A 15-40 GHz CMOS true-time delay circuit for UWB multi-antenna systems

Sanggu Park, Sanggeun Jeon

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A CMOS true-time delay (TTD) circuit operating from 15 to 40 GHz is presented for integrated UWB multi-antenna systems. The TTD circuit employs a distributed active switching structure in which eight cascode switches are distributed along transmission lines, leading to 3-bit variations of the group delay. The size of the switches and the characteristic impedance of the transmission lines are carefully scaled so as to minimize loss variation among the different delay states, while maintaining flat delay performance over a wide bandwidth. The circuit is implemented in a bulk 0.13-μm CMOS technology and exhibits a total variable group delay of 40 ps with an average resolution of 5 ps from 15 to 40 GHz. The insertion loss was 14 dB with a maximum RMS variation of 1.6 dB, while the input and output return loss was better than 10 dB over the operating bandwidth.

Original languageEnglish
Article number6461436
Pages (from-to)149-151
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume23
Issue number3
DOIs
Publication statusPublished - 2013 Feb 15

Fingerprint

delay circuits
Delay circuits
Group delay
Ultra-wideband (UWB)
Electric lines
CMOS
time lag
antennas
Switches
Antennas
Bandwidth
Insertion losses
transmission lines
switches
bandwidth
Networks (circuits)
insertion loss
impedance
output

Keywords

  • CMOS
  • multi-antenna systems
  • scaled active switches
  • true-time delay (TTD)
  • ultra-wideband (UWB)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

A 15-40 GHz CMOS true-time delay circuit for UWB multi-antenna systems. / Park, Sanggu; Jeon, Sanggeun.

In: IEEE Microwave and Wireless Components Letters, Vol. 23, No. 3, 6461436, 15.02.2013, p. 149-151.

Research output: Contribution to journalArticle

@article{b65f313881ee447da26bbe0eee270138,
title = "A 15-40 GHz CMOS true-time delay circuit for UWB multi-antenna systems",
abstract = "A CMOS true-time delay (TTD) circuit operating from 15 to 40 GHz is presented for integrated UWB multi-antenna systems. The TTD circuit employs a distributed active switching structure in which eight cascode switches are distributed along transmission lines, leading to 3-bit variations of the group delay. The size of the switches and the characteristic impedance of the transmission lines are carefully scaled so as to minimize loss variation among the different delay states, while maintaining flat delay performance over a wide bandwidth. The circuit is implemented in a bulk 0.13-μm CMOS technology and exhibits a total variable group delay of 40 ps with an average resolution of 5 ps from 15 to 40 GHz. The insertion loss was 14 dB with a maximum RMS variation of 1.6 dB, while the input and output return loss was better than 10 dB over the operating bandwidth.",
keywords = "CMOS, multi-antenna systems, scaled active switches, true-time delay (TTD), ultra-wideband (UWB)",
author = "Sanggu Park and Sanggeun Jeon",
year = "2013",
month = "2",
day = "15",
doi = "10.1109/LMWC.2013.2244872",
language = "English",
volume = "23",
pages = "149--151",
journal = "IEEE Microwave and Wireless Components Letters",
issn = "1531-1309",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - A 15-40 GHz CMOS true-time delay circuit for UWB multi-antenna systems

AU - Park, Sanggu

AU - Jeon, Sanggeun

PY - 2013/2/15

Y1 - 2013/2/15

N2 - A CMOS true-time delay (TTD) circuit operating from 15 to 40 GHz is presented for integrated UWB multi-antenna systems. The TTD circuit employs a distributed active switching structure in which eight cascode switches are distributed along transmission lines, leading to 3-bit variations of the group delay. The size of the switches and the characteristic impedance of the transmission lines are carefully scaled so as to minimize loss variation among the different delay states, while maintaining flat delay performance over a wide bandwidth. The circuit is implemented in a bulk 0.13-μm CMOS technology and exhibits a total variable group delay of 40 ps with an average resolution of 5 ps from 15 to 40 GHz. The insertion loss was 14 dB with a maximum RMS variation of 1.6 dB, while the input and output return loss was better than 10 dB over the operating bandwidth.

AB - A CMOS true-time delay (TTD) circuit operating from 15 to 40 GHz is presented for integrated UWB multi-antenna systems. The TTD circuit employs a distributed active switching structure in which eight cascode switches are distributed along transmission lines, leading to 3-bit variations of the group delay. The size of the switches and the characteristic impedance of the transmission lines are carefully scaled so as to minimize loss variation among the different delay states, while maintaining flat delay performance over a wide bandwidth. The circuit is implemented in a bulk 0.13-μm CMOS technology and exhibits a total variable group delay of 40 ps with an average resolution of 5 ps from 15 to 40 GHz. The insertion loss was 14 dB with a maximum RMS variation of 1.6 dB, while the input and output return loss was better than 10 dB over the operating bandwidth.

KW - CMOS

KW - multi-antenna systems

KW - scaled active switches

KW - true-time delay (TTD)

KW - ultra-wideband (UWB)

UR - http://www.scopus.com/inward/record.url?scp=84874968538&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874968538&partnerID=8YFLogxK

U2 - 10.1109/LMWC.2013.2244872

DO - 10.1109/LMWC.2013.2244872

M3 - Article

AN - SCOPUS:84874968538

VL - 23

SP - 149

EP - 151

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

SN - 1531-1309

IS - 3

M1 - 6461436

ER -