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Electrical Design of Advanced Packaging and systems Symposium, EDAPS

作者： Y.-L. Lu H.-R. Cui X.-W. Sun M. Xu Y.-Z. Yin Department of Information Science and Electronic Engineering University of Zhejiang Hangzhou China Hangzhou RFID Research Center Chinese Academy of Sciences Hangzhou Zhejiang China Key Laboratory of Terahertz Solid-state Technology Shanghai Institute of Micro-system and Information Technology Chinese Academy of Sciences Shanghai China Key Laboratory of Terahertz Solid-state Technology Shanghai Institute of Micro-system and Information Technology Chinese Academy of Sciences Hangzhou Zhejiang China Hangzhou RFID Research Center Chinese Academy of Sciences Hangzhou Zhejiang 310011 China Science and Technology on Antenna and Microwave Laboratory Xidian University Xi'an Shanxi China

A simple UHF RFID circularly-polarized reader antenna is presented in this paper. Air-substrate patch antenna is used to design. Truncated patch structure and shorted posts are used to obtain circularly-polarized characteristic. Measured results show that the antenna with size of 254*254*18 mm, has an impedance bandwidth of 880-960 MHz for voltage standing wave ratio (VSWR) less than 1.5. Moreover, axial ratio (AR) with bandwidth of 906-928 MHz is under 3dB. A good agreement is achieved between simulated and measured results. The antenna is a good choice for UHF RFID applications.

关键词： Radiofrequency identification Antenna measurements UHF antennas Bandwidth UHF measurements Patch antennas

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A monolithic 3.1-4.8 GHz MB-OFDM UWB transceiver in 0.18-μm CMOS

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Journal of Semiconductors 2010年第6期31卷 109-117页

作者：郑仁亮江旭东姚望杨光尹江伟郑剑钦任俊彦李巍李宁 State Key Laboratory of ASIC and System Fudan University Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University

A monolithic RF transceiver for an MB-OFDM UWB system in 3.1-4.8 GHz is *** transceiver adopts direct-conversion architecture and integrates all building blocks including a gain controllable wideband LNA,a I/Q merged quadrature mixer,a fifth-order Gm-C bi-quad Chebyshev LPF/VGA,a fast-settling frequency synthesizer with a poly-phase filter,a linear broadband up-conversion quadrature modulator,an active D2S converter and a variablegain power *** ESD protected transceiver is fabricated in Jazz Semiconductor＇s 0.18-μm RF CMOS with an area of 6.1 mm^2 and draws a total current of 221 mAfrom 1.8-V *** receiver achieves a maximum voltage gain of 68 dB with a control range of 42 dB in 6 dB/step,noise figures of 5.5-8.8 dB for three sub-bands,and an inband /out-band IIP_3 better than-4 dBm/＋9 *** transmitter achieves an output power ranging from-10.7 to-3 dBm with gain control,an output P_（1dB） better than-7.7 dBm,a sideband rejection about 32.4 dBc,and LO suppression of 31.1 *** hopping time among sub-bands is less than 2.05 ns.

关键词： MB-OFDM UWB transceiver receiver transmitter synthesizer

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Pressure-induced topological insulating behavior in the ternary chalcogenide Ge2Sb2Te5

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Physical Review B 2011年第8期84卷 085130-085130页

作者： Baisheng Sa Jian Zhou Zhitang Song Zhimei Sun Rajeev Ahuja Department of Materials Science and Engineering College of Materials Xiamen University China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro-System and Information Technology CAS China Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry (Xiamen University) China Department of Physics and Astronomy Uppsala University Sweden

We unraveled the pressure-induced topological insulating behavior in Ge2Sb2Te5 (GST) by means of ab initio calculations. We have shown that the spin-orbit interaction separates the twofold degenerate Ge pxpy Sb pxpy Te pxpy state to an upper and a lower level and enhances the energy level of Ge s Sb s Te pz/Ge pz Sb pz Te s states. Consequently, the sign of parity changes by inversing the characterizations of conduction band minimum and valence band maximum in a certain range of pressures. Moreover, the surface band structure with the Dirac cone feature was observed. The present results suggest that GST-related materials are a new family of pressure-induced topological insulators.

