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Proceedings of the IEEE

Issue 2 • Feb. 1988

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Displaying Results 1 - 9 of 9
  • Magnitude locked loop

    Publication Year: 1988, Page(s):201 - 203
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    A control loop which maintains constant the magnitude of a transfer function is proposed. This loop is named the magnitude-locked loop (MLL). It is shown that it can perform most of the functions of the phase-locked loop. Several configurations can be chosen for the transfer function. The best, selected for its minimization of error, is presented.<> View full abstract»

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  • An overview of electromagnetic and spin angular momentum mechanical waves in ferrite media

    Publication Year: 1988, Page(s):138 - 150
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    The principal characteristics of gyromagnetic materials that are useful for microwave applications are reviewed, and both the large-signal and small-signal models that govern wave propagation at microwave frequencies are given. Uniform and nonuniform plane waves in an unbounded ferrite medium are considered from the complementary viewpoints of electromagnetics and mechanics. Both electromagnetic a... View full abstract»

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  • A generation of microwave ferrite devices

    Publication Year: 1988, Page(s):121 - 137
    Cited by:  Papers (37)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1468 KB)

    The development of microwave ferrite materials and devices over the last thirty years is traced. The status of materials, devices, and theoretical understanding prevalent in the mid-1950s is first reviewed. Developments in materials engineering of garnets and lithium ferrites in the 1960s and 1970s are described, along with the evolution of circulators and phase shifters. Current levels of perform... View full abstract»

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  • Maximum likelihood array processing for the estimation of superimposed signals

    Publication Year: 1988, Page(s):203 - 205
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    An efficient algorithm for computing the maximum-likelihood estimates of multiple signals observed by an array of sensors is presented. The algorithm provides estimates of parameters related to the directional patterns of the sources as well as estimates of the location parameters of the sources. Furthermore, the algorithm is equally applicable to wideband sources and narrowband sources and does n... View full abstract»

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  • Ferrite films for microwave and millimeter-wave devices

    Publication Year: 1988, Page(s):151 - 158
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    For microwave and millimeter-wave applications, there is increasing interest in using films rather than bulk ferrites. In some cases, such as magnetostatic wave devices, films provide definite performance advantages. In other cases, films may provide lower cost, smaller size, and enhanced compatibility with planar circuit designs such as monolithic microwave integrated circuits (MMIC). The author ... View full abstract»

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  • The generalized eigenproblem: pole-zero computation

    Publication Year: 1988, Page(s):103 - 120
    Cited by:  Papers (34)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1452 KB)

    A modification-decomposition (MD) method is used to compute linear system transfer function poles and zeros by transforming an N-dimensional generalized eigenvalue problem to an M-dimensional standard eigenvalue problem with M⩾ r, where r is the lesser of the ranks of the dynamic or nondynamic component matrix of the system. Hence, network eigenvalu... View full abstract»

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  • Analog signal processing with microwave magnetics

    Publication Year: 1988, Page(s):159 - 170
    Cited by:  Papers (56)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1392 KB)

    The main performance advantage that analog signal-processing devices have over their digital competitors is the ability to operate with wide instantaneous bandwidths and moderately high dynamic ranges at microwave frequencies. Here, applications of magnetostatic wave (MSW) devices that capitalize on these advantages are reviewed. The first area is broadband microwave receivers, which includes freq... View full abstract»

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  • Magnetostatic wave technology: a review

    Publication Year: 1988, Page(s):171 - 187
    Cited by:  Papers (159)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1504 KB)

    Magnetostatic wave (MSW) technology has been under investigation for more than a decade. Using ferrimagnetic films such as liquid-phase epitaxial (LPE) yttrium iron garnet (YIG) films, MSW devices and subsystems offer instantaneous bandwidths of up to 1 GHz at operating frequencies in the microwave bands (0.5-26.5 GHz). Because MSWs travel with velocities two-to-four orders of magnitude slower tha... View full abstract»

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  • Circulators for microwave and millimeter-wave integrated circuits

    Publication Year: 1988, Page(s):188 - 200
    Cited by:  Papers (42)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    The requirements for circulators for use in combination with microwave and millimeter-wave integrated circuits are reviewed, with special emphasis on modules for phased-array antennas. Recent advances in broadbanding and in miniaturization are summarized. Novel types of circulators that are fabricated by attaching a ferrite disc and a suitable coupling structure to the surface of a dielectric of s... View full abstract»

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The most highly-cited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics.

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H. Joel Trussell
North Carolina State University