A Six-Phase Two-Stage Blocker-Tolerant Harmonic-Rejection Receiver

Faizan Ul Haq*, Mikko Englund, Yury Antonov, Miikka Tenhunen, Kari Stadius, Marko Kosunen, Kim B. Ostman, Kimmo Koli, Jussi Ryynänen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
152 Downloads (Pure)

Abstract

Modern wideband receivers need to operate linearly in the presence of strong out-of-band blockers. In this article, we introduce a blocker-tolerant harmonic rejection (HR) receiver, which can suppress blockers at the local oscillator harmonics. The suppression is achieved by applying the HR in two stages, such that the first HR already occurs at the first gain-stage output. The proposed receiver achieves this HR with a simple six-phase local-oscillator (LO) clocking. The proposed design also uses simple gain coefficients of ±1 while implementing HR in two stages that compensates for the mismatch effects of each stage. In addition, the near-band blocker linearity is improved by implementing a third-order baseband feedback response, which acts in conjunction with the N -path filtering. Implemented in a 28-nm Fully-Depleted Silicon-on-Insulator (FDSOI) process, the receiver demonstrates the 18-37-dB HR from the first stage and 46-53 dB of HR in total. Furthermore, a blocker compression point (BCP) of 2.5 dBm for a third harmonic blocker and a near-band BCP of -6.5 dBm are achieved.

Original languageEnglish
Article number8994180
Pages (from-to)1964-1976
Number of pages13
JournalIEEE Transactions on Microwave Theory and Techniques
Volume68
Issue number5
DOIs
Publication statusPublished - May 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Blocker resilience
  • Direct downconversion receivers
  • Harmonic rejection (HR)
  • N-path filtering

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