A 12.5-Gb/s Fresnel Zone Coupled Fully Rotatable 60-GHz Contactless Connector in 65-nm CMOS Process

Hossein Zaheri, Walter Wargacki, Caleb Romero, Yanghyo Kim

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

2 Scopus citations

Abstract

This work presents a 60-GHz contactless connector that can fully rotate without physical contact. Conventional connectors suffer poor mechanical reliability, maneuverability, and signal integrity when handling moving or rotating parts, such as in robotic arms, often becoming bottlenecks in high-precision autonomous systems. Our implemented system consists of a 60-GHz CMOS transmitter (Tx), receiver (Rx), and compact antenna to enable fully rotatable and energy-efficient contactless connector solutions. Two folded-dipole antennas communicate in a radiative Fresnel zone, where both longitudinal and transversal electromagnetic fields propagate simultaneously. We exploit the longitudinal electric field component to de-sensitize the polarization mismatch over the entire rotational angle. In addition, we employ an automatic gain control (AGC) loop and offset canceling amplifiers to compensate for the transmission characteristic degradation and signal imbalance when connectors rotate. The demonstrated system consumes 56 mW of power under a 1-V supply while transferring 12.5-Gb/s of data rate, achieving 4.5-pJ/bit energy efficiency.

Original languageEnglish
Title of host publication2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
Pages113-116
Number of pages4
ISBN (Electronic)9798350347647
DOIs
StatePublished - 2023
Event2023 IEEE/MTT-S International Microwave Symposium, IMS 2023 - San Diego, United States
Duration: 11 Jun 202316 Jun 2023

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2023-June
ISSN (Print)0149-645X

Conference

Conference2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
Country/TerritoryUnited States
CitySan Diego
Period11/06/2316/06/23

Keywords

  • CMOS
  • Contactless Connector
  • Millimeter-Wave
  • Non-Coherent Detection
  • OOK Modulation
  • Radiative Fresnel Zone
  • Rotational Connector

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