During a seven-day auction on eBay that ended on May 29, Novocin says he sold four items, including an X-Band Weather Radar Modulator for and a high-frequency radio circuit card for .
最后，经过七天的竞价，诺沃辛卖出了四件零件，包括以500美元的售价卖出一个雷达调节器和以32美元卖出一个高频无线电电路板。
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.
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。
Short wave is radio frequency band earliest utilized by human being, and short wave communication is one modern communication method with a long history.
短波是人类最早开发利用的无线电频段，短波通信是历史最为悠久的现代通信手段之一。
Radio Frequency Interference (RFI) plays an important role on the quality of Ultra-Wide Band Synthetic Aperture Radar (UWB-SAR) imaging.
有效的射频干扰(RFI)抑制技术是超宽带合成孔径雷达(uwb - SAR)成像质量的重要保证。
Under normal circumstances, in order to filter at any frequency band have good frequency resolution, can be used with a broadband constant-pass filter, such as radio frequency-selective.
一般情况下，为使滤波器在任意频段都有良好的频率分辨力，可采用恒带宽带通滤波器，如收音机的选频。
In the platform, the short wave signal is digitalized in the radio frequency band and converted into the analytical baseband signal.
在这个平台上对短波信号射频数字化，然后进行数字变频，获得宽带基带解析信号。
A radio frequency band or cable segment providing a single path for transmitting electrical signals.
供单一线路传播电子信号的一段广播频率或部份电缆。
The system adopts superheterodyne architecture. It consists of intermediate frequency (IF) band and radio frequency (RF) band hardware design.
该收发信机采用超外差结构，主要包括中频部分的硬件设计以及射频部分的硬件设计。
The band width of the radio-frequency signal for the spread spectrum communication can be spreaded to several times or even thousands of times the band width of the information signal.
扩频通信的射频信号频带宽度，可扩展到信息信号频带宽度的数倍乃至数千倍。
In one exemplary embodiment, the multi-band antenna system 100 is tuned to operate within two general radio frequency ranges which are generally referred to as a low band and a high band.
在一个例示的实施例中，多波段天线系统100被调谐为在两个通常的射频范围内操作，这两个通常的射频范围通常称作低波段及高波段。
The transmission performance of the MSK modulator is very superior in a frequency band limiting and power-limiting radio channel.
MSK调制在限频带、限功率的无线信道中传输性能尤为优越。
In this paper, taking L-band as the core, a design Compatible Multi-band Up-converter for radio frequency is introduced, and the real circuit is accomplished and tested.
以L波段为主，论述和设计了兼容多波段上变频器，并且完成了实际电路的制作与调试。
The technique of electromagnetic waves in SLF (Super Low Frequency) frequency band can be investigated in the light of geophysical theory combined with radio-physical theory.
超低频 （SLF）电磁波技术利用地球物理和无线电物理相结合的原理 ，由人工产生大功率电磁波信号。
The technique of electromagnetic waves in SLF (Super Low Frequency) frequency band can be investigated in the light of geophysical theory combined with radio-physical theory.
超低频 （SLF）电磁波技术利用地球物理和无线电物理相结合的原理 ，由人工产生大功率电磁波信号。
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