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IEEE Transactions on Microwave Theory and Techniques

Issue 11 • Nov 1987

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Displaying Results 1 - 25 of 28
  • [Front cover - Nov. 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):1077 - 1081
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (367 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: 1987, Page(s): 1082
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    Freely Available from IEEE
  • [Back cover - Nov. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):b1 - b2
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    Freely Available from IEEE
  • Generalized Lorentz Gauge and Boundary Conditions in Partially Dielectric-Loaded Cylindrical Waveguide (Short Paper)

    Publication Year: 1987, Page(s):1065 - 1066
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A generalized Lorentz gauge condition for the set of Vlasov-Maxwell equations is introduced. The condition is applied to the free-electron-laser instability of a relativistic electron beam in a partially dielectric-loaded waveguide. For the dielectric-loaded system with the external wiggler magnetic field, the potential approach with the generalized Lorentz gauge rather than the field approach is ... View full abstract»

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  • Latching Ferrite Quadrupole-Field Devices (Short Paper)

    Publication Year: 1987, Page(s):1062 - 1065
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In this paper a brief survey of research and development on latching ferrite quadnrpole-field devices in China is presented. Initially, theoretical analyses and some general roles for these kinds of devices are given. Some practical construction techniques and experimental results are also presented. Finally, many practical devices are described (e.g. reciprocal phase shifters with fast switching ... View full abstract»

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  • Improved Error-Correction Technique for Large-Signal Load-Pull Measurements (Short Paper)

    Publication Year: 1987, Page(s):1060 - 1062
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    This article presents an improved vector error-corrected calibration technique for the well-known system used for large-signal characterization of oscillator and power amplifier transistors. The calibration procedure is very similar to conventional automatic network analyzer calibration procedures, and all its measurements, except for one power measurement, are performed by the system itself. Ther... View full abstract»

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  • Optimized E-Plane T-Junction Series Power Dividers

    Publication Year: 1987, Page(s):1052 - 1059
    Cited by:  Papers (68)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    A rigorous design theory for compact rectangrdar waveguide power dividers with unsymmetrical series E-plane T-junctions of suitably optimized different waveguide heights and distances is described. The method is based on field expansion in normalized eigenmodes which yield directly the modal S-matrix of two appropriate key building blocks. The immediate modal S-matrix combination of the individual... View full abstract»

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  • Capacitance and Inductance Matrices for Multistrip Structures in Multilayered Anisotropic Dielectrics

    Publication Year: 1987, Page(s):1002 - 1008
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    In this paper we present a unified variational approach to determine the capacitance and inductance matices of generalized multistrip systems embedded in a multilayered iso/anisotropic dielectric lossless medium. The analysis is earned out in the spectral domain to take advantage of previously obtained recurrence relations which calculate the Green's function in the spectral domain. The method lea... View full abstract»

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  • Coupling Between an Abruptly Terminated Optical Fiber and a Dielectric Planar Waveguide

    Publication Year: 1987, Page(s):1043 - 1051
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The coupling between an optical fiber and a dielectric planar waveguide is analyzed when both guides are terminated abruptly and are facing each other. Mixed spectrum eigenwave representations of fields are employed inside the waveguides while Fourier integrals are utilized to describe the field in the space between the two guides. A coupled system of integral equations is derived by satisfying th... View full abstract»

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  • Shielding Effectiveness of Improved Microwave-Protective Suits

    Publication Year: 1987, Page(s):995 - 1001
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The shielding effectiveness of microwave-protective suits was determined by measuring the attenuation of sections of fabric by a waveguide-transmission-loss method. The attenuation of the entire suit on a full-sized phantom man model was determined by measuring the E fields at the surface of ten locations on the phantom by diode sensors during exposure to 915- and 2450-MHz radiation fields from st... View full abstract»

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  • A Coupled-Mode Approach to the Analysis of Fields in Space-Curved and Twisted Waveguides

    Publication Year: 1987, Page(s):978 - 983
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A coupled-mode approach for solving Maxwell's equations in terms of unitary and reciprocal unitary vectors is deduced in a twisted space-curved coordinate system. Application of this method to the analysis of fields in a space-curved and twisted single-mode optical fiber and a twisted rectangular microwave waveguide is presented and compared with the results from existing literature. View full abstract»

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  • Accuracy of Equations for Coupled Slab Lines (Letters)

    Publication Year: 1987, Page(s):1075 - 1076
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    The determination of the characteristic impedance of coupled slab lines has been a subject of investigation for many years. Following on Frankel's pioneering work [1], Chisholm obtained art accurate analytical solution for the odd-mode impedance of a pair of coupled slab lines [2]. In 1980, Levy presented Chisholm's equations, together with those due to McDermott for the even-mode impedance, in a ... View full abstract»

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  • Radiation of Millimeter Waves from a Leaky Dielectric Waveguide with a Light-Induced Grating Layer

    Publication Year: 1987, Page(s):1033 - 1042
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    A theoretical analysis is presented for the radiation characteristics of millimeter waves in a periodic dielectric waveguide having a light-induced grating layer. The waveguide is assumed to be composed of an insulator (sapphire) slab whose one surface is coated with a high-resistivity semiconductor (silicon) film. A boundary-integral-equation formulation is employed to obtain characteristic solut... View full abstract»

