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IEEE Transactions on Microwave Theory and Techniques

Issue 8 • Date Aug. 1983

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Displaying Results 1 - 18 of 18
  • [Front cover - Aug. 1983 Transactions]

    Publication Year: 1983, Page(s):f1 - f2
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  • Modulation Schemes in Low-Cost Microwave Field Sensors

    Publication Year: 1983, Page(s):613 - 624
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1330 KB)

    The use of modulation schemes in short-range microwave field sensors are discussed and in particular the ideas are applied to low-cost self-detecting doppler sensors based on a two-terminal negative resistance diode oscillator which acts as a load variation detector. FM-CW and pulse modulation techniques are described which can lead to improved performance in these sensors, and experimental result... View full abstract»

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  • Measurement and Modeling of the Apparent Characteristic Impedance of Microstrip

    Publication Year: 1983, Page(s):624 - 632
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (937 KB)

    Voltage and current cannot be defined uniquely for microstrip except at zero frequency, and therefore microstrip has not been rigorously incorporated into circuit theory. However, in engineering practice, micro-strip exhibits an apparent characteristic impedance, denoted here by ZA, that can be measured. Three methods of measuring ZA were devised and used in measuring three impedance levels of mic... View full abstract»

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  • An Analytic Approach to Optimum Oscillator Design Using S-Parameters

    Publication Year: 1983, Page(s):633 - 639
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (843 KB)

    An analytic approach to the design of microwave FET oscillators for maximum power output into a given load is presented. By the use of FET S-parameters, characterized as a function of incident input powers, design information can he obtained for any standard topology. By means of this technique, an experimental 5.3-GHz oscillator has been demonstrated which delivers 245 mW at 35-percent efficiency... View full abstract»

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  • An Iterative Extended Boundary Condition Method for Solving the Absorption Characteristics of Lossy Dielectric Objects of Large Aspect Ratios

    Publication Year: 1983, Page(s):640 - 647
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1065 KB)

    The recently developed iterative extended boundary condition method (IEBCM) has been used to compute the internal fields induced in homogeneous, axisymmetric, lossy dielectric objects of large aspect ratios when exposed to incident planewave radiation. Calculations were made for both the E- and k-polarization cases. The computed results for a prolate spheroidal model of an average man are found to... View full abstract»

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  • Coupling Characteristics of Nonradiative Dielectric Waveguides

    Publication Year: 1983, Page(s):648 - 654
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (793 KB)

    An analytical method is presented for predicting coupling characteristics of dielectric strips in the nonradiative dielectric waveguide. Starting with an approximate but very accurate expression for the coupling coefficient between parallel dielectric strips, the scattering coefficients for nonuniform coupling structures are derived in simple closed-form expressions by taking the effect of the fie... View full abstract»

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  • A Compact Septum Polarizer

    Publication Year: 1983, Page(s):654 - 660
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (642 KB)

    A waveguide polarizer with resonant notches in a septum is investigated. The Wiener-Hopf techniques employed to derive theoretical design data and the results are compared to experiments for a single-notch and a double-notch design. It is concluded that the agreement is good and the design useful for narrowband applications. View full abstract»

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  • On Noise in Distributed Amplifiers at Microwave Frequencies

    Publication Year: 1983, Page(s):661 - 668
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (758 KB)

    Formulas for the noise figure, and the minimum noise figure of a multi-link distributed amplifier have been developed. In addition, a relatively simple approximation formula has been devised that predicts the minimum noise figure of a practical amplifier design with good accuracy up to frequencies of 9 GHz. Finally, after the dependence of the noise characteristics on the circuit parameters is dis... View full abstract»

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  • Scattering Matrix Description of Microwave Resonators

    Publication Year: 1983, Page(s):669 - 671
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (271 KB)

    In this paper an analysis of the scattering matrix coefficients (reflectance and transmittances) of the microwave resonators is presented. Two general cases of resonator couplings are considered. One of them is a multiport with one port terminated by the resonator, the other is a resonator coupled, in various ways, to a number of transmission lines. The effect of external circuits on the Q and res... View full abstract»

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  • Performance of Microstrip Couplers on an Anisotropic Substrate with an Isotropic Superstrata

    Publication Year: 1983, Page(s):671 - 674
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    The directivity of microstrip couplers on anisotropic substrates can be improved substantially by adding an isotropic superstrata layer above the microstrips. The necessary dimensions of the layer can be chosen so that fabrication is simple and noncritical. View full abstract»

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  • Optimum Design of 3-Db Branch-Line Couplers Using Microstrip Lines

    Publication Year: 1983, Page(s):674 - 678
    Cited by:  Papers (58)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (615 KB)

    A computer-aided design is described that makes it possible to reduce the internal impedance levels of branch-line couplers so that they may be physically constructed by microstrip lines, where the Fletcher-Powell search method has been used to optimize the design. Because microstrip lines are severely restricted in their usable impedance range, the 3-dB couplers presented here should be useful fo... View full abstract»

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  • Characteristic Impedance of an Oval Located Symmetrically Between the Ground Planes of Finite Width

    Publication Year: 1983, Page(s):678 - 681
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (427 KB)

    A conformal transformation for the analysis of a transmission line with an oval-shaped center conductor symmetrically placed between two finite ground planes is developed. The formulation is used to calculate the characteristic impedances of oval, elliptic, circular, and planar conductors placed midway between the finite ground planes. The results on impedance are presented for various values of g... View full abstract»

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  • Spectral Domain Anaiysis of Interacting Microstrip Resonant Structures

    Publication Year: 1983, Page(s):681 - 685
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (483 KB)

    An analysis of the interacting microstrip resonant structures, namely, the half-wave coupled and the quarter-wave coupled rectangular microstrip resonators is performed with the hybrid-mode formulation of the spectral domain technique. The resonant frequencies in the even and odd resonance modes are evaluated from the numerical solution of the characteristic equation. Results agree within +-1.5 pe... View full abstract»

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  • An Accurate Bivariate Formulation for Computer-Aided Design of Circuits Including Mlcrostrip

    Publication Year: 1983, Page(s):685 - 687
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (355 KB)

    An accurate and fast bivariate interpolation technique is used to compute the microstrip parameters at an arbitrary frequency and of any strip width. This technique allows computation of the effective dielectric constant, characteristic impedance, dielectric loss, and the conductor loss of microstrip in a time appropriate for computer-aided design application. By combining interpolation techniques... View full abstract»

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  • A Technique for Measuring the Effective Dielectric Constant of a Mlcrostrip Line

    Publication Year: 1983, Page(s):687 - 688
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    A method is discussed by which the effective dielectric constant of a transmission line of complex cross section is determined experimentally. View full abstract»

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  • Patent abstracts

    Publication Year: 1983, Page(s):689 - 693
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    These patent abstracts of recently issued patents of interest to microwave engineers are intended to provide the minimum information necessary for readers to detennine if they are interested in examining the patent in more detail. Complete copies of patents are available for a small fee by writing: U.S. Patent and Trademark Office, Box 9, Washington, DC, USA. View full abstract»

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  • [Advertisement]

    Publication Year: 1983, Page(s): 694
    Request permission for commercial reuse | PDF file iconPDF (344 KB)
    Freely Available from IEEE
  • [Back cover - Aug. 1983 Transactions]

    Publication Year: 1983, Page(s):b1 - b2
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    Freely Available from IEEE

Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

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Meet Our Editors

Editor-in-Chief
Dominique Schreurs
Dominique.Schreurs@ieee.org

Editor-in-Chief
Jenshan Lin
jenshan@ieee.org