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Abstract In this article, a power amplifier with 47 dBm (50W) output power in the frequency range of 1.7 GHz − 1.9 GHz, 60.1%-63.3% drain efficiency at maximum output power and 40.5%-46.8% drain efficiency at 6dB output back-off has been designed and manufactured by using LMBA technique. Microwave simulators were utilized in power amplifier design. The finalized design of the load modulated balanced power amplifier and its subsystems were manufactured. The produced LMBA system was tested at RFTR Elektronik A.Ş. facilities with calibrated RF measurement devices and various measurements were made. The measurements of the manufactured system and the simulation results were observed to be very close to each other. It has also been shown that the efficiency of the system increases both at maximum output power and at 6 dB output back-off when using the LMBA technique. In addition, the PA designed with the LMBA technique having 50 W minimum power, providing drain efficiency of 60% over the entire operating band at maximum power and drain efficiency of 40% or more at 6dB output back-off, it is seen that better results are obtained compared to similar studies in the literature.
Mehter et al. (Wed,) studied this question.