A 30-GHz Bandwidth Low-Power W-Band 4-TX and 4-RX Chipset for High-Resolution Radars in 65 nm CMOS.

This paper presents a low-power W-band transceiver chipset that supports 30-GHz bandwidth for high-resolution for frequency-modulated continuous-wave (FMCW) radars. The transmitter chip consists of four transmitting channels (TX) and a wideband local oscillator (LO) network that achieves high harmonic rejection across the full bandwidth. The receiver chip consists of four receiving channels (RX) with an N-path mixer-first architecture and shares the same LO structure. To achieve a wide bandwidth high in-band harmonic rejection, the LO network consists of a $\times$8 frequency multiplier by cascading three balanced push-push doubler and wideband drivers. Fabricated in 65-nm CMOS process, the transmitter achieves 10-dBm output power and a 34 to 54~dBc harmonic rejection ratio (HRR) in 65 - 95~GHz . The receiver has a conversion gain of 15~dB. The power consumption per channel is 192~mW and 97~mW in the TX and RX chips, respectively, showing low power feature in wideband W-band radar transceivers