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IEEE Transactions on Microwave Theory and Techniques

Issue 4 • Apr 1987

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  • [Front cover - Apr. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):f1 - f2
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    Freely Available from IEEE
  • Patent abstracts

    Publication Year: 1987, Page(s):474 - 477
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 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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  • IEEE Press Books [advertisement]

    Publication Year: 1987, Page(s): 478
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    Freely Available from IEEE
  • IEEE Individual Learning Packages [advertisement]

    Publication Year: 1987, Page(s): 479
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    Freely Available from IEEE
  • Membership application

    Publication Year: 1987, Page(s): 480
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    Freely Available from IEEE
  • [Back cover - Apr. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):b1 - b2
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    Freely Available from IEEE
  • A GaAs MESFET Mixer with Very Low Intermodulation

    Publication Year: 1987, Page(s):425 - 429
    Cited by:  Papers (160)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    This paper describes the design and performance of a new type of resistive mixer, which uses the channel resistance of a GaAs MESFET to achieve frequency mixing. Because this resistance is highly linear, very low intermodulation results. The mixer can be analyzed via existing mixer theory, with good agreement with measured performance. At 10 dBm LO power, the X-band mixer achieves 6.5 dB conversio... View full abstract»

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  • Dispersion in Unilateral Finlines on Anisotropic Substrates (Short Paper)

    Publication Year: 1987, Page(s):448 - 450
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The dispersion characteristics of the dominant and higher order modes in unilateral finlines on uniaxially anisotropic substrates have been obtained. The solution has been obtained by applying the equivalent transmission-line concept in the spectral domain and by using Galerkin's method. Numerical results for the propagation constant as a function of the slot-width ratio and frequency are presente... View full abstract»

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  • An Experimental Verification of a Simple Distributed Model of MIM Capacitors for MMIC Applications

    Publication Year: 1987, Page(s):403 - 408
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A distributed model has been derived for MIM capacitors using a simple coupled-transmission-line approach. The model has been compared with measured S-parameter data from MIM capacitors having different aspect ratios fabricated on 4-mil GaAs substrates. The agreement is very good. The derived model will converge to the first-order capacitor model, generally given in the literature, under a few ass... View full abstract»

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  • A Simple Technique for Investigating Defects in Coaxial Connectors (Short Paper)

    Publication Year: 1987, Page(s):460 - 464
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    This paper describes a technique that uses swept-frequency automatic network analyzer (ANA) data for investigating electrical defects in coaxial connectors. The technique will he useful to connector and ANA manufacturers and to engineers interested in determining connector characteristics for error analyses. A simplified theory is presented and the technique is illustrated by applying it to pertur... View full abstract»

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  • Analysis of a Class of Cylindrical Multiconductor Transmission Lines Using an Iterative Approaclh

    Publication Year: 1987, Page(s):415 - 424
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    A class of cylindrical multiconductor transmission lines is theoretically analyzed, and useful parameters, e.g., characteristic impedance and effective dielectric constant, are derived. Discretization of the continuous functions and exploitation of the periodicity of the cylindrical structure lead to a discrete convolution which can be carried out numerically rigorously and efficiently using the F... View full abstract»

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  • A Symmetrical Condensed Node for the TLM Method

    Publication Year: 1987, Page(s):370 - 377
    Cited by:  Papers (442)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A new symmetrical condensed node is developed for the analysis of electromagnetic waves by the transmission-line modeling (TLM) method of numerical analysis.The new node has the advantage of condensing the field components to one point in space at the node and removes the disadvantage of asymmetry in existing condensed nodes. View full abstract»

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  • Nonlinear Analysis of GaAs MESFET Amplifiers, Mixers, and Distributed Amplifiers Using the Harmonic Balance Technique

    Publication Year: 1987, Page(s):441 - 447
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The harmonic balance technique with Newton's method is used to analyze several forms of large-signal operation of GaAs MESFET's, including, for the first time, a multiple-device configuration. Computer programs for the study of the MESFET mixer, intermodulation distortion in MESFET amplifiers, and the large-signal analysis of the MESFET distributed amplifier are described and examples of analyses ... View full abstract»

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  • An Efficient Approach for Large-Signal Modeling and Analysis of the GaAs MESFET

    Publication Year: 1987, Page(s):396 - 402
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A nonlinear circuit model of the GaAs MESFET is developed by extracting circuit parameters from dc and small-signal RF measurements in a systematic manner. The circuit model is then analyzed by an efficient algorithm called the modified multiple-reflection method. For the first time, this method is applied to MESFET circuit analysis. Compared with the original multiple-reflection method, the modif... View full abstract»

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  • Calculation of Cutoff Wavenumbers For TE and TM Modes in Tubular Lines with Offset Center Conductor (Additional Comments)

