A RF CMOS low noise amplifier for WiMAX applications

In this paper, a radio frequency (RF) CMOS low noise amplifier (LNA) for WiMAX applications is presented. In this amplifier, it is used a high-Q active inductor with band selector and a differential output configure to operate at three different frequency bands and obtain low noise figure (NF), high enough power gain, and low power consumption. Using TSMC 0.18um process, the proposed amplifier can be simultaneously operated multi-band at 2.6GHz, 3.6GHz, and 5.5GHz for WiMAX applications. Simulation results show that the proposed LNA have the forward gain of 35.7dB, 33.4dB, and 17dB, the IIP3 of −11.6dBm, −7dBm, and −9dBm, the noise figure of 1.2dB, 1.4dB, and 0.16dB, and the 1dB compression of −14dBm, −12dBm, and −9dBm in the 2.6GHz, 3.6GHz, and 5.5GHz frequency bands, respectively. The power consumption of the proposed amplifier is about 16.4mW, 21mW, and 12.7mW at 1.8V power supply in the 2.6GHz, 3.6GHz, and 5.5GHz frequency bands, respectively.

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