The design of full-band (3.1–10.6GHZ) CMOS UWB low noise amplifier with thermal noise canceling

This paper presents the design of an ultra wideband (UWB) low noise amplifier (LNA), operated in the range from 3.1 to 10.6 GHz, with noise canceling technology. A two-stage topology is adopted to implement an LNA based on the TSMC 0.18-um process. The first stage is the cascode configuration that is used to exploits negative feedback to enhance the bandwidth. In order to achieve simultaneously output impedance matching, the addition of a common drain is used behind the cascode stage to provide better output matching. And an RLC shunt-shunt feedback is used to attain the broadband gain requirement in the second stage. Noise figure of this LNA with noise canceling is below 3 dB in the range from 3.1 to 10.6 GHz. The simulated results show good performance of S₂₁ above 11 dB, and the flat 3-dB bandwidth covering this ultra wideband. The total circuit consumes a very low power of 27 mW.