摘要
本文通过实验验证了一种基于宽带混沌信号测量电介质传输线的断点和阻抗失配的方法.该方法利用光反馈半导体激光器产生的混沌信号作为探测信号,通过相关法对传输线进行断点定位、阻抗失配测量以及在线检测.实验结果表明,断点的定位偏差小于1%,阻抗的测量值在额定范围内,对于频率为2MHz的矩形脉冲信号的干扰容限为48dB.
We demonstrate experimentally a method to measure breakpoints and impedance mismatch for dielectric transmission lines by using broadband chaotic signals. Chaotic signal serving as a probe signal is obtained from the chaotic laser diode with optical feedback. Correlation method can realize breakpoint location, impedance estimation, and live test. Experimental results show that the location deviation is less than 1%, the impedance error is within the nominal rating, and interference margin is about 48 dB for 2 MHz square pulse signal on wire.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第9期142-147,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60777041),国家自然科学基金青年科学基金(批准号:60908014)
山西省青年科学基金(批准号:2009021003)资助的课题~~
关键词
混沌
故障定位
半导体激光器
时域反射法
chaos
fault location
semiconductor lasers
time domain reflectometr
