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Proceedings of the IEEE

Issue 3 • Date March 1973

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Displaying Results 1 - 25 of 25
  • [Front cover and table of contents]

    Publication Year: 1973, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1973, Page(s): 259
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    Freely Available from IEEE
  • Relativistic theory of rotating disks

    Publication Year: 1973, Page(s):260 - 268
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (645 KB)

    The relationships between e, b, h, d in a rotating body are derived in the laboratory frame. They are utilized, together with suitable boundary conditions, to calculate the fields that arise when conducting or nonconducting bodies of revolution rotate in externally applied dc electric and magnetic fields. View full abstract»

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  • The viterbi algorithm

    Publication Year: 1973, Page(s):268 - 278
    Cited by:  Papers (2320)  |  Patents (289)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1057 KB)

    The Viterbi algorithm (VA) is a recursive optimal solution to the problem of estimating the state sequence of a discrete-time finite-state Markov process observed in memoryless noise. Many problems in areas such as digital communications can be cast in this form. This paper gives a tutorial exposition of the algorithm and of how it is implemented and analyzed. Applications to date are reviewed. In... View full abstract»

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  • High-power microwave tubes

    Publication Year: 1973, Page(s):279 - 280
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (237 KB)

    This short paper serves as an introduction to the four invited papers that follow it by describing their coverage and by commenting on recent trends in the design of microwave tubes for high-power applications. View full abstract»

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  • Helix and coupled-cavity traveling-wave tubes

    Publication Year: 1973, Page(s):280 - 298
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3130 KB)

    After 28 years of considerable research and development, two types of traveling-wave tube (TWT) circuits have captured the major portion of the production business. For broad-band applications, the helix is almost exclusively used, while for high-average-power applications, such as radar transmitters, the coupled cavity circuit has gained the ascendancy. Recent advances have been stimulated and su... View full abstract»

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  • High-power linear-beam tubes

    Publication Year: 1973, Page(s):299 - 330
    Cited by:  Papers (57)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4230 KB)

    High-power klystrons, coupled-cavity traveling-wave tubes (TWT's), and hybrid tubes, all of which utilize the microwave cavity as the basic circuit element, are described. These amplifiers are used in communications, radars, electronic countermeasures, and other applications at power levels from a few hundred watts to megawatts, at frequencies from ultrahigh frequency on up, and are particularly s... View full abstract»

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  • The continuous-cathode (emitting-sole) crossed-field amplifier

    Publication Year: 1973, Page(s):330 - 356
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2739 KB)

    The crossed-field amplifier (CFA) is an outgrowth of the magnetron. Several varieties exist including the forward-wave/ backward-wave types, and the injected-beam continuous-cathode (emitting-sole) types. Of these, the continuous-cathode type has found the most usage and has been established in many systems. Emphasis is placed upon this type. The CFA interaction process has similarities to a synch... View full abstract»

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  • High-power gridded tubes—1972

    Publication Year: 1973, Page(s):357 - 381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3380 KB)

    The technology described in this paper is intended to update the reader about the last decade of research and development in the field of high-power gridded tubes. Lower power level tubes are also discussed to serve as a foundation for the high-power tubes because they are generally used for drive stages. Special emphasis is placed on the development of a new generation of high-power gain-high fre... View full abstract»

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  • Liquid-crystal bar-graph displays

    Publication Year: 1973, Page(s):384 - 385
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    Analog displays using the twisted-nematic mode have been constructed. Histogram or multibar displays are demonstrated. Within each bar, a narrow rectangular "vane" moves in response to analog voltages. These reflective displays offer low vane-width, sharp vane edges, and a highly legible white-on-black or black-on-white readout. View full abstract»

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  • Integral heat-sink IMPATT diodes fabricated using p+etch stop

    Publication Year: 1973, Page(s):385 - 386
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The problems in batch fabrication of integral heat-sink IMPATT diodes are greatly simplified through a newly developed preferential etching technique. Devices fabricated utilizing the new technique have thermal resistance (θjc) values of 17-20°C/W for an active area of 2 × 10-4cm2. View full abstract»

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  • Stability of time-varying combined pulse-modulated control systems

    Publication Year: 1973, Page(s):386 - 387
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (197 KB)

    A stability criterion is derived for combined pulse-modulated control systems, with time-varying linear plants. The condition guarantees boundedness in the L1(-∞, ∞) sense. View full abstract»

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  • Second-order approximation of the autocorrelation matrix function

