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高频载波信号在明线线路上传输必然向四周辐射一定的功率,要充分利用现有明线线路,提高明线复用指数,增加通信能力,就必须弄清明线辐射的影响,以确保通信的安全可靠。为此,在推广应用高十二路载波设备之初,我们曾组织力量对高十二路与十二路载波线路进行了辐射测试,现将测试结果及其简单分析介绍如下。 1.明线线路辐射的特点 由于明线线路的结构特点,在信号传输时会产生辐射,其特点是: (1)明线线路由两条平行导线组成,系统在阻抗匹配条件下运行,载波电流以行波方式传向负载,在理想情况下不会向空中辐射。由于线路不均匀与阻抗匹配不良才导致少量辐
High-frequency carrier signal in the bright line transmission must inevitably radiate to the surrounding a certain amount of power, to make full use of the existing line line, to improve the bright line multiplexing index, increase communication capabilities, it is necessary to understand the impact of bright line radiation to ensure safe and reliable communication . For this reason, at the very beginning of promoting the application of high 12-channel carrier equipment, we organized efforts to test the radiation of high 12th and 12th carrier lines. The test results and their simple analysis are as follows. 1. Characteristics of the bright line radiation Due to the structural characteristics of the bright line, the signal transmission will produce radiation, which is characterized by: (1) Ming line line consists of two parallel wires, the system operates under impedance matching conditions, the carrier current line The wave way to the load, in the ideal case will not radiate to the air. Due to uneven wiring and impedance matching poor lead to a small amount of radiation