Ferrite-Based Reflective-Type Frequency Selective Limiters

Ferrimagnetic materials possess unique nonlinear properties at RF/microwave frequencies that enable analog signal processing effects such as frequency selective limiters (FSL) with low-loss (<; 3 dB), low power thresholds (<; -20 dBm), flat limiting response, high selectivity (<; 5 MHz), and rapid response times (<; 5 us). FSL technologies can be used to add capability to radar, electronic warfare, and communications systems by protecting them from high power microwave attack, preserving sensitivity to signals-of-interest, and extending front end receiver dynamic range. Recent developments in reflectivetype FSL devices are presented here.