Proceedings of the IEEE

Issue 12 • Dec. 1972

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Displaying Results 1 - 16 of 16
  • [Front cover and table of contents]

    Publication Year: 1972, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1972, Page(s): 1469
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  • A sampling FM wide-band demodulator useful for laser Doppler velocimeters

    Publication Year: 1972, Page(s):1470 - 1475
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1871 KB)

    A sampling FM demodulator of large bandwidth, consisting of a swept filter and an oscilloscope, is described. The sampled FM function is reconstructed and displayed on an oscilloscope. For a detection bandwidth of 100 MHz and a spectral resolution of 3 MHz (3 percent) the temporal resolution is as high as dv/dt = 1014s-2= 100 MHz/µs in the case of a periodic modulation s... View full abstract»

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  • Electrodynamics of anisotropic media with space and time dispersion

    Publication Year: 1972, Page(s):1475 - 1485
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (916 KB)

    The average stress tensor, power-flow density, momentum density, and energy density for electromagnetic waves in a linear stationary anisotropic medium with space and time dispersion are clarified with the help of the second-order nonlinear terms in the equation of motion for polarization. The wave fields are connected with the medium-mass motion through the nonlinear terms; the net force between ... View full abstract»

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  • The GaAs traveling-wave amplifier as a new kind of microwave transistor

    Publication Year: 1972, Page(s):1486 - 1502
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2110 KB)

    A versatile solid-state microwave amplifier has evolved from a combination of transistor mechanisms and the transferred-electron effect. The prototype device, called a "traveling-wave transistor," employs a 2-µm layer of n-type GaAs grown epitaxially on a semi-insulating substrate. A transistor-like input launches a traveling space-charge wave that grows exponentially as it moves along the su... View full abstract»

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  • A microwave network formalism for acoustic waves in isotropic media

    Publication Year: 1972, Page(s):1503 - 1512
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1113 KB)

    Motivated by recent developments in acoustic surface waves, a new approach is presented for the systematic analysis and description of acoustic wave phenomena in isotropic solids. This approach employs certain microwave network techniques developed in the context of electromagnetic waveguides. Acoustic wave structures are viewed as being composed of constituent waveguide regions coupled by junctio... View full abstract»

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  • Catalog of acoustic equivalent networks for planar interfaces

    Publication Year: 1972, Page(s):1513 - 1518
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (459 KB)

    Rigorous equivalent networks are presented in catalog form for a large variety of planar acoustic interfaces between two media. Although these networks are phrased in electrical terms, involving voltage and current and lumped electrical elements, there is nothing electrical in them. The circuits are purely acoustic in content but electrical in form. These networks are consistent with the microwave... View full abstract»

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  • Considerations in the design of drive systems for on-the-road electric vehicles

    Publication Year: 1972, Page(s):1519 - 1533
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1495 KB)

    The energy and power requirements of a class of on-the-road electric vehicles are developed, and acceleration and speed characteristics of such vehicles in urban traffic are discussed. Curves of average speed under different conditions of traffic are presented, as are curves of average power required during acceleration, average power required during cruising, and peak power required. A dc drive s... View full abstract»

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  • Large-signal noise, frequency conversion, and parametric instabilities in IMPATT diode networks

    Publication Year: 1972, Page(s):1534 - 1548
    Cited by:  Papers (48)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1718 KB)

    A theoretical treatment is presented of some of the nonlinear properties of the IMPATT or Read avalanche diode, a negative-resistance semiconductor device that is now coming into wide-spread use for microwave oscillators and power amplifiers. Based upon the somewhat idealized Read model, this theory presents a qualitatively meaningful explanation of certain "parametric" effects that are often trou... View full abstract»

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  • An initialization technique for improved MTI performance in phased array radars

    Publication Year: 1972, Page(s):1551 - 1552
    Cited by:  Papers (26)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (214 KB)

    A technique is described for employing recursive digital moving-target-indicator (MTI) filters in phased array radars without the undesirable transient effects normally encountered in these filters. View full abstract»

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  • Backscattering from a circular loop of wire

    Publication Year: 1972, Page(s):1552 - 1554
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    The geometrical theory of diffraction by a curved wire is used to calculate the backscattered field from a circular loop of wire at oblique incidence. The scalar cases of hard and soft wires and the electro-magnetic cases of horizontal and vertical polarization are treated. Graphs of the back-scattered amplitude versus angle of incidence are given for ka = 1, 2, . . ., 9 where k is the propagation... View full abstract»

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  • A generalized version of the sampling theorem

    Publication Year: 1972, Page(s):1554 - 1555
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (189 KB)

    The sampling theorem states that any strictly band-limited signal can be exactly reconstructed from its sample values. This situation is generalized in two directions: signals are considered which are not strictly band-limited and it is supposed that the samples are subject to a certain distortion before being used for signal reconstruction. View full abstract»

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  • Experimental observation of the dependence of avalanche noise on carrier ionization coefficients

    Publication Year: 1972, Page(s):1555 - 1556
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB)

    McIntyre has predicted that avalanche noise is strongly dependent on the ionization coefficients of the carriers initiating the avalanche process. Carriers with lower ionization coefficient produce higher avalanche noise. The experimental results described here confirm the theoretical prediction that in silicon, where the ionization coefficient of holes is an order of magnitude smaller than the io... View full abstract»

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  • Asynchronous operation of an analog convolver

    Publication Year: 1972, Page(s):1556 - 1557
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (534 KB)

    A surface-acoustic-wave convolver can correlate a signal waveform by using an appropriate reference only if the signal arrives within a small time range related to the propagation delay in the device. It is shown here that the complete correlation function can be obtained for arbitrary signal timing if the reference waveform is made repetitive. View full abstract»

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  • Interpolation using the fast Fourier transform

    Publication Year: 1972, Page(s): 1558
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (141 KB)

    The fast Fourier transform (FFT) algorithm has had widespread influence in many areas of computation since its "rediscovery" by Cooley and Tukey [1]. An efficient and accurate method for interpolation of functions based on the FFT is presented. As an application, the generation of the characteristic polynomial in the "generalized eigenvalue problem" [2] is considered. View full abstract»

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  • [Back cover]

    Publication Year: 1972, Page(s): c4
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    Freely Available from IEEE

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North Carolina State University