A Ka-band low noise amplifier using standard 0.18 μm CMOS technology for Ka-Bnad communication system applications

A low-power-consumption (26.93 mW) 32-GHz (Ka-band) low noise amplifier (LNA) using standard 0.18 mum CMOS technology is reported. To achieve sufficient gain, this LNA is composed of three cascaded common-source stages. The output of each stage is loaded with a band-pass (or a high-pass) combination of L and C to provide parallel resonance, i.e. to maximize the gain, at the design frequency. This LNA achieved input return loss (S₁₁) of -13.3 dB, output return loss (S₂₂) of -13.4 dB, forward gain (S₂₁) of 10.2 dB, and reverse isolation (S₁₂) of -19.1 dB at 32 GHz. This LNA consumed only a small dc power of 26.93 mW. The chip area is only 740 mum times 500 mum excluding the test pads.