An 800-ps Origami True-Time-Delay-Based CMOS Receiver Front End for 6.5-9 GHz Phased Arrays

Min Li, Nayu Li, Huiyan Gao, Zijiang Zhang, Shaogang Wang, Yen Cheng Kuan, Chunyi Song, Xiaopeng Yu, Qun Jane Gu, Zhiwei Xu

Research output: Contribution to journalArticlepeer-review

Abstract

A true-time-delay-based (TTD-based) receiver front end with 800-ps time delay for 6.5-9 GHz wideband phased arrays has been designed for satellite communication in a 65 nm CMOS technology. The proposed receiver front end consists of a balanced low noise amplifier (LNA), a 6-bit attenuator with 15.75-dB tuning range, a programmable TTD element featuring 800-ps delay with 25-ps delay step, and an output buffer amplifier. Differential origami inductor is proposed to boost delay unit’s quality factor and mitigate the insertion loss introduced by the artificial transmission line (ATL). A current-mode radio frequency (RF) multiplexer is designed to ensure a rapid delay switching. The receiver front end demonstrates a 3.6-dB noise figure (NF) with an 18-dB typical gain and an input 1-dB compression point (IP1dB) of -17 dBm at 6.5-9 GHz. This TTD element allows for a low insertion loss and a small chip area per unit time delay of ATL-based RF TTDs.

Original languageEnglish
JournalIEEE Solid-State Circuits Letters
DOIs
StateAccepted/In press - 2020

Keywords

  • Beamforming
  • Delay lines
  • Delays
  • Inductors
  • Multiplexing
  • origami inductor
  • phased array receiver
  • Radio frequency
  • receiver front end
  • Receivers
  • Switches
  • true time delay
  • wideband receiver.

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