A 77 GHz CMOS requency triplers with subharmonic injection locking technology

Abstract

In this article, a novel 90‐nm gate length CMOS injection‐locked frequency tripler that generates the 77 GHz output signal is proposed. The output signal frequency of proposed tripler could be locked precisely by using a one‐third frequency local oscillator, which is beneficial for obtaining a wide tuning range and a low‐phase‐noise performance. In addition, the slow wave elevated‐center coplanar waveguide transmission lines were adopted to reduce the chip size. The locked output frequency range is from 77.34 to 80.32 GHz together with a phase noise of −83.24 dBc/Hz at 1 MHz offset. The 0.81 mm2 tripler (including passives) consumes 6.52 mW DC power under a 1.2 V voltage supply. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:434–439, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27336