A conformal circularly polarized (CP) series-fed microstrip array design for broadside radiation is presented. The array aperture under design is conformal to a cylindrical surface of a given radius. The approach we present primarily addresses focusing of the CP major lobe of the conformal array by proper dimensioning of the aperture spacings. The proposed analytical models yield the values of the element spacings within the series-fed conformal array aperture and element-specific spacings of the patch radiators within each CP element. These spacings are critical to produce a broadside CP major lobe at the design frequency. Subsequently, each array element is equipped with an in-line matching quarter wave transformer. The measured characteristics of the ${X}$ -band conformal array validate the proposed design approach.

中文翻译：

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一种共形圆极化串联馈电微带天线阵列设计

提出了一种用于宽边辐射的共形圆极化 (CP) 串联馈电微带阵列设计。设计中的阵列孔径与给定半径的圆柱面共形。我们提出的方法主要通过适当地确定孔径间距来解决共形阵列的 CP 主瓣的聚焦问题。建议的分析模型产生串联馈电共形阵列孔径内的元件间距值和每个 CP 元件内贴片辐射器的元件特定间距。这些间距对于在设计频率下产生宽边 CP 主瓣至关重要。随后，每个阵元配备一个在线匹配的四分之一波变换器。${X}$ 波段共形阵列的测量特性验证了所提出的设计方法。