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IEEE Transactions on Microwave Theory and Techniques

Issue 9 • Sep. 1981

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Displaying Results 1 - 25 of 26
  • [Front cover - Sep. 1981]

    Publication Year: 1981, Page(s):f1 - f2
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    Freely Available from IEEE
  • Guidance and Leakage Properties of a Class of Open Dielectric Waveguides: Part I - Mathematical Formulations

    Publication Year: 1981, Page(s):843 - 855
    Cited by:  Papers (196)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1521 KB)

    A class of open dielectric waveguides is discussed which is of direct importance to the areas of integrated optics and millimeter-wave integrated circuits. An accurate analysis of the properties of these waveguides reveals that interesting new physical phenomena, snch as leakage and sharp cancellation or resonance effects, may occur under appropriate circumstances. The resulting leaky modes form a... View full abstract»

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  • Guidance and Leakage Properties of a Class of Open Dielectric Waveguides: Part II - New Physical Effects

    Publication Year: 1981, Page(s):855 - 869
    Cited by:  Papers (101)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1913 KB)

    A class of open dielectric waveguides is discussed which is of direct importance to the areas of integrated optics and millimeter-wave integrated circuits. An accurate analysis of the properties of these waveguides reveals that interesting new physical phenomena, such as leakage and sharp cancellation or resonance effects, may occur under appropriate circumstances. The resulting leaky modes form a... View full abstract»

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  • Patent abstracts

    Publication Year: 1981, Page(s):990 - 996
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (459 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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  • [Back Cover - Sep. 1981]

    Publication Year: 1981, Page(s): b1
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    Freely Available from IEEE
  • A Generalized Two-Dimensional Coupled-Mode Analysis of Curved and Chirped Periodic Structures in Open Dielectric Waveguides

    Publication Year: 1981, Page(s):881 - 891
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    A generalized two-dimensional coupled mode analysis of curved and chirped quasi-periodic structures in planar dielectric waveguides has been formulated. This analysis can be used to design curved and chirped quasi-periodic stuctures for obtaining phase matched interaction between two specific guided-wave beams. Alternatively, it can be used to calculate the amplitude and the phase of the diffracte... View full abstract»

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  • Coupling Characteristics of Planar Dielectric Waveguides of Rectangular Cross Section

    Publication Year: 1981, Page(s):875 - 880
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    An approximate analytical method based on experimental results for predicting the coupling characteristics of various coupling structures is described. Expressions for the propagation constants were derived using the generalized effective dielectric constant method. For nonsymmetric coupling structures, the theoretical coupling coefficients were modified by a correction factor. Comparisons between... View full abstract»

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  • Millimeter-Wave Dielectric Image Line Detector-Circuit Employing Etched Slot Structure

    Publication Year: 1981, Page(s):953 - 957
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    In an earlier paper [1] slots in the ground plane are investigated as new circuit elements in dielectric image lines. In this paper slots in dielectric image lines employing metallized dielectric substrates as the ground plane are investigated. It is shown that this configuration can be used to realize truly integrated dielectric image line semiconductor circuits. As an example the design and perf... View full abstract»

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  • Millimeter-Wave Passive Components and Six-Port Network Analyzer in Dielectric Waveguide

    Publication Year: 1981, Page(s):948 - 953
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    A cost effective scheme of fabricating millimeter-wave passive components in dielectric waveguide has been conceived and a computer program has been written for analyzing their frequency responses. By inlaying Teflon guides in the properly designed contours cut in a low dielectric constant foam material, passive components such as quadrature hybrids, in-phase power dividers, and six-port network a... View full abstract»

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  • A Hybrid Method for Paraxial Beam Propagation in Multimode Optical Waveguides

    Publication Year: 1981, Page(s):923 - 933
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    A hybrid (nonray, nonmodal) method for computing the fields of a paraxial beam propagating in a multimode waveguide (parallel-plate or dielectric slab) at large axial distances is presented. The method is based on the Fourier and Fresnel self-imaging properties of these waveguides, and is capable of high accuracy. The method is much more efficient than ray or mode approaches, while giving complete... View full abstract»

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  • Foreword, Sep. 1981

    Publication Year: 1981, Page(s):841 - 842
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Electromagnetic wave guiding and transmission are an integral part of microwave, rnillimeter-wave, and optical systems. Passive components can be made with particular waveguide or transmission-line configurations and active components can be realized by installing solid-state devices in them. To design passive and active components, characteristics of related waveguiding structures must be clearly... View full abstract»

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  • A Quasioptical Circuit Technology for Shorttillimeter-Wavelength Multiplexer

    Publication Year: 1981, Page(s):897 - 905
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1336 KB)

    This paper describes constructions and electrical performances of shortmillimeter-wavelength quasioptical passive circuits using the Gaussian beam mode, i.e., beam mode Iaunchers, polarization-independent beam splitters, circular polarization duplexers, filters, diplexers, and multiplexer. The diplexers were devised to handle wide bandwidths with fairly low loss and to have a sharp cutoff response... View full abstract»

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  • Fundamental Considerations in Miuimeter and Near-Millimeter Component Design Employing Magnetoplasmons

    Publication Year: 1981, Page(s):916 - 923
    Cited by:  Papers (36)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    The feasibility of using surface magnetoplasmons on semiconducting substrates to obtain circuit functions which match those of ferrite loaded devices at lower frequencies, is investigated. This article describes some initial results obtained in our study of performance characteristics using the best loss parameters available for GaAs materials. Canonical models are considered which relate directly... View full abstract»

