2.4GHz power amplifier with adaptive bias circuit

A 2.4GHz power amplifier is designed using the HHNEC BiCMOS 0.18μm technology. The pseudo-differential structure and adaptive bias control technique are used to improve the performance. The load-pull technique is used for finding the adequate impedance values which provides the maximum output power. The simulation results show that under a supply voltage of 3.3V, P_1dB is better than 23dBm and PAE is better than 17%.