Power-efficient W-band (92–98 GHz) phased-array receive element with quadrature-hybrid based passive phase interpolator

This paper presents a W-band phased array receive (Rx) channel that employs a quadrature-hybrid based power-domain phase interpolator for a power-efficient multi-bit phase synthesis. The Rx channel implemented in 0.13 μm SiGe BiCMOS achieves 137 dBHz dynamic range (DR) with total 18 mW DC power consumption at 94 GHz. This leads to 7.6 dB-Hz/mW of Rx DR efficiency figure of merit, one of the best power efficiencies reported so far in integrated phased array receivers at mm-Wave frequencies. The measured average gain is 21 dB at 94 GHz and RMS gain variation over 4-bit phase states is <; 1.4 dB (3-dB BW: 92-100 GHz). The measured RMS phase error is <; 2.5° at 94 GHz. The measured NF is 5.7-6.7 dB for all over the phase states and typical IP
_-1dB
is -31.4 dBm at 94 GHz. The core chip size of the receiver is 1.2×0.58 mm
²
.