径向电子注器件采用径向电子注与电磁波相互作用从而产生和放大电磁信号，与传统的线性电子注器件相比，具有尺寸小、电压低、易聚焦、效率高、频带宽、高可靠、方便集成等优势。本项目将提出全新结构的径向电子注器件-角度对数周期互作用电路径向电子注器件的新概念，建立完整的径向电子注器件的理论分析体系，研究径向电子注器件的快速优化设计方法，开发出具有自主知识产权的模拟软件；研制成功低电压、小尺寸、宽频带、高可靠的平面化Ka波段径向电子注器件；在径向单电子注器件的基础上，还将提出径向多电子注平面器件角度集成的新概念，通过角度集成技术，不但可以进一步提高径向注器件的输出功率，还可以多端口输出方便相控阵系统应用。通过对径向电子注器件的研究，将丰富真空电子学的理论体系和器件种类，促进小型化、低电压平面真空电子器件的研制，应用于有源相控阵系统、卫星通信、电子对抗等领域。

The radial sheet electron beam device is a new kind of important vacuum device generating or amplifying the electromagnetic signal, in which the radial sheet electron beam is ultilized to interact with the slow electromagnetic wave propagating along the surface of the slow wave structure. Compared with the conventional linear electron beam device, it has some advantages, such as small size, low voltage, high effieciency, broad bandwidth, high reliability, easilly integrating and so on. In this project, a new kind of radial electron sheet beam device with special logrithmic periodical slow wave structure will be developed, the log-periodical slow wave structure has good application prospect in the radial sheet beam devices for its very small geometrical dimension and very low operating voltage. Furthermore, an integreted theoretical system for the radial sheet beam devices will be set up firstly, then the optimized fast design method will be given, and a software package will be developed besed on the above mentioned theory. On the basis of the single radial sheet beam device, an angular integration concept for the radial sheet beam device will be put forward because of its planar geometry, in which many radial sheet beam devices can share one common cathode and be integrerated in one circular to generate higher output power. By studying the radial sheet beam devices, the vacuum electronics theoretical system and the device types will be enriched, and it also can promote the development of low voltage, small size and planar vacuum electron devices. The radial sheet electron beam devices can not only be used in the active phase array radar, satellite communication systems, but also can be used as the vacuum booster of the electronic countermeasures, and so on.