Tunable, High-Isolation RF/Microwave Circulator

A new high-isolation RF circulator provides enhanced detection ranges (radar) and improved reception (communications) by reducing signal leakage and undesirable internal reflections between ports at a tuned frequency (or frequency range) of interest. Isolation values exceeding 70 dB have been demonstrated, which far exceeds the 20 dB typical to conventional three-port circulators.