An Ultra-Wideband Cascaded Power Amplifier for Military Individual Radio

In recent years, there has been a tremendous interest in military individual radio in wireless communication. To obtain sufficient operating distance and long standby time, the output power and efficiency of power amplifiers have become the research focus by some of the research teams. GaN has higher electron mobility and forbidden bandwidth than other materials. Nowadays, GaN has become the mainstream key technology for radio frequency (RF) power amplifiers in 5G communication systems. In this work, a 500MHz~2500MHz GaN-based HEMT wideband cascaded power amplifier was designed. The output power of the driver amplifier is 36.6dBm ± 0.5dB, the input return loss is < -5dB, the drain efficiency is > 20%, the DC power consumption is < 25W, the input power is 5dBm, 1dB compression point is 7.8dBm, 0 dBm signal input and 33dBm signal output. The input power of the output stage is 36dBm; the output power is 44.75dB, the efficiency is more than 30%, and the input return loss < -8dB, small signal gain >10 dB, input voltage standing wave ratio < -10dB, output voltage standing wave ratio < -3dB. The demonstrated high performance of the cascaded power amplifier validates its applications in military wireless communication.