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IEEE Transactions on Microwave Theory and Techniques

Issue 2 • Date Feb 1987

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Displaying Results 1 - 25 of 28
  • [Front cover - Feb. 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):217 - 221
    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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  • Asian abstracts

    Publication Year: 1987, Page(s):222 - 240
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  • Call for papers - focused section on anthropomorphism in mechatronic systems

    Publication Year: 1987, Page(s): 241
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    Freely Available from IEEE
  • [Advertisement]

    Publication Year: 1987, Page(s): 242
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    Freely Available from IEEE
  • [Back cover - Feb. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):b1 - b2
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    Freely Available from IEEE
  • Dispersion Characteristics of Open Microstrip Lines

    Publication Year: 1987, Page(s):101 - 105
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    A method based on spectral-domain analysis is derived to compute effectively and automatically the effective relative permittivity of an open microstrip line. Simple but accurate closed-form expressions are used as the basis functions of the longitudinal and transverse current distributions. The numerical results are shown in tables and figures for various cases and compared WMI other available re... View full abstract»

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  • Dyadic Green's Functions for Integrated Electronic and Optical Circuits

    Publication Year: 1987, Page(s):207 - 210
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    Layered structures play an important role in both integrated microwave circuits and optical integrated circuits. Accurate prediction of device behavior requires evaluation of fields in the system. An increasingly used mathematical formulation refies on integral equations the electric field in the device is expressed in terms of the device current integrated into an electric Green's function. Detai... View full abstract»

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  • Nondestructive Gyrotron Cold-Cavity Q Measurements

    Publication Year: 1987, Page(s):96 - 100
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A novel method for cold testing a gyrotron resonator to determine its total Q is presented. Probing radiation is coupled into the resonator through its radiation pattern. A sensitive heterodyne receiver is used in the far field to detect the reradiated cavity resonances. Good agreement between measurement and calculated total Q is found for several 140-GHz gyrotron resonators in the TE031, TE... View full abstract»

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  • Finite-Element Analysis of Overmoded Waveguide Using Silvester's Algorithm (Short Paper)

    Publication Year: 1987, Page(s):205 - 206
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A general, high-order finite-element waveguide analysis program originated by Silvester [1], [2] has been used to analyze overmoded waveguides. The algorithm approximates arbitrarily shaped waveguides by triangular subsections and solves the Hehnholtz equation subject to homogeneous Dirichlet or Neumann boundary conditions to obtain the eigenvalues (cutoff wavelengths) and the eigenvectors (scalar... View full abstract»

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  • Phase Shifts in Single- and Dual-Gate GaAs MESFET's for 2-4-GHz Quadrature Phase Shifters (Comments)

    Publication Year: 1987, Page(s): 215
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

    In the above paper, the authors have discussed the variation of transmission phase for single- and dual-gate GaAs MESFET's when the bias is changed. View full abstract»

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  • Radiation Characteristics of a Dielectric Slab Waveguide Periodically Loaded with Thick Metal Strips

    Publication Year: 1987, Page(s):89 - 95
    Cited by:  Papers (13)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A theoretical analysis is presented for the radiation characteristics of a dielectric slab waveguide periodically loaded with thick metal strips. A boundary-integral-equation formulation is employed to describe the fieIds in the grating layer. Through numerical calculations, we show that the leakage constant of the fundamental TM mode is much larger than that of the fundamental TE mode. This prope... View full abstract»

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  • Rectangular Waveguide with T-Shaped Septa

    Publication Year: 1987, Page(s):201 - 204
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Recently, a new rectangular waveguide with two T-shaped septa has heen proposed by the authors as a superior alternative to conventional ridged guide. Here, numerical data on the cutoff and band-width characteristics of the dominant TE10 mode of rectangular waveguide with a single T-septum are presented and compared with those of single-ridged guides. The gap impedances of both the doub... View full abstract»

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  • Noise Reduction in GaAs Schottky Barrier Mixer Diodes (Short Paper)

    Publication Year: 1987, Page(s):212 - 214
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The sensitivity of heterodyne receivers operating at millimeter and submillimeter wavelengths is limited by the noise produced in the mixer element. In this paper we investigate the presence of excess noise in GaAs Schottky barrier mixer diodes. Comparison of the measured noise data with that predicted from noise models indicates that these devices typically exhibit excess noise. An additional fab... View full abstract»

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  • Finite-Element Analysis of Waveguide Modes: A Novel Approach that Eliminates Spurious Modes

    Publication Year: 1987, Page(s):117 - 123
    Cited by:  Papers (71)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    An efficient finite-element method for analyzing the propagation characteristics of a wide variety of waveguides is presented. A variational expression suited for the finite-element method is formulated in terms of the transverse electric and magnetic field components. In this approach all guided-mode solutions are real, while the spurious-mode solutions are not real. Therefore, discrimination of ... View full abstract»

