An RF amplifier, or radio frequency amplifier, is an electronic device that increases the power of radio frequency signals. These signals are used in various applications, including telecommunications, broadcasting, and wireless communication. By boosting the signal strength, RF amplifiers help improve the quality and range of transmitted information. RF amplifiers work by taking a weak input signal and amplifying it to a higher output level without significantly distorting the original signal. They are essential components in devices like cell phones, radios, and television transmitters, ensuring that signals can travel long distances and maintain clarity.