Ku波段宽带大功率多芯片合成设计

设计针对多个Ku波段宽带MMIC功率放大芯片进行大功率合成.对波导多路功率合成结构进行了分析,基于单个Ku波段6W功放单片,进行了16路的功率合成,研制出了工作在12～17 GHz,带宽达到6 GHz的固态功率放大器.通过测试发现该固态功率放大器的输出功率≥70 W,功率增益≥15 dB,工作电压48 V,效率≥16％...     

X波段功率单片放大器的研制

介绍了X波段功率单片放大器的设计、制造、测试等技术,以及器件的大信号模型的建立.X波段功率单片放大器采用两级放大,经过功率分配和功率合成,输入输出匹配为50 Ω,单片性能达到输出功率≥5W,附加效率≥33%,功率增益≥13.5dB,增益波动≤0.3dB,输入驻波比≤2?1.     

用于移动通信的砷化镓高频PHEMT小功率晶体管

砷化镓PHEMT功率器件具有工作频率高，输出功率密度大，效率高，功率增益高等特点，我们研制的0．5μm栅长GaAsPHEMT小功率晶体管，栅宽1mm，直流跨导250ms/mm，栅漏反向击穿电压大于13V，在20GHz下最大可用增益为8dB，X波段输出功率为0．8W／mm，可应用于22GHz以下的窄带功率放大器和18GHz以下的宽带功率放大器。     

X波段双级单片功率放大器

本文利用比较符合实际的MESFET器件物理模型,采用集总元件匹配网络设计了单级和双级的x波段单片功率放大器。单级放大器中心频率为10.0GHz,带宽1.3GHz,线性输出功率126mW时,增益为5.2dB。双级放大器中心频率为9.4GHz,带宽0.8GHz,输出功率P_0≥1 00mW,增益G_p≥7dB,带内增益平坦度⊿G_p≤±0.5dB。较好的样品在9.6GHz下输出功率P_0≥250mW,G_p为9.4dB。     

P波段脉冲调制激励放大组件

叙述一种Ｐ波段脉冲调制激励放大组件的设计方法及测试结果，采用微波单片集成电路和微波功率晶体管内匹配技术，制作出５４０～６１０ＭＨｚ下增益Ｇｐ≥３０ｄＢ、输出功率Ｐｏ≥５Ｗ±０．５ｄＢ的脉冲功率放大器。     

P波段脉冲调制激励放大组件

叙述一种Ｐ波段脉冲调制激励放大组件的设计方法及测试结果，采用微波单片集成电路和微波功率晶体管内匹配技术，制作出５４０－６１０ＭＨｚ下增益ＧＰ≥３０ｄＢ、输出功率ＰＯ≥５Ｗ±０．５ｄＢ的脉冲功率放大器。     

C波段立体微带电路GaAs FET功率放大器

利用一四一三所研制的微波功率砷化镓FET,研制了一种高增益的五级功率放大器,末级利用功率合成。在C波段,线性增益31dB,1dB增益压缩点输出功率为860mw。当输入信号为1mw时。中心频率输出为940mw,效率达10%左右。     

Ku波段单片功率放大器

南京电子器件研究所已研制成 Ku波段单片功率放大器 ,可应用于点对点通信、卫星通信等领域。功率放大器的主要参数如下 :工作频率 /GHz:1 4 .5～ 1 7.5输出功率 /d Bm:≥ 2 9.5增益 /d B:≥ 8输入电压驻波比 :≤ 2 .5∶ 1功率附加效率 :30 %Ku波段单片功率放大器     

6.5-9GHz宽带GaAs FET功率放大器单片集成电路

<正>南京电子器件研究所已研制成X波段两级GaAs FET功率放大器单片集成电路.3dB带宽为6.5-9GHz.7.8GHz下,小信号增益8.5dB;1dB压缩输出功率70mW;4.5dB增益水平下输出功率140mW.芯片直流参数合格率较高.芯片尺寸为1.6×1mm.     

4 W GaAs X/Ku波段单片功率放大器

采用GaAs离子注入工艺，研制了GaAsX／Ku波段单片功率放大器。放大器末级栅宽76mm，频率9—13GHz，增益大于9．5dB，输出功率3W（f＝11GHz时达4W），效率≥22％（11GHz时达30％）。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks