A 200-GHz Modulable Transceiver With 35-dB TX ON/OFF Isolation and 16Gb/s Code Rate for MIMO Radar in 130nm SiGe Process

This paper presents a 200-GHz modulable transceiver for multiple-input multiple-output (MIMO) radar applications. The transmitter consists of a ×6 amplifier multiplier chain, a mode-switchable modulator, an ON/OFF-isolation-enhanced PA, and an on-chip self-filtering folded-dipole antenna. The mode-switchable modulator provides phase and amplitude modulation capabilities, suitable for achieving waveform orthogonality in MIMO radars. PA with ON/OFF isolation enhance technology can provide high switching isolation at the saturated output. To obtain a low noise figure (NF), the receiver consists of a wideband low-noise amplifier and an I/Q mixer. The measurement results show a peak output power of 10.3 dBm at 184 GHz, and a peak EIRP of 12 dBm with a 4-dB bandwidth from 180 to 232 GHz without lens. The receiver exhibits 24 dB conversion gain and 12 dB single sideband NF. Furthermore, phase and amplitude modulation ability is demonstrated by a Non-Return-to-Zero (NRZ) signal with 35-dB ON/OFF isolation and 16 Gb/s code rate.