最新刊期
卷 ， 期 2 ， 1978
- 摘要：With the rapid development of the semiconductor integrated circuit technology, the cellular computer becomes an important trend for giant computers. There is no doubt that multiprocessor systems, array processor systems and associative array processor systems may be cellulated. But what will be with the more preferable giant vector computers for which the language may be expanded on the basis of the standard languages, the operating rules are similar to the conventional rules, and the efficiency is higher?Can they be cellulated? this is what the present article will discuss in detail and the answer is positive. In this paper, some vector expansion of the standard language and an architecture of the vector computer of vertical and horizontal processing are described.Furthermore, the architecture of the normal cellular vector computer, and the architecture of cellular vector computer of vertical and horizontal processing are discussed.Finally, the advantages and the limitations due to which the number of cell-elements of vector computers can’t be very large are described.2|24|1更新时间：2025-12-08
- 摘要：Corrugated wall horns and smooth wall multimode horns are two comparatively ideal feeds with high efficiency. Further study on mode conversion between the two types of horns is presented. The concept of combining hybrid mode technology for corrugated wall with multimode technology for smooth wall in one horn is suggested. An engineering design method for using it to control the characteristics of different frequency zones respectively is depicted. The complex multimode horn which is of small size, good performance and easy to manufacture is successfully developed. The antenna efficiency may be increased up to 70% with the improved version of double-mirror antenna feed for the 4/6GHz band （except a few f requencres）. The possiblity to develop high efficient new feeds by making combined use of various hybrid mode and smooth wall multimode technologies is demonstrated.2|144|6更新时间：2025-12-08
- 摘要：The helix coupled vane and helix coupled bar circuits belong to a new type of slow wave structures for high power crossed-field amplifiers. These circuits are characterized by their very wide bandwidth, relatively high coupling impedance as well as high average power-handling capability, and hence obtain wide applications. Both multi-conductor transmission line method and equivalent circuit method are used to carry out theoretical analysis of these SWSs. Analytical expressions for dispersion characteristic, coupling impedance and transverse field distribution are derived; the effects of each dimensional variation on dispersion characteristics and coupling impedance are given on the basis of a large quantity of computer results. A comparison between computed and experimental values indicates that results given in this paper are sufficient for engineering design purpose.2|43|2更新时间：2025-12-08
- 摘要：A new high speed integrated logic has been described. Instead of a single type of cell gate which is used in most logic IC’s, the new logic here described is based on several types of basic cells to synthesize a logic system. Therefore, the threshold characteristic will not be the common requirement for each type of cell gates. The main logic unit in DYL is a very high-speed linear AND-OR gate made with simple technology （without threshold）. A four-bit full adder carry chain specimen has been developed with wide-line photolithography. It’s time-delay measured for each carry stage is about 1 ns for the front edge of the signal and even much smaller for the trailing edge. The maximum power dissipation per gate is about 12.5mW. This new logic has been analysed and compared with several conventional integrated logic circuits.3|103|74更新时间：2025-12-08
- 摘要：The three-dimensional heat conduction equation for steady state operating conditions of bipolar microwave power transistors has been solved.Based on the principle of thermal-electric feedback, the nonuniform distribution of current and juc-tion temperature in bipolar microwave power transistors have been calculated, the effects of the collector bias voltage and emitter ballast resistors on this distributions have been discussed quantitively, and a ballast technique of the unequal values of the resistors has been presented.The experiments have shown that the use of this technique in microwave power transistors has given rise to a considerable improvements in uniform distribution of junction temperature and current.2|69|8更新时间：2025-12-08
- 摘要：The non-linear estimation of time-varying parameters of singals in the presence of noise is discussed. A concept of instantaneous maximum likelihood estimation is presented and is shown to be asymptotically sufficient. A new approach of optimum estimation has been found by which the diffcult problem of non-linear estimation of time-varying parameters of signals is simplified as first finding the instantaneous maximum likelihood estimation and then its optimum processing.The apparatus used to realize the instantaneous maximum likelihood estimation is defined as optimum demodulator and its general configuration is given. The application of the above theory is described with the phase-modulated signal used as an example. Finally, the results obtained in this paper are compared with those of D. C. Youla and D. L. Snyder.2|34|0更新时间：2025-12-08
- 摘要：A general equation revealing the relationship between the attenuation at passband center A （ 0 ） and the parasitic dissipation factor of the elements o and input dissipation factor d is derived for all-pole type lossy filter. Based upon this equation, families of curves are computed and plotted for three conventional types of filters. For filters with given element dissipation factor, both the optimum selection of the input dissipation factor and the determination of the attenuation at the passband center can be readily accomplished with the aid of these curves. If the allowable range of the attenuation at the passband center is given, the same families of curves enable us to determine conveniently the corresponding allowable range of the element dissipation factor.Some problems of practical interest are also discussed in connection with examples.2|70|1更新时间：2025-12-08
- 摘要：An ultraviolet XeF exciplex laser pumped by electron-beam is described. A high density rectangular electron beam is obtained easily by using a long razor-shape cathode and the active material is successfully pumped by this type of beam.2|21|0更新时间：2025-12-08
- 摘要：<正> 今年五月卅一日至六月二日,本刊编辑部和《电子科学技术》、《国外电子技术》、《电子简报》三个编辑部,在北京市联合组织了一次学术座谈会。应邀参加座谈的三十多位我国电子学界半导体学科的部分科学家和技术专家,就被他们誉为“金字塔上的明珠”的大规模、超大规模集成电路,进行了一次很有意义的学术座谈。在座谈中,与会人员对如何造就摘下这颗明珠的条件、如何使之多快好省地为在我国实现四个现代化服务的问题,广泛地交流了学术见解与实践心得,气氛甚为活跃。如下各点是本刊通信员对讨论中所涉及的学术问题和学术见解的简要综合评述。2|15|0更新时间：2025-12-08
- 摘要：<正>中国电子学会遵照全国科学大会的指示精神,于今年四月,开始着手恢复国内的学术交流活动,并在六月上旬,召开了今年的第一个学术交流会,认真提倡百家争鸣,把被林彪、“四人帮”践踏了十数年的学术活动,重又活跃、兴旺起来。到十一月底止,陆续举行了有关计算机、激光、半导体和集成技术、雷达、通信以及元件等方面的15个学术交流会,共收集到论文和技术报告1071篇,其中有207篇在会上进行了宣读。3|21|0更新时间：2025-12-08
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