一种结构紧凑的新型微带单脉冲天线阵

A Novel Compact Microstrip Monopulse Antenna Array

该文提出了一种新的“十”字型微带结构单脉冲天线和差网络。用这种网络成功地设计并加工了微带单脉冲阵列天线。这个天线阵由 4个 8× 8幅度为均匀分布的微带天线子阵组成。和差网络和天线阵处于同一平面 ,因而具有结构紧凑、简单 ,加工方便和成本低的优点。根据实测结果 ,水平方向的和方向图与差方向图均与理论预估吻合良好 ,表明和差网络的设计是成功的。如果天线阵的幅度分布按低副瓣设计 ,则也可以用在微带低副瓣天线阵上。分析和实测都表明 ,这种天线阵还具有比常规天线阵带宽更宽的优点。

A novel compact microstrip monopulse antenna array with cross type comparator has been proposed and designed.This array is composed of four 8×8 microstrip antenna subarrays with uniform amplitude distribution.The comparator and the antenna array are located on the same layer resulting in the advantages of being simple, compact, easy manufacturing and low cost. The good agreement between the experimental results and the theoretical simulations on the vertical sum and difference patterns shows that the design of the comparator is successful. This comparator may also be used in the low side lobe level array with the corresponding current distribution. Both analysis and experiments also show that this array possesses the wider frequency bandwidth than that of the conventional one.