A 138GHz down-conversion mixer with a branch-line coupler has been developed based on a 90nm CMOS technology. The fabricated mixer shows a differential conversion gain of 3.7dB with the mixer core drawing a current 0.66mA from a 1.2V supply. The 1dB gain compression point is estimated to be larger than -6dBm. The mixer occupies 0.61 × 0.62mm 2 of chip area excluding pads.
ASJC Scopus subject areas
- Electrical and Electronic Engineering