IEEE Transactions on Microwave Theory and Techniques

Issue 1 • Jan 1986

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  • [Front cover - Jan. 1986]

    Publication Year: 1986, Page(s):f1 - f2
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  • Patent abstracts

    Publication Year: 1986, Page(s):197 - 200
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  • IEEE copyright form

    Publication Year: 1986, Page(s): 201
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  • Membership application

    Publication Year: 1986, Page(s): 203
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  • [Advertisement]

    Publication Year: 1986, Page(s): 204
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  • [Back cover - Jan. 1986 [T-MTT]]

    Publication Year: 1986, Page(s):b1 - b2
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  • Field Theory Design of Square Waveguide Iris Polarizers

    Publication Year: 1986, Page(s):156 - 160
    Cited by:  Papers (36)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (584 KB)

    Profiled depth corrugated square waveguide polarizers are designed with the method of field expansion into eigenmodes, which includes higher order mode interaction between the step discontinuities. Computer-optimized design data are giyen for a compact Ku-band prototype with an exponentially varying depth function that achieves 90° +- 1° differential phase shift shift within the separate... View full abstract»

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  • In Situ Permittivity of Canine Brain: Regional Variations and Postmortem Changes

    Publication Year: 1986, Page(s):38 - 50
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1448 KB)

    A new probe-based measurements system was used to study dielectric properties of brain in situ, under conditions of induced physiological and pathological changes. Comparative measurements were made as function of time for 30 min prior to euthanasia and for 90-min post-mortem on the pia, the dura (both normal and anoxic), and in grey and white matter. All measurements were performed at 2450 MHz us... View full abstract»

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  • Nonuniform Layer Model of a Millimeter-Wave Phase Shifter

    Publication Year: 1986, Page(s):147 - 155
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (888 KB)

    The electromagnetic wave propagation of millimeter waves in dielectric waveguides with thin surface plasma layers is characterized. The phase and attenuation of a 94-GHz wave are computed for various surface plasma layer thicknesses as a function of earner density levels. The electron/hole pairs generated in the vicinity of the dielectric waveguide surface by photo excitation are assumed to have a... View full abstract»

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  • Propagation of Waves through Magnetoplasrna Slab Within a Parallel-Plate Guide

    Publication Year: 1986, Page(s):32 - 37
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (600 KB)

    By applying the variational equation is established for handling wave reaction theory, a variational propagation in a parallel-plate guide within which a magnetized inhomogeneous lossy plasma slab is inserted. The equation is then solved by the finite-element method along with the frontal solution algorithm. With such an approach, the reflection coefficient and the field distribution in the slab a... View full abstract»

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  • Analysis of Unsymmetrical Broadside-Coupled Striplines with Anisotropic Substrates (Short Paper)

    Publication Year: 1986, Page(s):188 - 191
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    A variational method of the analysis is described for the broadside-coupled striplines of unequal width. A compliance matrix is introduced for the unsymmetrical structure, and variational expressions are derived for the matrix elements for the first time. This method is applicable to the case with uniaxially anisotropic media, and it gives the transformation from the anisotropic to the equivalent ... View full abstract»

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  • A Fast and Reliable Method for Computer Analysis of Microwave Mixers

    Publication Year: 1986, Page(s):110 - 119
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (968 KB)

    In this paper, a numerical method is presented for analyzing microwave mixers. Particular consideration is given to the solution of the nonlinear pumping problem of real Schottky-barrier diodes. The new technique has a significantly improved convergence rate, which is demonstrated by means of direct comparisons with other methods. A convergence test procedure is proposed and applied which uses ran... View full abstract»

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  • TM Modes In Oversized Planar Metallic Waveguides (Short Paper)

    Publication Year: 1986, Page(s):172 - 175
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (384 KB)

    The propagation properties of transverse magnetic (TM) and hybrid modes in plane and circular metallic waveguides are considered when their dimensions are great with regard to the wavelength. When the oversizing is not too great, the behavior is the same as those of conventional metallic waveguides. For high frequencies (greater oversizing), we describe an unexpected bebavior for these modes. The ... View full abstract»

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  • A Dispersion Model for Coupled Microstrips

    Publication Year: 1986, Page(s):66 - 71
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (640 KB)

    The frequency-dependent propagation characteristics of symmetrical, nonsymmetrical, and multiple coupled microstrips are evaluated by utilizing a directly coupled parallel-plate ideal waveguide model. The closed-form expressions for the frequency-dependent parameters of this proposed semi-empirical utility model are derived in terms of the quasi-static parameters of the coupled microstrip structur... View full abstract»

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  • High-Speed and Low-Power GaAs Phase Frequency Comparator

    Publication Year: 1986, Page(s):142 - 146
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (696 KB)

    A high-speed and low-power consumption phase frequency comparator (PFC) for a phase lock stable oscillator was designed and fabricated with a GaAs MESFET BFL circuit for the first time. The threshold voltage, gate width, and gate length of GaAs MESFET's in the PFC were determined by circuit simulations for a high-speed and low-power operation. The fabrication process used buried p-layer SAINT-FET'... View full abstract»

