A Compact Ferrite Microstrip Limiter Loaded Meander Structure With Traveling Wave Transmission Mode

This work proposes an innovative meander microstrip structure utilizing the traveling-wave mode (TWM) to address the challenges of high insertion loss (IL) and large size in polycrystalline yttrium iron garnet (YIG) limiters. Compared to traditional standing-wave mode (SWM), the TWM microstrip effectively reduces IL. Additionally, the folded traveling-wave structure minimizes the size of the ferrite and significantly improves limiter isolation. The effectiveness of this approach is validated through simulation, high-power microwave (HPM) injection experiments, and radiation tests.