Abstract
A K-band low-noise amplifier (LNA) was realized in a standard 0.18-μm CMOS technology. The cascaded common-source configuration of four stages was adopted for low voltage operation and high gain performance. In addition, the gate-source transformer feedback technique was employed to achieve a low noise figure (NF), which also enabled a single power supply operation and without using any resistive components. Under a supply voltage of only 0.8 V and a DC power consumption P DC of 12.6 mW, the measured gain and NF are 14.5 and 5.3 dB at 21 GHz, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2202-2204, 2009 Published online in Wiley InterScience (www.interscience.wiley.com).