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  • An Estimate of the Interaction Impedance of a Vane-Loaded Helix Using Equivalent-Circuit Analysis (Short Paper)

    Publication Year: 1986, Page(s):182 - 183
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB)

    The expression for the interaction impedance of a broad-band vane-loaded helical slow-wave structure has been found using Pierce's simple theory for a helix in free space, and the results of the equivalent-circuit analysis of the loaded structure. The interaction impedance has been found to be of the order of half the characteristic impedance in a typical loaded structure. The dependence of the sm... View full abstract»

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  • Exact Simulation and Sensitivity Analysis of Multiplexing Networks

    Publication Year: 1986, Page(s):93 - 102
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1008 KB)

    This paper presents a novel approach to the simulation and sensitivity analysis of multiplexing networks. All computations are performed efficiently utilizing the concept of forward and reverse analysis which is elegant and effective in cascaded circuit analysis. Formulas are derived for such responses as input or output reflection coefficient, common port and channel output port return losses, in... View full abstract»

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  • Exposure of Man in the Near-Field of a Resonant Dipole: Comparison Between Theory and Measurements

    Publication Year: 1986, Page(s):26 - 31
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (744 KB)

    The rate of the radio frequency energy deposition in a block model of the human body exposed in the near-field of a resonant dipole at 350 MHz was calculated using the moment method. Detailed maps of the electric field strength in a homogeneous model of a realistic shape under the same exposure conditions were obtained using a computer-controlled scanning system and an implantable electric field p... View full abstract»

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  • TE and TM Modes of Some Triangular Cross-Section Waveguides Using Superposition of Plane Waves (Short Paper)

    Publication Year: 1986, Page(s):161 - 167
    Cited by:  Papers (48)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (552 KB)

    Exact transverse electric and magnetic mode solutions of four triangular cross-section waveguides have been found via a new general method using Snell's law and superposition of plane waves. This paper presents results for 1) equilateral, 2) 30°, 30°, 120°, 3) isosceles right, and 4) 30°, 60° right triangular waveguides. The electric and magnetic field solutions form finit... View full abstract»

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  • Slot-Coupled T-junction of TE11 Coaxial to TE10 Rectangular Waveguide

    Publication Year: 1986, Page(s):51 - 57
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (584 KB)

    A solution is presented to the problem of a slot-coupled T-junction of a TE11 -mode coaxial to a TE10 -mode rectangular waveguide. A variational technique is employed which combines the reaction concept with the field representation of a waveguide slot and leads to a closed-form solution for the junction scattering matrix. Numerical examples illustrate the characteristics of ... View full abstract»

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  • Calculation of the Interaction Between the Fringing Capacitance of Symmetrical Stripline Using the Finite Element Method (Short Paper)

    Publication Year: 1986, Page(s):191 - 193
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (392 KB)

    This paper calculates the interaction between the fringing capacitance of symmetrical stripline using the finite-element method. The fringing capacitance interaction is presented as a function of T/B and W/B. This enables the characteristic impedance of narrow, high-impedance lines to be accurately and simply calculated. View full abstract»

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  • Analysis and Design of Microwave Balanced Mixers

    Publication Year: 1986, Page(s):120 - 128
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (896 KB)

    Based on the theory given in [1], planar balanced mixers are analyzed for fundamental and harmonic mixing, mixing product recovery, and the effect of circuit and diode parameters on the conversion loss. The successful incorporation of the proposed method in a CAD procedure is demonstrated through the development of a multioctave balanced mixer with L = 6 dB+-1 dB from 1.5 to 12.75 GHz. View full abstract»

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  • Response of Waveguides Terminated in a Tapered Metallic Wall (Short Paper)

    Publication Year: 1986, Page(s):175 - 178
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    The characteristics of waveguides terminated in a tapered metallic wall are analyzed by means of the modal analysis and scattering matrix concept of discontinuities. Several applications of this kind of termination are suggested. The results can be very useful in evaluating the phase errors produced due to the use of a short-circuited waveguide with a metallic wall not placed in an exact transvers... View full abstract»

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  • Study of a Noise Amplification Mechanism in Gryrotrons

    Publication Year: 1986, Page(s):72 - 79
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (800 KB)

    The electrostatic cyclotron instability driven by a relativistic mechanism is analyzed with a small-signal theory and is shown to be a significant noise amplification mechanism in gyrotrons. The mode is localized in the electrotron beam, with a growth rate strongly dependent on the wavelength and electron density but insensitive to the velocity spread. View full abstract»

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  • Conversion Losses in GaAs Schottky-Barrier Diodes (Short Paper)

    Publication Year: 1986, Page(s):183 - 188
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB)

    The conversion losses of a Schottky-barrier diode have been calculated for a set of realistic diode parameters. It is found that previous work overestimated the substrate losses by 30 percent. It is also shown that a lightly doped epitaxial layer will decrease the barrier capacitance and with properly designed thickness will avoid any resistance losses due to this layer. Parasitic losses can thus ... 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