【技术】反射功率及反射测量指南
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本文中优译将为大家介绍反射功率及反射测量。
反射功率是设备输出到电容极板或电感线圈的所有功率的总和, 包括最终被负载吸收的有效功率和未被吸收的反射功率,通常记为Pr。
反射测量是网络测量的重要组成部分。对于射频信号,当两个连接器件的阻抗不同时就会发生反射。反射测量就是测量反射信号和入射信号间的比值关系。
网络分析仪用R接收机测量入射信号,用A接收机测量反射信号,因此反射测量经常表示为A与R的比值(A/R),我们可以用A和R接收机信号的幅度和相位信息完全量化表征被测件的反射特性。
在S参数术语中,S11表示被测件端口1(输入端口)的反射,S22表示被测件端口2(输出端口)的反射。进行反射测量的目的是确保射频能量有效的传输,如果能量被反射,就意味着有很少的能量被传输到希望到达的地方;另外,如果反射的能量太大,可能会烧毁器件,如输出功率放大器。
反射系数
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本文由ll转载自优译UIY.COM公众号,原文标题为:反射功率及反射测量,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
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