航天器低压差分信号线束的电磁兼容性分析  

Electromagnetic compatibility of spacecraft low-voltage differential signaling bundle

作　　者：汪静[1] 阳彪[1] 刘艳丽[1] 刘宇丹[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器环境工程》2014年第1期97-101,共5页Spacecraft Environment Engineering

摘　　要：航天器有效载荷设备之间的高速率数据信号通过低压差分信号(LVDS)线束进行传输,因此,LVDS线束的电磁兼容性(EMC)对系统产生直接影响。文章首先通过专用的电磁兼容性仿真软件对航天器实际结构中的1对低压差分信号线束的传导特性进行了分析,之后,基于该分析结论,对由12对线束构成的设备间线束捆的串扰特性、外界电场辐射下线束的抗扰特性进行了分析。频域和时域仿真结果验证了文章所述航天器低压差分信号线束布局的合理性,为将该成果进一步推广至航天器系统级线束布局及优化奠定了基础。The high speed data of spacecraft transmitting between the payload equipment is through the LVDS（low-voltage differential signaling） bundle.The EMC （Electromagnetic Compatibility） of the LVDS bundles has a strong influence on the system performance. The conducted characteristics of an individual LVDS cable in the real spacecraft structure are analyzed by utilizing the appropriate EMC software.The crosstalk between 12 pairs of LVDS cables in a bundle is computed based on the above analysis of an individual cable. The radiating immunity of the LVDS bundle is taken into account. The results in the frequency and time domains show that the distribution of LVDS bundles is rational. So, it could be extended to guide and optimize the system-level layout of the bundles in advance for all spacecraft.

关 键 词：低压差分信号线束 电磁兼容性 仿真模型 频域分析 时域分析 

分 类 号：TN811.1[电子电信—信息与通信工程]