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IRE Transactions on Microwave Theory and Techniques

Issue 2 • Date April 1959

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Displaying Results 1 - 25 of 32
  • [Front cover - Apr. 1959 [T-MTT]]

    Publication Year: 1959, Page(s):f1 - f2
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    Freely Available from IEEE
  • Table of contents (Apr. 1959 [T-MTT])

    Publication Year: 1959, Page(s): 187
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    Freely Available from IEEE
  • Message from the Editor

    Publication Year: 1959, Page(s): 188
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    Freely Available from IEEE
  • Biography - Seymour B. Cohn

    Publication Year: 1959, Page(s): 189
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    Seymour B. Cohn (S'41-A'44-M'46-SM'51-F'59) was born in Stamford, Conn., on October 21, 1920. After receiving the B. E. degree in electrical engineering from Yale University, New Haven, Conn., in 1942, he worked for the Radio Research Laboratory of Harvard University, Cambridge, Mass., specializing in UHF and microwave receivers, circuits, and filters. In 1944 he represented the Radio Research Lab... View full abstract»

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  • Breaking through the Mental Barrier

    Publication Year: 1959, Page(s):190 - 191
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Any of us whose work requires thinking will realize that the brain was not really meant for scientific effort. As to whether it is better suited to its more basic functions of guiding the individual is another fascinating subject that I will not consider here. Instead, I choose to pinpoint and attack a major inadequacy of the mind that interferes with our professional labors, and hope thereby, in ... View full abstract»

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  • Reflection of a Pyramidally Tapered Rectangular Waveguide

    Publication Year: 1959, Page(s):192 - 196
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB)

    The reflection coefficient Gamma of a pyramidally tapered rectangular waveguide is derived by assuming that the taper impedance is proportional to the height and guide wavelength and inversely proportional to the width of the taper cross section. It is a shown that the loci of Gamma, plotted in the K plane as a function of taper length for some conventional tapers, do not pass through the center o... View full abstract»

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  • Cascade Directional Filter

    Publication Year: 1959, Page(s):197 - 201
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB)

    A directional filter is a completely matched four-port which exhibits a directional and a filter-like frequency characteristic. This paper explores the properties of N-directional filters connected in cascade through sections of transmission lines. Analysis shows that if a directional filter admits the equivalent circuit representation offered here, its transfer functions are functions of only one... View full abstract»

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  • Propagation in a Dielectric-Loaded Parallel Plane Waveguide

    Publication Year: 1959, Page(s):202 - 208
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (635 KB)

    A theoretical analysis of wave propagation in a parallel plane waveguide partially filled with a dielectric is performed. This transmission line is a symmetrical three-region structure consisting of two infinite parallel conducting planes with a dielectric slab of rectangular cross section between and contacting each of the planes. It has been found that TEM and TM modes cannot propagate on this s... View full abstract»

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  • Electromagnetic Backscattering Measurements by a Time-Separation Method

    Publication Year: 1959, Page(s):209 - 213
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (766 KB)

    The object of this research is to investigate the feasibility of adapting the conventional pulsed radar technique for closerange back-scattering measurements for obstacles of arbitrary shape and small scattering cross sections. The time-separation or microwave-pulse method described in this paper differs essentially from all previously used laboratory methods in that the scattered field does not m... View full abstract»

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  • On Network Representations of Certain Obstacles in Waveguide Regions

    Publication Year: 1959, Page(s):213 - 221
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (907 KB)

    Network representations for a class of obstacles in waveguide regions when the diffraction problem is of a vector type can be obtained by the use of E- and H-type modes. The special properties of these modes are discussed and highlighted by an example involving the network representation of a periodic strip grating in free space for oblique incidence. Transformations relating the different network... View full abstract»

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  • Reflectors for a Microwave Fabry-Perot Interferometer

    Publication Year: 1959, Page(s):221 - 228
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    The advantages of microwave interferometers for wavelength and other measurements at millimeter wavelengths are indicated, and a microwave Fabry-Perot interferometer discussed in detail. Analogous to the cavity resonator, this requires reflectors of high reflectivity, small absorption, and adequate size. Stacked dielectric plates, and stacked planar or rod gratings are shown to be suitable forms o... View full abstract»

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  • Precise Control of Ferrite Phase Shifters

    Publication Year: 1959, Page(s):229 - 233
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (461 KB)

    Hysteresis and thermal drifts can prevent accurate calibration of ferrite phase shifters. To provide a precise setting of phase in response to a control signal a servo system has been developed. This system utilizes a control frequency to determine uniquely the phase shift in a ferrite element. The desired phase shift is then a function only of control frequency and line length. Performance data a... View full abstract»

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  • Tables for Cascaded Homogeneous Quarter-Wave Transformers

    Publication Year: 1959, Page(s):233 - 237
    Cited by:  Papers (66)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB)

    Quarter-wave transformers are frequently required in microwave and UHF systems. An exact design procedure is known but involves lengthy calculations. Faced with the design of many such transformers, the calculations were programmed on an IBM 704 digital computer. The speed of computation is such that several hundred designs for 2, 3, and 4 section transformers were systematically computed in a few... View full abstract»

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  • The Synthesis of Symmetrical Waveguide Circulators

    Publication Year: 1959, Page(s):238 - 246
    Cited by:  Papers (75)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    A method for synthesizing symmetrical waveguide circulators by adjusting the eigenvalues of the scattering matrix is described. This procedure is particularly useful for the design of very compact circulators in the form of waveguide junctions containing ferrite obstacles. Permissible structural symmetries for a circulator are listed, and a standard form for the scattering matrix of a symmetrical ... View full abstract»

