间的隔离度，以降低阵列单元的有源驻波比。通过对组成威尔金森功分器的分路处作圆弧过渡，提高了功分器的功率容量，从而提升阵列单元的功率容量。最终制造加工了圆形排布的32单元天线阵列并进行了测试。实验结果证明该天线阵列具有良好的有源驻波比。在微波暗室中测量了辐射方向图，证明了该天线阵列在40°范围内进行扫描时，不出现栅瓣且增益下降不到0.3 dB，显示出了其良好的波束扫描特性。更多还原

【Abstract】 This paper introduces a broadband high-power active phased array beam scanning antenna array operating at a frequency of 8～10 GHz.The array is composed of antipodal Vivaldi antennas,isolation structures,and Wilkinson power dividers printed on Rogers 6002 substrate.Each array element comprises a one-to-four Wilkinson power divider,four antipodal Vivaldi antennas connected to the power divider,and corresponding isolation structures.By employing Vivaldi antennas,the impedance bandwidth and power capacity of the antenna element are broadened.The isolation between elements is enhanced by designing an electromagnetic bandgap isolation structure,thereby reducing the active standing wave ratio of the array elements.The power capacity of the power divider is improved by introducing an arc transition at the branch junction of the Wilkinson power divider,which subsequently enhances the power capacity of the array elements.Ultimately,a circularly arranged 32-element antenna array is manufactured and tested.更多还原