A one-dimensional (1-D) ultra-wideband conformal connected slot array with reduced scattering characteristics is presented. The proposed array accomplishes a practical design completely conformal to a wing platform by closely attaching the antenna aperture to the curved surface. A conformal metamaterial absorber (CMA) structure is employed to control the out-of-band scattering, and the resistive patches are analyzed for the reduction of radiation loss. Additionally, a parasitic metal block is introduced for the improvement of VSWRs in the low-frequency band. The designed 1-D infinite array is able to achieve 4:1 impedance bandwidth from 0.5 to 2.0 GHz with an active VSWR <3.0 for scanning up to ±45°. In comparison with the reference array, a significant monostatic scattering reduction is achieved from 6.0 to 18.0 GHz with the radiation performances well preserved. The overall thickness of the conformal array is only about 0.31λ_h at the highest operating frequency. A 2 × 8 conformal array prototype is fabricated and measured. Measured results are in good agreement with simulated ones, thus demonstrating effectiveness.

中文翻译：

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具有减少散射的一维共形超宽带连接缝隙阵列

提出了一种具有减少的散射特性的一维 (1-D) 超宽带共形连接槽阵列。所提出的阵列通过将天线孔径紧密连接到曲面，实现了与机翼平台完全共形的实用设计。采用共形超材料吸收器 (CMA) 结构来控制带外散射，并对电阻贴片进行分析以减少辐射损耗。此外，还引入了寄生金属块以改善低频段的 VSWR。设计的一维无限阵列能够在 0.5 至 2.0 GHz 范围内实现 4:1 阻抗带宽，有源 VSWR <3.0，扫描范围高达 ±45°。与参考阵列相比，单站散射显着减少，从 6.0 到 18。0 GHz，辐射性能保持良好。共形阵列的整体厚度仅为 0.31λ 左右_h在最高工作频率下。制造并测量了 2 × 8 共形阵列原型。实测结果与模拟结果吻合良好，证明了有效性。