← 返回 JSSC 论文列表JSSC 2014第8期RF & Wireless0.25μm SiGe BiCMOSPhased Array
Design of Lumped-Component Programmable Delay Elements for Ultra-Wideband Beamforming
提出一种基于梯形滤波器的可编程时延元件，用于超宽带波束成形系统。
3.1–10.6 GHz, 140 ps延迟范围, 30 dB至10 dB增益范围, 53 mW功耗, 2.5 V供电
超宽带波束成形梯形滤波器可编程时延低功耗
▸创新点1：梯形滤波器设计（方法创新） - 采用基于梯形滤波器的可编程时间延迟元件，替代传统的抽头延迟线架构，显著提高了延迟范围和分辨率，同时降低了功耗和面积占用。
▸创新点2：多项式近似方法（方法创新） - 通过泰勒和帕德展开将延迟近似为多项式比例，实现了集总元件实现的可行性，为超宽带系统提供了更灵活的设计空间。
▸创新点3：低功耗高分辨率（电路创新） - 在0.25μm SiGe BiCMOS工艺下，延迟元件仅消耗53mW功耗，同时实现了140ps的延迟范围和0.86°的波束成形分辨率，性能优于传统方案。
▸创新点4：面积效率优化（系统创新） - 延迟元件仅占用1mm²的主动面积，结合四天线波束成形系统，实现了61°的扫描范围，展示了高集成度和系统级优势。
Abstract
We introduce a ladder filter-based programmable time-delay element for beamforming in ultra-wideba nd (UWB) systems. Such a lumped-element realization becomes possible by approximating as a ratio of polynomials (based on Taylor and Padé expansions). When compared w ith conventional methods based on the tapped delay- line architecture, the proposed technique achieves lower power d issipation, higher delay range and resolution, and better area ef ficiency. A prototype delay line designed for the 3.1–10.6 GHz UWB range achieves a delay range of 140 ps and a gain range of 30 dB to 10 dB. Fabricated in a0 . 2 5 m SiGe BiCMOS process, the delay e lement occupies an active area of 1 mm and consumes 53 mW from a 2.5 V supply. A four-antenna beamforming system using the delay element can achieve a scanning range of 61 with 0.86 resolution for an antenna spacing of 15 mm.