最新刊期
卷 ， 期 5 ， 1986
- 摘要：The characteristics of the continuous logic （CL） and its applications are studied. The results show that the conventional architecture of systems, with A/D and D/A converters to link up the analogue parts with the digital parts, might be changed by using CL.Thereafter the direct ultra high speed "digital processing" of the analogue signals could be realized.The applications as spread or compression of the time axis of the analogue signals, the digital controlled analogue signal delay circuits, the real-time voting circuits for analogue signals, realization of arbitrary function S = F（X,Y,Z,…） of the analogue signals X, Y, Z,…, the exchange this for that between time, space and amplitude axes etc, are discribed.The real ICs of Continuous Logic applying to the high-speed realtime Fourier transformation are introduced. The results of the primary experimental set comes up to 16 MHz sampling frequency, and 2μs transform period for 32 points, with simple circuits and potentiality in much higher speed.4|62|42更新时间：2025-12-08
- 摘要：The propagation of electromagnetic waves in forest enviroments at UHF （200 MHz-2000MHz） is examined for the case where both transmitting and receiving dipoles are situated within the vegetation. At UHF, the forest must be considered to be a discrete random anisotropic medium and the radiowave propagating within this medium may be represented as the sum of a mean field component and a fluctuating component. For the mean field component, the forest model is represented as a four-layered medium with two anisotropic slabs be tween the air and the ground to represent the tree trunks and foliage for calculating the direct wave, reflected wave and lateral wave. Numerical results reveal that the lateral wave is the dominant wave at UHF and the theoretical results are in good agreement with the available experimental data.2|62|12更新时间：2025-12-08
- 摘要：The redundant design of system reliability is a powerful artifice in increasing the sytem reliability, but it will increase the volume, weight and cost of the system. The fault effects reduction method can be used to solve this problem. Three criteria related with the possibility of the effects reduction design are presented. Some practical examples are given, and a general mathematical model of system reliability concering fault effects reduction is derived.2|32|3更新时间：2025-12-08
- 摘要：The multi-alkali photocathode （Rb, Cs） Na2KSb films are studied. The photo-cathode manufactured by means of a new technology has many advantages over the trialkali photocathode, such as higher photosensitivity, better reproducibility, less thermal emission and, particularly, much improved response to light in the green-red-infrared portion of the spectrum, photoelectron-emissive mechanism of the photocathode films are discussed and a new strcture model of energy bands at surface of the of the （Rb, Cs） Na2KSb is proposed. The use of the model to explain the result of the experiment is satisfactory.2|29|4更新时间：2025-12-08
- 摘要：The characteristics and the generation of the linear block codes for the error correction of multivalued logic are discussed. A system of circuit realization for the error correction is introduced. A new type of gate DYL, a linear AND-OR gate, is adopted in the realization of the error correction system. The discussion centers on ternary and quaternary logic.2|45|3更新时间：2025-12-08
- 摘要：A generalized design method of microwave π-hybrid Butler matrix with special transfer phase characteristics for direction finding applications is provided by matrix extending technique. Based on the equivalent relation between π-hybrid and π/2-hybrid circuits, a transformation procedure between π-hybrid matrix and π/2-hybrid matrix is given. Making phases shifters eliminated or merged, the number of components and phase shift values used in the matrix circuits would have a significant decrease, which is quite helpful to windband DF application.2|138|3更新时间：2025-12-08
- 摘要：A CAD procedure applicable to broad-band GaAs FET amplifiers is presented.The design and measurement results of two types of broad-band GaAs FET amplifiers are given. For 4-8 GHz amplifiers, power gain Gp =33dB±1.5dB, and noise figure Fn≤3.7dB. For 8-12GHz amplifers, G, =30dB±1.5dB, and Fn≤6dB.2|15|0更新时间：2025-12-08
- 摘要：A new quasi-two-dimensional model for short-channel MOSFET’s is presented. Taking into account the two-dimensional effects throughout the channel, a unified equation valid in both the unsaturation and saturation regions is derived, and the problems resulting from dividing the channel into two regions in the conventional two-region models are solved. The calculated results are in excellent agreement with the experimental data.2|27|0更新时间：2025-12-08
- 摘要：This paper describes how to suppress interference modes in coaxial magnetrons and how to choose a suitable inner cavity resonant frequency. A new method of suppression of interference modes is suggested. In order to separate the high and low branches of resonant frequencies of different modes in the inner cavity, a "rising sun" cavity structure is used. The cold properties of the inner cavity are analysed, measured, and compared with those in a co mmon coaxial magnetron. The method of computer-aided design for the cavity is also given.2|52|0更新时间：2025-12-08
