宽带漏泄同轴电缆的设计与实现

发布时间：2018-04-12 18:37

  本文选题：漏泄同轴电缆 + 纵向衰减　； 参考：《西安电子科技大学》2015年硕士论文

【摘要】：漏泄同轴电缆(简称漏缆)是一种外导体具有槽孔结构的同轴电缆。它既能传输信号又能发射或接收信号,具有信号传输线与天线的双重功能。漏缆因其环境适应能力强、损耗小、信号覆盖均匀、场强稳定性高等优点,不仅广泛应用于隧道、地铁、地下停车场、电梯等对信号接收质量要求高的封闭或半封闭空间,还应用于日益备受关注的安防领域。论文针对地铁、高铁无线通信系统用宽带漏泄同轴电缆的应用需求,依据通信行业标准YD/T2491-2013,阐述了漏泄同轴电缆的理论基础,设计了L形、U形、Ⅲ形和八字形四种不同槽孔结构的漏缆,建立了基于三维电磁仿真软件HFSS的漏泄同轴电缆电磁仿真模型。以漏缆主要电气性能指标为研究目标,针对不同工作频率,基于四种不同周期槽孔结构的漏泄同轴电缆,利用电磁仿真软件分析了槽孔节距与槽孔尺寸的变化对耦合损耗与纵向衰减的影响。针对工作频率900MHz的漏缆,优化了外导体含有L形、U形和八字形三种槽孔结构的纵向衰减与耦合损耗特性。设计和实现了U形和Ⅲ形漏泄同轴电缆。并实际测量了纵向衰减和耦合损耗,实测结果和仿真结果吻合良好。通过仿真分析和样品实测表明U形和Ⅲ形漏缆设计满足无线通信系统标准要求。
[Abstract]:Leaky coaxial cable is an outer conductor coaxial cable with slot structure.It can transmit signal and transmit or receive signal. It has the dual function of signal transmission line and antenna.Because of its strong adaptability to environment, low loss, uniform signal coverage, high stability of field strength and so on, leakage cable is not only widely used in closed or semi-closed space of tunnel, subway, underground parking lot, elevator and so on, which requires high quality of signal reception, etc.It is also used in the field of security, which is attracting more and more attention.Aiming at the application demand of wideband leakage coaxial cable for subway and high-speed railway wireless communication system, according to YD / T2491-2013, the paper expounds the theoretical basis of leakage coaxial cable, and designs L-shaped coaxial cable.The electromagnetic simulation model of leakage coaxial cable based on 3D electromagnetic simulation software HFSS is established.Aiming at the main electrical performance indexes of leaky cable, the leakage coaxial cable based on four different period slot structures is designed for different working frequencies.The effects of slot pitch and slot size on coupling loss and longitudinal attenuation are analyzed by electromagnetic simulation software.The longitudinal attenuation and coupling loss characteristics of external conductors with L-shaped U-shaped and octahedral grooves are optimized for leakage cables of 900MHz at operating frequency.U-and 鈪，

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