最新刊期
卷 ， 期 12 ， 1993
- 摘要：In this paper,the deflection aberration theory at extra-large deflection angle is studied by means of the curved axes theory. The second-order and the third-order aberration coefficients are given accordingly. The second-order and the third-order curved axes aberration and the screen raster in the uniform field are computed. The results obtained by the extra-large aberration theory, by the general third-order deflection aberration theory and by the analytic-formula have been compared. It has been shown that when the deflection angle is larger than 120°,the effects of the third-order curved axes aberration must be considered.关键词：Extra-large deflection angle;Deflection aberration;curved axes;Uniform deflection field2|17|0更新时间：2025-12-08
- 摘要：Although elliptic waveguides have already been used in several fields such as satellite communication and radar feed lines, none of the field patterns in elliptic waveguide has been plotted accurately in terms of analytic method in the past litratures. In this paper,the analytic expressions in series for the field components of the cE01 mode in elliptic guide with two different eccentricities are given. The field patterns of this mode are plotted. This method for solving vector fields is exact and standard. The lines of electric and magnetic field are indeed different from those by Chu. The latter’s patterns are incorrect.关键词：Elliptic waveguides;Field patterns;Guided wave2|63|1更新时间：2025-12-08
- 摘要：A kind of generalized matching theory is proposed for multi-port networks,and the concrete method for realizing is given. The study shows that to perfectly match a network, the transmission of the network must be sacrificed in certain degree. Particularly,if the network is complete symmetrical,the module of transmission coefficient should satisfy the unequality |β|<1/（N- 1）. In addition,we found the phenomenon that sudden changes will occur in the generalized matching of three-port reciprocal networks when the network changes from lossy to lossless,which deserves a further research.关键词：Multi-port network;Generalized matching;Connected matrix;Scattering matrix4|173|2更新时间：2025-12-08
- 摘要：In this paper, by replacing the circular inner conductor respectively with inner and outer closed polygon（N = 8）conductors, we obtain their characteristic impedances Zcin,Zcout, as the upper and lower limits of the real value Zc（Zcin>Zc>Zcout）by means of conformal mapping technology. The study of their relative deviations is made and then we get a new method of calculating Zc. The maximum relative error of results obtained by this method to the ones given in [4],[7] is less than 0. 5%.关键词：Circular inner conductor;Rectangular line;conformal transformation;characteristic impedance2|39|1更新时间：2025-12-08
- 摘要：<正> 由哈尔滨工业大学孙圣和教授负责、哈尔滨工业大学航天学院与航天工业总公司第三十五所联合承担的原航空航天部八五航天重点电子预研规划课题“VXI总线雷达自动测试系统”于十月二十三日在北京通过了航天工业总公司组织的部级鉴定. 鉴定委员会由国内航天、微电子、雷达、自动化测试、武器系统等方面的著名专家、教授组成.应邀参加鉴定会的还有航天工业总公司、电子部、铁道部、国家质量技术监督局、二炮、海军等有关单位的领导和专家.2|28|1更新时间：2025-12-08
- 摘要：A new type of method moments,the modified method moments,is presented in this paper. In numerical analysis of EM problems,this method provides with a new idea different from previous method and with a way for saving the computer storage and computation time as well. A number of antennas are analyzed by employing this method and a good agreement is achieved between the calculated results and the published as well as the measured results.关键词：Modified method of moments;method of moments;antenna;electromagnetic field2|92|3更新时间：2025-12-08
