Ultra-wideband GaN RF power amplifier based on low-pass ladder matching network

This paper presents the design of an ultra-wideband RF power amplifier (RFPA) with high output power and high power added efficiency (PAE) in the 0.45-4.5GHz band. By adjusting the circuit in the low-pass filter matching network, the influence of parasitic devices is effectively suppressed, thus ensuring bandwidth and efficiency. The overall circuit structure is compact, has strong anti-interference ability, and can realize the combination of distributed modular components. The experimental results show that the output power of RFPA is stabilized in the range of 40.2-41.8dBm in the frequency band of 0.45-4.5GHz, and the drain efficiency is higher than 40%. This design will provide important technical support for the performance improvement and expansion of wireless communication systems.