关键词： CHALCOGENIDES SEMICONDUCTORS SPINTRONICS DENSITY functionals CONDUCTION electrons

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A low-spurious fast-hopping MB-OFDM UWB synthesizer

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Journal of Semiconductors 2010年第6期31卷 88-92页

作者：陈丹凤李巍李宁任俊彦 State Key Laboratory of ASIC & System Fudan University Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University

A frequency synthesizer for the ultra-wide band（UWB） group #1 is *** synthesizer uses a phaselocked loop（PLL） and single-sideband（SSB） mixers to generate the three center frequencies of the first band group by mixing 4224 MHz with±264 MHz and 792 MHz,respectively.A novel multi-QSSB mixer is designed to combine the function of frequency selection and frequency conversion for low power and high *** synthesizer is fabricated in Jazz 0.18-μm RF CMOS *** measured reference spur is as low as-69 dBc and the maximum spur is the LO leakage of-32 dBc.A low phase noise of—110 dBc/Hz @ 1 MHz offset and an integrated phase noise of 1.86°are *** hopping time between different bands is less than 1.8 *** synthesizer consumes 30 mA from a 1.8V supply.

关键词： frequency synthesizer SSB mixer VCO PLL

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Label-free DNA detection based on silicon nanowires

Label-free DNA detection based on silicon nanowires

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International Conference on Solid State Sensors and Actuators (TRANSDUCERS)

作者： A.R. Gao N. Lu X.L. Gao P.F. Dai T. Li Y.B. Gong C.H. Fan Y.L. Wang Graduate School Chinese Academy and Sciences Shanghai China Shanghai Institute of Applied Physics Chinese Academy and Sciences Shanghai China State Key Laboratories of Transducer Technology Science and Technology on Micro-system Laboratory Shanghai Institute of Microsystem and Information Technology Chinese Academy and Sciences Shanghai China Chinese Academy of Sciences Beijing Beijing CN

Based on silicon nanowires (SiNWs) fabricated by MEMS technology, highly sensitive, sequence-specific and label-free DNA sensors were demonstrated in this paper. Optical lithography and anisotropic self-stop etching were employed to guarantee low cost batch production for SiNWs. Amine-functionalized SiNWs exhibit pH-dependent linear current over a wide range. SiNWs with chemically functionalized single-stranded DNA can recognize the complementary DNA at pM range. In contrast, there is no current change for non-complementary DNA even at a high concentration. With small size and potential for mass production, SiNWs can be potentially developed to become a portable biosensor.

关键词： DNA Nanowires Silicon Sensors Probes Voltage measurement Real time systems

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Electronic band transformation from indirect gap to direct gap in Si-H compound

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Chinese Physics B 2010年第7期19卷 491-496页

作者：丁建宁王君雄袁宁一坎标陈效双 Center for Low-Dimensional Materials Micro-Nano Devices and SystemJiangsu Polytechnic University Center for Micro/Nano Science and Technology Jiangsu University Key Laboratory of New Energy Source National Laboratory of Infrared Physics Shanghai Institute for Technical PhysicsChinese Academy of Sciences

The electronic band structures of periodic models for S^H compounds are investigated by the density functional theory. Our results show that the Si H compound changes from indirect-gap semiconductor to direct-gap semiconductor with the increase of H content. The density of states, the partial density of states and the atomic charge population are examined in detail to explore the origin of this phenomenon. It is found that the Si-Si bonds are affected by H atoms, which results in the electronic band transformation from indirect gap to direct gap. This is confirmed by the nearest neighbour semi-empirical tight-binding （TB） theory.

关键词： Si-H compounds band structure density functional theory tight-binding calculation

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The effect of generating body and Reynolds Numbers on improving fluid vibrating force in micro size

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Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 2011年第12期32卷 2056-2059页

作者： Ran, Jing-Yu Yang, Yuan National Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology Chongqing University Chongqing 400044 China Key Laboratory of Low-Grade Energy Utilization Technologies and Systems Chongqing University Chongqing 400044 China

The research on the effect of low Reynolds number and generating body on flow characteristics and fluid vibrating force is of high value to develop and utilize weak breeze energy. In this paper, flow conditions with different generating bodies (circular cylinder, triangle cylinder, square cylinder) and different Reynolds Numbers (20, 40, 60, 100, 200, 400, 500, 1000) are simulated using finite volume method. The flow characteristics and fluid force in different conditions are compared and analyzed. The results show that the maximum value and average value of fluid force, f¯t and ft,max, increase with Re increasing. At the same time, f¯t (triangle) > f¯t (square) > f¯t (circular);ft,max (triangle) > ft,max (square) > ft,max (circular). When Re=1000, ft (triangle)=0.112 N, ft (square)=0.0914 N, f¯t (circular)=0.077 N.

