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A 920 MHz low noise amplifier (LNA) design for UHF RFID reader application, requiring one external inductor and matched to 50 Ω at the output, has been implemented in a standard analog 0.8-μm CMOS technology. Cascode topology is used in the design provide good gain and moderate noise figure. High frequency inductor model is also presented. Simulated noise figures for the LNA are 2.02 dB at 197 mW, and 2.81 dB at 28.2 mW. The LNA has a power gain of 15.7 dB, and an IIP3 of 3 dBm at 197 mW. The LNA has a power gain of 12.46 dB, and an IIP3 of 2.61 dBm at 28.2 mW.
Date of Conference: 12-14 Sept. 2006