宽带平面微带贴片天线阵设计

在分析了一种结构简单且具有宽带特性的双层贴近耦合微带贴片天线的基础上,通过计算阵列单元间E面和H面的互耦效应,确定了合适的阵元间距,并采用简单的T型等分功分器组成并联馈电网络,实际制作并测试了一个8×8元宽带平面天线阵。天线阵中心频率f0=12.5GHz,阻抗带宽大于16.0%(驻波比VSWR<2.0),增益大于22.5dB。这种结构的平面天线阵在卫星通信等领域应用前景广阔。

Design on Broadband Planar Array of Microstrip Patch Antenna

Based on the analysis of simple and broadband coupling mierostrip patch antenna with dual-layer, the spacing between every two elements is selected through calculating the mutual coupling. We implement and test a broadband planar array with 8 × 8 elements, which is fed by parallel feed net comprised of simple T type power distributors. The test results show that the bandwidth is more than 16.0% （VSWR 〈 2.0） and the gain is more than 22.5dB when the center frequency of planar array is 12.5GHz. Such array will be widely used in satellite communications.