A disordered-cavity-based metaimager (DCM) that can be used for coincidence imaging is proposed in this letter. The proposed DCM possesses narrow frequency gap, low correlation coefficients, and high efficiency. Due to the all-in-one design, the DCM has good robustness and is insensitive to fabrication errors, which is suitable to be fabricated using the 3-D printing technique. The DCM working from 32 to 36 GHz contains a disordered cavity, sets of high-efficiency coupling slots and a frequency-diverse metasurface. Measurement modes generated by the DCM are low correlated due to frequency-diverse field distributions of the disordered cavity and distinguished transmission features of metamaterial elements composing the metasurface. Performances of the DCM including the reflection coefficients, the efficiency, and the correlation coefficients are evaluated. Finally, a coincidence imaging experiment is also carried out using the proposed DCM and the image of the target is reconstructed under different signal-to-noise ratio (SNR) conditions. The design is validated by both the simulated and measured results.

中文翻译：

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用于符合成像的 3D 打印无序腔元成像仪

这封信中提出了一种可用于重合成像的基于无序腔的元成像器 (DCM)。所提出的 DCM 具有窄频隙、低相关系数和高效率。由于一体式设计，DCM 具有良好的鲁棒性并且对制造错误不敏感，适合使用 3-D 打印技术制造。工作频率为 32 至 36 GHz 的 DCM 包含一个无序腔、多组高效耦合槽和一个分频超表面。由于无序腔的频分场分布和构成超表面的超材料元件的显着传输特征，DCM 产生的测量模式相关性较低。DCM 的性能包括反射系数、效率、并评估相关系数。最后，还使用所提出的 DCM 进行了重合成像实验，并在不同的信噪比 (SNR) 条件下重建了目标图像。该设计通过模拟和测量结果进行验证。