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IEEE Transactions on Microwave Theory and Techniques

Issue 12 • December 1970

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Displaying Results 1 - 25 of 34
  • [Front cover - Dec. 1970]

    Publication Year: 1970, Page(s):f1 - f2
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  • Index to IEEE Transactions on Microwave Theory and Techniques, Dec. 1970

    Publication Year: 1970, Page(s):i - xii
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  • Table of contents - Dec. 1970

    Publication Year: 1970, Page(s): 1017
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  • 1970 International Microwave Symposium

    Publication Year: 1970, Page(s):1018 - 1020
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  • G-MTT National Lectureship, Dec. 1970

    Publication Year: 1970, Page(s):1020 - 1021
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  • Contributors, Dec. 1970

    Publication Year: 1970, Page(s):1183 - 1186
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  • Microwave abstracts

    Publication Year: 1970, Page(s): 1187
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  • [Back cover]

    Publication Year: 1970, Page(s):b1 - b2
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  • A Four-Cavity Elliptic Waveguide Filter

    Publication Year: 1970, Page(s):1109 - 1114
    Cited by:  Papers (108)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Realization of the bandpass fourth-order antimetric elliptic filter function in a waveguide structure is described. A mathematical model is shown to accurately predict the performance of the experimental narrow-bandpass waveguide filter. View full abstract»

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  • A Compact Broad-Band Thin-Film Lumped-Element L-Band Circulator

    Publication Year: 1970, Page(s):1100 - 1108
    Cited by:  Papers (23)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Impedance matrices including magnetic losses are developed for a number of lumped-element ferrite-loaded symmetrical three-port junctions. The scattering matrix eigenvalues corresponding to these matrices are determined as functions of frequency and circuit parameters and are used to analyze these three-ports with emphasis on their properties as circulators. A very compact broad-band thin-film lum... View full abstract»

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  • The Compact Turnstile Circulator

    Publication Year: 1970, Page(s):1096 - 1100
    Cited by:  Papers (26)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    This paper discusses the mode of operation of certain partial height ferrite, Y-junction circulators. It is proposed that such devices operate in a turnstile fashion with modes propagating axially along the ferrite rod. A simple experiment on a 4-GHz circulator substantiates this proposal, and a millimeter-wave device operating in this manner is described. View full abstract»

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  • Slot-Line Filters and Couplers

    Publication Year: 1970, Page(s):1089 - 1095
    Cited by:  Papers (33)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The slot-transmission line on a dielectric substrate has many possible microwave circuit applications. This paper presents experimental data concerning the performance of bandpass and bandstop filters and a hybrid coupler; the work described was performed at S-band frequencies using the single substrate slot line geometry. Also included are theoretical data concerning the slot-line wavelength and ... View full abstract»

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  • Launching Efficiency of the HE11 Surface Wave Mode on a Dielectric Rod

    Publication Year: 1970, Page(s):1033 - 1041
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The excitation of the dominant HE11 mode by a transversely oriented electric dipole on the axis of an infinitely long dielectric rod is studied. The method of analysis involves expressing the fields and the source in a Fourier integral in the z direction and a Fourier series in the φ direction in a cylindrical coordinate system (ρ,φ,z). The practical significance of the pres... View full abstract»

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  • Study of Insertion-Phase Variation in a Class of Ferrite Phasers

    Publication Year: 1970, Page(s):1084 - 1089
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    Insertion-phase variations for dual-mode reciprocal ferrite phasers are investigated in this paper. Expressions for variation in insertion phase as a function of ambient temperature are derived, as well as equations predicting insertion-phase changes resulting from high-average-power heating effects. Experimental data for an S-band phaser designed to operate at high-peak and high-average-power lev... View full abstract»

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  • Interdigital Capacitors and Their Application to Lumped-Element Microwave Integrated Circuits

    Publication Year: 1970, Page(s):1028 - 1033
    Cited by:  Papers (130)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    An analysis of the frequency response of interdigital capacitors, which leads to an optimal design, is given along with an expression for their static gap capacitance. The capacitor Q is given in terms of its geometry which consists of a planar interdigital thin-filrn conductor deposited on the surface of a relatively high dielectric constant substrate. Capacitance values ranging from 0.1 to 10 pF... View full abstract»

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  • Generalized Rational Function Approximation in Finite Intervals Using Zolotarev Functions

    Publication Year: 1970, Page(s):1052 - 1064
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    The results of Chebyshev in the theory of approximation find wide application in the design of circuits and microwave components. Part of the comparatively unknown work of Zolotarev and Achieser which has found useful applications in the design of certain microwave components, especially of mixed lumped/distributed components, is described. Several new results are presented, including formulas whi... View full abstract»

