最新一代系统节电器的综合介绍——G4 Speed Uni Saver

本文较全面地介绍系统节电器，包括生产，趋势，污染后果，浪涌型式，性能，特点，原理，应用场合，参数，各代区别，第四代的优点，装置方式，功率确定，动能区别，系统框图，使用结论等。     

《量子电子学报》2006年（第23卷）总目次

.综述期页脉冲激光沉积法制备2 no基薄膜研究进展.…，.……，..................……，.，..…，董伟伟，陶汝华，方晓东1(l)晶格原子光学及其应用..…，....................................……，..................……浑星，印建平1(10)超强飞秒激光脉冲在空气中的传输研究(特约)...……张杰，郝作强，远晓辉，郑志远，张吉吉，俞进，鲁欣，奚婷婷，王兆华，仲佳勇，金展，刘运全，令维军，赵卫，魏志义3(282)纳米光子学综述...........……，......……，.............................................……，.余雷3(374)空芯光子晶…     

小型演播厅灯光,舞美的计算机辅助设计

小型电视台（站）由于人员，经费，设备，场地等限制，演播厅灯光，舞美因不同的演出和栏目需要，需经常调整或重新设计，布置，使用计算机进行辅助设计，可以在机上进行调整，修改，避免与实际操作发生时空交叉，冲突，影响演播厅的正常使用。     

价格战的博弈分析

企业之间竞争加剧，价格战时常发生，从将博弈的角度来分析，通过建立模型，最后可以得出唯一的纯策略纳什均衡解，即降价，当然，在竞争初期，通过价格战，竞争双方大大增加了用户从而提高市场占有率，但同时降低了ARPU，在注重利润的资本市场中，长期下去只会造成两败俱伤，然而，可以通过政府和市场相结合，对企业竞争行为进行规范，从而约束价格战。     

从大哥大到三哥三中国3G十年马拉松

近日，在全国信息产业工作会议上，信产部部长王旭东的讲话再次提到了对3G的看法，王旭东称，一，经过多年的努力，我国发展3G的条件已基本成熟；二，要继续做好TD-SCDMA规模网络技术应用试验，充分考虑电信网规模经济特点，遵循市场竞争规则，推动自主知识产权技术发展；三，优化市场竞争结构，优化网络资源配置；四，制订和完善相关的准入，业务，资费，监管，频率，建设管理等政策，确保3G发展平稳起步。 对此，知名电信专家，信产部通信科技委委员，北京邮电大学教授宋俊德提出了自己对中国3G的相关看法。[编者按]     

白衣秀士明基-西门子EF51

一袭白衫，不带一丝花哨，弹指之间，音乐信手拈来，将小喇叭塞入耳中，与喧闹的都市完全隔离，把思絮沉淀，再沉淀，直到波澜不惊，轻启唇齿，只需说出那个再熟悉不过的号码，让思念之人的话语在耳边响起，一切都那么轻松，那么简单。[编者按]     

激光治疗复发性口疮疗效观察

本文通过对３２例复发性口疮病人用氦氖激光治疗的观察与分析，由于光热效应改善了营养代谢，使炎性代谢产物排出，达到镇痛，消炎，消肿，粘膜上皮组织修复，上皮细胞再生的目的，从而加速了溃疡面的愈合。提出此方法具有操作简单，无副作用，无痛苦，疗程短，愈合快，病人易接受等优点，值得推广。     

碟报频传

机械公敌，刺激1995十周年(收藏版)，致命档案，证言，圣战风云，哈里波特3，金刚(1976)，幸福终点站，     

厦华LC-52R36

其造型轮廓鲜明，具有典型欧洲新锐风格，融合粗犷与精致，独具硬朗的金属美感魅力，表面选材精良，整体触感细腻圆润、和谐简洁，外观美观时尚，色彩真实自然、层次感鲜明，音响效果不错。夏普ASV液晶面板，全能微晶，超广域视角，双高频头，3D数字图像处理，运动补偿，景深扩展，速度调节，DCDI^TM专利图像处理，屏幕尺寸52英寸，16：9，     

野味是怎么炼成的

坚持是一种品德，坚持冒险，坚持挑战，坚持追求。然而变通是一种能力，变冒险为放松，变挑战为习惯，变追求为学习。有些技能需要我们慢慢掌握，例如适应极地之前先走到郊外，例如出发野营之前先享受野餐。五月，爱车，蓝天，草地，氧气，野味，我们一项不落，周密计划，完美演出，这便是DIY生活的最大乐趣所在。     

Normal-mode small-signal analysis of traveling-wave directionalcouplers

The small-signal frequency responses of the 1×2 and 2×2 directional coupler traveling-wave modulators are analyzed in closed forms including the effect of both the optical/microwave velocity mismatch and microwave loss. When the microwave loss is negligible, the small-signal bandwidths of 1×2 and 2×2 directional coupler traveling-wave modulators are 20 and 28%, respectively, larger than that of an interferometric modulator with the same electrode length. However, when the microwave loss is large, the 1×2 coupler has a larger bandwidth     

