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Microwave Theory and Techniques, IEEE Transactions on

Issue 6 • Date June 1968

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  • Table of contents - June 1968

    Publication Year: 1968 , Page(s): 325
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  • A Wideband Stripline Hybrid Ring (Correspondence)

    Publication Year: 1968 , Page(s): 361
    Cited by:  Papers (52)
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  • Propagation of TE Modes in Dielectric Loaded Waveguides - Part II: Numerical Results (Correspondence)

    Publication Year: 1968 , Page(s): 362 - 368
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  • Oscillator Noise Cancellation in Hybrid Mixers (Correspondence)

    Publication Year: 1968 , Page(s): 368 - 369
    Cited by:  Papers (1)
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  • Concentric Spherical Resonator Eigenfrequencies (Correspondence)

    Publication Year: 1968 , Page(s): 369 - 372
    Cited by:  Papers (1)
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  • Design Consideration for Circular Bend of Reflecting Beam Waveguide (Correspondence)

    Publication Year: 1968 , Page(s): 373 - 374
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  • The Effect of Paracitic Elements on Potential Stability Criteria for Tunnel Diodes (Correspondence)

    Publication Year: 1968 , Page(s): 374
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  • Addendum to "The Negative Capacitor, an Impedance Matching Element for Dielectric-Filled Transmission-Line" (Correspondence)

    Publication Year: 1968 , Page(s): 374
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  • Microwave abstracts, June, 1968

    Publication Year: 1968 , Page(s): 375 - 377
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  • Contributors, June, 1968

    Publication Year: 1968 , Page(s): 377 - 378
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  • Information for authors, June, 1968

    Publication Year: 1968 , Page(s): 379
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  • Membership application

    Publication Year: 1968 , Page(s): 380
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  • Losses in Microstrip

    Publication Year: 1968 , Page(s): 342 - 350
    Cited by:  Papers (210)  |  Patents (3)
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    Expressions are derived for the conductor loss in microstrip transmission lines. The formulas take into account the finite thickness of the strip conductor and apply to the mixed dielectric system. Good agreement with experimental data is obtained for rutile and alumina substrates. View full abstract»

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  • Birefringent Filter for Millimeter Waves

    Publication Year: 1968 , Page(s): 351 - 360
    Cited by:  Patents (8)
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    A scale model (f0 =20 GHz of a Solc-type birefringent wave filter for millimeter wavelengths is described. The filter consists of five cascaded identical half-wave plates, or crystals, each composed of an artificial anisotropic dielectric medium with its reference axis tilted at some prescribed angle to the plane of the input polarization. The design and analysis of an individual plate, using Collin's second-order theory of the birefringence of artificial anisotropic dielectrics, and the analysis of multielement filters (filters composed of many plates), aided by Evans' matrix method, are discussed. The experimental filter was tested in the range of 18 to 33 GHz, and its measured performance was found to compare well with the theoretical performance over a major portion of the range of frequencies used in the tests. A synthesis procedure for optimum (equal-ripple stopband) response multielement filters is given, together with tables of plate angles for such filters. In this procedure, the Dolph approximation and the Harris synthesis are combined. View full abstract»

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  • Computer Optimization of a Stabilizing Network for a Tunnel-Diode Amplifier

    Publication Year: 1968 , Page(s): 326 - 333
    Cited by:  Papers (3)
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    Computer-aided direct search is a useful and flexible method of optimizing noncommensurate networks or networks for which exact synthesis theories culminating in some particular response are not available. It can accommodate network parameter constraints and unconventional performance specifications and is not accompanied by problems of component realizability. A simple form of direct search is applied in this paper to the design of a microwave network whose performance is optimized within certain specifications. The network is a stabilizing and biasing arrangement for a tunnel-diode amplifier operating in a reduced height S-band rectangular waveguide, and takes the form of a coaxial-line band-stop filter. Parameter constraints are inherent to the problem so they are taken into account. The requirements of stability and low noise broadband amplification in conjunction with the external circuitry impose nonsymmetrical response restrictions on the input resistance and reactance of the network. At the same time it is required to minimize the square of the input reactance at selected frequencies. No available exact synthesis of band-stop filters can solve this problem as presented here. View full abstract»

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  • The Scattering of an Axial Cylindrical Surface Wave by a Perfectly Conducting Plane Annulus

    Publication Year: 1968 , Page(s): 334 - 341
    Cited by:  Papers (5)
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    The scattering of an axial cylindrical surface wave by a conducting plane annulus coaxial with a Goubau line is investigated both theoretically and experimentally. An integral equation for the current induced on the annulus is developed and solved numerically. A novel approach is used to enforce the edge condition directly in the numerical solution. The computed magnitude of the current induced on a large annulus is plotted and compared with the current which would flow on a short circuit in order to demonstrate the effects of the edges of the annulus. Values of the reflection coefficients are calculated from the computed current distributions. Numerical results are presented and compared with experimental values measured on a Teflon coated aluminum rod. Annluses measuring up to one wavelength in radial width and positioned up to one wavelength above the dielectric are considered, and agreement between theory and experiment is found to be good. A thorough description of the experimental apparatus and measuring technique is presented. 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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