北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (6): 1266-1272.doi: 10.13700/j.bh.1001-5965.2018.0626

• 论文 • 上一篇    

一种新型路径共享真时延波束合成架构的设计

党艳杰, 梁煜, 张为   

  1. 天津大学 微电子学院, 天津 300072
  • 收稿日期:2018-10-31 出版日期:2019-06-20 发布日期:2019-06-18
  • 通讯作者: 张为 E-mail:tjuzhangwei@tju.edu.cn
  • 作者简介:党艳杰 女,硕士研究生。主要研究方向:射频集成电路设计;梁煜 男,博士,副教授,硕士生导师。主要研究方向:射频集成电路设计、数字信号处理;张为 男,博士,教授,博士生导师。主要研究方向:射频集成电路设计、数字信号处理与图像分析与模式识别。
  • 基金资助:
    国家重点研发计划(2016YFE0100400)

Design of a new path-sharing true-time-delay beamformer architecture

DANG Yanjie, LIANG Yu, ZHANG Wei   

  1. School of Microelectronics, Tianjin University, Tianjin 300072, China
  • Received:2018-10-31 Online:2019-06-20 Published:2019-06-18

摘要: 为满足宽带天线通信系统多输入多输出的要求,提出了一种新型路径共享真时延波束合成架构。通过真时延单元提供的一定延时差弥补信号到达天线的时间差,合成多路信号来提高输出能力。相比于传统的波束合成架构,该架构通过真时延单元共享,节省芯片面积。该架构具有中心对称性与可扩展性,可支持2M个输入和2K个输出。基于HHNEC 0.18 μm CMOS工艺设计四入四出波束合成器单元,对提出的架构加以验证。仿真结果表明,工作频带为0.5~1.5 GHz,延时分辨率为80 ps、最大延时为720 ps。在天线间距为10.5 cm的情况下,能够提供±43°和±13°四个扫描角度。输入输出回波损耗≤-10 dB,带内整体增益为约26 dB,增益平坦度≤3 dB。版图面积(包括I/O焊盘和ESD)为3.69 mm×3.62 mm。

关键词: 多波束, 路径共享, 真时延, 群延时, 超宽带

Abstract: In order to meet the requirement of multi-input and multi-output of broadband wireless communication system, a new path-sharing true-time-delay beamformer architecture is proposed in this paper. The output capability is improved by synthesizing multiple signals, compensating the time difference in reaching the antenna with a certain delay difference provided by the true-time-delay unit. Compared with the traditional beamformer architecture, this architecture can save the area of chip by true-time-delay unit sharing. It is not only extensional, supporting 2 M antennas and synthesizing 2 K signal beams, but also symmetrical. Based on HHNEC 0.18 μm CMOS process, four-in-four-out beamformer is designed to verify the proposed architecture. The simulation results show that this beamformer works over 0.5-1.5 GHz and has four antennas, with delay resolution of 80 ps and maximum delay of 720 ps. It can provide four scanning angles of ±43° and ±13° for four antennas with 10.5 cm spacing. The input-output return loss is not more than -10 dB, the gain is about 26 dB, and gain flatness is not more than 3 dB. The layout area (including I/O pad and ESD) is 3.69 mm×3.62 mm.

Key words: multi-beam, path-sharing, true-time-delay, group delay, ultra wide band

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