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IRE Transactions on Microwave Theory and Techniques

Issue 5 • September 1960

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  • [Front cover - Sep. 1960 [T-MTT]]

    Publication Year: 1960, Page(s):f1 - f2
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    Freely Available from IEEE
  • Table of contents (Sep. 1960 [T-MTT])

    Publication Year: 1960, Page(s): 473
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    Freely Available from IEEE
  • Noise Studies on Two-Cavity CW Klystrons

    Publication Year: 1960, Page(s):474 - 477
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (614 KB)

    The noise properties of a two-cavity CW 3-cm klystron oscillator are discussed with the purpose of studying the noise contribution located close to the center frequency in the audiofrequency range. A system permitting measurements to be made of the mean square frequency deviation is described. Comparisons are made indicating the noise performance of the klystron oscillator when operated under air-... View full abstract»

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  • Optimum Quarter-Wave Transformers

    Publication Year: 1960, Page(s):478 - 482
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The design of uniformly dispersive quarter-wave transformers is a well explored subject. Common examples are rectangular waveguide E-plane transformers, in which the a dimension is kept constant. In this paper, it is shown that the performance of conventional quarter-wave transformers of a single section can always be improved by making the middle section less dispersive than the input and output ... View full abstract»

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  • The Quarter-Wave Transformer Prototype Circuit

    Publication Year: 1960, Page(s):483 - 489
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (646 KB)

    A quarter-wave transformer not only changes impedance levels, but will also behave as a band-pass filter. In practice, however, band-pass filters are usually required to terminate in equal input and output impedances. They often consist of several direct-coupled cavities, which are similar to transformers whose impedance steps have been replaced by reactive obstacles. It is demonstrated how one ca... View full abstract»

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  • Broad-Band Ridge Waveguide Ferrite Devices

    Publication Year: 1960, Page(s):489 - 492
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The design and development of a medium CW power level, 1.57:1 bandwidth, quadruply-ridged circular waveguide Faraday rotator and two high CW power, 2:1 bandwidth, double ridge rectangular waveguide isolators are discussed. The rotator is designed in quadruply-ridged circular waveguide with a ferrite configuration somewhat different from that proposed by other investigators. It can be made to exhib... View full abstract»

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  • Radiation Patterns of a Noise-Excited Thin Slot

    Publication Year: 1960, Page(s):493 - 500
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (783 KB)

    Theoretical and experimental radiation patterns are given in spectral form for the thermal radiation from a cylindrical discharge column which is adjacent to a long thin slot in a metallic plane. A spatial distribution is predicted which exhibits interference minima and maxima when the length of the slot and the wavelength of the emission are the same order of magnitude. The analysis is based on M... View full abstract»

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  • Variational Principles and Mode Coupling in Periodic Structures

    Publication Year: 1960, Page(s):500 - 509
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    Variational techniques are used in analyzing periodic "cold" microwave structures for the angular frequency, omega, as a function of assumed phase shift per periodic cell. Two variational expressions are given: one for omega in terms of the E- and H-fields, and one for k² = omega²µ epsilon in terms of the E-field. For structures with relatively light coupling between cells, the tria... View full abstract»

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  • Determination of the Capacitance, Inductance, and Characteristic Impedance of Rectangular Lines

    Publication Year: 1960, Page(s):510 - 519
    Cited by:  Papers (66)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (857 KB)

    This paper determines the capacitance, inductance, and characteristic impedance of rectangular lines by the method of conformal transformation. In practical applications, such lines may be used as transmission links of RF energy, as impedance-transforming sections, or as components in electron tubes. Formulas are given for the calculation of the parameters of rectangular lines having the following... View full abstract»

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  • The Analysis of a Broad-Band Circular Polarizer Including Interface Reflections

    Publication Year: 1960, Page(s):520 - 525
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (479 KB)

    Transmission characteristics of a broad-band circular polarizer consisting of anisotropic dielectric plates are rigorously analyzed. The transmitted wave is formulated in terms of the incident wave including interface reflections. The influence of the interface reflections on the axial ratio of the polarization is numerically shown vs frequency. Frequency dependence of the power transmission ratio... View full abstract»

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  • Large Signal Analysis of a Parametric Harmonic Generator

    Publication Year: 1960, Page(s):525 - 532
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Large signal analysis of a harmonic generator using a semiconductor diode reveals a larger possible efficiency than a similar small signal analysis. As higher harmonic numbers are reached, large signal analysis becomes increasingly more important in predicting the maximum conversion efficiency. It is shown that there exists an optimum value for the diode bias voltage and an optimum coupling of the... View full abstract»

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  • A Waveguide Switch Employing the Offset Ring-Switch Junction

    Publication Year: 1960, Page(s):532 - 537
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (843 KB)

    This paper describes an X-band microwave ring switch employing a junction of new design. The insertion loss is less than 1/4 db over the design band of 9.0-9.6 kmc; this low loss was obtained through the use of a coupling junction which is designated the offset ring-switch junction. A physical description, the electrical characteristics of the switch, and a qualitative theoretical discussion of th... View full abstract»

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  • Some Limitations on Parametric Amplifier Noise Performance

    Publication Year: 1960, Page(s):538 - 544
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    Now that the precursory period following the solid-state parametric amplifier invention has given way to an era of determined effort to reduce to practice some of the early, optimistic predictions, practical limitations setting an upper bound to the performance of this ingenious communications device have become apparent. In this paper, two such limitations are discussed: First, for a given diode ... View full abstract»

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  • TE Mode Excitation on Dielectric Loaded Parallel Plane and Trough Waveguides

