What is a RF amplifier?

The RF in RF amplifier is an abbreviation for "Radio Frequency", and since it means the high frequency used in mobile wireless communication such as radios and smartphones, RF amplifier refers to a high frequency power amplifier. General amplifiers have a function to amplify and output the input voltage or current, but in the case of RF amplifiers, this function is not used. The signal can be amplified by the gain. As a result, DC bias power is not lost as is, and can be used with relatively high efficiency for high-frequency power amplification. Also, it should be noted that the required electrical characteristics, that is, the type of amplifier, differ depending on whether the RF amplifier is used as a receiver circuit or a transmitter circuit. It is characterized by being able to amplify and convert high-frequency power without loss of DC power, and is considered to be an efficient RF amplifier. The type differs depending on whether it is used for the receiving circuit or the transmitting circuit.

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