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IEEE Transactions on Microwave Theory and Techniques

Issue 9 • Sep. 1985

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  • [Front cover - Sep. 1985]

    Publication Year: 1985, Page(s):f1 - f2
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1985, Page(s): i
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  • 1.5-GHz GaAs Surface Acoustic Wave Delay Lines (Short Paper)

    Publication Year: 1985, Page(s):824 - 827
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Surface acoustic wave (SAW) delay Iines fabricated on commercially available View full abstract»

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  • Patent Abstracts (Sep. 1985 [T-MTT])

    Publication Year: 1985, Page(s):840 - 842
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  • Congressional Fellowships

    Publication Year: 1985, Page(s): 843
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  • Call for Papers (Sep. 1985 [T-MTT])

    Publication Year: 1985, Page(s): 844
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  • [Back cover - Sep. 1985 [T-MTT]]

    Publication Year: 1985, Page(s):b1 - b2
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  • Dynamic Three-Dimensional TLM Analysis of Microstriplines on Anisotropic Substrate

    Publication Year: 1985, Page(s):789 - 799
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    The frequency-dependent propagation characteristics of a hybrid mode along microstriplines on anisotropic substrates are presented for the case where the constitutive parameter tensors maybe diagonalized. A generalization of the three-dimensional transmission-line-matrix (TLM) numerical procedure is used to obtain results for the phase constant Beta, effective permittivity epsiloneff, a... View full abstract»

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  • Transmission Matrix Representation of Finline Discontinuities

    Publication Year: 1985, Page(s):765 - 770
    Cited by:  Papers (86)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A general treatise of cascaded discontinuities in inhomogeneous waveguides is given and applied to finline circuits. A transmission matrix representation is superior to a scattering matrix representation as far as CPU time is concerned. The scattering matrix is, however, advantageous if the sum of the line lengths separating the discontinuities is large. Numerical examples are given in order to il... View full abstract»

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  • The Dominant Mode Properties of Open Groove Guide: An Improved Solution

    Publication Year: 1985, Page(s):755 - 764
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    Groove guide, one of several low-loss waveguides proposed some years ago for use at millimeter wavelengths, is again receiving attention in the literature. A new transverse equivalent network and dispersion relation for the properties of the dominant mode are presented here which are extremely simple in form and yet very accurate. Comparisons with accurate published measurements indicate better ag... View full abstract»

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  • New Phase-Lock Loop Circuit Providing Very Fast Acquisition Time

    Publication Year: 1985, Page(s): 747
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    We present a new circuit configuration for second-order phase-lock loops that provides, for large initial frequency offsets, acquisition times several orders of magnitude shorter than those achieved using conventional phase-lock loops. This new circuit also provides frequency locking almost instantaneously when the time delay around the loop is small. Furthermore, it can, without losing lock, sust... View full abstract»

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  • Complex Permittivity Instrumentation for High-Loss Liquids at Microwave Frequencies (Short Paper)

    Publication Year: 1985, Page(s):822 - 824
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    This note draws attention to the fact that the instrumentation system for the measurement of the complex permittivity of high-loss liquids proposed by Zanforlin can be improved so as to i) increase the sensitivity and stability of the demodulation process, ii) make the demodulation accurately linear rather than approximately square law, and iii) improve the degree of bridge balance and stability. View full abstract»

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  • Transverse Modal Analysis of Printed Circuit Transmission Lines

    Publication Year: 1985, Page(s):808 - 816
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    Dispersion characteristics of finned rectangular waveguides, finlines, shielded slotlines, shielded microstrip and striplines, and shielded two-coupled slotlines and striplines are formulated by the transverse modal analysis method. A rectangular cavity is formed by placing two electric walls transverse to a uniform transmission-line system. Considering that the wave propagation is in the directio... View full abstract»

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  • Optical Effects on the Static and Dynamic Characteristics of a GaAs MESFET (Short Paper)

    Publication Year: 1985, Page(s):819 - 822
    Cited by:  Papers (32)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    In this paper, we describe the effect of light on the S-parameters of a GaAs MESFET. The photon energy is greater than the gap bandwidth of the semiconductor. The photoconductive and photovoltaic dc phenomena in the channel and in the depletion layer are theoretically analyzed with a unidimensional model to describe the light effect on the dc transconductance gm. The comparison between ... View full abstract»

