摘要翻译：
微波相控阵天线以其快速波束扫描和复杂波束方向图控制的能力，在国防和高速无线通信领域有着广泛的应用前景。然而，传统的基于移相器的PAAs存在光束斜视问题，并且带宽有限。基于低损耗光子延迟线的真时延(TTD)波束形成可以解决这一问题。但是，由于光子TTD波束形成器的硬件复杂度较高，使得大规模的光子TTD波束形成器的制作仍然具有很大的挑战性。本文介绍了一种基于微谐振腔频率梳（microcomb）源和色散时延的光子TTD波束形成网络。提出了一种结合光学相位调制和可编程光谱整形的正负变迹加权方法，实现了任意微波波束方向图的控制。实验证明，TTD波束形成网络可以支持21个单元的PAA。微波频率范围为$\mathbf{8\sim20{GHz}}$,波束扫描范围为$\mathbf{\pm 60.2^\circ}$。详细测量了微波振幅和相位。在假设均匀辐射天线阵的基础上，通过仿真研究了高斯波束、矩形波束和波束陷波方向的波束形成性能。该方案通过增加宽带微梳产生的梳线数量，可以潜在地支持数百个元素的更大的PAAs。
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英文标题：
《Microcomb-based true-time-delay network for microwave beamforming with
  arbitrary beam pattern control》
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作者：
Xiaoxiao Xue, Yi Xuan, Chengying Bao, Shangyuan Li, Xiaoping Zheng,
  Bingkun Zhou, Minghao Qi, and Andrew M. Weiner
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最新提交年份：
2018
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分类信息：

一级分类：Physics        物理学
二级分类：Applied Physics        应用物理学
分类描述：Applications of physics to new technology, including electronic devices, optics, photonics, microwaves, spintronics, advanced materials, metamaterials, nanotechnology, and energy sciences.
物理学在新技术中的应用，包括电子器件、光学、光子学、微波、自旋电子学、先进材料、超材料、纳米技术和能源科学。
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一级分类：Electrical Engineering and Systems Science        电气工程与系统科学
二级分类：Signal Processing        信号处理
分类描述：Theory, algorithms, performance analysis and applications of signal and data analysis, including physical modeling, processing, detection and parameter estimation, learning, mining, retrieval, and information extraction. The term "signal" includes speech, audio, sonar, radar, geophysical, physiological, (bio-) medical, image, video, and multimodal natural and man-made signals, including communication signals and data. Topics of interest include: statistical signal processing, spectral estimation and system identification; filter design, adaptive filtering / stochastic learning; (compressive) sampling, sensing, and transform-domain methods including fast algorithms; signal processing for machine learning and machine learning for signal processing applications; in-network and graph signal processing; convex and nonconvex optimization methods for signal processing applications; radar, sonar, and sensor array beamforming and direction finding; communications signal processing; low power, multi-core and system-on-chip signal processing; sensing, communication, analysis and optimization for cyber-physical systems such as power grids and the Internet of Things.
信号和数据分析的理论、算法、性能分析和应用，包括物理建模、处理、检测和参数估计、学习、挖掘、检索和信息提取。“信号”一词包括语音、音频、声纳、雷达、地球物理、生理、（生物）医学、图像、视频和多模态自然和人为信号，包括通信信号和数据。感兴趣的主题包括：统计信号处理、谱估计和系统辨识；滤波器设计；自适应滤波/随机学习；（压缩）采样、传感和变换域方法，包括快速算法；用于机器学习的信号处理和用于信号处理应用的机器学习；网络与图形信号处理；信号处理中的凸和非凸优化方法；雷达、声纳和传感器阵列波束形成和测向；通信信号处理；低功耗、多核、片上系统信号处理；信息物理系统的传感、通信、分析和优化，如电网和物联网。
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英文摘要：
  Microwave phased array antennas (PAAs) are very attractive to defense applications and high-speed wireless communications for their abilities of fast beam scanning and complex beam pattern control. However, traditional PAAs based on phase shifters suffer from the beam-squint problem and have limited bandwidths. True-time-delay (TTD) beamforming based on low-loss photonic delay lines can solve this problem. But it is still quite challenging to build large-scale photonic TTD beamformers due to their high hardware complexity. In this paper, we demonstrate a photonic TTD beamforming network based on a miniature microresonator frequency comb (microcomb) source and dispersive time delay. A method incorporating optical phase modulation and programmable spectral shaping is proposed for positive and negative apodization weighting to achieve arbitrary microwave beam pattern control. The experimentally demonstrated TTD beamforming network can support a PAA with 21 elements. The microwave frequency range is $\mathbf{8\sim20\ {GHz}}$, and the beam scanning range is $\mathbf{\pm 60.2^\circ}$. Detailed measurements of the microwave amplitudes and phases are performed. The beamforming performances of Gaussian, rectangular beams and beam notch steering are evaluated through simulations by assuming a uniform radiating antenna array. The scheme can potentially support larger PAAs with hundreds of elements by increasing the number of comb lines with broadband microcomb generation.
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PDF链接：
https://arxiv.org/pdf/1710.00045