中文摘要：

目前卫星载荷的设计寿命一般在15年左右,期间通信技术已发生了日新月异的变化。现有多频段、多波束卫星在入轨以后,其单端口的技术状态基本固定,一旦投入使用,针对不同波束业务需求,难以灵活地对卫星工作频率和带宽等资源进行重新分配。针对传统微波技术在多频段通用、可重构的技术瓶颈,探讨宽可调谐本振及分发技术、全光变频技术、光控波束形成技术和射频光交换技术等关键技术在一体化、通用化和在轨可重构卫星转发器方面的潜在应用价值。

英文摘要：

Normally a communication satellite payload has a lifetime of 15 years,and over such a long period of time the commu-nication technologies have evolved rapidly. Commonly,after the multi-beam,multi-band communication satellite payloads flying into orbit,the technical configuration of the RF port is fixed,and the radio system cannot dynamically adapt to different operational needs. Based on the bottleneck of traditional microwave technology for multi-band,reconfigurable signal processing in electronic domain,this article presents an overview of the microwave photonic techniques such as optically generated local frequency and distribution,all optical frequency conversion,photonic true-time delay beamforming as well as microwave photonic switching,and discusses their potential appli-cations in development of multi-band,reconfigurable satellite payloads.