查询词典 RF

Since filters and impedances are very important components in RF system,thinking of combining both be a great idea.

此论文的产生是由於滤波器和阻抗匹配在微波电路系统中皆是相当重要而且不可或缺，因此将完成不同阻抗的滤波器，已可以达到匹配的效果还可以做滤波的功能。

A circle is placed at the launch point to improve the interaction between the electron beam and the fields supported by the slow wave structure, thus to control the beam current density at the launch point, and to minimize the loss of the electron beam energy. The inaner radii of the extractor vanes are slightly larger than those of other SWS vanes, which increases the axial group velocity and enhances the microwave output power and efficiency. Implementation of two RF choke vanes stops the leakage of microwave pulse power toward the diode, and makes the device more compact than the conventional MILO.

该振荡器在阴极电子发射起点加圆环，控制此处电子束的发射密度，来减少电子能量的损耗，改善束－波互作用；逐渐加大慢波结构的后两个叶片的内半径，增大微波群速度，便于谐振腔中的能量输出，提高微波输出效率；采用两个扼流片有效地阻止了微波功率向二极管区泄漏，相应减小了器件的尺寸。

In this thesis, we will focus on the research illustration and design comparison on combing several different CMOS active inductor with negative conductance generator applied in RF amplifier on different operating frequency. And we will apply various loss compensation techniques on several different active inductors to improve the characteristics of the inductors.

在本论文中，我们首先针对各种不同的CMOS主动式电感器与负电导产生器的组合应用於不同工作频率的射频放大器设计研究，并且对各种不同的主动式电感器使用不同的损失补偿技术来改进此电感器特性的设计。

Key words thin-layer pH-chromatography;ionization constant;organic acid

如果当固定相的［H+］＞＞Ka时，则Ka/［H+］可忽略，这样即可得到Rf值的极限值

This thesis describes the design of key RF block in the UWB transceiver- the power amplifier.

这篇论文是关於设计射频区块中的重要元件―功率放大器的设计。

The key system related technologies were introduced. Based on the analysis of some possible technical approaches as well as the selectable key chips, a systematic scheme for the LACS was presented which consists of electronic locks, Mifare 1 S50 series non-contact IC cards, MF RC522 RF based card-reading/writing module, controlling unit using MSP430 as MCU, communication network, and the background DBMS.

在主要技术路线和关键器件论证的基础上，提出了一个主要由电子门锁、Mifare 1 S50系列IC非接触式智能卡、MF RC522为射频读写芯片的读卡模块、MCUMSP430为控制核心的门禁控制模块、通信网络、后台发卡单元和相应的DBMS子系统等组成的系统设计方案。

The printed UWB antenna is comprised of a planar monopole radiator and the ground plane which are connected to a coaxial cable to launch RF signals. This kind of ground and antenna system is essentially an unbalanced design, where electric currents are distributed on both radiator and ground plane, and then leakage to the outer conductor of the feeding cable. The impedance matching and radiation pattern will be influenced in the low band, which are our focus. Finally, some techniques will be proposed to reduce the cable effect on the antenna performance.

进行超宽频天线量测时，吾人会利用同轴缆线连接到网路分析仪，这时的同轴缆线不只是扮演一个传输讯号的工具而已，由於单极天线的不平衡结构，对低频而言，接地回流电流会泄漏到同轴接地的导体外部，造成同轴缆线也是一个辐射体，影响到天线低频时的阻抗匹配与辐射特性，因此本论文将探讨同轴缆线对於天线一些参数的影响，并研究提出解决的办法。

The variable high-power directional coupler could be used in the high power RF systems for linacs and the other devices.

它具有调整范围宽，承受功率高，真空性能好的优点。可用于电子直线加速器和其它高功率微波设备中。

In this pilot study, 21 breast cancers in 20 patients underwent RF ablation immediately before surgical lumpectomy or mastectomy. There were no adverse effects.

在此研究中，共有21个乳房肿瘤在接受乳房切除手术前，进行无线电切除治疗，完全没有副作用产生。

A relaxed Ralph Fiennes, in true luvvie style, hugged, air-kissed or kissed half the people he met inside the vast hall where an audience of over 6,000 people awaited the verdicts that would transform the fortunes of the winning shows.

重点：说偶棉RF内天相当之热情，在内能容纳6000观众的大厅里，逮谁都要抱抱，亲亲（怀疑记者夸大其辞，看现场照片只不过抱了几个，亲了一个麻

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。