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==Radio Frequency Power Amplifier==
A radio frequency power amplifier (RFPA) is an electronic device designed to provide greater radio frequency (RF) power from its signal output port than the RF power supplied to its signal input port. RFPA's are used in many applications including cellular telephone systems, computer network systems, radio and television broadcasting, aviation, medical imaging and industrial applications. RFPAs use transistors or vacuum tubes to convert electrical energy
==Narrowband RF power amplifiers==
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