最新刊期
卷 ， 期 1 ， 1985
- 摘要：A new method for analysing an arbitrary lossy network is presented. A phase inequality for general lossy networks is derived. The results are compared with some expreri-mental data.2|92|11更新时间：2025-12-08
- 摘要：<正> 中国电子学会真空电子学专业学会第五届年会于1984年11月26日到12月1日在咸阳市召开。会议分别以大会报告与分组宣讲的形式对73篇经过优选的论文进行了交流。现概括为如下几个专题作一些初浅的评介。 真空电子学的发展 长期以来,我们的注意力过多地集中在真空电子学的单一主角——真空电子器件,特别是微波器件身上,因此十多年来始终被诸如真空电子器件会不会被固态器件取代、哪些真空器件还有生2|14|0更新时间：2025-12-08
- 摘要：A series of empirical expressions are presented for calculating the propagation constant and characteristic impedance of the dominant modes in unilateral, bilateral and antipodal finlines. For the most oft-used finlines. results calculated with these expressions agree, generally within ±4.5 percent, with the values given in [2], [4] and [6]-[10].2|275|24更新时间：2025-12-08
- 摘要：An experimental system is established to perform coherent optical time domain reflectometry at the wavelength of l,15μm using APD or Ge-PIN diode together with a tuned preamplifier. Secondary Fresnel reflection from far end and primary Rayleigh scattering along a 1500m single mode fibre are also observed.2|43|0更新时间：2025-12-08
- 摘要：The statistical properties of the adaptive maximum entropy spectrum estimator （AMESE） are studied using both analytical and computer simulation. The ROC （receiver operating characteristics） which describe the detection performance of the AMESE sufficiently are obtained. It is fairly convenient to design the adaptive filter using these ROC. The comparison between the AMESE and the adaptive line enhancer shows that they are nearly identical in detection performance.2|26|1更新时间：2025-12-08
- 摘要：A bilinear deviation theory for analog circuits is discussed, and an algorithm for the identification of single and multiple faults is proposed, with this algorithm, both hard and soft faults can be located and evaluated from insufficient measurements by solving linear algebraic equations, and the fault testability is independent of the selection of test points. A comparison is made between this algorithm and the other two algorithms with a numerical example.2|14|11更新时间：2025-12-08
- 摘要：New computing formulae for the discrete total square integral are derived by means of bilinear transformation. Simple and practical formulae of noise bandwidth for several main sampled phase-locked loops based on the integral expressions and the important relationship of the formulae are given.2|132|1更新时间：2025-12-08
- 摘要：A printed Chinese character’s quadrantal terminal number and moment of inertia can be used as the unique features for its recognition. Based on this principle, a recognition system has been developed by means of neighbor category compatibility and multi-level classification. The system has a high differentiating power for similar characters, thus meeting the need for a high capacity recognition system for printed Chinese characters. The experiment with 6,000 Chinese characters gives satisfactory results.2|134|1更新时间：2025-12-08
- 摘要：The coupling of electromagnetic power into a rectangular conducting cavity Containing a Conducting wire through a slot is investigated. The equivalence theorem is applied to divide the problem into two parts. A set of functional equations is obtained, and then reduced to matrix form via the method of moments. The general formulas are simplified with narrow-slot/thin-wire approximation. Numerical results indicate that resonance exists at some frequencies of incident electromagnetic wave.2|31|4更新时间：2025-12-08
- 摘要：A new recurtive procedure two-direction Kalman filter is presented for the restoration of imagin corrupted by additive white noise. This method gives considerable saving in computational time.2|44|1更新时间：2025-12-08
- 摘要：<正> 中国电子学会和中国光学学会联合举办的第七届全国激光学术报告会于11月15日至20日在成都市召开。中国光学学会理事长王大珩同志和四川省科委等有关领导出席了会议。参加这次会议的有来自全国25个市省、自治区包括高等院校、科研机构和工厂企业等130多个单位的350多位代表。 会议以大会和分组会形式宣读了130多篇学术论文,书面交流论文90多篇。大会宣读的特邀报告,如高2|13|0更新时间：2025-12-08
- 摘要：:The failure mechanism of oxide-coated cathodes in TV-tubes with different life-span is analysed by IMA and SEM. Results obtained show that the distribution of excess Ba changes from being uniform to non-uniform with time, and excess Ba also appears in the surface layer of the oxide coating. It is found that the back-diffusion phenomenon of excess Ba occurs in active Ni. The total number of excess Ba or Mg in the cathode decreses evidently with lifespan. All these are reasons for the decay in emission of the cathode.2|11|0更新时间：2025-12-08
- 摘要：Direct measurements of electron and hole leakage over the heterobarrier in In-GaAsP/InP lasers are carried out by using a novel laser-bipolar-transistor structure. Experimental results indicate a significant amount of electron leakage under normal laser operating conditions, while hole leakage is found to be negligible. The electron leakage increases continuously with increasing injection, and is sensitive to the ambient temperature. By elimi-lating the electron leakage, an increase of about 30K in the characteristic temperature T0 is possible. The experimental observations can be explained by a model which takes the electric field and carrier heating effect into account. Following this line, a new laser structure is designed and realized, resulting in a low threshold current （-20mA） and a reasonable high T0 （-90K）.2|95|2更新时间：2025-12-08
