In this paper, the design and measured performance of a wideband (1.2-2.5 GHz), high efficiency, high linearity, Gallium Nitride (GaN), Class J, 200-W power amplifier (PA) is reported. The Class J PA output stages exhibit 45-62% power-added efficiency (PAE) and a near-maximum power match over 2:1 bandwidth, and impressive 802.11g WLAN linearity. This linear PA has 65 to 70-dB small-signal gain over this bandwidth.
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