一种多模馈源的设计

介绍了一种X波段多模馈源的设计方法,采用多种的魔T形成和差网络,多模喇叭的波束宽度、零值深度与边沿照射电平结合天线的系统要求确定其结构尺寸,具有零值深、零点漂移小、隔离度高、驻波系数低及耐大功率的特点。

宽带高选择性调谐滤波器设计

本文通过对比不同调谐特性的电抗元器件,给出具有高选择性调谐滤波器的电路架构,通过对电路层级的仿真分析和不同材料工艺的选择,提出具有小型化、高选择性、宽频段、大功率容量的宽带调谐滤波器的设计。

Capacity Maximization Based Power Loading Analysis for Digital Channelized Satcom Systems

For digital channelized frequency division multiple access based satellite communication(SATCOM) systems,it is a challenging but critical issue to improve the transponder power and spectrum efficiency simultaneously under limited and non-linear high-power amplifier conditions.In this paper,different from the traditional link supportability designs aiming at minimizing the total transponder output power,a maximal sum Shannon capacity optimization objective is firstly raised subject to link supportability constraints.Furthermore,an efficient multilevel optimization(MO) algorithm is proposed to solve the considered optimization problem in the case of single link for each terminal.Moreover,in the case of multiple links for one terminal,an improved MO algorithm involving Golden section and discrete gradient searching procedures is proposed to optimize power allocation over all links.Finally,several numerical results are provided to demonstrate the effectiveness of our proposals.Comparison results show that,by the MO algorithm,not only all links' supportability can be guaranteed but also a larger sum capacity can be achieved with lower complexity.

离网型太阳能照明工程研究

随着能源日渐枯竭,太阳能的研究与应用也愈来愈受世界各国重视。作为太阳能主要应用之一的离网型太阳能照明工程主要由:太阳能应用方案分析、工程设计及具体建设三部分构成。本文针对离网型太阳能照明工程的核心,对太阳能应用方案进行了详细深入的分析,提出了太阳能工程设计关键——太阳能配置的解决方案,并解决了工程具体建设中最主要的太阳能电池板安装问题,结合实际工程案例进行详细的分析与阐述。