One of the museum exhibits is this underground magnet antenna from the Bita cryptographic hardware.

博物馆的展馆之一是来自于 Bita 加密硬件的地下磁铁天线。

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Introduced some new type underground mobile communication system, such as leakage communication system, distributed antenna communication and region mobile communication, etc.

介绍了多信道漏泄通信系统、分布天线通信系统和小区制移动通信系统等一些新型矿井移动通信系统。

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This part mainly includes the choice of signal source, antenna, network framework, and the allocation of logical cell, implements the effective network coverage of the underground tunnel.

该部分主要涉及信源、天线、组网方案的选择，以及逻辑小区的划分，实现对地下隧道的有效覆盖。

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