射频源

Then, on the basis of the functional verification, the system architectures of the radio frequency analog front end and the control logic circuit for the passive UHF RFID transponder are studied and designed with low-power design techniques. The RF AFE circuit includes rectifier, matching network, backscatter, regulator, AM demodulator, voltage reference, local oscillator and power on reset circuit, and so on. The control logic circuit contains clock synchronization module, decoding module, coding module, cyclic redundancy checksum module, power management unit, control unit, shift register and memory.

然后，在功能验证的基础上，重点研究了无源超高频射频识别标签芯片射频模拟前端电路和控制逻辑电路的系统架构，并采用低功耗设计技术对其进行了设计，射频模拟前端电路设计包括了整流器、匹配网络、反向散射电路、稳压器、AM解调器、电压参考源、本地振荡器以及上电复位电路等，控制逻辑电路设计包括了时钟同步模块、解码模块、编码模块、CRC校验模块、功率管理单元、控制单元、移位寄存器和存储器等。

This thesis described the etching characteristics of silicon nitride passivation films in the thin-film transistor structure using an enhanced capacitive-coupled high-density plasma etcher. The main parameters used in these experiments were RF source power, RF bias power, chamber pressure, SF6, O2 and He gas flow rates.

中文摘要本研究以加强型电容耦合式高密度电浆蚀刻机台来研究蚀刻氮化矽结构，实验操作参数为射频电浆源功率、射频偏压源功率、SF6、O2、He气体流量和腔体压力。

The source of pain can be treated with medial branch radiofrequency neurotomy and initial injection of local anaesthetic either into the facet joint or the medial branch can be used to demonstrate that the source of pain is treatable with RF lesions.

我们可以通过内侧支射频损毁治疗该痛源。此前，用局麻药进行小关节内注射或内侧支神经阻滞，其结果可以提示我们该痛源是否适合采用射频损毁治疗。

We have researched RF ion source in space science and application research center Chinese academy of science and excogitated broad beam radio frequency ion source.

本文是在中国科学院空间科学与应用中心开展了射频离子源的研究工作，研制和开发出射频宽束离子源。

We are also distributor of the following companies:Pfeiffer Vacuum-turbo molecular pump, other types of pumps, gauges, Helium leak detector, mass spectrometer; Maxtek, Inc-Quartz crystal thin film deposition controller and sensors; Telemark Inc-E-beam source and power supply, optical thin film monitor; Comdel, Inc-DC and RF power supply; Angstrom Sciences-Magnetron target and materials; Oxford Scientific Limited-Atom sources; Plasma Quest Ltd-Plasma systems for coating and etching; Sentech Instruments GmbH-Ellipsometers.

我们代理的产品包括德国普发真空的全线真空产品(分子泵等各种真空泵，真空计，检漏仪，质谱仪，各种真空零部件)；美国美泰克公司的石英晶体膜厚监测仪，传感器；美国泰利玛科公司的电子枪和光学膜厚控制仪等；美国康戴尔公司的射频，中频和直流电源；英国牛津科学公司的微波等离子体源，电子束蒸发源，原子源，高能电子衍射枪；英国PQL公司等离子体溅射镀膜设备，美国安斯超科学公司的磁控溅射阴极及溅射靶材，德国森泰科仪器公司的椭偏膜厚测量仪和等离子刻蚀沉积设备等。

An RF ion source suitable for low power operation over a range of pressures in air which comprises discharge electrode, a cathode and an anode, the cathode being connected to an rf signal supply through an associated coupling means and the anode adapted to provide a surface area over which a plasma discharge may occur no greater than substantially that of the cathodal area over which the discharge may occur.

在空气压力范围内适合低功率工作的射频离子源，该离子源包含放电电极，一个阴极和一个阳极，该阴极通过相关的连接装置连接到射频信号源，调节该阳极以提供等离子放电可能发生的表面区域，该区域不大于放电可能发生的阴极区域。

To improve the stability and the depth of the pseudo-potential well of the ion trap, two sets of RF sources and the corresponding detection circuits were designed and implemented in a Paul trap.

为了满足离子囚禁稳定性以及提高离子囚禁势阱深度，设计和制作出两套囚禁离子的射频源和射频共振吸收检测电路。

To improve the stability and the depth of the pseudo-potential well of the ion trap, two sets of RF sources and the corresponding detection circuits were designed and implemented in a Paul trap. With the implementation, absorbed signals of 199Hg(superscript +) and N(superscript + subscript 2) were detected from trapped ions.

为了满足离子囚禁稳定性以及提高离子囚禁势阱深度，设计和制作出两套囚禁离子的射频源和射频共振吸收检测电路，利用不同频率的射频源及相应检测电路在双曲线型离子阱实验装置中成功地囚禁了199Hg和N(上标+下标 2)离子得到了它们的射频共振吸收信号。

Our company's productline was developed from microwave ferrite devices to all of the RF passive components, Product suite includes diplexers, filters, Combiner, Splitter, coupling devices, isolator, circulator and POI frequency devices.

公司的产品也从单纯的微波铁氧体器件发展到几乎涵盖所有的射频无源器件。产品包括双工器，滤波器，合路器，功分器，藕合器，隔离器，环行器及POI等射频无源器件和组件

RF modules covering GSM, CDMA, TD-SCDMA, WCDMA, WLAN and Wimax wireless communications systems, active modules include power and frequency of the linear power amplifier, transceiver components, modules and integration of selected frequency modules, Passive radio frequency modules, including various types of filters, diplexers, a road, splitters and couplers; wireless network optimization campaign整机including PHS, GSM, CDMA, TD-SCDMA and WCDMA straight-machine, RF Rafah Yuan and indoor distribution systems, digital television, including digital TV mobile wireless transceiver modules, wireless transponders, digital mobile TV repeater, and so on.

射频模块涵盖了GSM、CDMA、TD-SCDMA、WCDMA、WLAN和Wimax等无线通信系统，有源模块包括各种功率和频率的线性功率放大器、收发组件、选频模块和一体化模块等，无源射频模块包括各类滤波器、双工器、合路器、功分器和耦合器等；无线网络优化系列整机包括PHS、GSM、CDMA、TD-SCDMA和WCDMA直放机、射频拉远和室内分布系统等；数字移动电视包括数字电视无线收发模块、无线转发器、数字移动电视直放站等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。