A 24-GHz single-to-differential LNA for K-band receiver applications

In this paper, a 24 GHz single-to-differential LNA for K-band receiver applications is presented. The proposed 24 GHz single-to-differential LNA is composed of three stages: two cascode stages and one active balun stage. To reduce the power dissipation of the circuit, the first two-stage is utilized as single-end signal and the last stage is composed of common-source combined with common-gate to transform the single-end signal to differential signal. The proposed LNA is implemented through TSMC 0.18-μm 1P6M CMOS process. Simulation results show that the proposed LNA can get 18.4 dB voltage gain, 4.5 dB NF at 24 GHz with 11.8 mA current consumption. Comparison between this work and those published has been given for its feasibility. It's shown that this proposed LNA is very suitable for K-band receiver applications.