到现在为止，对于智能天线的研究仅限于窄带无线系统。
Up to now, research on smart antenna has been restricted to narrowband wireless systems.
主要是能承认这种形式的通讯是可能的，正如我们所熟悉的窄带无线电广播是可行的。
The main thing is to acknowledge that such a form of communication is possible, and just as practicable as our familiar narrow-band radio transmissions.
无线电台提供了与互联网协议为基础的系统无缝链接的互操作性和兼容性，并拥有扩展的无线电频率范围和窄带操作模式。
The radio offers seamless interoperability and compatibility with Internet Protocol-based systems and has an extended radio-frequency range and narrow-frequency bandwidth operating modes.
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