    Publication Year: 1987, Page(s):469 - 470
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Although Vishen et al. refer to the early work of Veselov and Semenov, no comparison is made between their formulation and the one found in. I fail to recognize any essential differences between the two approaches. Furthermore, the authors state that the technique "based on Graf's addition theorem for Bessel functions" was developed by Singh and Kohtari, whereas in fact it appears that the same te... View full abstract»

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  • Admittance of Irises in Coaxial and Circular Waveguides for TE11-Mode Excitation

    Publication Year: 1987, Page(s):430 - 434
    Cited by:  Papers (9)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The admittance of irises in both coaxial and circular waveguides is deduced from a mode-matching technique. Design data for the effective admittance to TE11 -mode excitation are given for a range of waveguide and iris dimensions. View full abstract»

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  • Waveform Standards for Electrooptics: A Pulse Duration Comparison (Short Paper)

    Publication Year: 1987, Page(s):450 - 453
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A transfer standard has been developed for use in comparing the measurement capability of the Automatic Pulse Measurement System (APMS) at the National Bureau of Standards to that of the recently developed electrooptic samplers. This transfer standard is a comb generator driven by a 90-MHz sine wave. Using this standard, measurements were made of the pulse waveform of a comb generator output with ... View full abstract»

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  • On Reducing the Period of Input Pulse Trains Using Coupled-Line Networks

    Publication Year: 1987, Page(s):409 - 414
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    The theoretical and experimental results on converting input pulse trains into bipolar pulse trains of higher speed are presented. The network used here for such functions consists of two strip-coupled lines and three resistors. The experiment shows good agreement with theory. View full abstract»

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  • Analysis of Waveguiding Structures Employing Surface Magnetoplasmons by the Finite-Element Method (Short Paper)

    Publication Year: 1987, Page(s):464 - 468
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The dispersion relation and electromagnetic field distributions for a gyroelectrically loaded waveguiding structure are obtained utilizing finite-element techniques. The structure considered consists of two layers, one a dielectric and the other a semiconductor, bounded by two perfectly conducting planes. The finite-element solution for the lowest real branches in the dispersion spectrum was compa... View full abstract»

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  • Numerical Results for the Symmetrical Condensed TLM Node

    Publication Year: 1987, Page(s):378 - 382
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Numerical calculations have been made in order to test the accuracy of the recently derived three-dimensional symmetrical condensed TLM node for electromagnetic. Demonstrations of its use in these areas are given. Analysis of dispersion characteristics shows that the velocity error bound for the new symmetrical condensed node is likely to be less than that for the expanded node. Predictions of the... View full abstract»

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  • Millimetric Nonreciprocal Coupled-Slot Finline Components (Comments)

    Publication Year: 1987, Page(s):470 - 472
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A statement is made concerning the feasibility of nonreciprocal components with ferrites magnetized in the direction of propagation. View full abstract»

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  • Gain-Bandwidth Properties of a Class of Matched Feedback Amplifiers

    Publication Year: 1987, Page(s):361 - 369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    This paper considers the analysis and synthesis of small-signal feedback amplifiers which use shunt feedback around a generic gain block. The analysis presented leads to estimates of all network element values and predicts the closed-loop broad-band gain, bandwidth and quality of match at both ports. The tradeoff of gain for quality of match is made evident by a graphical technique. The paper also... View full abstract»

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  • New Quasi-Static Models for the Computer-Aided Design of Suspended and Inverted Microstrip Lines (Short Paper)

    Publication Year: 1987, Page(s):453 - 457
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    New quasi-static models for the computer-aided design (CAD) and analysis of open suspended and inverted microstrip lines are reported. The models are obtained through generalizing those reported earlier and are applicable up to epsilonr= 20, thereby covering all the practically used substrate materials for these structures. The models also cover a larger range of dimension ratios and ar... View full abstract»

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  • Calculation of Cutoff Wavenumbers for TE and TM Modes in Tubular Lines with Offset Center Conductor (Comments)

    Publication Year: 1987, Page(s): 469
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    In the paper by Vishen et al. [1], the authors refer to two papers of ours, numbered [8] and [10] in their list of references, and apparently without any elaboration make certain unwarranted comments on the method and results of [8], namely: Some of the tabulated parameters of [8] actually yield nonphysical results; also, symmetric and antisymmetric modes appear to be degenerate, which contradicts... View full abstract»

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  • Performance of Arrays of SIS Junctions in Heterodyne Mixers

    Publication Year: 1987, Page(s):435 - 440
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    We have made a systematic experimental study of the performance of millimeter-wave quasiparticle heterodyne mixers which use arrays of SIS tunnel junctions. Sets of arrays with N =1, 5, 10, 25, and 50 junctions in series were fabricated by photolithography. All of the arrays in a given set were made on a single silicon wafer so that their response time parameter omegaSRNC wou... 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