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IEEE Transactions on Microwave Theory and Techniques

Issue 1 • Date Jan. 1984

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Displaying Results 1 - 25 of 32
  • [Front cover - Jan. 1984]

    Publication Year: 1984, Page(s):f1 - f2
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  • Dielectric Waveguide Corner and Power Divider with a Metallic Reflector (Short Paper)

    Publication Year: 1984, Page(s):113 - 116
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (426 KB)

    First Page of the Article
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  • Patent abstracts

    Publication Year: 1984, Page(s):139 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (187 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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  • Membership application

    Publication Year: 1984, Page(s): 142
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  • IEEE copyright form

    Publication Year: 1984, Page(s):143 - 144
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    Freely Available from IEEE
  • Technical Committees

    Publication Year: 1984, Page(s):145 - 146
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  • Accurate Wide-Range Design Equations for the Frequency-Dependent Characteristic of Parallel Coupled Microstrip Lines

    Publication Year: 1984, Page(s):83 - 90
    Cited by:  Papers (166)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    In this paper, closed-form expressions are presented which model the frequency-dependent even- and odd-mode characteristics of parallel coupled microstrip lines with hitherto unattained accuracy and range of validity. They include the effective dielectric constants, the characteristic impedances using the power-current formulation, as well as the open-end equivalent lengths for the two fundamental... View full abstract»

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  • A Dual Six-Port Network Analyzer Using Diode Detectors

    Publication Year: 1984, Page(s):78 - 82
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The performance of a dual six-port network analyzer using diode detectors is described. The network analyzer operates over the 2-18-GHz band using commercially available low-barrier Schottky diodes. The paper describes the process for calibrating the diodes for deviation from square law. Measurement results are presented showing the accuracy and precision of tbe six-port network analyzer when meas... View full abstract»

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  • 2-20-GHz GaAs Traveling-Wave Amplifier

    Publication Year: 1984, Page(s):71 - 77
    Cited by:  Papers (20)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    Single-stage and two-stage GaAs traveling-wave amplifiers operating with flat gain responses in the 2-20-GHz frequency range are described. The circuits are realized in monolithic form on a 0.1-mm GaAs substrate with 50-Omega input and output lines. Complete gate and drain dc bias circuitry is included on the chip. By cascading these amplifier chips, a 30-dB gain in the 2-20-GHz range is demonstra... View full abstract»

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  • Propagation on a Sheath Helix in a Coaxially Layered Lossy Dielectric Medium (Short Paper)

    Publication Year: 1984, Page(s):122 - 126
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Radial and axial dependence of the azimuthally symmetric fields in each coaxial layer may be expressed in terms of modified Bessel functions and complex exponentials, respectively. View full abstract»

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  • An Analysis of a Hybrid-Mode in a Twisted Rectangular Waveguide

    Publication Year: 1984, Page(s):65 - 71
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Analytic expressions of electromagnetic fields for the dominant hybrid-mode in a twisted rectangular waveguide are obtained. The fields exactly satisfy the boundary conditions on the guide walls in a helicoidal shape. By expanding these expressions for the fields in terms of the eigenfunctions of a straight waveguide, the hybrid-mode is found to be composed of a fundamental TE10 -mode c... View full abstract»

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  • Radar-Echo Location of Conducting Spheres in Waveguide (Short Paper)

    Publication Year: 1984, Page(s):120 - 122
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The radar-echo locations of conducting spheres placed in the center of the broad wall of a rectangular guide were measured using the synthetic-pulse technique. The measuring instrument was a six-port reflectometer whose results in the frequency domain were transformed digitally into the time domain. It was found that, as the size of the spheres was reduced, the radar-echo locations approached the ... View full abstract»

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  • A 125-260-GHz Gyrotron

    Publication Year: 1984, Page(s):58 - 64
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    The second gyrotron constructed at the University of Sydney has produced continuous microwave output at more than 60 frequencies in the range 125-260 GHz at power levels approaching 10 W. A gyrotron Iike this, with broad frequency coverage and moderate power output, has a wide range of possible applications, from spectroscopy to scattering from waves and fluctuations in plasmas. In this paper, the... View full abstract»

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  • Accurate Approximations for a Function Appearing in the Analysis of Microstrip (Short Paper)

    Publication Year: 1984, Page(s):131 - 133
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The function Q(x) defined in the body of the paper is approximated accurately over the entire range -1<= x < +1. The simple approximate formulas are then used to obtain some simple expressions for several quantities which are encountered in the quasistatic analysis of microstrip transmission line. View full abstract»

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  • S- and X-Band GaAs FET Mixers with Thin-Film Lumped Elements (Short Paper)

    Publication Year: 1984, Page(s):135 - 138
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The design and performance of 2- and 11-GHz band mixers with a single-gate GaAs FET are presented in this paper. A mixer configuration in which the load oscillator (LO) signal is applied to the source is used. Matching networks are constructed with thin-film lumped elements fabricated on alumina. An SSB noise figure of 6.2 dB, with an associated conversion gain of 10 dB, has been achieved at the 1... View full abstract»

