Active Tunable Millimeter-wave Reflective Surface across 57-64 GHz for Blockage Mitigation and Physical Layer Security

Suresh Venkatesh, Hooman Saeidi, Xuyang Lu, Kaushik Sengupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Millimeter-wave wireless networks allow for spatial multiplexing and high throughput. However, they are critically susceptible to blockages, channel propagation variations, and fading. To incorporate resilience in such networks, a class of reconfigurable surfaces realized with reflect-arrays have shown theoretical promise in reconfiguring the channel on demand, creating programmable non-line-of-sight (NLOS) paths, and providing a scalable solution compared to densification of base stations and access points. In this paper, we present a scalable approach towards realizing active surfaces with the ability to simultaneously receive, amplify, beamform, and re-transmit to the intended receiver (Rx) in a secure fashion. We demonstrate with the proof-of-concept 2D and 1D arrays realized with custom silicon ICs in a 65-nm CMOS process while the reception and re-transmission is achieved through off-chip packaged dual-feed probe-fed patch antenna. Each chip incorporates two independent transceiver (TxRx) chains, with two-stage LNA and a 5-bit controlled 360° IQ phase shifter, collectively providing controllable gain of up to 15.2dB, Psat of 4.2dBm at 60GHz, noise figure ≈ 5-6dB, and supporting up to 20Gbps with 32-QAM constellation. With packaged 1D and 2D arrays, we demonstrate ±45° beamforming capability for various Tx positions closing links where simple reflective surfaces tend to fail. In addition, with spatio-temporal control over the surface, we also demonstrate physical layer security.

Original languageEnglish (US)
Title of host publication2022 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages63-66
Number of pages4
ISBN (Electronic)9781665496117
DOIs
StatePublished - 2022
Event2022 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2022 - Denver, United States
Duration: Jun 19 2022Jun 21 2022

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
Volume2022-June
ISSN (Print)1529-2517

Conference

Conference2022 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2022
Country/TerritoryUnited States
CityDenver
Period6/19/226/21/22

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Keywords

  • 5G
  • active reflector array
  • antenna array
  • beamforming
  • integrated transceivers
  • millimeter-wave
  • physical-layer security

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