Ku波段卫星地球站上行链路电平配置合理性分析与链路优化

本文根据Ku波段卫星地球站改造工程中实际遇到的上行链路电平配置问题,通过典型Ku波段卫星地球站上行链路电平计算,对上行链路电平配置的合理性进行分析,提出上行链路电平配置合理性判定标准及链路优化的相关措施。

一种L波段双通道解调器中频单元的设计

介绍了一种L波段双通道解调器中频单元的设计方案,主要分析了2个关键问题:频率配置和电平配置。对于频率配置:首先通过比较,证明了二次变频方案比直接变频方案更有优势;然后对二次变频方案中的难点—频率配置进行了详细分析。最后介绍滤波器的选择,分析了各种滤波器的作用并给出了具体型号的选择。对于电平配置,主要分析了增益配置和衰减器的配置。

A New Configuration for Planar Magnetic Elements to Reduce Capacitive Couplings

This paper presents an analysis of planar magnetic element configurations in order to reduce capacitive couplings between the windings. The capacitive couplings between layers of planar magnetic elements introduce a stray capacitor which can conduct high frequency currents when high dv/dt voltage is applied. High frequency current may cause electromagnetic interference （EMI） and harmonic problems. The investigation and simulation results, both 2D and 3D Finite Element （FE） show the effect of shifting the planar layers in reduction of the capacitive couplings. The simulation results are compared with test results to validate the proposition.