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  • Waveguide Modes Via an Integral Equation Leading to a Linear Matrix Eigenvalue Problem (Correction)

    Publication Year: 1985, Page(s): 839
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    After having examined the above paper, we noticed that the symbol of principal value in integral is inappropriate. In fact, integral can represent the field on sigma only in the limit as the observation point approaches sigma. This oversight, however, does not affect the theory at all. View full abstract»

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  • Computation of the Parallel-Plate Capacitor with Symmetrically Placed Unequal Plates

    Publication Year: 1985, Page(s):800 - 807
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The classical problem of the parallel-plate capacitor has been investigated by a number of authors, including Love and Langton; the latter gives good results that are still not complete as claimed. In this paper, the constants occurring in the Schwarz-Christoffel equations are correctly related to the dimensions of the capacitor. The electric intensity is studied and four typical values are given ... View full abstract»

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  • Quasi-Static Characteristics of Asymmetrical and Coupled Coplanar-Type Transmission Lines

    Publication Year: 1985, Page(s):771 - 778
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    In this paper, variational expressions for the capacitances of' asymmetrical and coupled coplanar-type transmission lines are derived. The methods employed are quite general, and are useful for analyzing various types of coplanar-type transmission lines, with either an isotropic or anisotropic substrate. An accurate and efficient method of calculation is provided for the variational expressions, a... View full abstract»

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  • Planar Millimeter-Wave Diode Mixer (Short Paper)

    Publication Year: 1985, Page(s):827 - 830
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    A new mixer has been built, using a planar GaAs Schottky-barrier diode, for operation at frequencies around 100 GHz. The mixer has low noise temperature and conversion loss and low local oscillator power requirement. The design is such that construction of scaled versions should he possible for operation up to 200 GHz. View full abstract»

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  • Domain Approach for Continuous Spectrum of Slot-Like Transmission Lines (Short Paper)

    Publication Year: 1985, Page(s):817 - 818
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    For the first time, the continuous spectrum part of slot-like transmission Iines is described using the spectral-domain approach which has been successfully applied to the discrete part. Reliability of the approach is checked by numerical calculation of the surface current distribution across the slot plane in a simple illustrative example. View full abstract»

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  • A Method for Dielectric Loss Measurements by a Microwave Cavity in Fixed Resonance Condition

    Publication Year: 1985, Page(s):779 - 783
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A method for the measurement of dielectric losses at microwave frequencies for small samples inserted in a resonating cavity is discussed. The method allows static and dynamic determinations of epsilon" by power reflection coefficient measurements in resonance condition and is suitable for experimental setup that use either active or passive frequency techniques. An X-band microwave apparatus base... View full abstract»

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  • Scattering at an N-Furcated Parallel-Plate Waveguide Junction (Short Paper)

    Publication Year: 1985, Page(s):830 - 835
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Using the conservation of complex power technique (CCPT), this paper presents a solution to the problem of EM scattering at the junction of a parallel-plate waveguide and an N-furcated parallel-plate waveguide with arbitrarily spaced thick septa. Although this junction can be regarded as an (N + 1)-port configuration, the problem is formulated so that it is viewed mathematically as a generalized 2... View full abstract»

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  • Longitudinal and Transverse Current Distributions on Microstriplines and Their Closed-Form Expression

    Publication Year: 1985, Page(s):784 - 788
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Simple but accurate closed-form expressions for the normalized longitudinal and transverse current distributions on microstriplines are derived by rising the charge conservation formula and the charge distributions calculated by the Green's function technique. Their dependence on both the relative permittivity of the substrate epsilon* and the shape ratio w/h are explained, and the results are com... View full abstract»

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  • Microstrip Transmission Line with Finite-Width Dielectric and Ground Plane (Short Paper)

    Publication Year: 1985, Page(s):835 - 839
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Design data for microstrip transmission lines with finite-width dielectric and ground plane are presented. The characteristic impedance and velocity of propagation are tabulated from results of a moment-method solution of a quasi-TEM transmission-line model of this microstrip structure. View full abstract»

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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
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt