The levels of RF exposure from base stations and wireless networks are so low that the temperature increases are insignificant and do not affect human health.
基台和无线网络造成的射频接触水平很低，因此体温上升不显著，并且不影响人体健康。
From all evidence accumulated so far, no adverse short - or long-term health effects have been shown to occur from the RF signals produced by base stations.
迄今积累的所有证据都不能说明基台产生的射频信号会造成任何短期或长期的不良健康影响。
As the number of base stations and local wireless networks increases, so does the RF exposure of the population.
随着基台和无线局域网络的数量增多，人们的射频接触也在增多。
Arch test method is characterized with briefness, economy, it also can be validated by other methods, so, it is widely used in the measurement of RF absorbing materials.
由于拱形法简捷、经济，又可以用其他方法加以验证，所以在射频吸波材料测量中得到广泛的应用。
An RF power meter has one major drawback: it cannot measure frequency, so it may give an "approved" rating to a defective mobile telephone, as in the following two examples.
功率计的一个主要缺点是：不能测量频率，因此它会对一个有缺陷的手机给出“通过”，就像下面的两个例子。
The new devices have twice the RF bandwidth of LDMOS, so that one power amplifier (PA) can support multiple operating frequencies.
新的设备具有的LDMOS的射频带宽的两倍，这样，一个功率放大器（PA）的可支持多个工作频率。
The subcircuits consist of the low noise amplifier, RF filter, mixer, driver amplifier, image filter, power amplifier, transmit-receive switch and if filter and so on.
子电路包括低噪声放大器、射频滤波器、混频器、驱动放大器、功率放大器、中频滤波器等。
According to the measurement method, feeding a rf sinusoidal signal at location of interference source, so this signal is radiated by electrified railway system.
此方法从干扰源处——接触网与受电弓之间馈入高频信号，由电气化铁道系统辐射出去进行测量。
So the satellite communication system made stringent requirements for the RF front end of the transceiver.
所以，在卫星通信系统中，射频收发模块的性能指标有着严格的要求。
At the moment, most of RF chips and ultra high-speed circuits are based on technologies such as GaAs, Bipolar Si, BiCMOS and so on.
目前射频芯片和高速光纤通信芯片绝大多数都是采用高速双极性硅工艺和砷化镓工艺。
OBJECTIVE: to observe the histologic changes of ACL following reefing treatment, so as to investigate the optimal location to exercise RF reefing on.
目的：观察前交叉韧带不同部位进行射频紧缩后的组织学变化，以确定前交叉韧带射频紧缩的最佳部位。
RF technology is used in the systems communication with star topology structure, so it can manage greenhouses effectively.
系统采用无线rf技术，构成了点对多点的星形拓扑结构的通信网络，可对多个温室进行有效管理。
RF engineers achieve wireless front end so frequently by employing CMOS technology which has low cost and high yield.
射频设计工程师越来越多的利用低成本高产量的CMOS技术来实现无线前端。
Typical RF & uW instruments: signal generators, spectrum analyzers, network analyzers, power meters, receivers and so on;
典型的射频微波类测试仪表：信号源、频谱分析仪、网络分析仪、功率计、接收机等等；
So it's necessary to analyze the electromagnetic shielding of RF MEMS switches and MEMS systems, but no such document about it has been published.
因此，有必要对RFMEMS开关与MEMS系统进行电磁屏蔽分析，而目前还没有查阅到文献在这方面进行过研究。
The RF part of mobile phone has a lot of passive devices, so FEM becomes of a typical LTCC device.
由于手机射频前端部分含有大量无源元件，FEM成为利用LTCC的典型器件。
So there's a trend towards making the transceiver as digital as possible. This trend points to software-defined radio (SDR), which appears to be this decade's Holy Grail for the RF world.
这是个很难做的混合物，所以现在有趋势将收发器做的尽量数字化，这个趋势就是软件无线电(SDR)，它看上去是RF领域在这个年代的圣杯。
A diode or a 27mH rf choke going to ground provides the dc return so the detector will work. The rf choke does a better job, but they aren't always available. So the diode will work ok.
使用一个二极管或是27mHRF扼流圈接地可让检波单元正常工作，RF扼流圈表现更好，但不一定买得到，所以二极管好些。
So, we then developed a procedure for one of the most difficult instruments to calibrate, an RF test set, which USES 15 calibration standards.
因此，我们接下来针对一种最难校准的仪器开发了一个规程，即RF测试设备，它使用了15个校准标准。
So, we then developed a procedure for one of the most difficult instruments to calibrate, an RF test set, which USES 15 calibration standards.
因此，我们接下来针对一种最难校准的仪器开发了一个规程，即RF测试设备，它使用了15个校准标准。
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