一种平面印刷电控波束扫描天线阵

摘要

A novel planar beam steering parasitic array of planar printed dipoles is proposed, which can be used in the mobile terminals to improve communication quality and system capacity. The main beam can be controlled by the reactive loads on the parasitic elements. The antenna prototype is designed using the software based on the full wave analysis and the loaded reactance values are optimized by the Differential Evolutionary (DE) algorithm. The measured results show that the main beam can be steered from-34°~38° in the xoy plane. At every main radiation direction, the gain at the center frequency is from 3.6~4.9 dBi and the bandwidth of the reflection coefficient less than-10 dB is 330 MHz, which is from 5.63~5.96 GHz. The proposed antenna has good beam steering performance and the optimum design method is accurate and efficient.%该文设计了一种平面印刷偶极子波束扫描寄生阵列天线，可用于移动终端设备以提高通信质量和系统容量。通过改变加载在寄生单元中的电抗值可以控制天线的最大辐射方向。天线基本结构用电磁场全波软件设计，所需加载的电抗值通过差分进化算法(DE)优化得出。实测的天线主波束方向在xoy平面内-34°~38°之间扫描；在各方向上，中心工作频率上的增益在3.6~4.9 dBi之间变化，反射系数小于-10 dB的频带在5.63~5.96 GHz之间，带宽为330 MHz。实测结果表明，天线具有良好的波束扫描性能，采用的设计和优化方法准确高效。