⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种基于gm-RC全通时延单元的相控阵接收机芯片，工作频率1-2.5GHz，实现了紧凑的真延时（而非相位偏移）以避免宽带波束斜视。解决了传统相控阵在宽扫描角和瞬时带宽下因近似相位延时导致的波束畸变问题，适用于合成孔径雷达等应用。
shifters. Although a constant phase shift can approximate a time delay in a limited frequency band, this does not hold for larger arrays that scan over wide angles and have a large instantaneous bandwidth. In this case true time delays are wanted to avoid effects such as beam-squinting. In this paper we aim at compactly integrating a delay based phased-array receiver in standard CMOS IC technology. This is for instance relevant for synthetic aperture radars, which require large instantaneous bandwidths often in excess of 1GHz, either as RF or as IF bandwidth in a superheterodyne system. We target low-GHz radar frequencies, assuming sub-arrays of four elements and up to 550ps delay. Integrated time-delay cells have been proposed based on the approximation of transmission-line segments with integrated LC lumped elements [1]. These,
Seyed Kasra Garakoui, Eric A.M. Klumperink, Bram Nauta, Frank F.E Van Vliet
University of Twente, Enschede, The Netherlands Electronically variable delays for beamforming are generally realized by phase