An integrated optic frequency translator for microwave lightwavesystems

A novel integrated optic component that performs a microwave frequency translation of an optical wave is presented. Its principle of operation and characteristics are derived from a perturbation analysis of the supermode propagation in a Y-fed directional coupler subjected to an electrooptic effect associated with a propagating microwave field. It is found that under appropriate values of the microwave field amplitude and interaction length, a very efficient conversion of optical power can be achieved. The optimum frequency shift of this transfer is controlled through the coupling length of the directional coupler. An approximate analytical solution of the coupled mode equations, which considers only the coupling between the two spectral components of the supermodes that are phase matched, has been performed     

微带分支线定向耦合器的小型化

基于尺寸原因定向耦合器在微波电路中的应用受到限制,采用接终端开路短截线的方法使四分之一波长的微带线变成T型结构,并进一步对短截线等效成为十字型微带线的方法,设计出小型化的定向耦合器。通过使用ADS软件进行仿真,设计的定向耦合器各项性能指标符合要求,面积为常规微带分支线定向耦合器的36%。     

一种新的广义阻抗变换器模型及应用

本文在微波网络综合理论中，提出一种新的广义阻抗变换器模型，它是Ｋ，Ｊ变换器的最一般推广，可应用于带任意复杂不连续性的微波滤波器，阻抗变换器和耦合器的设计，并能解决对称和反对称网络两种情况，文中给出了设计实例。     

一种双频微波功率合成器的设计与实现

一种新型的双频微波功率合成器，通过阶跃阻抗低通滤波器和平行耦合线带通滤波器构成的微带电路实现。该微波功率合成器实现了915MHz和2．5GHz两个非相干频率微波信号的功率合成。同时通过附加工作在915MHz和2．5GHz的20dB微带定向耦合器，就可以构建实验系统进行微波功率合成的测量。实验测量结果与数值模拟结果吻合，双频微波功率合成器和定向耦合器的性能达到了要求，可用于注入式微波器件效应的研究。     

Elliptic cavity couplers for traveling-wave tubes

The elliptic cavity coupler is described as a broad band low-loss coupler for microwave slow-wave structures. This type of coupler is particularly useful in helix-type traveling-wave tubes, but can be adapted for other slow-wave structures as well. Usable bandwidths as wide as 3 to 1 and broad-band insertion losses of less than 1 db have been observed. This type of coupler could readily be utilized with slow-wave structures in the millimeter wavelength region.     

Ka波段3dB定向耦合器的设计与仿真

定向耦合器广泛地用在现代微波系统中,文中介绍了两种应用在平衡式放大器中的3dB定向耦合器。首先对微带分支线耦合器与波导耦合器进行了理论分析,然后利用电磁仿真软件HFSS,对两种耦合器进行了建模仿真。仿真结果验证了这两种定向耦合器的可实现性,最后比较了两种耦合器的性能,并且总结了各自的特点。     

A cyclotron-wave rectifier for S-band and X-band

A device for converting microwave power into either dc power or low-frequency ac power has been investigated both theoretically and experimentally. Rotational energy is stored in an electron beam by a Cuccia coupler, then converted to longitudinal energy by interaction with a space-dependent dc magnetic field, and finally recovered as electric energy by a depressed collector. A simple kinematic analysis demonstrates that the Cuccia coupler can convert large amounts of microwave power into electron beam rotation. Limits on the electric field strength and asynchronism between signal frequency and cyclotron frequency are established for both classical and relativistic coupler operation. Efficiency analyses of the process of conversion from orbital energy to dc electric energy, both classical and relativistic, indicate that the efficiency exceeds 95 percent for a particular range of operating conditions. As an ac power supply, the device responds to the modulating frequency of the signal. Theory predicts near-negligible harmonic distortion as well as flatness of frequency response from dc to about 1.0 MHz modulating frequency. Four tubes and a prototype (with "artificial" coupler) were tested experimentally. The first three tubes exhibited efficiencies up to 22 percent, being hindered by reflection of electrons into the coupler. Certain design changes were tested on the prototype, where efficiencies from 36 percent to 75 percent were obtained. Incorporating these design changes into the fourth tube yielded measured efficiencies up to 34 percent, or when corrected to disregard unusually large cavity losses, up to 59 percent. Experimental tests of the tube as an ac converter yielded excellent frequency response and about 20 percent second-harmonic distortion. It is concluded that the theoretical foundation of efficiency predictions has thus far been based on too optimistic assumptions.     

一种高方向性弱耦合同轴耦合器的设计

从同轴定向耦合器的基本原理出发,提出了一种比较实用的高方向性弱耦合的同轴定向耦合器的模型。针对同轴定向耦合器端面的特性阻抗以及如何提高耦合器方向性或隔离度等问题进行了探讨。模拟与测试后的结果显示,此模型结构的同轴定向耦合器符合CDMA、W-CDMA和DCS等微波射频通信系统对于耦合度为35dB、隔离度大于65dB和驻波比小于1.05的同轴定向耦合器的指标要求。