Scan blindness phenomenon in conformal finite phased arrays of printed dipoles

Scan blindness phenomenon for finite phased arrays of printed dipoles on material coated, electrically large circular cylinders is investigated. Effects on the scan blindness mechanism of several array and supporting structure parameters, including curvature effects, are observed and discussed. A full-wave solution, based on a hybrid method of moments/Green's function technique in the spatial domain, is used to achieve the aforementioned goals. Numerical results show that the curvature affects the surface waves and hence the mutual coupling between array elements. As a result, the array current distribution of arrays mounted on coated cylinders are considerably different compared to similar arrays on planar platforms. Therefore, finite phased arrays of printed dipoles on coated cylinders show different behavior in terms of scan blindness phenomenon compared to their planar counterparts. Furthermore, this phenomenon is completely different for axially and circumferentially oriented printed dipoles on coated cylinders suggesting that particular element types might be important for cylindrical arrays.     

现象级网综“火星情报局”的传播学分析

点击率作为网络综艺节目是否成功的唯一标准,"火星情报局"以8.4亿的总点击量创造了网综的新历史。因此,笔者将"火星情报局"作为样本,从传播过程5要素对该节目进行分析,以内容分析法为主,总结出网综成功必备要素及新的发展方向。     

42"PDP平板显示器扫描驱动IC及其生产工艺的实现

在自主研发国内BCD高压工艺的同时,设计并实现了一款用于42"数字电视PDP平板显示屏的扫描驱动芯片.该芯片及其制作工艺不仅实现了Bipolar,CMOS和高压功率DMOS器件的良好兼容(BCD工艺),而且采用工艺与电路设计互相匹配的交互方式完成了高低电平位移电路和高压输出驱动电路及其器件的设计,有效提高了芯片的性能,减小了芯片的面积.测试结果表明该芯片功能正常,性能良好,各项技术参数基本达到国外同类产品指标.在低压5V和高压160V的情况下工作,完全满足42"PDP显示系统的需求.     

42"PDP平板显示器扫描驱动IC及其生产工艺的实现

在自主研发国内BCD高压工艺的同时,设计并实现了一款用于42"数字电视PDP平板显示屏的扫描驱动芯片.该芯片及其制作工艺不仅实现了Bipolar,CMOS和高压功率DMOS器件的良好兼容(BCD工艺),而且采用工艺与电路设计互相匹配的交互方式完成了高低电平位移电路和高压输出驱动电路及其器件的设计,有效提高了芯片的性能,减小了芯片的面积.测试结果表明该芯片功能正常,性能良好,各项技术参数基本达到国外同类产品指标.在低压5V和高压160V的情况下工作,完全满足42"PDP显示系统的需求.     

扫描测试和扫描链的构造

本文首先论述了扫描设计与测试向量自动生成（ATPG）这种测试方法的关键技术，并由此为依据，提出部分扫描设计中，扫描链构造的分层次的三个选取原则。     

Low-Power Scan Testing: A Scan Chain Partitioning and Scan Hold Based Technique

Power consumption during scan testing operations can be significantly higher than that expected in the normal functional mode of operation in the field. This may affect the reliability of the circuit under test (CUT) and/or invalidate the testing process increasing yield loss. In this paper, a scan chain partitioning technique and a scan hold mechanism are combined for low power scan operation. Substantial power reductions can be achieved, without any impact on the test application time or the fault coverage and without the need to use scan cell reordering or clock and data gating techniques. Furthermore, the proposed design solution for scan power alleviation, permits the efficient exploitation of X-filling techniques for capture power reduction or the use of extreme (power independent) compression techniques for test data volume reduction.     

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全国手机短信收入前8月超190亿元；中电信借互联星空试水3G盈利模式；可可西里科考通信保障就绪；联想携五巨头建立创新中心[编者按]     

42"PDP平板显示器扫描驱动IC及其生产工艺的实现

在自主研发国内BCD高压工艺的同时,设计并实现了一款用于42″数字电视PDP平板显示屏的扫描驱动芯片.该芯片及其制作工艺不仅实现了Bipolar,CMOS和高压功率DMOS器件的良好兼容（BCD工艺）,而且采用工艺与电路设计互相匹配的交互方式完成了高低电平位移电路和高压输出驱动电路及其器件的设计,有效提高了芯片的性能,减小了芯片的面积.测试结果表明该芯片功能正常,性能良好,各项技术参数基本达到国外同类产品指标.在低压5V和高压160V的情况下工作,完全满足42″PDP显示系统的需求.     

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行业信息 2005无线技术盛会在京举行 第五届中国无线技术大会暨展览会 于日前在北京隆重举行。本次大会是由信 息产业部无线电管理局主办，人民邮电报 社及信息产业部电信研究院组织，大会旨 在探讨推动行业发展的无线技术在软件、 硬件、市场趋势、服务和未来的发展方向。 信息产业部无线电管理局局长张胜利、副 局长谢远生分别为大会致开幕词和开幕 主题发言。