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A two-stage differential linear power amplifier(PA) fabricated by 0.18μm CMOS technology is presented. An output matching and harmonic termination network is exploited to enhance the output power,efficiency and harmonic performance.Measurements show that the designed PA reaches a saturated power of 21.1 dBm and the peak power added efficiency(PAE) is 35.4%,the power gain is 23.3 dB from a power supply of 1.8 V and the harmonics are well controlled.The total area with ESD protected PAD is 1.2×0.55 mm~2.System measurements also show that this power amplifier meets the design specifications and can be applied for RFID reader.
An output matching and harmonic termination network is exploited to enhance the output power, efficiency and harmonic performance. Measurement show that the designed PA reaches a saturated power of 21.1 dBm and the peak power added efficiency (PAE) is 35.4%, the power gain is 23.3 dB from a power supply of 1.8 V and the harmonics are well controlled. The total area with ESD protected PAD is 1.2 × 0.55 mm ~ 2 .System measurements also show that this power amplifier meets the design specifications and can be applied for RFID reader.