- 摘要：The breakdown characteristics of capillary tubes are investigated experimentally and theoretically. Using a 6301 type standard calibrating system, the breakdown characteristics of capillary tubes are measured in six gases （H2. N2. He. Ne. Ar, Kr） within the pressure range from 10-1 to 20 torr and they are compared with those of the parallel electrode systems and of the small-area electrode systems free from wall effects. The results show: （1） the breakdown voltage of a capillary tube is always higher than that of the ideal parallel electrode system, provided the spaces between electrodes are equal; and （2） Paschen’s Law is no longer valid for the case of capillary discharge. A theory considering wall effect is presented, and the breakdown conditions are derived. Theoretical and practical results are to some degree in agreement.2|55|7更新时间：2025-12-08
- 摘要：The variation of the state of oxygen in CZ silicon wafer and the distribution of precipitate are studied by infrared absorption measurement, charged-particle analysis and etching metallographic examination. The effect of oxygen intrinsic gettering is proved by some analytical methods such as C-T measurement, neutron activate analysis and.p-n junction test.2|15|0更新时间：2025-12-08
- 摘要：I1-cosh window function is a good approximation of Dolph-Chebyshev, whereas its expression can be given explicitly in time domain as well as in frequency domain. Therefore, it is more convenient for use than Dolph-Chebyshev. Its properties are investigated. Special stress is placed on its applications for the design of filters. In comparison with other designs, say the design based on using Kaiser window or iterative optimization techniques. I1-cosh design is nearly optimal, and requires only a few calculations. Finally, two practical examples of SAW filters based on I1-cosh window are illustrated.2|67|0更新时间：2025-12-08
- 摘要：The evolution of momentum spreads in gyrotron and the saturation mechanism caused by it are investigated by means of the quasi-linear theory. The expressions of output power, efficiency, gain, saturation time and cavity length are obtained, where the effects of the initial longitudinal and trasverse momentum spreads are taken into account. Numerical analysis is also carried out.2|25|0更新时间：2025-12-08
- 摘要：Radar ECM and ECCM form the principal conflicting pair in modern electronic warfare. The technical history and state of arts of both the radar ECM and ECCM are surveyed and their development trends are predicted. The classification of the ECCM techniques, the compatibility of various ECCM devices in a radar system and the effectiveness evaluation of radar ECM and ECCM systems are also discussed.2|275|5更新时间：2025-12-08
- 摘要：The invention of the junction transistor was the result of the combination of the progress in solid state physics with advanced techniques. The possibility of making trans’stor. resistor and capacitor in the same process led to the invention of IC’s.Yield improvement contributed to the success of LSI, VLSI is progressing very rapidly as a result of innovations in chip design and technology. The short channel effect, power density and interconnect resistance reduction. ≤1μm lithography, low temperature process （below 800℃） and high integration package will be critical for further development.9|159|2更新时间：2025-12-08
- 摘要：With D2O-CH3I, D2O-CH3F, CH3I-CH3F and D2O-CH3I -CH3F gas mixtures as the active media of an FIR laser, FIR laser lines emitted from these gases are obtained from the same laser only by tuning the pumping lines of a TEA-GO2 laser. It is confirmed that the gas-mixture FIR laser is a new feasible scheme for obtaining to multiwavelength output in FIR band from the same FIR laser.2|26|2更新时间：2025-12-08
- 摘要：High quality InP Schottky barrier can be obtained by inserting a thin native oxide grown with the anodic oxidation technique, with a barrier height φB greater than 0.70eV and an ideality factor of about 1.1-1.4. An electron trap of 0.62eV is found in the bulk and epitaxial crystals by using the DLTS technique. The barrier height increase can be explained with the generalized model slightly modified.2|31|1更新时间：2025-12-08
- 摘要：A Semiconductor surface varactor with an insulating a-Si layer is presented.It has higher photc-sensitivity,varactor ratio and stability,and is easier to manufacture and very promising for new applications.2|30|0更新时间：2025-12-08
- 摘要：A numerical relationship between a tree T and cotree L in a graph G is investigated, and a new definition of the extremal tree is introduced. After having introduced several sufficient condition for an extremal tree, a method generating the extremal tree is presented.2|8|0更新时间：2025-12-08
- 摘要：An improved algorithum of arctanget function which only needs two multiplication-division operations is presented for radar real time data processing.2|63|0更新时间：2025-12-08
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