Linearity is described as a standard to an RF amplifier, it has several indicators to judge an amplifier's working ability and further to confirm if it is suitable for different applications. The indicators include P1dB, IMD3, ACPR and Harmonics.
Linearity is an essential standard for a power amplifier(PA) determined by the transistor's property. It can directly impact PA and decide if it can work adequately in RF systems. Of course, it will have a specific requirement in different projects and strategies and, finally, reflect on the amplifier's output ability and characteristic performance.
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