What is the primary purpose of an RF amplifier?

The primary purpose of an RF amplifier is to enhance low-level radio frequency signals. This function is critical in various applications such as communications, broadcasting, and signal processing, where weak RF signals need amplification to ensure they can be processed or transmitted effectively.

RF amplifiers are designed specifically to handle frequency ranges associated with radio frequencies, which can often be quite weak when received by antennas. By boosting these signals, RF amplifiers help improve the overall signal-to-noise ratio, making it easier to discriminate useful signals from background noise and other interference.

The amplification process does not solely relate to voltage increase; it focuses on enhancing the signal strength to a usable level while maintaining the signal's integrity. Thus, option B accurately reflects the essential role of RF amplifiers in electronic systems, facilitating clearer reception and transmission of signals in communication devices and systems.