CN201274498Y - 一种同轴电缆调制解调器 - Google Patents

一种同轴电缆调制解调器 Download PDF

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CN201274498Y
CN201274498Y CNU2008201456577U CN200820145657U CN201274498Y CN 201274498 Y CN201274498 Y CN 201274498Y CN U2008201456577 U CNU2008201456577 U CN U2008201456577U CN 200820145657 U CN200820145657 U CN 200820145657U CN 201274498 Y CN201274498 Y CN 201274498Y
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coaxial
coaxial cable
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黄宗荣
林涛
刘兵
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JINQIANMAO TECHNOLOGY CO., LTD.
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FUJIAN JINQIANMAO ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

本实用新型公开了一种能够通过现有的同轴电缆实现各种网络设备上网的同轴电缆调制解调器，其联接于以太网线与同轴电缆之间，其包括以太网物理层收发单元，调制解调本体和耦合器，调制解调本体与以太网物理层收发单元联接，以太网物理层收发单元通过以太网接口单元与以太网线联接，调制解调本体经过耦合器联接于同轴电缆，调制解调本体包括数模转换单元和信号放大单元。本实用新型能够通过现有的同轴电缆，无需改造现有的布线就可以实现各种网络设备的上网，且能够避免电力线传输存在的噪声大和安全性低的问题。

Description

一种同轴电缆调制解调器
技术领域
本实用新型涉及一种同轴电缆调制解调器，具体是指一种能够通过原有的同轴电缆实现各种网络设备上网的同轴电缆调制解调器。
背景技术
电力线通信(Power line Communication)简称＂PLC＂，是利用输电和供电的电力线进行高速数据传输的技术。电力线遍布城市和乡村，PLC通过电力线传输数据，不需要增设更多的线路及设备，只需将调制解调器***电力插座就可以通信，使用简单，成本低廉，有利于信息资源共享和家电上网。Home Plug全称是Home Plug Power Line Alliance，译为家庭插电联盟，该联盟致力于为各种信息家电产品建立开放的电力线互联网络接入规范。其未来目标是，只需在事先安装好的万能插座上***电源插头即可构筑起局域网。新技术运用普通的电力线可以传输因特网的资料，所有电话、传真机、电脑及电视、摄像机等家用电器将来都可以直接用墙壁的电线插座互联在一起。但是目前利用Home Plug标准技术在电力线上传输网络宽带信号，存在明显的缺点就是噪声大和安全性低的问题，而在同轴电缆上传输就可以避免这些问题。
实用新型内容
本实用新型的主要目的在于针对目前宽带入户改造困难的问题，提供一种同轴电缆调制解调器。
为实现上述目的，本实用新型采用如下结构：
一种同轴电缆调制解调器，联接于以太网线与同轴电缆之间，包括以太网物理层收发单元，调制解调本体和耦合器，调制解调本体与以太网物理层收发单元联接，以太网物理层收发单元通过以太网接口单元与以太网线联接，调制解调本体经过耦合器联接于同轴电缆。
如上所述的同轴电缆调制解调器，其中，所述的调制解调本体包括数模转换单元和信号放大单元，数模转换单元联接于所述的以太网物理层收发单元，并通过信号放大单元联接于所述的耦合器。
本实用新型的有益效果是可充分利用现有的同轴电缆，无需改造现有的布线就可以实现各种网络设备的上网，又能够避免电力线上网存在的噪声大和安全性低的问题。
附图说明
图1是本实用新型的原理方框图。
主要组件符号说明：
1-以太网物理层收发单元  2-调制解调本体  3-耦合器  21-数模转换单元  22-信号放大单元
具体实施方式
如图1所示，一种同轴电缆调制解调器，联接于以太网线与同轴电缆之间，包括以太网物理层收发单元1，调制解调本体2和耦合器3，调制解调本体2与以太网物理层收发单元1联接，以太网物理层收发单元1通过以太网接口单元与以太网线联接，调制解调本体2经过耦合器3联接于同轴电缆。调制解调本体2包括数模转换单元21和信号放大单元22，数模转换单元21联接于所述的以太网物理层收发单元1，并通过信号放大单元22联接于所述的耦合器3。
从以太网线过来的数据信号通过以太网接口单元传到以太网物理层收发单元1，再传到数模转换单元21转换成模拟信号，然后送到信号放大单元22放大，最后通过耦合器3耦合到同轴电缆上；从同轴电缆上过来的模拟信号通过耦合器3耦合到信号放大电路22，经过信号放大单元22放大后的模拟信号送到数模转换单元21转换成数据信号，再传到以太网物理层收发单元1，最后通过以太网接口单元传到以太网线上。
所述的数模转换单元21可采用INTELLON公司提供的INT6300，所述的信号放大单元22可采用INTELLON公司提供的I60，INT6300是INTELLON公司提供的一款符合Home Plug规范的电力线上网IC，这里把Home Plug技术应用到同轴电缆上网上，能够避免电力线上网存在的噪声大和安全性低的问题。
INT6300的内核为ARM926EJ-S的32位RISC处理器(精简指令集计算机采用的微处理器)，***的软件存储在大容量的SPI FLASH(高速同步串行口闪速存储器)中。可以设置***启动时，启动代码存放在SPIFLASH中。当***启动时，所有程序拷贝到SDRAM(同步动态随机存取存储器)中。INT6300有3种工作模式：MII PHY模式、MII MAC模式、PCI模式，在此设置为MII MAC工作模式。
INT6300与PHY芯片相联接，PHY通过一个RJ45接口联接于以太网线，以太网线过来的数据信号通过RJ45传到PHY芯片，再通过MII接口传到INT6300，INT6300把数据信号变为模拟信号，模拟信号再经过I60放大电路放大，然后经过耦合器耦合到同轴电缆上，发送到同轴电缆上的信号频率范围是：2MHz-28MHz。
同轴电缆上过来的信号传到耦合器的同轴电缆接收部分，耦合器的同轴电缆接收部分为一个LC的带通滤波电路，这个带通滤波的频率范围是2MHz-28MHz，经过耦合器出来的信号经过I60放大电路放大后，再送到INT6300，INT6300把模拟信号变为数据信号，数据信号通过MII接口传到PHY芯片，再通过RJ45传到以太网线上。
由于同轴电缆是一种共享式的总线，因此INT6300应该工作在半双工模式下，即发射时，接收部分的电路不工作，接收时，发射部分不工作。

Claims (2)

1、一种同轴电缆调制解调器，联接于以太网线与同轴电缆之间，其特征在于：包括以太网物理层收发单元，调制解调本体和耦合器，调制解调本体与以太网物理层收发单元联接，以太网物理层收发单元通过以太网接口单元与以太网线联接，调制解调本体经过耦合器联接于同轴电缆。
2、根据权利要求1所述的同轴电缆调制解调器，其特征在于：所述的调制解调本体包括数模转换单元和信号放大单元，数模转换单元联接于所述的以太网物理层收发单元，并通过信号放大单元联接于所述的耦合器。
CNU2008201456577U 2008-09-23 2008-09-23 一种同轴电缆调制解调器 Expired - Lifetime CN201274498Y (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437940A (zh) * 2011-09-14 2012-05-02 福建金钱猫电子科技有限公司 一种光电转换接入装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437940A (zh) * 2011-09-14 2012-05-02 福建金钱猫电子科技有限公司 一种光电转换接入装置
CN102437940B (zh) * 2011-09-14 2014-03-19 福建金钱猫电子科技有限公司 一种光电转换接入装置

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