论文标题
平面跨表面天线，可通过边界进行调谐计算成像
Planar Metasurface Antenna with Tunable via Boundaries for Computational Imaging
论文作者
论文摘要
元表面天线和计算成像的融合促进了不需要透镜，相位变速器或运动部件的微波成像系统的设计。该技术涉及生成适当设计的各种测量模式，以将场景信息编码为少量测量。我们提出了一种用于计算微波成像的新型边界可调的平行板板层天线。提出的天线利用了两层VIA的可切换边界，以有效地更改天线腔支持的波导模式，从而导致场景平面中的不同测量模式。使用奇异值分解确认边界调谐方法优于同一天线的频率多样性方法。合成成像是使用偶联偶极模型进行的，该模型在定量上证明了所提出的天线的功效以及对噪声降低至15 dB SNR的鲁棒性。
The fusion of metasurface antennas and computational imaging facilitates the design of microwave imaging systems which require no lenses, phase shifters or moving parts. The technique involves the generation of appropriately designed diverse measurement modes to encode the scene information into a small number of measurements. We propose a novel boundary-tunable parallel plate waveguide-based metasurface antenna for computational microwave imaging. The proposed antenna leverages a switchable boundary of two layers of vias, to efficiently change the waveguide modes supported by the antenna cavity, leading to diverse measurement modes in the scene plane. The superiority of the boundary tuning approach over the frequency diversity approach for the same antenna is confirmed using the singular value decomposition. Synthetic imaging is performed using a coupled dipole model, which quantitatively proves the efficacy of the proposed antenna along with the robustness against noise down to 15 dB SNR.
