Volume: 73, Issue: 4, April 2025
Hao GuoA 460-GHz Receiver Using Second-Order Subharmonic Mixer in 65-nm CMOS
Abstract
DOI: 10.1109/TMTT.2024.3471676
IEEEXplore: https://ieeexplore.ieee.org/document/10716250
Device
A 460-GHz receiver using a second-order subharmonic mixer in 65-nm CMOS
Spectrum
460 GHz
Novelty
Adverse effects of the spurious mixing product and LO harmonic on the mixer performance are avoided with careful consideration for impedances provided to the subharmonic mixer (SHM) at fRF − fLO and 2fLO .
Integrating a differential on-chip patch antenna in the receiver avoids the interface complexities of a lossy balun.
Application
Multichannel THz phased-array receivers based on an IF beam-forming architectures with good scalability.
Performance
-0.2 dB conversion gain (CG) with 6.5 GHz conversion gain 3dB bandwidth (BW) and 26 dB noise figure (NF) overall;
-18.1 dB CG with 16 GHz 3dB BW and 18.1 dB NF for the mixer and LO;
130 mW DC power consumption (85 mW for just the mixer and LO).