A High Gain, High-Efficiency Dual-Band Cascode Class-F PA for Ka-Band Application

This paper presents a high gain and high- efficiency dual band Cascode class-F power amplifier (PA) for Ka- band applications using 0.25μm GaN technology. Cascode Class-F PA is combined with a non-uniform step impedance transmission line and magic tee (MTEE) to illustrate a second harmonic balance matching technique. A second harmonic balance matching technique utilized to enhance the gain up to 30dB at the saturation power region. This technique also enhances the resonant circuits band properties. Magic tee helps to enhance an internal matching design. For maximum output power, drain efficiency, and PAE the fundamental and second harmonic impedances are to be accurately improved for the particular operating frequency. Measured results represent maximum output power of 45.1dBm, drain efficiency of 87% and power added efficiency (PAE) of 73.4%. The fundamental and second harmonic balance levels are adjusted at -21dBc to - 16dBc. The simulated and the measured results of the proposed power amplifier show the right constancy.