论文部分内容阅读
本文叙述了在300兆赫以上频带内测量射频同轴电缆屏蔽效率的方法.根据外导体稀松编织电缆所测得的结果,建议,除了用耦合阻抗表示射频电缆的屏蔽特性外,再引入“转移导纳”的概念。因为在3000兆赫以下的测试结果表明,这二个参数随频率成正比地增加,所以在某一频率(例如30兆赫)下的参数值,就足以表征屏蔽效率。
This paper describes the method of measuring the RF coaxial cable shielding efficiency in the frequency band above 300 MHz.According to the measured results of the outer conductor sparse braided cable, it is suggested that the coupling impedance be used to represent the shielding characteristics of the RF cable, Satisfied "concept. Since the test results below 3000 MHz show that these two parameters increase in proportion to frequency, the parameter values at a certain frequency (eg, 30 MHz) are sufficient to characterize the shielding efficiency.