关键词： Reynolds number

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An intelligent electronic capsule system for automated detection of gastrointestinal bleeding

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2010年第12期11卷 937-943页

作者： Hong-ying LIU Gang WANG Kang WEI Xi-tian PI Lan ZHU Xiao-lin ZHENG Zhi-yu WEN Key Laboratory of Biorheological Science and Technology of Ministry of Education College of Bioengineering Chongqing University Chongqing 400030 China Key Laboratories for National Defense Science and Technology of Innovative Micro-Nano Devices and System Technology Chongqing University Chongqing 400030 China

In clinical practice,examination of the hemorrhagic spot (HS) remains *** this paper,we describe a remote controlled capsule (RCC) micro-system with an automated,color-based sensor to identify and localize the HS of the gastrointestinal (GI) *** vitro testing of the detecting sensor demonstrated that it was capable of discriminating mimetic intestinal fluid (MIF) with and without the hemoglobin (Hb) when the concentration of Hb in MIF was above 0.05 g/***,this RCC system is able to detect the relatively accurate location of the HS in the GI tract.

关键词： Smart capsule Intestinal bleeding Color sensor Biomedical micro-electromechanical system （BioMEMS）

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Study on the influence of combustion in the combustion chamber of the porous media for MTPV system

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of technology 2011年第SUPPL. 1期43卷 360-363页

作者： Ding, Jian-Ning Dong, Yu-Zhong Cheng, Guang-Gui Ling, Zhi-Yong Fan, Zhen Micro/Nano Science and Technology Center Jiangsu University Zhenjiang 212013 China Low-Dimension Material Micro/Nano Device and System Center Jiangsu Polytechnic University Changzhou 213164 China Key Laboratory of New Energy Engineering Changzhou 213164 China

micro-chamber is one of the key components of micro-thermophotovoltaic (MTPV) system, whose photon radiation ability can intensify with the rising of temperature, resulting in the raise of outputting power of the system. Therefore, it is essential for the MTPV system to rise the micro-combustion chamber temperature. This article analysizes and expounds the influences of the factors, including the ratio of hydrogen to oxygen, the total mixture flow and the outputting pressure of hydrogen and oxygen, on the distribution of temperature of the wall of micro-combustion chamber. The experiment results indicate that when the ratio of hydrogen to oxygen is 1.2:1, the wall of the micro-combustion chamber could achieve the highest temperature, which rises with the increasing of the total mixture flow and the outputting pressure of hydrogen and oxygen. Therefore, in order to obtain a higher temperature of the wall of micro-combustion chamber and a high efficiency of the system, 1.2:1 for the ratio of hydrogen to oxygen is most preferable. Also the total mixture flow and the outputting pressure of hydrogen and oxygen should be as high as possible.

关键词： Combustion chambers

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A new demodulation method with diversity technique used in MB-OFDM UWB system

A new demodulation method with diversity technique used in M...

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2nd Asia Pacific Conference on Postgraduate Research in microelectronics and Electronics, PrimeAsia 2010

作者： Su, Wenyan Liu, Liang Ye, Fan Ren, Junyan State Key Laboratory of ASIC and System Micro/Nano-Electronics Science and Technology Innovation Platform Fudan University Shanghai China

ISBN: (纸本)9781424467372

In this paper, we focus on the Dual-Carrier modulation (DCM) technology in the Ultra Wide Band (UWB) wireless communication system. A new demodulation algorithm - getting fully usage of frequency diversity in the UWB channel is proposed. system simulator result shows that the proposed method can get 1.5dB gain at the Per (Packet error) performance of 8% while the data rate is 480Mbps under IEEE CM1 channel. What's more, the method can be implemented by a much fewer complexity hardware architecture, for it avoids LLR calculation in the traditional method.

关键词： Demodulation

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