射频场的力量在射频源最强，并随距离而迅速减弱。
The strength of RF fields is greatest at its source, and diminishes quickly with distance.
本文介绍了医用直线加速器射频源老化故障的诊断方法，并提供了三种应急措施。
This article introduces how to diagnose the ageing of medical lineal accelerator RF driver, and supply three emergency solutions.
为了使得射频源和波导管的频率保持一致，采用了自动频率控制系统(afc)。
In order to make the RF source and the waveguide have the same resonant frequency, the automatic frequency control (AFC) system is used.
为了使得射频源和波导管的频率保持一致 ，采用了自动频率控制系统 （AFC）。
This paper introduces an AFC algorithm for a zero-intermediate frequency direct-sequence spread spectrum digital receiver.
然而接下来，得把电子护照放在一个感应阅读器上，后者才能供给无源rfid射频能量电源，稍后，护照里的数据才能读出。
Next, however, the e-passport has to be placed over an inductive reader that provides the radio-frequency energy to power up the passive RFID so it can spit out its data.
频率合成器是射频收发机中非常重要的模块，是用于频率转换和频道选择的本地振荡源。
Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
本文对典型的干扰源—开关电源的传导发射频谱进行了分析，并介绍了降低传导干扰的设计方法。
Conducted spectrum of switched power sources, a typical interference source, is analyzed in this paper, and the design techniques have been introduced to minimize conducted interference.
此外，论文还讨论了射频频段电感、电容等无源器件集成的可能性以及方法。
Thirdly, the possibilities and methods to integrate the inductor and capacitor in the RF band are figured out in this paper.
这些误差源包括热电动势、由射频干扰(RFI)经过整流而产生的偏置量以及电压表输入电路中的偏置量。
These sources include thermoelectric EMFs, offsets generated by rectification of RFI (radio frequency interference), and offsets in the voltmeter input circuit.
最后，对各个模块电路以及完整无源射频标签电路进行了测试和分析。
In the end, measurements and results analysis on some modules and RFID transponder are introduced.
详细探讨无源射频识别系统的两种基本通信机制。
Also the two basic communication methods of passive RFID system are discussed.
真空室内的气体等离子体可由热灯丝或射频放电产生，4另外还配置了4个金属等离子体源、两套磁控溅射靶和冷却靶台。
The plasma can be 4 generated by hot-cathode discharge or RF discharge of gas. In addition, the device has four metal plasma sources, two magnetron sputtering targets, cold and hot target supports.
分析了前端部件中本振源相位噪声和混频器本振射频端口隔离度对系统探测性能的影响，指出在距离较近时影响明显。
The LO phase noise, LO-RF port isolation of the mixer in the front-end and their effect on the detectability of the radiometer were analyzed in this paper.
微波与射频频段通信系统中PIM干扰来自两种无源非线性：接触非线性和材料非线性。
PIM interferences at microwave and RF frequencies are mainly originated from two types of passive nonlinearities, namely, the contact non-linearity and material non-linearity.
这样，低功耗优化就成为无源射频识别标签设计中的一个核心问题。
Thus, it makes low-power optimization a kernel faced in RFID transponder design.
本文提出了一种面向ISO 18000 - 6c协议的无源超高频射频识别标签芯片设计。
This paper presents a new fully integrated wide-range UHF passive RFID tag chip design that is compatible with the ISO18000-6C protocol.
可控源时间域电磁法应用在海底探测，需要确定装置参数，通过实验和理论计算确定了发射频率的最大值；
For a sea-floor transient electromagnetic exploration system, its maximum transmitting frequency may be chosen as 200 Hz by supposing the sea-floor as horizontal thin conductive plates.
一种无源RFID系统是涉及射频识别领域，尤其是涉及一种无源RFID系统。
The invention relates to a passive RFID system, which relates to the field of radio frequency identification, in particular to the passive RFID system.
本文围绕射频集成电路中应用的无源硅基片上螺旋电感和有源器件砷化镓高电子迁移率晶体管进行了相关的研究，得到了一些新的结果和新的建模方法。
This paper focuses on the modeling of the passive silicon-chip spiral inductors and active GaAs HEMT, and obtains some new results and new modeling method.
本文围绕射频集成电路中应用的无源硅基片上螺旋电感和有源器件砷化镓高电子迁移率晶体管进行了相关的研究，得到了一些新的结果和新的建模方法。
This paper focuses on the modeling of the passive silicon-chip spiral inductors and active GaAs HEMT, and obtains some new results and new modeling method.
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