A 0.184mm ² $W$-Band Single-RTWO-Based Subharmonic RX Achieving 3.72 dB-NF and I/Q Mismatch < 0.8° in 22 nm CMOS

We present a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$W$</tex>-band sub-harmonic IQ receiver (RX) featuring a single rotary traveling-wave oscillator (RTWO) integrated with an ADPLL. It addresses key challenges in conventional mmwave direct-conversion RXs: LO generation and distribution with poor phase noise (PN), IQ mismatch, high power consumption, large area, and high dc offset. RTWO multimodes are suppressed via asymmetric capacitance in the crossover of the Möbius ring. Fabricated in 22 nm CMOS, the RX demonstrates a 3.72 dB noise figure (NF), IQ mismatch <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$&lt;0.8^{\circ}$</tex> using a bundle-based calibration. It occupies a tiny area of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.184 \text{mm}^{2}$</tex> and has a total power consumption of 56.7 mW, including the ADPLL.