| 摘要 |
An intruder detection system includes: an intruder detection device; and a leaky transmission line pair including a transmission-side leaky transmission line, which is connected to the intruder detection device and through which an electric wave is output on the basis of an output from the intruder detection device, and a receiving-side leaky transmission line, which is connected to the intruder detection device and through which the electric wave output from the transmission-side leaky transmission line is received. Intrusion detection is performed by causing the intruder detection device to detect a variation of the electric wave received through the receiving-side leaky transmission line. A plurality of leaky transmission line pairs, which are connected to the intruder detection device and through which the electric wave is output and received, are provided to be spaced apart from each other.
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