Low-power and high-linearity SiGe HBT low-noise amplifier using IM3 cancellation technique
In order to achieve high linearity and low noise figure (NF) simultaneously, a modified cascode structure with a series-shunt feedback capacitance achieving third-order intermodulation (IM3) cancellation is proposed. The proposed LNA is designed and simulated for 5.7GHz wireless local area network (WLAN) band applications with a 0.35?m silicon germanium (SiGe) bipolar-CMOS (BiCMOS) process. The LNA has the power gain of 16.25dB, NF of 2.79dB, IIP3 of 3.69dBm with 4mW DC power consumption from a supply voltage of 3V. To our knowledge, by comparison with recently reported LNAs, the presented LNA achieves the highest figure of merit (FOM) by taking into account the power gain, IIP3, NF, power consumption, and operation frequency.
sige im3 cancellation technique series-shunt feedback wireless local area network low noise amplifier