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首页> 外文会议>Proceedings of the International Wire amp; Cable Symposium (IWCS~TM), Inc. >Insertion Loss in Coaxial Transmission Lines from Impedance Mismatches
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Insertion Loss in Coaxial Transmission Lines from Impedance Mismatches

机译：阻抗不匹配导致同轴传输线的插入损耗

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摘要

The objective of this paper is to provide CATV cable professionals with an uncomplicated understanding of the relationship between impedance variations and signal loss in coaxial cable transmission lines. Impedance discontinuities whether quantified as a change in impedance in Ohms, reflection coefficient, return loss or voltage standing wave ratio (VSWR), have an effect resulting in loss to a propagating signal. This loss is known as reflection loss. CATV networks use low power compared to 50 Ohm transmission line systems and for this reason this paper only focuses on the signal loss characteristic and not reflected power. A basic and useful understanding of the relationship between impedance change and signal loss and a technique to quantify the corresponding amount of signal loss in dB (decibel) will help cable professionals better understand and predict cable system performance. Data from laboratory testing to support the theoretical principles of signal loss from impedance change is included in this paper. Since signal loss is often described as attenuation or insertion loss, these terms will be defined and must be understood to enable comprehension of this topic.
机译：本文的目的是为有线电视电缆专业人士提供对同轴电缆传输线中阻抗变化与信号损耗之间关系的简单理解。阻抗不连续性，无论是量化为以欧姆为单位的阻抗变化，反射系数，回波损耗还是电压驻波比（VSWR），都会导致传播信号的损耗。这种损耗称为反射损耗。与50欧姆传输线系统相比，CATV网络使用的功率较低，因此，本文仅关注信号损耗特性，而不关注反射功率。对阻抗变化和信号损耗之间关系的基本和有用的理解，以及一种量化相应信号损耗（以dB为单位）的技术，将有助于电缆专业人员更好地理解和预测电缆系统的性能。本文包含了来自实验室测试的数据，以支持阻抗变化引起的信号损失的理论原理。由于信号损耗通常被描述为衰减或插入损耗，因此将定义这些术语，并且必须将其理解为能够理解该主题。

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