- 摘要：The FM noise measurement system using a delay line discriminator is presen-ed, its measurement principle is discussed, and some main formule are given. This system can be operated on the frequency 1GHz to 6GHz. At 2GHz, it is easy to get the measurement threshold of the frequency deviation about 0. 1Hz/Hz （when f>lkHz）. When the low-noise amplifier is used, this threshold can be of the order of magnitude of 0.01Hz/Hz. Using this system, the optimal PLL bandwidth of a phase-locked oscillator can be adjusted easily. The example and results of this adjustment are given.2|58|2更新时间：2025-12-08
- 摘要：A virtual diagnosis model for computer systems is proposed, wherein a subsystem is considered to be a union of a task processor and a communication processor. The idea of preforming virtual tests and virtual diagnosis is presented, followed by the criteria for diagno-sability, both for centralized and distributed control. An optimal design for diagnosable systems is also presented. The results obtained show clearly that the virtual diagnosis can identify more faults than t-fault diagnosis under the same structural constraints.2|23|1更新时间：2025-12-08
- 摘要：A real-time one-lens white light information processing system is described in which spatial filtering is used to spot defects on IC photomasks. Check-up with this system is simpler, faster and more convenient than the traditional microscopy or laser coherent optical processing technique. With the aid of this system, such defects as black spots, pinholes, scratches, loss of circuits, short-circuits or disconnections, etc, can easily be located, and defects as small as a minimum of 2μm linearity can also be detected.2|36|2更新时间：2025-12-08
- 摘要：A state model map of piecewise linear resistive networks and its three fundamental operations are defined, and the operational rules of the maps are also given. The state models of series and parallel networks can be estibilished by using these rules.2|26|2更新时间：2025-12-08
- 摘要：A solid state source for generating microwave CLFM signal is presented. The VCO using 3cm band tuning gunn diode oscillator is combined with the phase-locked loop. Its principle and characteristics are discussed, and the experimental results are given.2|13|0更新时间：2025-12-08
- 摘要：A new optimization algorithm is presented. This algorithm using highorder approximation for the objective function requires nether derivative calculation nor linear search, and has high convergent rate. It has been incorporated into ADIC-2,an analysis and designprogram for general curpose circuits. Its high efficiency is illustrated by some numerical andcircuit design examples.2|76|0更新时间：2025-12-08
- 摘要：The finite-difference method is used in the study of the electrical behaviors of ring and cylindrical dielectric resonators, which are placed on dielectric substracts and shielded by metallic cases. The resonant frequency is calculated as a function of the system parameters, and the curves of the field strength variation and the contours of individual field components are ploted. The numerical results are verified by experiments, showing a deviation of less than one percent.2|78|3更新时间：2025-12-08
- 摘要：A discussion of the significance of multiple-valued logic and the relationship between multiple-valued logic and electronic science and technology is presented. A survey of the present-day status and future trend is given which includs multiple-valued logic circuits, logic design of multiple-valued digital systems and applications of multiple-valued logic.2|277|29更新时间：2025-12-08
- 摘要：The influence of different substrate temperatures on the size of condensed particles, condi tion of crystallization and growth rate in the Si deposition films during the PCVD processes is studied and the experimental results are discussed correspondingly.2|13|0更新时间：2025-12-08
- 摘要：This paper introduces the processing method of the photocathode by evaporating antimony through the grid mesh and the measures taken in order to improve the static and dynamic backgrounds of the tube. The measured sensitivity of the photocathode is up to 140μA/lm.2|18|0更新时间：2025-12-08
- 摘要：Under the condition of eigenvector excitation, an exact mathematical verification on the field component expressions of the g-port symmetrical H-plane waveguide junction is presented by means of a periodic slow-wave structure theorem. Meanwhile, the mathematical expessions for scattering matrix elements obtained by matrix algebra in the preceding literatures are also derived by the use of the physical meanings of the scattering parameters.2|12|0更新时间：2025-12-08
- 摘要：According to the analysis of the field induced in a rectangular wave guide, it is explained that the field obtained from the L vector wave functions is just the same as the space charge field, and the odd term in dyadic Green’s function-（Z·Z/k2）δ（R-R’）is only a part of the space charge field, expressing the uncontinuity of the space charge field in the source region.2|40|5更新时间：2025-12-08
- 摘要：Based on the theory of six-port circuits,a set of optimum design criteria for six-port circuits is derived from a theoretical analysis of six-port circuits on its measurement error resulted from its power measurement error. The optimum six-port network parameters are given, which agree with the design criteria given by G. F. Engen. The computer simulation results are in agreement with the theoretical analysis.2|34|1更新时间：2025-12-08
- 摘要：<正> 由中国电子学会主办、天津电源研究所和中国电子学会化学与物理电源学会承办的PVSECⅡ于今年8月19日～21日在北京香山召开。来自美国、日本、英国、加拿大、意大利、西德、法国、比利时、伊朗、印度、葡萄牙、丹麦、泰国等十三个国家的106位外国专家和140多位中国专家参加了这次会议。有172篇论文（其中中国的68篇）收入了会议论文集。3|11|0更新时间：2025-12-08
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