泄漏电缆

FFT在泄漏电缆周界入侵探测系统中的应用

The Using of FFT in the Leaky Cable Perimeter Intruder System

由于3G信号频率高，在地铁中的泄漏电缆损耗和空间损耗将大大增加，为了达到覆盖要求，必然要引入中继放大。

Repeaters have to be employed in metros to meet the coverage requirements because leakage cables and free spaces are much more spoiled due to high frequency of 3G signal .

特种通信电缆&泄漏电缆的研究

A Special Communication Cable & A Study of the Leaky Cable

最后文章提出了列车内架设泄漏电缆的方案。

Finally , the paper give proposes to set up the leaky cable in the train .

适用于闭域或半闭域空间无线通信用泄漏电缆研究

Research of leaky coaxial cable using for radio communication in the blind or semi - blind Zone

文中首先分析了周界入侵探测系统的工作原理和泄漏电缆的特性，研究了数字锁频技术。

Firstly , the work principle and the performance of leaky coaxial cable were studied , as well as the digital phase locking was emphatically researched .

泄漏电缆主要有耦合型和辐射型两种，适用于户外、野外高保安、长周界的安全防范场所。

There are two kind of leaky cable : coupled and radiant , which is applicable to outdoor , field highly security and long perimeter security alarm place .

关于泄漏电缆辐射场的理论方法求解复杂，其辐射场解的理想开放边界与实际使用环境存在一定差距。

The methods of research on the radiation field of LCX are almost theoretical operations , which almost assumed their radiation fields have the ideal opening boundary . This has disparity with the environment actually .

从周期性开槽泄漏电缆的辐射场特性的仿真结果还可以明显的看出随着开槽口的增加，泄漏电缆辐射方向性逐渐增强，辐射电场强度逐渐增加。

Through simulating and analyzing the radiation field characteristics of the LCX with periodical slots , we can clearly see that with the slots increasing the radiation directivity gradually enhanced and electric field intensity increased .

给出了适用于甚高频和超高频带无线通信用泄漏电缆的基本原理和实现方案，详细地论述了泄漏电缆单模辐射方式的特点和实现手段。

The fundamental principles and fulfilling scheme of LCX used for radio communication of VHF-UHF band are given , and the characters and fulfilling means of single mode radiating type of LCX are discussed in detail .

引入了泄漏电缆辐射方向、辐射损耗、传输损耗等主要特性参数的基础理论公式和数学模型，为闭域或半闭域空间实现双工无隙通信提供了一种行之有效的理论和实现方案。

Fundamental theory formulas and a mathematic model involving chief characteristic parameters such as radiating direction , radiating loss , transmitting loss of LCX are introduced , and an effective theory and fulfilling scheme for achieving duplex continuous communication in the blind or semi-blind zone are provided .

以有线通信理论、无线通信理论及天线理论为核心理论体系，对适用于闭域或半闭域空间实现双工无隙通信用泄漏电缆的基本理论体系和可行性进行了定性和定量的分析与研究。

Taking the theories of wire communication , radio communication and antennas as the core theory system , the basic theory system and feasibility of leaky coaxial cable ( LCX ) used for duplex continuous communication in the blind or semi-blind zone qualitatively and quantitatively are analyzed .

在2.5节中使用公式编程绘制曲线，在第四章中通过建立模型进行仿真也可以得到增加不同周期开槽口时泄漏电缆驻波比曲线的变化。

We use formula in the part 5 of chapter 2 program and draw curves of VSWR , in the forth chapter , through establishing different models and simulating the models , we can also see VSWR curve changes with the increased slots in different positions of the LCX .

本文根据参考文献（28）从理论上推导了通过增加周期性开槽口的方法来扩展频带宽度，用MATLAB编程绘出了增加的开槽口在不同位置时对应的泄漏同轴电缆驻波比的变化曲线。

Based on the Reference 28 , the article derive from the theory to expand bandwidth by adding periodic slots , use MATLAB program and plot the VSWR curves when increased slots in different positions of the LCX .