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  • Beam Lead Tunnel Diode Amplifiers on Microstrip

    Publication Year: 1970, Page(s):1077 - 1083
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    The characteristics of beam lead tunnel diodes and their application in low-cost microstrip reflection amplifiers are discussed. Three low-noise C-band amplifiers are described, including one with the amplifier printed directly on a garnet substrate with a three-port Y-junction circulator. View full abstract»

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  • Parametric Amplification of Millimeter Waves Using Wafer Diodes: Results, Potentials, and Limitations (Correspondence)

    Publication Year: 1970, Page(s):1173 - 1175
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    Theoretical considerations and measurements on wafer varactors using Schottky-Barrier junctions show their feasibility for millimeter-wave and possibly low submilliieter-wave frequencies. A degenerate parametric amplifier is described which can be electronically tuned over a wide range (Δ∮=2 GHz)around24 GHz and reaches a very low noise temperature (<70°K) when cooled. View full abstract»

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  • Small Elliptic-Function Low-Pass Filters and Other Applications of Microwave C Sections

    Publication Year: 1970, Page(s):1150 - 1158
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    A type of elliptic-function low-pass filter that is easy to design and construct, has low passband loss, and is very compact is described. With simple scaling and a limited number of standard parts, a broad range of cutoff frequencies can be obtained. Experimental results are presented for three filters with cutoff frequencies of 0.75, 1.0, and 1.5 GHz. Each filter occupies a volume of about 0.5 i... View full abstract»

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  • Analysis of the Arbitrarily Shaped Waveguide by Polynomial Approximation

    Publication Year: 1970, Page(s):1022 - 1028
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Theory is described for a computer program EHPOL which produces polynomial approximations to eigenfunctions of the Helmholtz equation in the interior of an arbitrarily shaped plane region. TWO types of boundary conditions are considered: homogeneous Neumann and Dirichlet. Neumann boundaries pose much fewer difficulties than do Dirichlet so considerable attention has been given to the construction ... View full abstract»

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  • A Short-Slot Waveguide Latching Ferrite Switch

    Publication Year: 1970, Page(s):1048 - 1051
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A new type of latching switch, which consists of a short-slot waveguide junction loaded with a latched ferrite at the coupling section, is presented. The behavior of this switch is explained by application of the concept of a short-slot waveguide directional coupler. In order to estimate isolation characteristics, the phase constants of the two modes in the coupling section loaded with ferrite tor... View full abstract»

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  • A Dual-Channel Rotary Joint for High Average Power Operation

    Publication Year: 1970, Page(s):1072 - 1077
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    A new type of dual-channel rotary joint combining the TM01 mode and the circularly polarixed TE11 modes in circular waveguide has been developed for an X-band antenna employed in a satellite communications link. Low losses are obtained in the high average power transmit channel (12.5 kW, CW) to avoid excessive temperature rise and in the receive channel to reduce the noise te... View full abstract»

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  • Ferrite Microstrip Phase Shifters with Transverse and Longitudinal Magnetization (Correspondence)

    Publication Year: 1970, Page(s):1170 - 1173
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    Phase shifts of opposing sign are produced in a finear section of microstrip by transverse and longitudinal magnetization of the ferrite substrate. Nonreciprocal phase shift is also produced by the transverse magnetization. Theoretical calculations of phase shift that account for both the diamagnetic effects and the tensor properties of the ferrite permeability agree well with properly constructed... View full abstract»

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  • Low-Noise Microstrip Mixer on a Plastic Substrate (Correspondence)

    Publication Year: 1970, Page(s):1178 - 1181
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Design information is given for microstrip on a thin sheet of polyolefin that is reinforced with aluminum. A balanced 6-GHz-mixer-70-MHz-preamplifier design on this material is described. A single sideband noise figure less than 6 dB is obtained over the operating frequency range with no tuning adjustments. View full abstract»

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  • Unequal-Arm Finite-Difference Operators in the Positive-Definite Successive Overrelaxation (PDSOR) Algorithm

    Publication Year: 1970, Page(s):1132 - 1149
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1488 KB)

    In an earlier publication, a procedure was described that permitted the application of successive overrelaxation (SOR) to the solution of higher modes of any uniform waveguide of arbitrary cross section, filled with an isotropic and homogeneous medium. An algorithm was described that employed a thirteen-point finite-difference operator formed from five constituent five-point operators, such that t... 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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