论文名称为“A metamaterial-based S/X dual-band shared-aperture phased-array antenna with wide beam coverage”。针对跳频抗干扰雷达军事应用，提出了一种超低剖面、波束可二维大角度扫描的 S/X 波段双频同线极化中等频比共口径相控阵天线。在阵列拓扑设计方面，S 波段天线单元采用了三角布阵、X 波段天线单元采用了方形栅格布阵。该布阵方式可实现双频天线单元布阵间距接近半个波长，从而满足双频天线波束可二维大角度扫描。在辐射器设计方面，为了实现超低剖面性能，X 波段贴片天线复用为 S波段蘑菇状人工电磁辐射结构，通过馈电结构融合设计使得天线整体剖面小于0.04 倍S波段中心频率波长。基于多层印制电路板工艺加工了天线样品，实测结果表明，该天线在扫描增益掉落 5dB 的范围内，S/X 波段均可以实现±50°的波束扫描范围。工作主要完成人柏春旭、程钰间、丁嫣然、张锦帆。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8979302

Abstract— This article proposes an ultralow profile S/X-band shared-aperture phased-array antenna (SAPAA), which can achieve wide beam scanning coverage in both the S- and X-bands. The SAPAA consists of an S-band array with a triangular placement that has 11 elements and a grid array with 8 × 16 X-band elements. To avoid grating lobes in wide beam scanning coverage, a metamaterial-based stacked mushroom structure is proposed to reduce the array spacing of the two bands, where an X-band patch antenna is stacked on a traditional mushroom structure. A 4 × 4 subarray of the stacked mushroom structure operates as a single antenna element in S-band. Consequently, each S-band element corresponds to a 4 × 4 subarray of the X-band element. Because a triangular arrangement in the S-band array and a square arrangement in the X-band array are employed, the array spacing of the two bands is 0.54λL0 and 0.51λH0, respectively, which is suitable for wide beam scanning coverage. Moreover, the shorting pin of the mushroom structure is also the feeding pin of the X-band patch. This structure reuse technology reduces the whole profile to less than 0.04λ0. To verify this design, a prototype is fabricated through the multilayer printed circuit board process. It realizes ±50◦ beam coverage in both the S and X bands.

Index Terms— Low profile, metamaterial, phased-array antenna (PAA), S/X-band, shared-aperture antenna, wide beam scanning coverage.