Skyrocketing demand for high data throughput in modern wireless communication systems is leading to the use of high peak-to-average-power-ratio (PAPR) signals. This situation poses a challenge to RF power-amplifier (PA) designs for future mobile communication systems. The Doherty PA (DPA) has been widely adopted in base-station infrastructure due to its excellent ability to maintain high efficiency over an extended power range.1 As a result, DPA bandwidth has become a research
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