这些结论都说明了在泄漏同轴电缆实际应用中可以避开繁杂的理论推导而只需要使用HFSS仿真软件即可以得到泄漏同轴电缆的一些特性指标，为工程应用设计提供了很大的方便。

These conclusions illustrate that use the HFSS software can obtain some characteristics indicators of LCX , provide convenience in engineering application .

根据基本电磁理论，从理论上对泄漏同轴电缆（以后简称LCX）的辐射模式进行了分析，推导出其辐射场的数学表达式。

Starting from the basic electromagnetic theory , this paper theoretically analyzed radiation modes of leaky coaxial cable ( hereinafter LCX in short ) and deduced mathematical expression of its radiation fields .

目前磁浮列车采用的无线方式有三种，它们是38G毫米波、泄漏同轴电缆、无线感应技术。

Three methods has been adopted for these wireless communications in MAGLEV , they are 38G millimeter , leakage coaxial line and radio induction technology .

倾斜开槽泄漏同轴电缆耦合损耗的计算

Calculation of coupling loss of leaky coaxial cable with inclined slots

泄漏同轴电缆在周界报警装置中的应用

Application of leakage coaxial cable in perimeter annunciator

闭域空间泄漏同轴电缆和单极天线辐射场的比较

Comparison of the radiated field between leaky coaxial cable and monopole antenna in the blind zone

泄漏同轴电缆，是一种配置连续缝隙天线阵的馈电线。

Leaky Coaxial Cable & LCX , is one kind of coaxial cable with continual slots array antenna .

用于闭域空间无线通信的泄漏同轴电缆的电气特性研究

Research on Electrical Characteristics of Leaky Coaxial Cable ( LCX ) Used for Radio Communication in Confined Areas

而在隧道区间，特别是长隧道区间，用泄漏同轴电缆辐射覆盖较优。

But in tunnels , especially in long tunnels , it will be better to use leaking coaxial cable .

接着，讨论了泄漏同轴电缆的辐射条件、辐射波的三个工作频段。

In succession , discussed the radiation condition of Leaky Coaxial Cable , three working frequency bands of radiating wave .

搭建了报警装置的实验电路，可以检测到当有人通过泄漏同轴电缆时的信号变化。

I have built the experimental circuit , which can watch the signal changing when someone walked through the leaky coaxial cable .

本文的结论对泄漏同轴电缆在实际应用中的场预测和施工设计提供了依据。

The results of the article apply the foundation for the application of HFSS software in the field prediction and construction of the LCX .

之后，探讨了一种扩展八字开槽泄漏同轴电缆带宽的方法，为泄漏同轴电缆用于超宽带通信提供了一种可实践的途径。

After that , a method was explored for expanding the single mode radiation bandwidth of LCX with zigzag slots , providing a practical approach to apply LCX in ultra wide-band communication .

泄漏同轴电缆，也称连续天线，它是遵循特定的电磁场理论，沿着同轴电缆的外部导体周期性或非周期性配置开槽口而形成的。

The Leaky Coaxial Cable is also called Continue Antenna , it is formed by configuring slots along the outer conductor of Coaxial Cable periodically or unperiodically followed specifically electromagnetic field theory .

由于它可以沿其轴向和其径向周围空间辐射电磁能量，所以泄漏同轴电缆具有传输线和辐射天线的双重特性。

Because LCX can radiate electromagnetism energy to the outer space along the axial and radial direction of it , Leaky Coaxial Cable can be used as a transmission line and also a radiating antenna .

列车等车体与地面的通信可以通过毫米波或泄漏同轴电缆或铁轨实现，作者提出来的新型无线感应技术也能实现车体与地面的通信。

Communication between trains and floor devices can be realized by means of millimeter wave , leakage coaxial cable and truck . The new radio induction technology proposed by the author can also complete communication between trains and floor devices .