一种2.92-KHD型射频连接器的仿真分析与设计

随着用户对射频连接器性能要求的越来越高,以及对射频连接器的研发生产发周期亦越来越短的需求,作为产品设计师必须掌握更加高速的有效的连接器设计方法和思路.利用Ansoft公司的HFSS软件强大的电磁仿真功能,能够快速获得连接器的射频性能,极大地提高了设计的准确性和效率,能更好的服务用户,为用户提供高品质的射频连接器.本文通过为用户设计定制的2.92-KHD型射频连接器的过程,简述了HFSS软件在连接器设计过程中的重要作用,及仿真分析结果与产品实测结果的对比分析,给出了产品实测数据与仿真分析之间产生偏差的原因.     

一种高速背板用高密度数据传输连接器设计

本文从理论设计、仿真分析和产品测试三个方面对一种高速背板用高密度数据传输连接器进行了分析设计。通过对连接器差分信号的特征阻抗、串扰、插入损耗等参数的分析,对连接器的插针接触件、PCB传输线和介质体进行了设计。此外,采用电磁场与电路联合仿真的分析方法,从时域、频域和数据域三个方面对所设计的连接器进行了仿真分析。最后,通过测试夹具对所设计的连接器进行了信号完整性测试,测试结果表明：连接器具有良好在高速传输性能,在高速传输通信系统中具有良好的应用前景。     

KH型光电混装连接器的设计

本文介绍了我所混装光电连接器系列中其中一种连接器的设计原理,以及在该产品中所采用的新型安装板的设计,并利用ANSYS软件进行了仿真和优化,提高了产品的可靠性。     

低频连接器的载流设计及试验

接触件的载流是低频连接器设计的关键,对连接器的使用寿命有重大影响。给出低频连接器载流设计方法,并通过相应电流试验方法加以验证。     

软件与工具

Coventor电磁环境仿真软件Coventor公司与MEM Research公司进行独家合作,推出提供仿真MEMS器件的2.5D和3D电磁技术。该产品名为EM3DS,为设计人员计算微系统上的电磁效应提供定制方法。这个仿真软件工具是对Coventor公司现有软件工具套件CoventorWare的补充,该套件用于射频、微波和MEMS器件。EM3DS也可独立使用。它采用MoM(method-of-moments)平台,不同于基于有限元法(FEM-based)的典型仿真方法。MoM适合于那些高纵横比(最大尺寸与最小尺寸比很大)的结构。据称,在需要重视纵横比的情况下,如平面结构,MoM可进行更快的2.5D和3D…     

趋向集成化的EDA工具平台

软件工具设计者正通过各种巧妙的方法，把不同的软件工具结合成一个独立的集成化设计环境。为了完成整个设计流程，从开始到结束，设计者使用的软件工具越来越多。这些工具所提供的各不相同的用户界面和使用方法、以及各工具间必需的数据传输在很大程度上加重了设计者的负...     

高速连接器差模到共模转换的控制

随着计算机数据传输速率的不断提高,从1998年的PCIX66Mb/s总线频率到2010年的PCIE第三代8Gb/s总线频率,系统中的高速连接器的电特性设计成为系统设计的一大关键要素。本文主要讨论如何控制高速连接器差模到共模的转换,通过一些高速连接器作为例子来进行仿真和实验论证。     

宽频带EMI滤波连接器的滤波结构设计

EMI滤波连接器是传输信号和抑制导线或电缆电磁干扰的器件。文中介绍了一种用于宽频带低通EMI滤波连接器的设计,重点描述了该滤波器的滤波原理和结构设计,并对滤波插针的有关参数进行了理论计算以及仿真。     

电连接器接触件优化设计研究

电连接器的接触件（插针、插孔）是航天电子元器件的关键零件，是电子设备信号传输的直接载体，起着把信号从电连接器的输入端传送到输出端的作用，其接触性能的可靠与否，直接影响着信号的传输。以提高航天电子元器件电连接器的接触可靠性为研究目标，通过基于MSC系列软件，用该软件自带的PCL语言开发的仿真系统，对接触件的性能参数进行计算机仿真分析，并通过实例验证，最终达到优化接触件设计的目的。     

矿用电缆连接器可靠性技术研究

电缆连接器是通信的主要传输介质,矿用电缆连接器是井下控制系统的信号传输介质,其可靠性直接影响系统的稳定性。多年的现场应用经验表明,由于井下的特殊环境,直接影响连接器可靠性的因素主要为连接器的锁紧、防护及连接器接触对的结构及材质等。本文通过针对连接器的专项研究和试验,总结相关参数、工艺和设计方法,为矿用电缆连接器的改进和设计提供参考数据。     

A better technique using multisegment modeling and analysis of high-density and high-speed connectors

A useful and rather new simulation technique for connectors up to 6.25 GHz is presented and discussed in this paper. The proposed model extracts electrical parameters of a connector using time-domain reflectometry (TDR) measurements. A new technique was developed to obtain accurate impedance profiles using TDR and a multisegment approach that is effectively a distributed coupled model. The parameter extraction and characterization of connectors are discussed. The performance of the proposed segmented transmission line model is verified by simulation of the model in SPICE and by experimental measurement. The results show that the proposed model can simulate the electrical characteristics, including crosstalk and impedance, of high-density and high-speed connectors with satisfactory accuracy. Based on the proposed modeling and CAD simulators, the design and analysis of complicated high-density and high-speed connectors can be executed accurately and effectively. Compared with other previous models, the proposed model can significantly improve the accuracy of simulation.     

