Limiter, also known as a self-regulating attenuator and a power modulating device, allows signals to pass without attenuation when the input signal is low. However, as the input power increases beyond a certain threshold, the attenuation increases rapidly. This power level is referred to as the threshold level, and once the input power surpasses this level, the output power no longer increases. It is commonly used in microwave sweep signal sources or phase detection systems to maintain a stable output signal amplitude. Additionally, it can be employed for input protection in electronic components of communication, remote sensing, radar systems, and high-frequency instruments. The limiter boasts wide operating frequency, low insertion loss, stable performance, and excellent shielding, providing your equipment with safety protection against damage caused by excessive RF power, DC voltage transients, or static discharge (ESD).