A closed-loop control architecture and a quasi-square-wave modulation method are proposed for two-stage (ACDC and DC-DC) solid-state transformer (SST) that regulates isolated common DC-link voltage in ...

A multiresonance antenna based on a nonperiodic square-ring metasurface (MS) is proposed, which has large bandwidth and stable radiation gain. The nonperiodic MS radiator is formed by several ...