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  • Variational Solutions on Two Opposite Narrow Resonant Strips in Waveguide

    Publication Year: 1987, Page(s):151 - 158
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A variational analysis with experimental verification is made to calculate the discontinuities due to the two opposite narrow resonant strips in waveguide. The current ratio between the strips is determined and the mutual interactions are calculated. The analysis gives a closed-form soIution which is quite general and which can he used to illustrate several special cases. View full abstract»

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  • Practical Aspects of the Injection-Locked Hybrid Discriminator

    Publication Year: 1987, Page(s):195 - 200
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    This paper analyzes the performance of an X-band (Z-band) injection-locked hybrid discriminator taking into consideration such practical circuit effects as the presence of signal delay in different parts of the circuit, amplitude perturbation of the locked oscillator, and the reflection arising from a detector mismatch. proposals are also made for the optimum design and the bandwidth extension of ... View full abstract»

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  • A 432-MHz Local Hyperthermia System Using an Indirectly Cooled, Water-Loaded Waveguide Applicator

    Publication Year: 1987, Page(s):106 - 111
    Cited by:  Papers (8)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    A water-loaded, indirectly cooled wavegnide antenna with a small aperture size (2 x 5.5 cm2) has been developed for local hyperthermia applications. The operation frequency is 432 MHz. The indirect cooling is achieved by circulating water in an external chamber having common walls with the waveguide, and good thermal and electrical stability is achieved for radiation powers up to 100 W.... View full abstract»

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  • Excitation of an Enclosed Lossy Cylinder by an Aperture Source (Short Paper)

    Publication Year: 1987, Page(s):210 - 212
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    We present a formulation for an aperture-excited cylindrical structure of circular cross section and of finite length. The solution method is straightforward but it is sufficiently general to permit quantitative estimates of the internal heating. When the axial dependency of the fields is ignored, the solution reduces to one employed earlier in confection with hyperthermic heating of human torsos ... View full abstract»

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  • The Microstrip Step Discontinuity: A Revised Description (Correction)

    Publication Year: 1987, Page(s): 216
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (22 KB)

    In the above paper, three additional references were included during the revision procedure. However, the changes were not reflected in the numbers of the references given in the figures. In Figs. 3-8, reference numbers [34] and/or [35] should have been, respectively, [37] and/or [38]. In addition, the date of receipt of the manuscript should have been November 28, 1984. View full abstract»

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  • An Isotropic Electric-Field Probe with Tapered Resistive Dipoles for Broad-Band Use, 100 kHz to 18 GHz

    Publication Year: 1987, Page(s):124 - 130
    Cited by:  Papers (56)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    A new broad-band electric-field probe, capable of accurately characterizing and quantifying electromagnetic (EM) fields, has been developed at the National Bureau of Standards (NBS). The probe's 8-mm resistively tapered dipole elements allow measurement of eleetric fields between 1 and 1600 V/m from 1 MHz to 15 GHz, with a flatness of +-2 dB. A mutually orthogonal dipole configuration provides an ... View full abstract»

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  • Analysis and Optimization of Millimeter-And Submillimeter-Wavelength Mixer Diodes

    Publication Year: 1987, Page(s):159 - 168
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    An analysis of the noise of millimeter- and submillimeter-wavelength mixers with GaAs Schottky diodes is presented. This analysis accounts for the correlation of the downconverted components of the time-varying hot-electron noise in the series resistance, and is thus accurate even for cryogenically cooled mixers operated at submillimeter wavelengths. This paper shows that the terms of the series-r... View full abstract»

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  • Wave Analysis of Noise in Interconnected Multiport Networks

    Publication Year: 1987, Page(s):112 - 116
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The noise performance of multiport networks of arbitrary topology is treated using wave analysis.This approach has advantages over other methods when using computer-aided design programs that are based on scattering parameters. In this paper we discuss the wave representation of noise in two-ports and passive multiports. We indicate bow to compute the noise performance of an arbitrary network and ... View full abstract»

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  • Time-Domain Simulation of n Coupled Transmission Lines

    Publication Year: 1987, Page(s):131 - 137
    Cited by:  Papers (90)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    In this paper, a general SPICE model for n coupled transmission lines is presented. The model consists of two identical transformation networks and n single-transmission-line models. The transformation networks are realized with linear time-invariant voltage-controlled voltage sources (VCVS's) and current-controlled current sources (CCCS's) only. A simplified model designed to simulate connections... View full abstract»

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  • Analysis of Stripline Filled with a Multilayered Dielectric Medium

    Publication Year: 1987, Page(s):169 - 174
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    An analysis has been carried out using conformal transformation for the case of a symmetric stripline filled with multilayered discrete dielectric media with their interfaces parallel to the ground planes. This has been applied to a stripline structure filled with a medium having a relative dielectric constant which is continuously varying in a direction perpendicular to the ground planes. Eight d... 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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