背板互连线高速信号传输的计算机仿真

采用ABCD矩阵法对传输高速信号的背板上具有频变参数的互连线建立等效时域网络模型,并给出接插件等效传输线模型和端接的I／O缓冲器IBIS瞬态行为模型,利用这些模型对实际电路进行仿真,其结果与Ansoft公司的PNC软件仿真结果相吻合,仿真效率有明显提高。     

面向服务体系结构的连接器规约及其验证

连接器建模是软件体系结构设计中研究的重要问题之一.同样,考虑到面向服务体系结构松散耦合的特性,对其所涉及的连接独立于服务的设计进行规约也是一个关键问题.本文将SOA中的服务连接抽象为面向服务设计中的第一类实体--面向服务体系结构的连接器.给出了SOA的连接器模型的规约,并采用π演算作为文中方法的形式化基础以实现对其特性...     

A web-based user friendly simulator of optical fiber communication systems

A simulation tool in optical networks design and evaluation is suggested. This user friendly software, baptized “SystemBuild”, is a powerful tool to simulate optical fiber communication systems and can be easily used for both educational and research purposes. People modeling optical networks can use it to investigate the usefulness and the accuracy of their model as well as the performances of the system they intend to implement. This Web-based software needs neither a license nor an installation. Merely, a conventional Internet browser supporting Java plug-in is necessary. Moreover, the software can run in all platforms that include the Java Virtual Machine (jvm). Signals and values can be directly checked by moving the mouse pointer over the component’s connectors allowing an easy debugging and assistance to the users to build a complex system. The quality of collaboration is offered thanks to the free code access to the platform.     

An interconnect model for arbitrary terminations based on scattering parameters

An interconnect model, using the equivalent circuits derived from either the recursive or the nonrecursive evaluations of the convolution integral, is presented to show how arbitrary terminations can be efficiently handled in the high-frequency simulation environment. To achieve robustness in the recursive case, the impulse response is partitioned and Prony's method is applied to extract the exponentials. With the experimental data provided by scattering parameters, the model can be formulated for nonuniform lines, MCM connectors, etc. The equivalent circuit comprises of physically realizable elements available in general-purpose circuit simulators such as SPICE, and simulation performance for several case studies shows the applicability of this model to high-frequency circuit simulation and design.     

Lifetime prediction of electrical connectors under multiple environment stresses of temperature and particulate contamination

Electrical connectors play a significant role in the electronic and communication systems. As they are often exposed in the atmosphere environment, it is extremely easy for them to cause electrical contact failure. It is essential to carry out the reliability modeling and predict the lifetime. In the present work, the accelerated lifetime testing method which is on account of the uniform design method was designed to obtain the degradation data under multiple environmental stresses of temperature and particulate contamination for electrical connectors. Based on the degradation data, the pseudo life can be acquired. Then the reliability model was established by analyzing the pseudo life. Accordingly, the reliability function and reliable lifetime function were set up, and the reliable lifetime of the connectors under the multiple environment stresses of temperature and particulate contamination could be predicted for electrical connectors.     

18m天线的CAE技术应用

以18m天线为例,介绍了利用MSC.Patran/Nastran有限元分析软件进行数字化建模的过程,给出了天线载荷的计算方法,并根据系统仿真给出的分析结果,论证了设计方案的可行性。介绍了利用Pro/E软件进行3D实体建模,根据其参数式设计概念和全相关性进行结构设计的过程。阐述了CAE软件将在天线结构设计中发挥的重要作用。     

Analysis and Prediction of Vibration-Induced Fretting Motion in a Blade/Receptacle Connector Pair

Connector fretting propensity is generally evaluated through an exhaustive series of experimental tests, making the connector design and validation process time consuming and costly. Thus, a method using modeling and simulation techniques to predict the influence of various design factors on vibration-induced fretting propensity in electrical connectors would be very beneficial to those responsible for connector design and application. One approach is to use detailed finite element models for the connector system to relate the actual dynamics of the contact interface to the threshold vibration levels required for the onset of fretting and the relative motion transfer function. The present study describes one such model for a single tin-plated blade/receptacle connector pair. Concurrent simulation and experimental studies were performed to evaluate the threshold vibration levels as a function of excitation frequency, interface friction coefficient, and normal force. Good correlation between the experimentally observed results and those predicted by the models were obtained. Some insights and observations with regard to the effectiveness of such a modeling approach are also presented.     

SC-type single-mode optical fiber connectors

SC-type single-mode optical fiber connectors specifically developed for subscriber loop networks are discussed. The properties and design of precision zirconia ceramic ferrules which have been found to be ideal for high-performance, low-cost single-mode optical fiber connectors are described. A design approach featuring a plastic-molded rectangular connector housing using a push-pull coupling mechanism which has also been found to be suitable for durable, compact, and low-cost connectors is presented. SC connectors used with 10/125 single-mode fibers exhibit insertion loss of 0.06 dB and return loss of 38.6 dB, with no degradation during and after mechanical and environmental tests. To realize higher packaging density, duplex-ferrule connectors, quadruple-ferrule connectors and optical attenuators have also been developed on the basis of the SC connector design