A fully integrated 27.5-30.5 ghz 8-element phased-array transmit front-end module in 65 nra cmos

An'an Li, Yingtao Ding, Zipeng Chen, Wei Wang, Sijia Jiang, Shiyan Sun, Zhiming Chen, Baoyong Chi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Citations (Scopus)

Abstract

A fully integrated 27.5-30.5 GHz 8-element pliased- array transmit front-end module iu 65 nm CMOS is presented. The module is based 011 the all-RF phased-array architecture and consists of 8 phased-array elements. One 1:8 power splitter divides the input power into 8 elements after the driver stages. Each element consists of one 5-bit digital attenuator, one 5-bit phase shifter, one extra 0/180° switching amplifier, one power amplifier and some buffer stages between the above stages to compensate the gain loss. A 5-bit digital attenuator with amplitude and phase calibration is presented to provide 15.5 dB attenuation coverage with 0.5 dB step. A 180° reflection-type phase shifter, along with an 0/180° switching amplifier is proposed to realize 360° phase shifting coverage with 5.625° step. Amplifiers, including power amplifier, 0/180° switching amplifier and buffer stages, adopt wideband inter-stage matching technique to ensure 27.5-30.5 GHz bandwidth coverage. All of the features are digitally controllable. The measurements show that the module achieves <-10 dB input return loss, about 36 dB gain across 27.5-30.5 GHz and delivers about 12.71 dBm output- referred 1-dB compression point (OPldB) power at 29 GHz. The module achieves 2.61° RMS (root mean square) phase error with 1.26 dB RMS gain variation across 27.5-30.5 GHz from the phase shifter and 0/180° switching amplifier. The attenuator achieves 0.26 dB RMS amplitude error with 2.79° RMS phase variation. The chip occupies 6.95 x 3.17 mm2 area and consumes 1.66 A from the 1.2 V power supplies.

Original languageEnglish
Title of host publicationProceedings - 2019 IEEE Asian Solid-State Circuits Conference, A-SSCC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages153-156
Number of pages4
ISBN (Electronic)9781728151069
DOIs
Publication statusPublished - Nov 2019
Event15th IEEE Asian Solid-State Circuits Conference, A-SSCC 2019 - Macao, China
Duration: 4 Nov 20196 Nov 2019

Publication series

NameProceedings - 2019 IEEE Asian Solid-State Circuits Conference, A-SSCC 2019
Volume2019-November

Conference

Conference15th IEEE Asian Solid-State Circuits Conference, A-SSCC 2019
Country/TerritoryChina
CityMacao
Period4/11/196/11/19

Keywords

  • Attenuator
  • Cmos
  • Phase shifter
  • Phased-array
  • Power amplifier
  • Transmit front-end module

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