现代军用通信设备结构设计新理念

科学技术在不断发展，军用通信设备结构设计的内涵也在不断丰富，时代在不断进步，人们对设备的审美要求越来越高，设计人员应顺应时代发展的潮流，积极吸收、采用新的设计理念。本文详细讨论了有关军用通信设备结构设计新理念的主要内容-创新设计、模块化设计、小型化设计、工业设计和超前设计。     

集成pH－ISFET／压力传感器的研究

基于ＳＤＢ／ＳＯＩ材料和硅微机械加工技术，提出了一种含微参比电极和择优差分补偿单元的背面引线ＰＨ－ＩＳＦＥＴ／压力传感器的新结构。并且设计了高稳定的可调芯片自恒温系统，以减少硅材料对温度敏感的效应。这种结构既方便地实现敏感元和信号处理电路的完全隔离，又有效地改善了敏感特性和稳定性。初步实验结果证实了新结构设计是成功的。     

FE approach and experiments for an axisymmetric micro-yoke part forming using grain element and grain boundary element

Until present, an axisymmetric yoke part of electro-magnetic micro-speaker/receiver had manufactured by machining through the material’s removal. However, this machining process have some problems such as long production time, high precision of tool and costs. In this study, a program based on finite element method developed to establish milli-structure forming technology for micro-yoke component, one of the key parts in the multi-functioned micro-speaker/receiver. This developed program is applied for the milli-part forming in order to replace the machining process of micro-yoke. A new numerical approach is proposed to simulate intergranular milli-structure in forming the miniature yoke, in which grain elements and grain boundary elements are introduced. The results of the finite element analysis for micro-yoke part are confirmed by a series of experiments.     

无刷电机驱动器在大型医疗设备上的应用

无刷电机及其驱动器在大型医疗上的设备应用越来越广泛。为了设计更好的医疗设备、造福患者,研发人员需要对驱动器有更深的理解和更好的选型及应用。需要理解无刷电机及驱动器的工作原理,清楚大型医疗设备对无刷电机驱动器的要求和实现方式,如安全性、可靠性、通讯等。在医疗设备开发中,驱动器的应用有多种方案,它们各具特点,包括通用驱动器,板载驱动器、自主研发驱动器。随着技术的发展,无刷电机驱动器在大型医疗设备的应用,出现了新的趋势,如:小型化、一体化、模块化和集成化。     

微米和中间尺度机械制造

微米和中间尺度机械制造的概念源于对广泛材料范围内的精密三维微米和中间尺度零件日益增长的需求。微米和中间尺度零件是指尺寸在0.01～10mm范围的微小零件,因而处于基于微电子的MEMS技术与传统的机械加工技术之间的领域。然而,目前的设备性能和尺寸计量方法生产单个微米和中间尺度零件的能力已经显示出局限性。因此,许多研究者正在探索有关新的或传统的机械制造技术在该尺度的应用问题。基于美国国家科学基金会主办的微米和中间尺度机械制造专题讨论会,介绍了日渐显现的微米和中间尺度机械制造技术的背景和现状,讨论了其应用的科学、技术和商业化挑战,以及其有效开展和实现的主要使能技术,给出了需要广泛研究与发展的几个主要方面问题。最后,提出了开展和证明微米和中间尺度机械制造可行性研究比较有希望的方法和策略。以此希望能对我国微米和中间尺度机械制造技术领域的研究有所启迪。     

Miniaturized microstrip branch-line coupler with good harmonic suppression performance

This paper presents a miniaturized microstrip branch-line coupler with good harmonic suppression performance. The proposed coupler consists of four branch-line sections, each of which is loaded by open-circuit stubs both at the center and the two ends. This type of loading can realize size reduction and harmonic suppression. As an example, a proposed branch-line coupler operating at 1.0 GHz is designed, fabricated and measured. The results show that the proposed branch-line coupler occupies 67% size of a conventional one and has better than 20 dB suppression from 1.9 to 5.8 GHz. Furthermore, the high slop of the transition band ensures good selectivity of the coupler.     

Design,fabrication and characterization of miniature RF MEMS switched capacitor based phase shifter

This paper aims to present in detail the design, fabrication and the various characterization techniques adopted in realizing a novel miniature-size switched capacitor based phase shifter. The work strives to provide an all-round development of a DMTL (Distributed MEMS Transmission Line) based phase shifting unit yielding an overall phase shift of 15° at a frequency of 15 GHz. The RF MEMS (Radio Frequency Micro Electro Mechanical Systems) Switched Capacitor based phase shifter has highly miniaturized dimensions, and is capable of solving many limitations to which the conventional Switched Capacitors are mostly susceptible. This miniature RF MEMS switched capacitor actuates at a low actuation voltage of 12 V, exhibits a fundamental frequency of vibration as high as 1.468 MHz and a switching time of 1.4 µs which is an improvement over the other reported designs. Various characterization results seem to validate the simulations.     

基于超材料结构实现5.8GHz RFID天线小型化设计

设计出一款可应用于RFID（Radio Frequency Identification）系统的5.8GHz传统矩形微带天线,天线辐射贴片尺寸为15.74mm×11.12mm,天线的回波损耗（S11）的实测结果为-23.276dB。此后,在矩形微带天线基础上进行设计改进,通过分别蚀刻15个超材料结构I型谐振环和6个超材料结构开口谐振环(Split Resonant Ring, SRR),构造出两款新型小型化天线。与传统矩形天线相比,在保持方向性、最大增益等参数性能基本不变的条件下,基于超材料结构的天线辐射贴片尺寸分别为12.44mm×9.12mm 和11.74mm×9.1mm,相比传统矩形天线分别缩小了35.2%和41.82%,辐射贴片小型化效果明显,其回波损耗实测结果分别为-21.83dB 和-15.40dB。     

The electro-adsorption chiller: a miniaturized cooling cycle with applications to micro-electronics

A novel modular and miniature chiller is proposed that symbiotically combines adsorption and thermoelectric cooling devices. The seemingly low efficiency of each cycle individually is overcome by an amalgamation with the other. This electro-adsorption chiller incorporates solely existing technologies. It can attain large cooling densities at high efficiency, yet is free of moving parts and comprises harmless materials. The governing physical processes are primarily surface rather than bulk effects, or involve electron rather than fluid flow. This insensitivity to scale creates promising applications in cooling personal computers and other microelectronic appliances.     

用CPLD电路实现激光引信电路系统小型化设计

激光引信小型化是激光引信的关键技术。文中阐述了应用ＣＰＬＤ技术实现激光引信电路系统小型化设计。介绍了器件和软件的选取,描述了用Ｖｉｅｗｌｏｇｉｃ公司的Ｗｏｒｋｖｉｅｗ Ｏｆｆｉｃｅ软件实现激光引信数字电路部分的高度集成过程、设计思路、输入方法、功能仿真、时序仿真和Ｖａｎｔｉｓ器件的生成,并指出了设计过程中应注意的问题。同时,给出了一些解决方法。最后,把用ＴＴＬ器件完成的电路和用ＣＰＬＤ器件完成的电