A SiGe Based 60 GHz Signal Source MMIC for MIMO Radar Application

In this paper, we present an MMIC with two different signal sources for a MIMO radar system. The MMIC is fabricated in a 130 nm SiGe technology with an it of 240 GHz and a fmax of 380 GHz. The MMIC consists of a Colpitts-Clapp VCO together with a divide-by-8-prescaler as the first signal source, and a bootstrapped gilbert cell frequency doubler, which is driven by an external signal source. With an output frequency of around 60 GHz, one of the two signal sources provides the input signal for multiple MIMO transceiver chips. The signal source can be selected depending on the orientation of the MMIC. The VCO provides two differential output signals from 50.4 GHz to 68.3 GHz and has a phase noise of -94 dBc/Hz at the center frequency with an offset frequency of 1 MHz. By supplying the VCO with 3.3 V, the power consumption is 194.04 mW. The frequency doubler has a maximum gain of -4.5 dB at the center frequency and consumes 43.56 m W from a 3.3 V power supply.