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  • Aperture Coupling Between Dielectric Image Lines

    Publication Year: 1981, Page(s):891 - 896
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    Aperture coupling between dielectric image lines is used develop a design technique for directional couplers at millimeter-wave frequencies. Expressions for coupling coefficients and directivity, employing coupling between image lines through apertures in the common ground plane are developed. The design procedure is illustrated by application 10-, 20-, and 30-dB directional couplers in rectangula... View full abstract»

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  • Millimeter-Wave InP Image Line Self-Mixing Gunn Oscillator

    Publication Year: 1981, Page(s):958 - 961
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Indium Phosphide Gunn Diodes have been used to develop self -mixing oscillators in the 60-GHz region using dielectric image line techniques. Experiments have been performed to measure conversion characteristics and minimum detectable signal. Applications are suggested based on minimum detectable signal for systems requiring small size and low cost. View full abstract»

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  • Asymptotic Eigenequations and Analytic Formulas for the Dispersion Characteristics of Open Wide Microstrip Lines

    Publication Year: 1981, Page(s):933 - 941
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    Through the matched asymptotic expansions technique, asymptotic eigenequations for the even and odd modes of an open wide microstrip transmission line are derived. The eigenequations, and simplifications thereof which do not involve integration, can he solved easily for the effective permittivity. Even though d/W is assumed to be small, the solutions are good even if d/ W≅0.8 when compared wi... View full abstract»

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  • Analysis of Single and Coupled Rectangular Dielectric Waveguides

    Publication Year: 1981, Page(s):870 - 874
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Single and coupled rectangular dielectric waveguides are analyzed by means of the mode-matching technique. Dispersion characteristics are given for dominant modes of the inverted stripline and rib waveguides. The propagation constant for Ey11-mode of the inverted strip line is found to become less than the lowest limit for guidance above a certain frequency. Influence of freq... View full abstract»

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  • Irregular Magneto-Optical Waveguides

    Publication Year: 1981, Page(s):906 - 910
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The theory of wave propagation along irregolar anisotropic guides (fibers) is discussed in brief. The problem in question is considered by spectral expansion, which is constructed, in turn, with the help of the scattering operator of conical waves. The general relations are illustrated by example of a round gyrotropic waveguide of a small cross section. View full abstract»

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  • Metal Walls in Close Proximity to a Dielectric Waveguide Antenna

    Publication Year: 1981, Page(s):962 - 966
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The effect of placing metal walls in close proximity to a dielectric antenna has been examined theoretically. When these walls are less than one millimeter away from a silicon dielectric waveguide operating nominally at 60 GHz, they affect the wavelength of the electromagnetic radiation within the guide. As the guide wavelength changes, the angle of radiated energy emanating from the metal stripe ... View full abstract»

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  • Method of Analysis of Planar Networks Including Radiation Loss

    Publication Year: 1981, Page(s):942 - 948
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    A general approach to the analysis of microwave planar structures, specifically intended to account for radiation loss is presented. By expanding the internal electromagnetic (EM) field in terms of resonant modes, also the external field is obtained in the form of a series, each term of which corresponds to the field radiated by a resonant mode excited in the structure. Neglecting the effect of th... View full abstract»

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  • Analysis of Periodic Ferrite Slab Waveguides by Means of Improved Perturbation Method

    Publication Year: 1981, Page(s):911 - 916
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    Periodic ferrite slab waveguides are analyzed by means of an improved perturbation method, and nonreciprocal leakage phenomena are shown theoretically. As an application of these phenomena, new planar isolators and circulators are proposed. Numerical examples are also provided. View full abstract»

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  • Circularly Polarized Linear Array Antenna Using a Dielectric Image Line

    Publication Year: 1981, Page(s):967 - 970
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A new circularly polarized antenna using a dielectric image line is proposed. This antenna is composed of a slotted conductive plane and a rectangular dielectric rod. This paper describes the design of and experimental results achieved with the circularly polarized array antenna fed by a dielectric image line. The fundemental characteristics of the image line are also presented. Since this line's ... View full abstract»

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  • A Periodic Branching Filter for Millimeter-Wave Integrated Circuits

    Publication Year: 1981, Page(s):971 - 978
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A number of passive and active devices using dielectric waveguides have been developed and find various applications in integrated circuits at the millimeter optical-frequency range. The design, theoretical considerations and experimental findings of a periodic branching filter using rectangular dielectric waveguides are described in this paper. Low insertion loss for the periodic branching filter... View full abstract»

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  • Microwave Modeling of Optical Periodic Waveguides

    Publication Year: 1981, Page(s):979 - 983
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A design procedure and experimental method is presented for modeling optical periodic waveguides by means of more convenient parallel plate microwave configurations. These models are suitable for verifying the beam-coupling properties of dielectric gratings that operate in the fundamental TE0 surface-wave mode. In particular, blazed gratings with high coupling efficiencies have been con... View full abstract»

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  • Anomalous Low-Loss Transmission in a Gas-Confined Dielectric Waveguide for Millimeter and Submillimeter Wavelengths

    Publication Year: 1981, Page(s):983 - 987
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A novel low-loss (gas-confined) dielectric waveguide for millimeter and submillimeter wavelengths was previously reported by the author. The waveguide consists of a thin dielectric tube separating an internal high-dielectric-constant gas from an external low-dielectric-constant gas. The attenuation constant of this form of waveguide usually increases with increasing tube thickness. The thick tube ... 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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