An antenna array composed of four inclined microstrip Yagi antennas is proposed for a direction finding (DF) system operated in L band. Each element antenna is designed to have a tilted beam toward a central array axis in order to have high gain in the boresight axis of the antenna array. In comparison to a patch antenna array, having the same structure, antenna array gain is improved by a 2.3 dB maximum around the array axis, monopulse slope is increased by 72% and the linearity of the slope is improved significantly. Also, axial ratio is improved by 3 dB max within ±25° from boresight.

中文翻译：

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具有倾斜波束的圆极化微带八木天线阵列，可改善单脉冲特性

提出了由四个倾斜的微带八木天线组成的天线阵列，用于在L波段工作的测向（DF）系统。每个单元天线被设计成具有朝向中心阵列轴的倾斜波束，以便在天线阵列的视轴上具有高增益。与具有相同结构的贴片天线阵列相比，天线阵列增益绕阵列轴最大提高了2.3 dB，单脉冲斜率提高了72％，斜率的线性度得到了显着改善。而且，轴距在视轴的±25°范围内最大提高了3 dB。