最新刊期
卷 ， 期 6 ， 1984
- 摘要：A new method is presented for analyzing negative impedance converters （NIC）, and the influence of the non-ideal performance of the active elements upon the NIC is discussed. A transistorized NIC is designed and used to construct an elliptic function low-pass filter..4|98|0更新时间：2025-12-08
- 摘要：Based on the principle of wave superposition, a new technique for calibrating a dual six-port network analyzer and for measuring the scattering parameters of any two-port device is proposed. The method of calibrating a single six-port network by means of four standards is applied to calibrate the dual six-port network analyzer.2|38|6更新时间：2025-12-08
- 摘要：The principle of probing the ionospheric electron density profiles by the incoherent scatter method is discussed, and some typical photos, a signal power spectrum plot and two electron density profiles obtained in the experiment are presented.2|103|4更新时间：2025-12-08
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Multipole Expansion of Radiation and Scattering Fields for the Buried Object in the Stratified Media
摘要：With the normal and abnormal vector wave functions and their conversion relations, the multipole expansion expression of radiation and scattering fields for the buried object in the stratified media is presented. The result coincides with the formula derived by Prof. K. K. Mei, but the proving is simpler and more reasonable. This technique and computation can be applied to some other boundary value problems in which boundary conditions must be described with spherical and rectangular coordinates.3|55|4更新时间：2025-12-08 - 摘要：Till now, the theories of Microwave open resonators are almost to calculate the electrical parameters at resonace by assuming that the geometry of the cavity is given. In this paper, from the fundamental theory of microwave open resonators a simple and convenient inverse design method is proposed. Analytical formulae for calculating its geometrical parameters, as well as charts of the calculated results, are given.Calculated electrical properties for some high Q cavities designed by this method are in good agreement with those expected, and for medium Q cavity the results are within the accuracy of 10-2.2|92|1更新时间：2025-12-08
- 摘要：<正> 中国电子学会信息论学会委托西北电讯工程学院召开的全国首届密码学学术会议,于10月26日～29日在古城西安举行。来自全国各个地区的从事密码学研究的专家,教授和科学工作者共127人出席了会议。 这次会议,开得生动活跃。会议交流范围包括:保密体制和保密通信,公开密钥,M序列移位寄存器,2|12|0更新时间：2025-12-08
- 摘要：A grating with 1200 lines/mm has been fabricated by a diffraction grating ruling engine on the surface of a polished optical glass （ZF7） prism for the first time. This device is usually called prism-grating coupler. It has many novel characteristic, and the wave--guide mode can be effectively excited in the film even when the index of the film is higher than that of the prism.2|56|1更新时间：2025-12-08
- 摘要：A formula for evaluation of the Walsh spectrum of the Boolean difference of any Boolean function is given. Some interesting results show that some characters associated with an error are determined just by one row of the transform matrix numbered by the error itself.2|11|1更新时间：2025-12-08
- 摘要：Various coding schemes such as optimum linear predictors, adaptive quantizers, intraframe adaptive predictors, and intra-interframe adaptive predictors are compared by means of computer simulations. Subjective tests show that the adaptive predictor based on contour prediction improves considerably the prediction of resolution charts in comparison with the other intraframe coding schemes. For this adaptive predictor, 3.7 bits per sample of the luminance signal are required to get the studio picture quality by use of Huffman code.2|25|3更新时间：2025-12-08
- 摘要：A new method for establishing the Z domain equivalent model of a non-ideal op amp is presented. The Z domain transfer functions of non-ideal integrators based on the forward difference and the backward difference transformations are derived as two examples. Using this method, the computer simulation and the experimental verification of a typical decoupled biquad second-order bandpass SCF are conducted. This method can be extended to solve the design problems of many different kinds of high order SCF.2|98|4更新时间：2025-12-08
- 摘要：A technique is proposed for modification of logic functions in logic design i. e. a technique for the realization of a new function f using an existing function f. Practical examples show that this technique is Valuable for the design of combinational circuits to a certain extent. Furthermore, it is pointed out that various modification equations for logic functions correspond to various flip-flops respectively.2|50|18更新时间：2025-12-08
- 摘要：The hydrogen content in the silicon nitride films plasma-deposited at 20℃-560℃ has been determined by He-H elastic recoil detection technique combined with Rutherford Back Scattering and nuclear reaction 16O（d. p）17O. The effect of substrate temperature on hydrogen quantity, Si/N ratio in films, refractive index and density of films are presented. The correlation between the hydrogen content and BOE etch rate is given.2|85|3更新时间：2025-12-08
- 摘要：The pronounced fall-off of the current gain and the decrease of current gain with decreasing temperature in the low current range is caused by carrier tunnelling near the surface of the emitter-base junction, and occurs through the localized states within the bandgap when the surface of the emitter region and base region in the silicon planar transistor have a high surface impurity concentration or a high localized state density.4|27|0更新时间：2025-12-08
- 摘要：The advances of Robust detection in the last twenty years and the performances of various Robust detectors are reviewed. And the tendency of the current development is discussed.2|86|6更新时间：2025-12-08
- 摘要：The analytical methods of microstrip antenna elements and arrays are discussed, the forms and performances, design, technology and applications of microstrip antennas are also presented. At the end of this paper, some developing fields in the future are suggested briefly.2|152|4更新时间：2025-12-08
- 摘要：An empirical formula is given for the equation of the fundamental mode of an oft-used unilateral fin-line. The cutoff wave numbers of the fundamental mode and further the propagation constants can be calculated approximately by this formula. Agreement with previously published numerical data is better than 4.5% for oft-used unilateral fin-lines,2|47|1更新时间：2025-12-08
- 摘要：The concept oi R-type function and it’s construction rules are presented. The general method solving the parameters of the open-circuit impedances or short-circuit admittances is also given.3|64|3更新时间：2025-12-08
- 摘要：The characteristics of the electron gun with annular cathode are studied. In order to compare the schemes of design optimization for different applications, a general program for computer aided design is compiled and same typical examples are given.2|29|0更新时间：2025-12-08
- 摘要：Some experimental results of the proton isolation technology for the GaAs power MESFETs fabrication are reported. A fine thermal stability is found in the proton-isolated regions of FETs, and the data of the device reliability are given.2|16|0更新时间：2025-12-08
- 摘要：The design and performances of a wideband, high-gain and low-noise microwave solid-state limiting amplifier is described.2|44|0更新时间：2025-12-08
- 摘要：The relations among the band gap, conductive activation energy and the carbon content in the SP-a-SixC1 -x: H films are presented, together with the IR and XPS spectra and refractive index, and followed by some preliminary discussions of the obtained results.2|16|0更新时间：2025-12-08
- 摘要：<正> 中国电子学会计算机学会于今年10月8日至13日在烟台市召开了第三次全国数字系统设计自动化学术交流会。涉及逻辑模拟、测试诊断、布线布局、辅助设计和系统支撑等领域的112篇论文得到交流。两位代表在大会上介绍了1984年美国第21届DA会议和1984年第14届2|11|0更新时间：2025-12-08
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