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  • Delay Distortion in Crystal Mixers

    Publication Year: 1959, Page(s):247 - 256
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (871 KB)

    Delay distortion is one of the most important characteristics in the frequency-modulated supermultichannel microwave repeater. With regard to receiving crystal mixers, the cause, shape, vanishing condition, etc., of delay distortion are analyzed, and the experiments show good agreement with the results of this analysis. To eliminate this delay distortion, the electrical length between the crystal ... View full abstract»

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  • The Efficiency of Excitation of a Surface Wave on a Dielectric Cylinder

    Publication Year: 1959, Page(s):257 - 268
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1183 KB)

    This paper presents a theoretical and experimental study of the excitation of the lowest order TM surface wave on an infinite dielectric cylinder. The source is a circular filament of magnetic current within the dielectric rod. The integral solution for the field is evaluated as a contour integral by applying Cauchy's theorem. The far zone radiation field is obtained by means of a saddle pointinte... View full abstract»

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  • Proposal for a Tunable Millimeter Wave Molecular Oscillator and Amplifier

    Publication Year: 1959, Page(s):268 - 272
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    An atomic beam apparatus suitable for a millimeter wave generator is theoretically discussed. The beam consists of atoms having a net magnetic moment. The upper and lower Zeeman levels of the atomic beam in a magnetic field are spatially separated by an inhomogeneous magnetic field. The upper state atoms enter a cavity where transitions occur at a frequency determined by a static magnetic field. T... View full abstract»

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  • High-Speed Microwave Switching of Semiconductors--II

    Publication Year: 1959, Page(s):272 - 276
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB)

    A relationship between low-power isolation and small-signal, low-frequency diode resistance is reported. A study of ambient heating indicates that with increasing temperature the diode characteristics tend to approach the line characteristic of the above relationship. Observed switching speeds of 1.5 to 3.0 mµs are reported. A theory is presented which agrees with the switching time data and ... View full abstract»

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  • A Logarithmic Transmission Line Chart

    Publication Year: 1959, Page(s):277 - 281
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (623 KB)

    A chart is presented which relates the real and imaginary components of the impedanceat any position along a transmission line to the magnitude and location of the standing wave. In the present chart the ordinate is R/Z0 plotted logarithmically and the abscissa is a function of X/R. Thus a change in the reference impedance becomes a simple vertical translation of any point. An auxiliary... View full abstract»

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  • The Far Fields Excited by a Point Source in a Passive Dissipationless Anisotropic Uniform Waveguide

    Publication Year: 1959, Page(s):282 - 287
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (694 KB)

    The direction of the net power flow associated with a propagating mode of an arbitrary passive disspationless anisotropic uniform waveguide may be opposite to its direction of (phase) propagation. It is shown that when a point source is introduced into a waveguide in which this is the case, such propagating modes contribute to the fields excited by this source only in that direction for which thei... View full abstract»

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  • Analysis of a Negative Conductance Amplifier Operated with a Nonideal Circulator

    Publication Year: 1959, Page(s):288 - 293
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (539 KB)

    Negative conductance amplifiers are usually operated with a circulator in order to achieve greater gain-bandwidth products and stable operation. Typical circulators differ from ideal circulators in that the forward loss between ports is not zero, and the reverse isolation between ports is not intinite. The main effects of nonintinite isolation are shown to be a modified gain-bandwidth product and ... View full abstract»

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  • Propagation Constants in Rectangular Waveguide Partially Filled with Dielectric (Correspondence)

    Publication Year: 1959, Page(s): 294
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (133 KB)

    There is considerable current interest in the production of guided electromagnetic waves having phase velocities equal to or less than the speed of light in free space (for example, in the design of traveling-wave slot antennas and of devices involving electron traveling-wave interactions). Such phase velocities can be obtained conveniently by partially loading a rectangular waveguide with dielect... View full abstract»

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  • A Short Rugged Ferrite Half-Wave Plate for a Single-Sideband Modulator (Correspondence)

    Publication Year: 1959, Page(s): 295
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (133 KB)

    One type of microwave phase shifter consists of two quarter-wave plates between which is placed a half-wave plate whose principal axis is rotatable. The phase shift introduced is directly proportional to the angular displacement of the principal axis of the half-wave plate. Continuous rotation of the principal axis causes continuous advancement or retardation of the phase of the signal traversing ... View full abstract»

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  • A Technique for Minimizing Hysteresis in a 35-DB Ferrite Variable Attenuator (Correspondence)

    Publication Year: 1959, Page(s):295 - 296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (251 KB)

    A requirement arose for a low-power microwave transmitter, the output power of which could be controlled over 40 db with a reset accuracy of 0.5 db for single frequency operation. View full abstract»

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  • Quarter-Wave Compensation of Resonant Discontinuities (Correspondence)

    Publication Year: 1959, Page(s):296 - 297
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    In designing RF transmission line components it is often necessary to place a short-circuited quarter-wavelength stub in parallel with the line or an open-circuited quarter-wavelength stub in series with the line. The stub can be broadbanded by merely changing the characteristic impedance of the line on either side of the stub for a distance of one quarter wavelength. View full abstract»

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Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is IEEE Transactions on Microwave Theory and Techniques.

Full Aims & Scope