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IEEE Transactions on Microwave Theory and Techniques

Issue 2 • Date Feb. 1985

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Displaying Results 1 - 25 of 25
  • [Front cover - Feb. 1985 [T-MTT]]

    Publication Year: 1985, Page(s):f1 - f2
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  • 85 - 115-GHz Receivers for Radio Astronomy

    Publication Year: 1985, Page(s):90 - 95
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (987 KB)

    Low-noise receivers for radio astronomy have been built using Pb alloy superconducting tunnel junction mixers operating at 4.5 K. They have been used for 85-115-GHz astronomy with double-sideband receiver noise temperature between 70 and 200 K. Junction fabrication and receiver construction, operation, and performance are described herein. View full abstract»

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  • Patent Abstracts (Feb. 1985 [T-MTT])

    Publication Year: 1985, Page(s):175 - 177
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  • IEEE Microfilm (Feb. 1985 [T-MTT])

    Publication Year: 1985, Page(s): 178
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    Freely Available from IEEE
  • Membership application

    Publication Year: 1985, Page(s): 179
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    Freely Available from IEEE
  • Table of contents - Preview of March (1985 [T-MTT])

    Publication Year: 1985, Page(s): 180
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  • [Back cover - Feb. 1985 [T-MTT]]

    Publication Year: 1985, Page(s):b1 - 85
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  • On the Definition of Parameters in Ferrite-Electromagnetic Wave Interactions (Comments)

    Publication Year: 1985, Page(s):172 - 173
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In the above paper, Bolle and Lewin discuss definitions of some parameters characterizing the material in ferrite-electromagnetic wave interactions. According to this discussion, the direction of propagation, and not the direction of magnetization, is recommended as a reference direction. In this letter, it is shown, however, that this is not generally valid. Some examples are used to show instant... View full abstract»

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  • Em Local Heating with HF Electric Fields (Comments)

    Publication Year: 1985, Page(s): 171
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    The above paper recently described a synthesis procedure that is intended for use in designing multisection capacitor-plate applicators for treatment by hyperthermia. The distribution of potentials on the subelectrodes is determined in order to obtain a specified pattern of energy deposition. While the derivation in that paper appears to be sound, considerable care must be used if the procedure is... View full abstract»

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  • On the Graceful Degradation Performance of Multiple-Device Oscillators (Short Papers)

    Publication Year: 1985, Page(s):168 - 170
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Kurokawa's theory of multiple-device oscillators is extended to an analysis of the graceful degradation performance (GD) of the power-combined oscillators. The analysis shows that the failure of some of the constituent devices of a multiple-device oscillator results in a load-pull effect on the operating devices along with a degradation of power-combining efficiency of the oscillator circuit. A tr... View full abstract»

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  • An Iterative Moment Method for Analyzing the Electromagnetic Field Distribution Inside Inhomogeneous Lossy Dielectric Objects (Short Papers)

    Publication Year: 1985, Page(s):163 - 168
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    An iterative method is proposed for solving the electromagnetic deposition inside lossy inhomogeneous dielectric bodies. The technique uses the conventional method of moments to formulate the problem in matrix form. The resulting system of linear equations is solved iteratively by the method of conjugate gradients. The main advantage of the method is that the iterative procedure does not require t... View full abstract»

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  • Field Theory Design of Rectangular Waveguide Broad-Wall Metal-Insert Slot Coulplers for Millimeter-Wave Applications

    Publication Year: 1985, Page(s):95 - 104
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    A design theory for broad-wall metal-insert slot couplers suitable for an inexpensive and very accurate metal-etching manufacturing technique is described. The method of field expansion into suitable eigenmodes used considers the effects of finite insert thickness and higher order mode interaction at the step discontinuities. Computer-optimized design data for -3-dB couplers in the Ka- and W-bands... View full abstract»

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  • Analysis of the Transmission Characteristics of Inhomogeneous Grounded Finlines (Short Papers)

    Publication Year: 1985, Page(s):145 - 149
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper describes a concept for an efficient design of finline tapers that is especially useful in cases when certain quantities have heen prescribed with respect to reflection loss and bandwidth. Since abrupt discontinuities are neglected, the analysis is applicable to smooth finline tapers only. Various contour functions are investigated for the taper optimization. Experimental results for op... View full abstract»

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  • Variational Analysis of Ridged Waveguide Modes

    Publication Year: 1985, Page(s):111 - 120
    Cited by:  Papers (50)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Brief expressions of eigenvalue problems, nornral modes, and electric-field profiles for all odd TE and TM modes of ridged waveguides, and the guide wavelength and characteristic impedance for the TE10 dominant mode, are presented in this paper. In this analysis, the computation time can be reduced by getting simple approximated variational expressions for eigenvalue equations by using ... View full abstract»

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  • A Broad-Band Directional Coupler for Both Dielectric and Image Guides (Short Papers)

    Publication Year: 1985, Page(s):161 - 163
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A four-port directional coupler is presented for use in dielectric and image guides. Simple design equations are derived and the subsequent results are in good agreement with theory. Broad-band performance has been achieved over the entire conventiortal waveguide bandwidth (26-40 GHz). View full abstract»

