Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology

Jiachen  Shen; Yi Zhang; Yang Liu; Lin He; Yufeng Guo; Hao Gao

doi:10.1109/ISCAS51556.2021.9401243

Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology

Jiachen Shen, Yi Zhang, Yang Liu, Lin He, Yufeng Guo, Hao Gao

Integrated Circuits

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

Wideband beamforming is widely required in the sub-6GHz frequency band for 5G commutation and the next generation wireless communication (B5G). The true time delay is the most crucial component, especially in the sub-6GHz frequency band. This paper presents a new true time delay by using an N-path switch capacitor delay cell to break the tradeoff between bandwidth and delay range by introducing tunable sampling clocks. The non-idealities and limitations are discussed as well. In a 40-nm CMOS technology, the implemented true time delay achieves maximum 900ps delay at 3GHz and 500ps delay at 6GHz with 0.15% variation. Reliability of the design is verified by process variation simulation as well. The proposed topology provides a large delay range with a compact size, which is suitable for sub-6 GHz wideband applications.

Original language	English
Title of host publication	2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	4
ISBN (Electronic)	9781728192017
ISBN (Print)	978-1-7281-9201-7
DOIs	https://doi.org/10.1109/ISCAS51556.2021.9401243
Publication status	Published - 27 Apr 2021
Event	53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 - VIRTUAL, Daegu, Korea, Republic of Duration: 22 May 2021 → 28 May 2021

Conference

Conference	53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
Country/Territory	Korea, Republic of
City	Daegu
Period	22/05/21 → 28/05/21

Keywords

5G
Beamforming
CMOS
Sub-6 GHz band
True time delay
Wideband

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10.1109/ISCAS51556.2021.9401243

Cite this

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title = "Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology",

abstract = "Wideband beamforming is widely required in the sub-6GHz frequency band for 5G commutation and the next generation wireless communication (B5G). The true time delay is the most crucial component, especially in the sub-6GHz frequency band. This paper presents a new true time delay by using an N-path switch capacitor delay cell to break the tradeoff between bandwidth and delay range by introducing tunable sampling clocks. The non-idealities and limitations are discussed as well. In a 40-nm CMOS technology, the implemented true time delay achieves maximum 900ps delay at 3GHz and 500ps delay at 6GHz with 0.15% variation. Reliability of the design is verified by process variation simulation as well. The proposed topology provides a large delay range with a compact size, which is suitable for sub-6 GHz wideband applications. ",

keywords = "5G, Beamforming, CMOS, Sub-6 GHz band, True time delay, Wideband",

author = "Jiachen Shen and Yi Zhang and Yang Liu and Lin He and Yufeng Guo and Hao Gao",

year = "2021",

month = apr,

day = "27",

doi = "10.1109/ISCAS51556.2021.9401243",

language = "English",

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booktitle = "2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings",

publisher = "Institute of Electrical and Electronics Engineers",

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note = "53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 ; Conference date: 22-05-2021 Through 28-05-2021",

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Shen, J, Zhang, Y, Liu, Y, He, L, Guo, Y & Gao, H 2021, Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology. in 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings., 9401243, Institute of Electrical and Electronics Engineers, 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021, Daegu, Korea, Republic of, 22/05/21. https://doi.org/10.1109/ISCAS51556.2021.9401243

Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology. / Shen, Jiachen ; Zhang, Yi; Liu, Yang; He, Lin; Guo, Yufeng; Gao, Hao.

2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings. Institute of Electrical and Electronics Engineers, 2021. 9401243.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology

AU - Shen, Jiachen

AU - Zhang, Yi

AU - Liu, Yang

AU - He, Lin

AU - Guo, Yufeng

AU - Gao, Hao

PY - 2021/4/27

Y1 - 2021/4/27

N2 - Wideband beamforming is widely required in the sub-6GHz frequency band for 5G commutation and the next generation wireless communication (B5G). The true time delay is the most crucial component, especially in the sub-6GHz frequency band. This paper presents a new true time delay by using an N-path switch capacitor delay cell to break the tradeoff between bandwidth and delay range by introducing tunable sampling clocks. The non-idealities and limitations are discussed as well. In a 40-nm CMOS technology, the implemented true time delay achieves maximum 900ps delay at 3GHz and 500ps delay at 6GHz with 0.15% variation. Reliability of the design is verified by process variation simulation as well. The proposed topology provides a large delay range with a compact size, which is suitable for sub-6 GHz wideband applications.

AB - Wideband beamforming is widely required in the sub-6GHz frequency band for 5G commutation and the next generation wireless communication (B5G). The true time delay is the most crucial component, especially in the sub-6GHz frequency band. This paper presents a new true time delay by using an N-path switch capacitor delay cell to break the tradeoff between bandwidth and delay range by introducing tunable sampling clocks. The non-idealities and limitations are discussed as well. In a 40-nm CMOS technology, the implemented true time delay achieves maximum 900ps delay at 3GHz and 500ps delay at 6GHz with 0.15% variation. Reliability of the design is verified by process variation simulation as well. The proposed topology provides a large delay range with a compact size, which is suitable for sub-6 GHz wideband applications.

KW - 5G

KW - Beamforming

KW - CMOS

KW - Sub-6 GHz band

KW - True time delay

KW - Wideband

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U2 - 10.1109/ISCAS51556.2021.9401243

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M3 - Conference contribution

SN - 978-1-7281-9201-7

BT - 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings

PB - Institute of Electrical and Electronics Engineers

T2 - 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021

Y2 - 22 May 2021 through 28 May 2021

ER -

Wideband Digitally Controlled True Time Delay for Beamforming in a 40 nm CMOS Technology

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Keywords

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