    Publication Year: 1973, Page(s):387 - 388
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (197 KB)

    A second-order approximation to the autocorrelation matrix of a nonlinear transformation is presented and its use is illustrated on two examples. One example discusses the correction of the automatic gain control (AGC) effect in monopulse radar receivers. View full abstract»

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  • On combined frequency oscillations of the forced Van der Pol oscillator

    Publication Year: 1973, Page(s):388 - 389
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    New results pertaining to combined frequency oscillations of the forced Van der Pol oscillator are derived. Conditions are given on the degree of detuning for which the results are valid. The results obtained are related to those obtained by Adler and Cartwright. Adler's equation is generalized and Cartwright's qualitative result relating to "line drifts" is quantified. View full abstract»

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  • Sensitivity of the performance of optimal stochastic systems

    Publication Year: 1973, Page(s):389 - 390
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Sensitivities of cost of an optimal nondeterministic system with noise-corrupted measurements are compared. It is shown that closed-loop realization of optimal control gives lower sensitivity than an open-loop realization. View full abstract»

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  • Two new direct-coupled astable multivibrators

    Publication Year: 1973, Page(s):390 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (190 KB)

    New direct-coupled astable multivibrators are introduced in which the collectors and the bases of both emitter-bias transistors are directly coupled to each other. They may be considered to be a modification of the direct-coupled bistable circuit. The switching action takes place by means of a capacitor in each emitter circuit. Triangular waves are generated at the transistor emitters. View full abstract»

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  • Harmonic analysis via Kalman filtering technique

    Publication Year: 1973, Page(s):391 - 392
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (181 KB)

    A recursive computer method for harmonic analysis of a noisy periodic signal is presented. It is shown that with a suitable model for harmonic coefficients, a simple application of Kalman filtering technique can yield minimum variance estimates of the coefficients. The proposed method is illustrated with the help of simulation results. View full abstract»

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  • Second breakdown of transistors during inductive turnoff

    Publication Year: 1973, Page(s):393 - 395
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    During turnoff, current is localized to the center of the emitter stripe of a transistor. Depending on the magnitude of reverse base current and device parameters, the current density can reach levels which trigger avalanche injection. A simple model is presented which describes this effect and shows good agreement with measurements. View full abstract»

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  • High-frequency noise in Schottky-barrier diodes

    Publication Year: 1973, Page(s): 393
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (123 KB)

    A unified equivalent noise temperature equation is presented which relates the high-frequency noise in Schottky-barrier diodes to the barrier transport mechanism. View full abstract»

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  • The inner formulation for the total square integral (SUM)

    Publication Year: 1973, Page(s):395 - 397
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB)

    In this letter the value of the complex integrals InΔ 1/2πj ∫-j∞j∞G(s)G(-s)ds and In=1/2πj ∮unit circleF(z)F(z-1)z-1dz which arise in obtaining the total square integral for the continuous case and the total square sum for discrete case are obtained in a unified approach based in the... View full abstract»

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  • Correction to "Measured performance of a sequential two-step detection scheme"

    Publication Year: 1973, Page(s): 395
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  • Pulse avalanche diode oscillators with an injected CW signal

    Publication Year: 1973, Page(s):397 - 398
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (298 KB)

    The primary physical parameters affecting the frequency of pulsed avalanche diode oscillators (PAO) are discussed. A simplified equation, describing the interaction of an injected CW signal with the signal generated in the pulsed oscillator, is presented and the results of numerical calculations are plotted. It is shown that the oscillator frequency is merely pulled by the injected CW signal and t... View full abstract»

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  • Response curve shaping of coupled dielectric resonators

    Publication Year: 1973, Page(s):398 - 399
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (282 KB)

    Using parallel coupled strontium titanate resonators, we have produced a small 9-GHz bandpass filter, having a lower skirt steepness of 27 MHz per 30 dB of attenuation. Approximate simplified design equations for two relative dielectric constants are also presented. View full abstract»

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  • The performance of GaAs field-effect transistors as microwave mixers

    Publication Year: 1973, Page(s):399 - 400
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (206 KB)

    The performance of Schottky barrier gate field-effect transistors (FET's) as single-ended microwave mixers at 3 GHz is described. An increase in dynamic range of approximately 10 dB over conventional diode mixers is reported although the noise figures of FET miters at present are higher than for diode mixers. View full abstract»

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  • [Back cover]

    Publication Year: 1973, Page(s): c4
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    Freely Available from IEEE

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North Carolina State University