58-72 GHz CMOS wideband variable gain low-noise amplifier

A V-band wideband variable gain low-noise amplifier (VGLNA) with a 3 dB bandwidth of 14 GHz (58-72 GHz) is developed in a 65 nm RFCMOS technology. The three-stage VGLNA, adopting the current steering method for the gain control, shows a measured peak power gain of 21.8 dB with a 1 dB gain flatness of 10 GHz (60-70 GHz). With tuning voltage adjusted from 0.8 to 2.8 V, the gain and noise figure are varied from 21.8 to 12.8 dB and from 4.2 to 5.7 dB, respectively, at 64 GHz. Input P_-1dB was measured to be -22.1 dBm. DC power consumption is 36 mW with V_DD = 1.2 V and the chip size is 0.75 × 0.65 mm.