A dual-band shared-aperture phased array antenna with wide-angle scanning capability (WASC) is presented in this paper for mobile communications. Each shared-aperture antenna element consists of two wideband microstrip antenna units with air-cavity for the C -band and one wide beam magnetic-electro dipole antenna unit for the S -band. To achieve the wide-angle scanning, a phased array should have low inter-element mutual coupling and wide array-element beam-width. A simple metallic strip (MS), comprising four metal stubs and one rectangle shaped metal pillar, is utilized to improve the inter-element isolation of the array in and between the C - and S -bands. Furthermore, the metal strip can also broaden the beam-width of the C -band antenna units without distorting the wide-beam property of the S -band units. The shared-aperture array with a simple metallic strip is designed based on the above elements, and WASC is realized in both the C - and S - bands with low mutual coupling. To verify the proposed method, the shared-aperture array is fabricated and characterized, yielding good performance within the overall operating bandwidth. The measured results align very well with the simulated. The proposed array realizes the scanning coverage of ±60° with realized gain reduction of less than 3 dB in both the C - and S -bands, which is a good candidate for the base station in the mobile environment.

中文翻译：

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一种用于移动系统应用的具有广角扫描能力的双频段共享孔径天线

本文介绍了一种用于移动通信的具有广角扫描能力 (WASC) 的双频段共享孔径相控阵天线。每个共享孔径天线单元由两个带气腔的宽带微带天线单元组成C -band 和一个宽波束磁电偶极子天线单元，用于 秒 -乐队。为了实现广角扫描，相控阵应该具有低元件间互耦合和宽阵列元件波束宽度。一个简单的金属条 (MS)，包括四个金属短截线和一个矩形金属柱，用于改善阵列内部和之间的阵列的元件间隔离。C - 和 秒 -乐队。此外，金属条还可以加宽光束的宽度C - 波段天线单元不会扭曲宽波束特性 秒 -波段单位。基于上述元素设计了具有简单金属条的共享孔径阵列，并在两者中实现了WASCC - 和 秒 - 低互耦频带。为了验证所提出的方法，制造并表征了共享孔径阵列，在整个工作带宽内产生了良好的性能。测量结果与模拟结果非常吻合。所提出的阵列实现了±60°的扫描覆盖范围，并且在两种情况下都实现了小于3 dB的增益降低C - 和 秒 -bands，这是移动环境中基站的良好候选。