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  • The Microstrip Open-Ring Resonator

    Publication Year: 1984, Page(s):102 - 107
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The open-ring microstrip resonator is analyzed by utilizing the two-dimensional magnetic wall model. The solution and the numerical results for the eigenvalues and the electromagnetic fields for various resonant modes are presented. It is shown that the experimental results are in good agreement with the theoretical predictions based on this model. View full abstract»

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  • Broadside-Coupled Slot-Line Field Components (Short Paper)

    Publication Year: 1984, Page(s):116 - 120
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    This paper presents expressions for the odd- and even-mode electric field components and also the magnetic field components in the air, overlay, and dielectric regions of the broadside-coupled slot-line structure. These expressions are numerically computed, and the fields in the cross section and the Iongitudinal section are illustrated. The surface current distribution on the metal surfaces are a... View full abstract»

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  • Properties of the Symmetrical Circuit and its Broad-Band Five-Port Design

    Publication Year: 1984, Page(s):51 - 57
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The properties of the mismatched symmetrical five-port circuit are discussed, i.e., the equations for the maximum and minimum couplings of a mismatched symmetrical five-port circuit are derived by appropriate approximations. The approximate equations for the maximum and minimum phase differences due to mismatches of a symmetrical five-port circuit are also derived. Furthermore, a broad-band design... View full abstract»

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  • Field Distribution of Two Conducting Posts in a Waveguide

    Publication Year: 1984, Page(s):29 - 33
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    This paper reports a field analysis of two short and narrow metal posts in a rectangular waveguide. The posts project from the center of the wider wall: one post is "grounded" in the wall, and the other post terminates in a variable impedance (coaxial line). An integral over a Green's function relates the post currents to the electric field, which is high and quite nonuniform near the posts, and d... View full abstract»

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  • Dispersion Characteristics of Twisted Rectangular Waveguides

    Publication Year: 1984, Page(s):91 - 96
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Based on the expressions for the dominant hybrid-mode fields in twisted rectangular waveguides, dispersion formulas with two perturbational factors have been derived theoretically. These factors correspond to the two effects of the twist on the dominant wave propagation, respectively. The one expresses a shift in the cutoff frequency while the other expresses the effect of elongation in the transm... View full abstract»

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  • Impedance Calculation of Three Narrow Resonant Strips on the Transverse Plane of a Rectangular Waveguide (Short Paper)

    Publication Year: 1984, Page(s):126 - 130
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A theoretical analysis has been developed to calculate the impedance of two inductive strips and one capacitive strip located on the transverse plane of a rectangular waveguide. The current ratios among the strips were determined by a variational method and then used for impedance calculations. The results can be applied to the impedance calculations of a single capacitive strip, two inductive str... View full abstract»

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  • W-Band Low-Insertion-Loss E-Plane Filter (Short Paper)

    Publication Year: 1984, Page(s):133 - 135
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Computer-optimized design data for a four-resonator metallic E-plane filter are given with a midband frequency of about 94 GHz. The method of field expansion into suitable eigenmodes used considers the effects of finite insert thickness and higher order mode interaction. The measured minimum passband insertion loss of a metal filter prototype is 1.5 dB. View full abstract»

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  • Characteristics of Some Asymmetrical Coupled Transmission Lines (Short Paper)

    Publication Year: 1984, Page(s):108 - 110
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    In this paper, expressions for the characteristics of some asymmetrical coupled transmission lines are derived. These include expressions for the capacitances, impedances, and phase velocities of asymmetrical coplanar strips, asymmetric coupled striplines, and asymmetric coupled microstriplines. Accuracy of these expressions is compared against available numerical results obtained rising varous nu... View full abstract»

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  • Design of Multisection Impedance-Matched Dielectric-Slab Filled Waveguide Phase Shifters

    Publication Year: 1984, Page(s):34 - 39
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Optimum-matched dielectric-slab filled waveguide phase shifters are designed with the method of field expansion into eigenmodes, which includes higher order mode interaction between the step discontinuities. The relative phase shift is mechanically adjustable between 0° and about 360° at midband frequency by lateral displacement of the dielectric slab. Computer-optimized design data are ... View full abstract»

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  • A Planar Quasi-Optical Subharmonically Pumped Mixer Characterized by Isotropic Conversion Loss

    Publication Year: 1984, Page(s):97 - 102
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    By using a subharmonically pumped circuit in a quasi-optical planar mixer, we have found it possible to use an LO frequency of one-half the normaf value with little added circuit complexity. This circuit shows conversion loss as low as 8.6dB +- 2 dB at 14 GHz. Through the means of a newly defined quasi-optical mixer parameter called isotiopic conversion loss (Liso), we find that perform... 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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