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  • Characterization of the Finline Step Discontinuity on Anisotropic Substrates

    Publication Year: 1987, Page(s):956 - 963
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    An analysis of the finline step discontinuity in either uniaxial or biaxial substrates is presented. The method is based on a spectral-domain hybrid-mode expansion in an enclosed finline cavity in conjunction with Galerkin's method. A numerically stable scattering matrix formulation is used. The effect of substrate anisotropy is described. The results are also compared with published experimental ... View full abstract»

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  • SIS Mixer to HEMT Amplifier Optimum Coupling Network (Short Paper)

    Publication Year: 1987, Page(s):1067 - 1069
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The coupling network between a superconductor-insulator-superconductor (SIS) mixer and a high-electron-mobility-transistor (HEMT) amplifier is investigated from the point of view of minimizing the overall noise temperature and also increasing the saturation level of the mixer. The effect of a negative output impedance of the mixer upon the amplifier noise is considered and an optimum negative sour... View full abstract»

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  • An Efficient Finite Element Method for Nonconvex Waveguide Based on Hermitian Polynomials

    Publication Year: 1987, Page(s):1019 - 1026
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    An efficient finite element method (FEM.) in waveguide analysis is described. The method rises Hermitian polynomials to interpolate the field compohent (Ez or Hz) and some of its derivatives at the nodal points, rather than the field components, as in the Lagrangian interpolation case. Element matrices, for a standard triangle, are given for third- and fifth-degree Hermitian ... View full abstract»

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  • Finite Element Method Applied to Skin-Effect Problems in Strip Transmission Lines

    Publication Year: 1987, Page(s):1009 - 1013
    Cited by:  Papers (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    This paper describes a two-dimensional finite element approach to the quasi-static TEM analysis of shielded or open conducting strips with applications to VLSI parasitic elements and transmission line characteristics of printed circuits. The approach uses a combination of two-dimensional and one-dimensional finite elements to solve the field problems in terms of the magnetic vector potential in th... View full abstract»

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  • Measurement of Shielding Effectiveness of Microwave-Protective Suits

    Publication Year: 1987, Page(s):984 - 994
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2416 KB)

    With more restrictive exposure standards and greater public concern about safety from nonionizing radiation, protective clothing to shield workers from dangerous levels of electromagnetic radiation has become imminently important. Tests were conducted of the shielding effectiveness of a number of microwave suits. Fabric attenuations at 10 selected locations on the suit were measured by the wavegui... View full abstract»

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  • New Quasi-Static Models for the Computer-Aided Design of Suspended and Inverted Mlcroitrip Lhes (Corrections)

    Publication Year: 1987, Page(s): 1076
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    The following errors appeared in the equations of the above paper. View full abstract»

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  • Monolithic Capacitors as Transmission Lines

    Publication Year: 1987, Page(s):964 - 970
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    The results of network analyzer measurements of high-Q multilayer (monolithic) chip capacitors show that the devices have the characteristics of open-circuited transmission lines. Both standard sizes (MIL-CDR-14 and MIL-CDR-12), ranging in capacitance values from 4.7 to 1000 pF, were tested on microstrip lines. A simple model of a periodically loaded line provides a dispersion relation that accoun... View full abstract»

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  • Plotting Vector Fields with a Personal Computer (Short Paper)

    Publication Year: 1987, Page(s):1069 - 1072
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A combination of a personal computer and an x-y plotter is utilized for generating high-quality graphical displays of vector fields. The input data file must specify values of the vector field at a number of equidistant points. Starting points of field lines are determined so that the partial fluxes between any two adjacent field lines are made equal to each other. The construction of the field li... View full abstract»

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  • Optoelectronic Pulse Compression of Microwave Signals

    Publication Year: 1987, Page(s):1014 - 1018
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Optically switched transmission line resonators are shown to generate short microwave pulses of higher output peak power than the CW input signal. This kind of pulse compression is achieved by using the resonator as a storage element and an optoelectronic switch as the output mirror. A theoretical analysis of the efficiency of this device is presented. Experimentally, a peak power enhancement of 1... View full abstract»

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  • A Comparative Statistical Study of Some Proposed Six-Port Junction Designs

    Publication Year: 1987, Page(s):971 - 977
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    Reflection coefficient measurements obtained from six-port reflectometers are analyzed from a statistical and geometrical point of view. The analysis concentrates on the effect of using noisy power meters, and a simply computed, geometrically interpretable estimator of the reflection coefficient possessing certain optimality properties is derived. A suitable performance measure for this estimator ... View full abstract»

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  • Design of Coupled Microstrip Lines by Optimization Methods (Short Paper)

    Publication Year: 1987, Page(s):1072 - 1074
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The design of two coupled microstrip lines is converted into an optimization problem, which is then solved by two methods of nonlinear mathematical programming. New formulas for calculating the first approximation of the solution, i.e., the starting point of the optimization, are given. 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