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RF Power Semiconductors


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A myriad of products and services utilize RF power amplifiers in their transmitter circuitry: wireless infrastructure for cell phones and other mobile devices; radio and television broadcasting; medical equipment such as MRI machines; materials curing that includes carpet fibers and plywood; radar; space and satellite communications; police and fire radios; and military communications and electronics of all kinds. Most of these transmitters use semiconductors in the RF power amplifier output stages. Even modern, extremely high-power broadcast transmitters that traditionally have used large vacuum tubes in their RF sections have finally begun to use solid-state devices.

This study examines RF power semiconductor devices that have power outputs of greater than three watts and operate at frequencies of up to 4 GHz, which represent the bulk of applications in use today. In addition, an enhanced section on gallium nitride (GaN) devices has been added this year.