Overview of Metamaterial-based Vacuum Electron Devices at UESTC

In this talk, the new electromagnetic properties of metamaterial are presented. Next, two different types of metamaterial unit cells are reported. And then, the research advances in the microwave vacuum electron devices using these metamaterial unit cells with miniaturization, high efficiency, high power or high gain are summarized. Finally, the challenge and outlook are given. These research achievements benefit the vacuum electron devices society in developing next generation devices, which can be used in new application scenarios.