一种基于有源真时延的低复杂度波束形成器设计

doi:10.13232/j.cnki.jnju.2019.05.006

南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (5): 750–757.doi: 10.13232/j.cnki.jnju.2019.05.006

一种基于有源真时延的低复杂度波束形成器设计

李泰安,张为(),林建烽,郝东宁

天津大学微电子学院，天津，300072

收稿日期:2019-05-18 出版日期:2019-09-30 发布日期:2019-11-01
通讯作者: 张为 E-mail:tjuzhangwei@tju.edu.cn
基金资助:
国家重点研发计划(2016YFE0100400)

Design of a low⁃complexity beamformer based on active true⁃time delay

Taian Li,Wei Zhang(),Jianfeng Lin,Dongning Hao

School of Microelectronics，Tianjin University，Tianjin，300072，China

Received:2019-05-18 Online:2019-09-30 Published:2019-11-01
Contact: Wei Zhang E-mail:tjuzhangwei@tju.edu.cn

摘要/Abstract

摘要：

基于0.18 μm BiCMOS工艺，实现一种基于有源真时延技术的低复杂度波束形成架构设计.该波束形成架构适用于多路输出的宽带多天线系统，能够将输入到阵列中的信号进行空间滤波处理，抑制噪声和干扰，增强有用信号.相比于传统的波束形成架构，该架构通过真时延单元共享，实现了低复杂度（更少的延时单元数量），并采用改进的有源真时延单元，在保证稳定延时的同时，有效降低了芯片面积，相比同样功能的无源结构实现方案，面积节省了近80%.仿真结果表明，在0.3 G~1 GHz频带内，波束形成芯片能够同时实现对空间中四个不同方向的信号合成，最小延时分辨率是103 ps，最大延时是1030 ps，延时波动小于2.4%，电源电压为1.8 V，输入、输出端口回波损耗小于-13.8 dB，带内合成增益为25 dB，版图面积为3.8 mm².

关键词: 低复杂度, 有源真时延单元, 波束形成, 群延时, 超宽带

Abstract:

Based on 0.18 μm BiCMOS technology，a low?complexity beamformer architecture using active true time delay(TTD) was designed. The beamformer architecture is suitable for broadband multi?antenna system with multiple outputs，which can spatially filter the input signals into the array，suppress noise and interference，and enhance useful signals. Compared with the traditional beamformer architecture，this architecture achieves low complexity (less number of delay units) by sharing true?time delay units，and uses improved active true?time delay units to ensure stable delay while effectively reducing chip area. Compared with the passive structure implementation scheme with the same function，the area is saved by nearly 80%. The simulation results show that in the range of 0.3 G to 1 GHz，the beamformer can simultaneously synthesize signals in four different directions in space. The minimum delay resolution is 103 ps，the maximum delay is 1030 ps，and the delay variation is less than 2.4%. Under 1.8 V supply voltage，the return loss of the input and output ports is less than -13.8 dB，the in?band synthesis gain is 25 dB，and the chip area is 3.8 mm².

Key words: low?complexity, active true?time delay unit, beamformer, group delay, ultra wide band

中图分类号:

TN432

李泰安,张为,林建烽,郝东宁. 一种基于有源真时延的低复杂度波束形成器设计[J]. 南京大学学报(自然科学版), 2019, 55(5): 750–757.

Taian Li,Wei Zhang,Jianfeng Lin,Dongning Hao. Design of a low⁃complexity beamformer based on active true⁃time delay[J]. Journal of Nanjing University(Natural Sciences), 2019, 55(5): 750–757.

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参数	文献[11]	文献[12]	文献[13]	文献[16]	本文
工艺	0.18 μm	0.13 μm	0.14 μm	0.13 μm	0.18 μm
带宽(GHz)	0.35~1	1~15	1~2.5	0.96~5.1	0.3~1
延时通道	4	4	4	4	4
输出端口个数	4	1	1	1	4
延时范围(ps)	0~720	0~225	0~550	0~82	0~1030
延时波动	N.A.	*14%	2%	N.A.	2.4%
增益(dB)	18.5	24	~12	~21	25
功耗(mW)	234	555	450	**30.6~52.5	396
面积(mm²)	19.995	9.92	1	N.A.	3.8
真时延技术	LC	LC	Gm?C	Gm?C	Gm?C

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一种基于有源真时延的低复杂度波束形成器设计

Design of a low⁃complexity beamformer based on active true⁃time delay

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