- 摘要：This paper discusses the development of optical injection locking techniques,By using the optical phase locking,the phase and frequency of FET oscillation can be independently controlled. The principle of the optical controlled RF phase shifter is also described. Therefore, a new beam forming and steering technique is given. A novel optical controlled phased array antenna system architecture is discussed.关键词：Optical microwaves;Optical phase locking;phased array antenna2|88|2更新时间：2025-12-08
- 摘要：<正> 利用电子科技最新成果——现场可编程门阵列（FPGA）,北京宇光技术开发部已开发成功了ZDC系列数字相关器/匹配滤波器产品,它采用单+5V电源工作,输入输出与TTL兼容,码长从32位到128位.速率从5MHz到30MHz,可广泛用于直接序列扩频通信系统、脉冲压缩雷达系统、导航系统以及雷达/通信信号特征识别系统等.2|260|4更新时间：2025-12-08
- 摘要：The analysis of unilateral finlines has been completed using a new method Regular Solution of Singular Integral Equation. Here, an integrating procedure is adopted and the uniqueness of the fields is determined by the regular conditions for the solutions of the singular integral equations at the edges of the metal strips. Numarioal results show that this method leads to more rapidly converging series solutions. Comparing with the best method spectral domain method, our method can obtain more accurate results with much less computer time. Comparing with the old singular integral equation technique, this method can get much more accurate results with less computer time, simpler formulae and clearer concepts.关键词：Unilateral f inline;Regular solution;CAD2|27|3更新时间：2025-12-08
- 摘要：A matrix perturbation theory in the partial inverse scattering of two-dimensional lossy dielectric cylinder is presented. As a simple physical model of biological body, when the inside properties of a two-dimensional lossy dielectric cylinder partly vary, the scattering fields vary accordingly. In this paper, a simple relationship between the varied scattering fields and varied dielectrics is derived by using the matrix perturbation theory, and the perturbation solutions for inverse scattering are obtained.关键词：Matrix perturbation;Lossy dielectric cylinder;inverse scattering2|50|0更新时间：2025-12-08
- 摘要：For solving integral equations in electromagnetic scattering by using iterative methods, the convergence rate depends on the accuracy of the initial solution. When handling the electromagnetic scattering problems with multiple incident directions, a new extrapolation scheme based on minimization of error can produce accurate initial solution, which speeds up the convergence rate considerably. The examples of scattering by a conducting cylinder and by a dielectric body verify the efficiency of our new procedure.关键词：electromagnetic scattering;Iterative method;Extrapolation scheme2|22|0更新时间：2025-12-08
- 摘要：<正> 由中国通信学会、中国电子学会、中国光学会和北京市科委等联合举办的“第六届全国光纤通信学术会议”于1993年10月14～16日在北京北方交通大学召开.邮电部、中国通信学会、电子部、中国电子学会、铁道部和北京市的领导同志出席了开幕式,并作了重要讲话。钱宗珏、周炳琨、赵梓森分别作了“我国光纤通信发展趋势”、“光电子技术研究进展”和“世界光纤通信系统的发展”特邀报告.2|9|0更新时间：2025-12-08
- 摘要：<正> 低压扫描电镜（LVSEM）的工作电压一般认为是在0.75到3～5kV范围内.其主要优点为:可以减少试样的荷电,直接观察非导体试样而不用涂覆,并减少图形的假象;穿透深度浅,提高图象的衬度和立体感;改进信号噪声比;对于半导体、塑料、高分子的生物试样还可以减少试样的辐射损伤.因此低压扫描电镜成为具有特色的电镜分析工具.近年来国外正在兴起低压2|38|1更新时间：2025-12-08
- 摘要：<正> 继1990年在北京召开第一届国际信号处理会议后,第二届国际信号处理会议于1993年10月27～29日在北京召开.来自澳大利亚、加拿大、墨西哥、日本、中国、香港和台湾等15个国家和地区的200余位代表出席了会议。其中海外代表70余人. 加拿大McMaster大学K.M.Wong教授、日本东京理科大学教授Hiroya Fujisaki、芬兰Nokia公司高级技术2|17|0更新时间：2025-12-08
- 摘要：In this paper, the external-circuit mutual impedances looking outside from active devices mounted in the power combiner are calculated with a field matching technique. The results are related to the large-signal models of active devices by using a frequency-domain harmonic balance technique,and the computer-aided design theory of millimeter wave power combiners is established.关键词：Millimeter waves;Power combiner;Field matching technique;Harmonic balance technique;CAD;External-circuit impedance2|66|0更新时间：2025-12-08
