An RF attenuator is a device designed to reduce the power level of a radio frequency (RF) signal without significantly degrading its quality. It achieves this by introducing a controlled amount of resistance into the signal path, thereby decreasing the signal amplitude. RF attenuators are essential in various applications to manage signal levels, prevent overload in sensitive components, and improve measurement accuracy. In practical use, RF attenuators are often employed in cellular DAS / IBC to protect equipment from high-power signals from the BTS or repeater that could cause damage. They are also used to match signal levels between different stages of a system, ensuring that components operate within their optimal range. Additionally, RF attenuators help in minimising reflections in transmission lines by providing impedance matching, which is crucial for maintaining signal integrity. Attenuators are available in fixed or variable configurations.