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Scholarly Works (2 results)

  • Thesis
  • Peer Reviewed
UC Irvine Electronic Theses and Dissertations (2024)

FutureG wireless communication aims for data transmission rates of hundreds of gigabits per second (Gbps), utilizing the extensive bandwidth within the sub-terahertz (sub-THz) spectrum and higher-order modulation schemes such as 64QAM to enhance spectral efficiency. Conventional transmitter (TX) architectures face significant challenges at these data rates, especially from power amplifier (PA) design issues like efficiency degradation and AM-PM distortion.

This research introduces a bits-to-antenna RF-64QAM TX that constructs the 64QAM constellation directly in the RF domain using three QPSK sub-TXs with weighted amplitude, effectively countering PA nonlinearity challenges. To this end, a sub-THz TX prototype fabricated in 45nm CMOS SOI is presented, showcasing a 40-GHz RF bandwidth, with a measured data rate of 120 Gbps, and an effective isotropic radiated power (EIRP) of 16 dBm, paving the way for next-generation wireless communication.

    Creative Commons 'BY' version 4.0 license
    • Article
    • Peer Reviewed
    UC Irvine Previously Published Works (2024)
    This paper presents a single-chip bits-to-antenna transmitter (TX) for >100 Gbps in 45nm CMOS SOI. The construction of the 64QAM constellation is achieved directly in the RF domain by utilizing three QPSK sub-TXs with weighted amplitude. This method significantly reduces the need to address power amplifier nonlinear effects in high-order modulation, thereby creating room for TX enhancements in both bandwidth and output power. To further improve TX performance, multi-step phase alignment strategies, and a local oscillator leakage suppression technique have been incorporated. With 40-GHz RF bandwidth, the RF-64QAM TX prototype is able to achieve a measured data rate of 120 Gbps with 15dBm effective isotropic radiated power (EIRP).
      Cover page: A CMOS Fully Integrated 120-Gbps RF-64QAM F-band Transmitter with an On-Chip Antenna for 6G Wireless CommunicationCreative Commons 'BY' version 4.0 license
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