Design technique of broadband LDMOS cascaded RF power amplifier

This work discusses on the design of broadband LDMOS cascaded RF power amplifier (PA) for mobile two-way radio applications. The main focus of this research is centered towards developing the matching network for the PA line up. A design technique of broadband LDMOS cascaded RF power amplifier is introduced here. Impedance transformation by parallel matching network is the core value of this work. Measurement results shows the PA line up is capable of delivering total output power of up to 80W with efficiency of 55% across 760–870MHz. According to author's best knowledge, the proposed cascaded line up demonstrated highest efficiency with total gain of 45dB with 13V DC supply for UHF band.