    Publication Year: 1960, Page(s):545 - 552
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (741 KB)

    A theoretical and experimental study of the launching of TE surface wave modes on dielectric loaded parallel plane and trough waveguides has been performed. The source is a linear transverse current filament perpendicular to and extending across the space between the parallel side walls. Families of curves are presented, which show the bidirectional Iaunchlng efficiencies for the dominant TE modes... View full abstract»

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  • A New Semiconductor Microwave Modulator

    Publication Year: 1960, Page(s):553 - 559
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (682 KB)

    A new semiconductor device is proposed for use as an amplitude modulator for microwave transmission. The principle of action depends upon the increase of absorption with an increase of conductivity caused by the injection of excess minority carriers. Experiments conducted at 9600 Mc indicate little or no phase and frequency modulation. The mechanism of the modulation action and the device design a... View full abstract»

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  • Theory and Measurement of Q in Resonant Ring Circuits

    Publication Year: 1960, Page(s):560 - 564
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The loaded and unloaded Q of a resonant ring circuit are derived on the basis of the fundamental definition. Simple experiments are described to measure Q0, QL, and the ring power gain without additional coupling to the ring. A number of graphs are given which are useful for these measurements. View full abstract»

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  • Ferrite Shape Considerations for UHF High-Power Isolators (Correspondence)

    Publication Year: 1960, Page(s): 565
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (135 KB)

    Ferrite isolators deteriorate at high microwave power levels due to the gyromagnetic saturation phenomena described by Suhl. The onset of this deterioration is particularly detrimental to isolator performance when the main and subsidiary resonances coincide. At microwave frequencies the coincidence effect can generally be avoided if thin transversely magnetized ferrite slabs are used. However, at ... View full abstract»

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  • Measurement Technique for Narrow Line Width Ferromagnets (Correspondence)

    Publication Year: 1960, Page(s):565 - 566
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (298 KB)

    Measurement of the line width of a ferromagnetic resonance curve using the now well-known cavity perturbation technique offers some difficulty in the case of very narrow line width samples. Because of their large magnetic susceptibility, such samples produce a large effective filling factor with respect to the cavity. View full abstract»

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  • Multidiode Switches (Correspondence)

    Publication Year: 1960, Page(s):566 - 569
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (605 KB)

    The impedance of crystal diodes is known to depend on the applied bias voltage. This has suggested the use of diodes as switching elements in the control of microwave signal transmission. In the simplest form, the diode switch consists of a transmission line which is shunted by a diode. Coaxial cables as well as waveguides have been used for the transmission lines that are shunted by point-contact... View full abstract»

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  • Technique for Polishing Single Crystal Yttrium-Iron-Garnet Spheres (Correspondence)

    Publication Year: 1960, Page(s): 569
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (143 KB)

    A simple method of polishing Yttrium-iron-garnet spheres which produces samples of fractional oersted linewidths has been employed at the Air Force Cambridge Research Center. The technique consists of "hand-polishing" the crystal spheres in diamond pastes and aluminum oxide powders of diminishing grit sizes. This method significantly increases, both by greater pres-sure and efficiency of abrasive ... View full abstract»

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  • Tunable Two-Mode Cavity with Capacitative Loading (Correspondence)

    Publication Year: 1960, Page(s):569 - 570
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (291 KB)

    A cavity with two independently tunable modes in the 4- to 9-kMc frequency range was needed for experiments in pararnagnetic relaxation. It had to be small enough to fit inside a liquid helium dewar and had to possess a region of approximately uniform RF magnetic field common to both modes over part of its volume. View full abstract»

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  • Unloaded Q of Single Crystal Yttrium-Iron-Garnet Resonator as a Function of Frequency (Correspondence)

    Publication Year: 1960, Page(s):570 - 571
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (291 KB)

    The practical feasibility of constructing magnetically tunable broad-tuning range microwave filters using single crystal yttriumiron-garnet resonators was demonstrated in a recent paper. Experimental results were presented on one- and two- resonator filters which can be tuned by varying a dc magnetic field bias over a full waveguide bandwidth and greater, at the same time maintaining an insertion ... View full abstract»

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  • A Note on the Derivation of the Fields in a Radial Line (Correspondence)

    Publication Year: 1960, Page(s):571 - 572
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (215 KB)

    The concept of a radial transmission line is frequently used in the description of such devices as cylindrical cavity resonators and horn radiators. An approach to the prob-lem of determining the electric and magnetic fields in the radial line has been to solve Maxwell's equations in component form with appropriate boundary conditions. While the following derivation yields nothing new, it does, ho... View full abstract»

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  • Surface Waves on Symmetrical Three-Layer Sandwiches (Correspondence)

    Publication Year: 1960, Page(s): 572
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (78 KB)

    The theory of surface waves on plane dielectric slabs has been presented by Plummer and Hansen. Additional numerical results are shown in Figs. 1 and 2 for the lowest order TM and TE modes that can exist on a grounded dielectric slab. The slab has thickness d, and a relative dielectric constant of 4. It is separated by an air gap of thickness a from the ground plane. c/v represents the ratio of th... View full abstract»

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  • Properties of Symmetric Hybrid Waveguide Junctions (Correspondence)

    Publication Year: 1960, Page(s): 573
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB)

    In his letter J.M. Smith states that in a fully symmetric lossless hybrid where all arms are matched, the amplitudes of the waves traveling in the reverse direction in the main and auxiliary guides are equal. To allow for the existence of the reflected waves this theorem should read: "In a slightly imperfect symmetric hybrid with matched loads on the output ports the amplitude of the reflected wav... 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