这些无线电系统之间就像光波与声波一样彼此区别，比如，人造卫星就无法追踪射频识别标签。
These radio systems are as different from each other as light is from sound, so satellites cannot track RFID tags, for instance.
在现代无线通信系统中，对发射信号进行直接射频调制已成为射频无线电的发展趋势。
In modern wireless communication system, the direct RF-modulation for transmitting signal is a new developing trend of RF radio.
在双路无线电系统或天线系统中，发射的总射频功率是关键参数，功率计就是一个非常好的解决方法。
When total RF power transmitted is the key parameter-in a two-way radio system or an antenna system, for example-an RF power meter is an excellent solution.
这一系统利用射频无线电对记录媒体进行读写操作，完成对马拉松运动员的非接触式自动识别，从而实现运动员成绩计时。
Through identifying no touched automatically the Marathon runner, the timekeeping record of the runner was obtained by utilizing radio frequency to read and write recording medium.
单个天线的工作频带覆盖了例如由无线电系统所使用的频率范围或者只是该频率范围内的发射频带或接收频带。
The operating band of an individual antenna covers e. g. the frequency range used by a radio system or only the transmitting or receiving band in that range.
其次，在对射频识别系统的协议和无线电频谱规范进行分析的基础上，确定了阅读器射频前端的体系架构。
Secondly, the architecture of reader front end is determined based on the analysis of RFID protocols and wireless frequency regulations.
描述：PC透明材料制成，适用于无线电射频电磁，声磁系统。
Description: made of PC transparent material; used in em, RF and AM system.
鉴于此，对TD - SCDMA分布式基站的优势和系统设计作了描述，并对基于软件无线电技术的分布式基站射频拉远单元的设计结构和数据的速率做了重点论述。
The advantages and system design of the distributed base station is discussed in this paper. The structure design and RRU rate in RRU based on the software radio technology are emphasized.
鉴于此，对TD - SCDMA分布式基站的优势和系统设计作了描述，并对基于软件无线电技术的分布式基站射频拉远单元的设计结构和数据的速率做了重点论述。
The advantages and system design of the distributed base station is discussed in this paper. The structure design and RRU rate in RRU based on the software radio technology are emphasized.
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