Out in the no-mans land of the international waters are the only means of communication with the submarines to use radio in the vlf or elf range.
在茫茫大洋深处，唯一可用的通信手段就是甚低频或者极低频无线电。
The range consists of three different types of regulation systems: a wireless system based on radio communication technology, a hard-wired system, and a self-acting system.
主要的三种标准的产品包括：基于无线控制技术的无线控制系统、线电缆系统以及自立式系统。
HF radio communication has a significant communication blind zone in the range of 200 kilometers usually. This disadvantage restricts its application in the near range tactical mobile communication.
短波无线电通信在200公里范围内通常存在着盲区，这一特点制约了其在近距机动通信中的应用。
In this paper, proposes and proves a new method of estimating communication range of tactical radio set through analyzing the results of experiments of the VRC-8000 radio station in suburb areas.
提出并论证了一种根据输入噪声估算战术电台通信距离的方法，并且以VRC—8000电台在城郊通信为例进行了具体的分析计算。
Their gear includes satellite communication systems, high-frequency radio, long-range optical equipment.
他们的装备包括卫星通信系统，高频电台，远距离。
Military Intelligence Battalion's gear includes satellite communication systems, high-frequency radio, long-range optical equipment.
美军陆军军事情报营的装备包括卫星通信系统、高频电台、远距离光学仪器。
Near Field Communication (NFC) is a new short-range radio frequency technology, which make two devices communicate easily and fast.
是一种新型的近距离无线通信技术，它使得移动设备的通讯更方便、快捷。
Research on long range radio wave propagation plays a significant role in both mobile communication and electromagnetic environment.
研究电磁波的长距离传播对移动通信和电磁环境研究都具有重要意义。
For example, both the EAS(Electronic Article Surveillance) system and the RFID(Radio Frequency Identification) system need high effective the short-range radio communication antenna.
例如，许多电子安检设备，如EAS（商品防窃检测）、RFID（射频识别）读写设备等，都要应用高效的近场通信天线。
For example, both the EAS(Electronic Article Surveillance) system and the RFID(Radio Frequency Identification) system need high effective the short-range radio communication antenna.
例如，许多电子安检设备，如EAS（商品防窃检测）、RFID（射频识别）读写设备等，都要应用高效的近场通信天线。
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