This Special Issue is devoted to technical papers on radar and sensor systems in microwave and millimeter-wave bands. Massive technological progress has been made in recent years at the microwave device and component level, enabling new research directions on sophisticated microwave and millimeter-wave systems. Among the most significant fields of application for such systems has been sensor technology, with a major emphasis on radar systems. Interest in automotive sensing, wireless human-computer interaction, biometric measurements, industrial monitoring, and target tracking—among many other applications—has driven this interest. Advances in device and component technology are supporting system design concepts that treat the microwave hardware as a co-design element of the system, along with signal processing and antenna design. Such co-design is of particular importance in radar and sensor systems, where a rapidly increasing number of wireless devices and an increasingly crowded spectrum necessitates the design and use of specialized signals (both temporal waveform designs and spatial beamforming) to maintain and improve sensor performance. Systems designed for general broad applicability are becoming more challenging to implement, while specialized systems that co-design the aperture, microwave hardware, and signal processing are becoming increasingly relevant. Technologies such as digital array radar, distributed and networked sensors, computational imagers, high-sensitivity Doppler radars, and integrated millimeter-wave radar, to name only a few, have supported system-level developments.

中文翻译：

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关于雷达和微波传感器系统的客座编辑特刊

本期特刊专门介绍有关微波和毫米波段雷达和传感器系统的技术论文。近年来，在微波器件和组件层面取得了巨大的技术进步，为复杂的微波和毫米波系统提供了新的研究方向。此类系统最重要的应用领域之一是传感器技术，主要侧重于雷达系统。对汽车传感、无线人机交互、生物特征测量、工业监控和目标跟踪以及许多其他应用的兴趣推动了这种兴趣。设备和组件技术的进步正在支持将微波硬件视为系统协同设计元素的系统设计理念，以及信号处理和天线设计。这种协同设计在雷达和传感器系统中尤为重要，因为无线设备数量的迅速增加和日益拥挤的频谱需要设计和使用专门的信号（时间波形设计和空间波束成形）来维持和提高传感器性能. 为广泛适用而设计的系统的实施变得更具挑战性，而共同设计孔径、微波硬件和信号处理的专用系统变得越来越重要。数字阵列雷达、分布式和网络传感器、计算成像仪、高灵敏度多普勒雷达和集成毫米波雷达等技术已支持系统级开发。随着无线设备数量的迅速增加和日益拥挤的频谱，需要设计和使用专门的信号（时间波形设计和空间波束成形）来维持和提高传感器性能。为广泛适用而设计的系统的实施变得更具挑战性，而共同设计孔径、微波硬件和信号处理的专用系统变得越来越重要。数字阵列雷达、分布式和网络传感器、计算成像仪、高灵敏度多普勒雷达和集成毫米波雷达等技术已支持系统级开发。随着无线设备数量的迅速增加和日益拥挤的频谱，需要设计和使用专门的信号（时间波形设计和空间波束成形）来维持和提高传感器性能。为广泛适用而设计的系统的实施变得更具挑战性，而共同设计孔径、微波硬件和信号处理的专用系统变得越来越重要。数字阵列雷达、分布式和网络传感器、计算成像仪、高灵敏度多普勒雷达和集成毫米波雷达等技术已支持系统级开发。