Microwave active ring resonator based on spin-wave delay line

The complex transmission coefficient of active ring resonators based on spin-wave delay lines was investigated both theoretically and experimentally. Influence of the parameters of the delay line on the transmission coefficients was studied and analyzed. It was shown that the resonant frequencies that define the bandpasses of the ring resonator depend on the ferrite film thickness and the distance between spin-wave antennae. These dependences give possibility to reconfigure the transmission coefficient that in combination with magnetic tuning provide flexibility for microwave applications.