泄漏电缆通常又称为泄漏感应电缆，是一种室外周界入侵探测系统，主要适用于银行、金库、高级住宅、监狱、仓库、博物馆、电站（包括核电站）、军事机关及设施、基地、油田、文物保护和其它需要室外周边防护的报警场所，也可作为室内各种防护报警使用。
由于3g信号频率高，在地铁中的泄漏电缆损耗和空间损耗将大大增加，为了达到覆盖要求，必然要引入中继放大。
Repeaters have to be employed in metros to meet the coverage requirements because leakage cables and free Spaces are much more spoiled due to high frequency of 3g signal.
分流电阻负载通常是由电缆泄漏电阻引起的，如图2 - 4所示。
Cable leakage resistance is a common source of shunt resistance loading, as shown in Figure 2-4.
然而，由于电缆泄漏电阻（RL）与RS并联，实际测量的电阻（RM）有所降低，如图2-34b的并联等效电路所示。
However, since the cable leakage resistance (RL) is in parallel with RS, the actual measured resistance (RM) is reduced, as shown in the parallel equivalent circuit of Figure 2-34b.
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