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同轴电缆的屏蔽效率以转移阻抗和电容耦合阻抗这二项基本参数来表示。在某些情况下这些量是可以计算出来的,但一般来说需要有某种试验设备。一旦这些量定了,便产生一个困难的问题:屏蔽参数已知,人们怎样在给定的地点达到要求的幅射程度,或者相反,当处于已知场强时,在电缆内怎样达到要求的能量?本文叙述了用已知参数的电缆所作的一些实验,设法发现回答这个问题的合适技术。试验用校准了的天线,并在固定位置,改变频率和固定频率。改变位置这二种情况下进行。
The shielding efficiency of coaxial cable is expressed by two basic parameters of transfer resistance and capacitive coupling resistance. In some cases these quantities can be calculated, but in general some kind of test equipment is needed. Once these quantities are set, a difficult problem arises: the shielding parameters are known, how people reach the required level of radiation at a given location or, conversely, how the desired within the cable is at a known field strength Energy? This article describes some experiments with cables of known parameters and tries to find suitable techniques to answer this question. Test with a calibrated antenna, and in a fixed position, change the frequency and fixed frequency. Change the location of these two cases.