A 60–90 GHz Passive Mixer-First Receiver in 22-nm SOI CMOS

Multiple-input multiple-output (MIMO) wireless communication systems are susceptible to the intermodulation of the multiple signals received and strong blockers, neces-sitating high in-band and out-of-band (OOB) linearity. This work introduces a mixer-first front-end architecture that in-corporates a trans-impedance amplifier (TIA) with a capacitive positive feedback technique to leverage second-order filtering, thus improving the resilience of the receiver (RX) to spectral blockers. The RX is designed using 22-nm FD-SOI technology and demonstrates excellent input matching across the frequency range of 60–90 GHz. Moreover, the RX achieves a conversion gain of 19 dB while maintaining a moderate noise figure (NF). This gain is accomplished by cascading an amplifier to the TIA and employing the complementary derivative superposition technique to enhance the in-band input third-order intercept point (IIP3). The RX exhibits minimum in-band IIP3 of 4.9 dBm and OOB IIP3 of 42 dBm. indica ting improved linearity performance.