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  • A Design Method of Bandpass Filters Using Dielectric-Filled Coaxial Resonators (Short Papers)

    Publication Year: 1985, Page(s):152 - 157
    Cited by:  Papers (50)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Design formulas for capacitively coupled bandpass filters using dielectric-filled coaxial resonators are derived and experimentally verified. The most important advantage of this filter is its ability to provide wide stopband characteristics for harmonics suppression. Its features can be obtained from the configuration using both quarter-wavelength uniform impedance resonators (UIR's) and stepped ... View full abstract»

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  • Exact Wave Resistance of Coaxial Regular Polygonal Conductors (Short Papers)

    Publication Year: 1985, Page(s):143 - 145
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    There are various cases in which one can evaluate exactly the wave resistance of coaxial conductors such that each of the inner and outer conductors is a regular polygon. They are obtained by conformal mapping using complete elliptic integrals. Such typical examples each with exact wave resistances are shown. View full abstract»

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  • A Short History of Microwave Acoustics (Corrections)

    Publication Year: 1985, Page(s): 173
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    In regard to Section III of the above paper, John Eshbach has brought to my attention that the original experiments on microwave magnetoelastic YIG delay lines were performed by him on disc-shaped geometries and published in 1962 . His 1963 paper gave the first details of the electromagnetic --> spin --> acoustic conversion process for a YIG disc, which is shown in Fig. 5 of the above paper ... View full abstract»

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  • 12-GHz-Band GaAs Dual-Gate MESFET Monolithic Mixers

    Publication Year: 1985, Page(s):105 - 110
    Cited by:  Papers (11)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    12-GHz-band GaAs dual-gate MESFET monolithic mixers have been developed for use in direct broadcasting satellite receivers. In order to reduce chip size, a buffer amplifier has been connected directly after a mixer IF port, instead of employing an IF matching circuit. The mixer and the buffer were fabricated on separate chips, so that individual measurements could be achieved. Chip size is 0.96X 1... View full abstract»

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  • The Electric-Field Problem of an Interdigital Transducer in a Multilayered Structure

    Publication Year: 1985, Page(s):121 - 129
    Cited by:  Papers (9)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A computational technique for the determination of the potential distribution of an interdigital transducer in a layered nonpiezoelectric environment is presented. Firstly, the problem is reduced to a dual boundary value problem for the potential distribution and the jump in the current density in the place of the interdigital transducer. Secondly, an iteration scheme to solve this dual boundary v... View full abstract»

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  • Conservation Laws for Distributed Four-Ports (Short Papers)

    Publication Year: 1985, Page(s):157 - 160
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Condition of reciprocity, Iosslessness, bilateral symmetry, transversal symmetry, and semireciprocity is given for a four-port in terms of its impedance, admittance, scattering, and transfer representation. Corresponding conditions are also presented for the system coupling matrix of a uniform distributed circuit. The results are applied to an anisotropic stratified waveguide. View full abstract»

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  • Power-Handling Capabilities of Circular Dielectric Waveguide at Millimeter Wavelengths

    Publication Year: 1985, Page(s):85 - 89
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The power-handling capabilities of a circular dielectric waveguide propagating the single HE11 mode are discussed. Simple calculations illustrate the limits imposed by dielectric heating and dielectric breakdown. Examples are presented for polystyrene and polytetrafluoroethylene (PTFE) guides at 70 GHz. The results suggest that maximum power levels for circular dielectric waveguide in t... View full abstract»

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  • Phase-Matched Waveguide Using the Artificial Anisotropic Structure and its Application to a Mode Converter (Short Papers)

    Publication Year: 1985, Page(s):149 - 152
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Phase matching by the artificial anisotropic structure and its application to a mode converter are proposed for millimeter-wave dielectric circuitry. A phase-matched dielectric planar waveguide is designed and mode conversion characteristics are studied. An experimental result of the nonreciprocal mode converter are presented to show the usefulness of the structure. View full abstract»

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  • Computer Calculation of Large-Signal GaAs FET Amplifier Characteristics

    Publication Year: 1985, Page(s):129 - 135
    Cited by:  Papers (180)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    A simple and efficient method of GaAs FET amplifier analysis is presented. The FET is represented by its circuit-type nonlinear dynamic model taking into account the device's main nonlinear effects including gate-drain voltage breakdown. An identification procedure for extraction of the model parameters is described in detail and examples are given. The calculation of the amplifier response to a s... View full abstract»

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  • Short Millimeter Low Local Wavelength Mixer with Oscillator Power

    Publication Year: 1985, Page(s):135 - 142
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    This paper discusses development, for the 240-GHz region, of whisker contacted diode mixers with LO powers between 10 and 50 µW. Mixer requirements for low parasitic diodes, situated in high-embedding impedance circuits are described and appropriate RF and IF circuit designs presented. A capacitive post RF matching circuit for a full-height waveguide is developed with superior bandwidth chara... 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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Jenshan Lin
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