论文名称“A 94-GHz Dual-Polarized 1-D Series-Fed Phased Array Antenna With Low Sidelobe Level Based on Multilayer Coreless ABF Substrates”， W波段微型合成孔径雷达（SAR）通过其短波长优势，并且可以在较小的体积下实现窄波束和紧凑结构下的双极化，大幅提升了无人机在多种复杂环境中的成像性能。尽管如此，为了达到更小的波束宽度，需要使用更大的天线，这不可避免地减少了其条带覆盖范围。相控阵雷达技术的波束扫描功能在W波段的应用中遭遇了成本和尺寸的挑战，尤其是在实现双极化二维扫描方面。本研究提出了一种创新的W波段相控阵天线设计，该设计采用无芯ABF基板和精密图案电镀技术，构建了一个紧凑的梳状馈电网络和一个高效率的功率分配器，以实现低副瓣电平。该天线由48个单元组成的矩形网格阵列构成，不仅具备双极化功能，还能进行广角一维波束扫描，同时保持低副瓣电平的辐射方向图，有效克服了现有技术中的诸多限制，为SAR系统提供了更高的性能和更广泛的应用潜力。工作主要完成人：王鼎，程钰间，樊勇。

论文链接： https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10599494

Abstract—This article introduces a 94-GHz dual-polarized 1-D beamforming patch antenna array, specifically designed to achieve low sidelobe levels (SLLs) and an extensive scanning range. The array, in a 4 ´ 8 configuration, is capable of 1-D expansion and utilizes Ajinomoto build-up film (ABF) substrates alongside a precision electroplating process. This combination ensures high accuracy and fulfills the miniaturization demands for 94-GHz operations. A notable achievement of this research is the design of a compact power divider using a coupling line with short end, which establishes a large power dividing ratio. This design is pivotal in maintaining consistently low SLLs, typically below -18.2 dB and often below -20 dB, over the 92~96-GHz bandwidth within a 1 ´ 8 linear array. In addition, the array's transverse profile is optimized by altering the feeder angle, decreasing the distance between linear arrays to 0.52 λ₀, where λ₀ denotes the free-space wavelength at 94 GHz. The proposed 4 ´ 8 array design facilitates beam steering up to ±45° without grating lobes. The construction and experiments of the dual-polarized array antenna at 94 GHz validate its effectiveness, confirming the achievement of low SLL and extensive scanning capabilities in both polarizations.

Index Terms—1-D beamforming, Ajinomoto build-up film (ABF) substrate, antenna arrays, coreless substrate, dual polarized, low sidelobe level (SLL), radar antennas, W-band.