文摘
In this work, a very low-harmonic distortion with high power-added efficiency (PAE) power amplifier (PA) with slotted microstrip lines is reported. The circuit is a push-pull class E amplifier, terminated with defected structures to improve the spectrum purity and efficiency. The relationship of the second and third harmonic to the fundamental is 70 and 54a0;dBc, respectively. The amplifier is developed with HBT medium power transistors. The circuit works at 1.8a0;GHz obtaining a PAE close to 60 % , delivering an output power of 24a0;dBm with a power gain of 13.3a0;dB.