- 摘要：The prolate and oblate spheroidal functions are of importance in the analysis of electromagnetic or acoustical wave scattering from a spheroidal body and some boundary value problems involving a spheroidal body. In this paper,the program flowchart and some useful expressions for computing these two functions are presented,and the algorithms are discussed. The tabulations given earlier by C. Flammer have been extended, and the numerical values of the oblate as well as prolate radial and angular functions have been given to 8-digit accuracy.关键词：Spheroidal wave functions;Angular function;Radial function2|134|2更新时间：2025-12-08
- 摘要：<正> 由中国电子学会半导体与集成技术分会与电子材料分会联合主办,浙江大学高纯硅及硅烷国家重点实验室承办的第八届全国集成电路与硅材料学术年会于1993年10月10日至14日在杭州召开,来自全国60多个单位,270多名代表参加会议.4|10|0更新时间：2025-12-08
- 摘要：A design of a FM/CW system is presented. The transmitting and receiving functions with several polarization combinations are realized by using a mono-aperture compound antenna. The volume and weight are reduced and the area of the sample in the measurement is increased in comparison with the system in which both transmitting and receiving antennas are used. The ability of detection with different polarization combination is improved. This design has been used to the ground based microwave scatterometer.关键词：polarization;Continuous wave;scatterometer2|52|3更新时间：2025-12-08
- 摘要：The consistency theorem on normalized reflection coefficients and its corollary of LC-Ladder two-port networks are presented. And some illustrative examples are demonstrated.关键词：Ladder network;Normalized reflection coefficinet;consistency2|32|0更新时间：2025-12-08
- 摘要：In this paper,with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed. It’ s distribution densities are theoretically derived. An interrelation between the instantaneous multipath time delay （or Doppler shift） and the average normalized power is revealed.关键词：HF communication;Rayleigh fading;Multipath time delay;Doppler shift;Probability distribution.2|266|1更新时间：2025-12-08
- 摘要：The analysis of microwave converter with two large signal excitation （LO and IF or LO and RF） using FDCIBM is discussed in this paper. The unified frequency domain intermodulation balance equations for up-and down-converters are derived,and the measured and analyzed results of a microwave balun diodes up-converter are given.关键词：Nonlinear Circuits;Spectral analyses;Microwave converters4|50|2更新时间：2025-12-08
- 摘要：The Weibull’s density function of probability distribution can be used to represent the spectrum of raindrop sizes. When the cross polarization discrimination （XPD） for the rain induced depolarization of mm waves is calculated by Weibull distribution,the result is in better agreement with that obtained from local precipitation condition than other known distributions of raindrop sizes.关键词：Weibull distribution;Depolarization;millimeter wave2|64|1更新时间：2025-12-08
- 摘要：《电子学报》系中国电子学会主办的综合性学术月刊,它刊载电子科学技术领域内高水平的学术论文和科研成果.为了便于读者检索和阅读,本刊从1992年始,业已将各专业文稿相对集中,基本上分为下面三类刊出:（一）通信、信息论、广播电视及信号处理技术等类文稿.主要集中在第1、4、7、10期刊出;（二）微电子、计算机、量子电子技术、电子器件、材料及测量技术等类文稿,主要集中在第2、5、8、11期刊出;（三）电磁场、天线、雷达、电波传播、导航及电子对抗技术等类文稿,主要集中在第3、6、9、12期刊出. 需要说明:上述文稿分类并非绝对.《电子学报》乃是一个整体学报,根据文稿情况,各专业一部分文稿仍可不按此分类在各期刊出:另一些涉及面广的专业,如神经网络、电路与系统、质量管理等等,拟将根据情况在各期刊出.希望得到广大读者的理解和支持.谢谢!2|47|0更新时间：2025-12-08
- 摘要：<正> 由中国电子学会微波学会主办的全国微波会议于1993年10月25日～30日在合肥召开。此次大会交流了两年来微波领域的新进展、新成果,还举行了微波学会成立30周年的庆祝活动,举办了全国微波产品展览会,参展的国内外厂商34家。出席会议代表近400人,其中三分之二是年青人,这说明我国微波界后继有人。 大会进行了三篇报告:微波学会主任委员林为干教授以“我国微波的科研、生产及教学”为题分析了过去、2|8|0更新时间：2025-12-08
- 摘要：<正> 1993年跨国电气电子工程师学会IEEE第十区第八届学术年会（IEEE Tencon’93）于10月19～21日在北京国际会议中心隆重召开.来自亚、澳、欧、北美四大洲18个国家和地区的近500名代表出席了会议,其中海外代表230余人.IEEE主席M.Sloan女士、IEEE第十区主席T.Nakahara博士、IEEE北京分会主席蔡宣三教授、大会主席叶培大教授、程序委员会主席袁保宗教授、组织委员会主席沙踪教授以及IEEE计算机专业学会、工业2|9|0更新时间：2025-12-08
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