A low power WiMAX LNA with noise cancellation

This paper presents a low noise amplifier (LNA) employing a noise cancellation technique for WiMAX applications. The design of LNA is based on the input impedance matching with noise cancellation in 0.35-mum standard SiGe BiCMOS process. The chip size is equal to 0.84 mm times 0.18 mm. The crucial simulated results include that the noise figure (NF) is below 2.1 dB in the frequency range of 2 GHz to 3 GHz, the gain is equal to 13.3 dB at 2.6 GHz, the input 1 dB compression point (IP_1dB) is 11 dBm, and the input-referred third-order intercept point (IIP₃) is 2.5 dBm. The power consumption is 13.2 mW from the supply voltage of 1.8 V. The NF is improved by 0.73 dB using a noise cancellation technique.