超高频

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。

Driven by the enormous market of UHF RFID , the research and development for Reader and Tag have grows explosively.

超高频射频识别的巨大市场潜力推动了阅读器和标签的研究和开发。

This article introduces the design and operation principle of 713.5～718MHzultrahigh frequency digital phaselock FM frequency synthesizer.

本文对7135～718MHz的超高频数字式锁相调频频率合成器的组成、设计原理进行了介绍。

Features: Near-field RFID operation to enable reading of Item Level Tags Work with UHF Gen2 RFID tags that incorporate an inductive near-field component including the Button, Paperclip and Satellite tags High performance, low cost antenna solution Table top or table bottom mounting Specifications: Information in this specification is subject to change without further notice The CS-777 near-field reader antenna is a key enabling technology for UHF Gen2 Item-Level Tagging systems.

它可用于零售和制药应用，图书馆系统，文件控制，检查柜台和许多其他应用程序需要一个短距离和密集读取范围的限制的关建技术应用。近场的RFID运作，使项目级标记阅读超高频二代RFID标签的工作融合了归纳近场组成，其中包括高性能，低成本的天线解决方案表顶部或底部安装表规格：使技术UHF第二代产品级别标记系统。

In this system, employing the method of sensor directly measuring the tire pressure, the pressure value is send out wirelessly according to the given UHF after coded and modulated, finally the pressure information is displayed on the displaying instrument of the flight deck.

该系统采用传感器直接测量轮胎压力的方法，将压力信息编码调制，以设定的超高频用无线的形式发送出去，压力信息最终显示在驾驶舱显示仪表上。

Due to varying in working object and medium, the delivered mode and mechanism of vibration energy of super-frequency hydraulic vibrator is different.

本文系统的综述了国内外高频液压振动器的的现状和发展趋势，通过对几种液压振动器和液压调频器的方案分析，构思设计了回转调频器式超高频液压振动器。

Autopilot tailored to deck operations and hover, twin-gyro platform and Doppler, duplicated HF, VHF, UHF, night lighting plus strobe, radio compass, radar altimeter, IFF and four passive RWRs.

自动驾驶仪适合甲板作业和悬停，双陀螺平台和多普勒，重复高频，甚高频，超高频，加上夜间灯光频闪，无线电罗盘，雷达高度表，森林论坛和4个被动

As the significant importance of source location to power cable,widely used location methods including time domain reflectometry and improved techniques,are presented on the basis of transmission line model.

根据检测原理及选用传感器的不同，目前电缆局部放电的检测方法大致有声发射法、电容耦合法、电感耦合法、超高频法和方向耦合法等。

By Mark Roberti June 21, 2004—Companies that manufacture products that are made of—or packaged in—materials that are not "RF friendly" are concerned about how they are going to meet mandates from retailers.

众所周知，超高频（868-956MHz）的电磁波容易被水吸收，在金属表面会反弹，无线射频能量会被碳纤维甚至用于微波炉加热的包装材料吸收。

The ultra high frequency RFID technology of this system is more advanced than other technologies from the aspect of operation and veracity.

此系统所采用的超高频RFID技术，从操作上和准确性上来讲，都较其它技术大为提高。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。