A Body-Floating G-Band Frequency Doubler for Astronomical Receiver in 90-nm CMOS Process

This paper demonstrates G-band frequency doubler in 90-nm CMOS process for astronomical receivers is showcased. A Marchand balun is used to improve signals with opposite phases and the same amplitude and adding body-floating to enhance high frequency performance. The measurement result shows that the proposed frequency doubler achieves a -11.9 peak conversion gain with 10 dBm input power. The 3-dB bandwidth ranges from 156- 196 GHz, totaling 40 GHz. with 20.5 mW power consumption. The chip size is 0.315 mm2.