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IRE Transactions on Microwave Theory and Techniques

Issue 6 • November 1960

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  • [Front cover - Nov. 1960 [T-MTT]]

    Publication Year: 1960, Page(s):f1 - f2
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    Freely Available from IEEE
  • Index, IRE Transactions on Microwave Theory and Techniques, Volume MTT-8, 1960

    Publication Year: 1960, Page(s):i - v
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    Freely Available from IEEE
  • Table of contents (Nov. 1960 [T-MTT])

    Publication Year: 1960, Page(s): 579
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    Freely Available from IEEE
  • Design of Wide-Band (and Narrow-Band) Band-Pass Microwave Filters on the Insertion Loss Basis

    Publication Year: 1960, Page(s):580 - 593
    Cited by:  Papers (54)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1731 KB)

    A method for design of band-pass microwave filters is described that combines the image and insertion-loss points of view to give an approximate design method having simplicity, but also high precision. This method is applicable for filter designs ranging from narrow to very wide bandwidths (2 to 1 or more). The desired insertion loss characteristic is obtained by use of a lumped-element, Tchebych... View full abstract»

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  • Radio-Frequency System of the Cambridge Electron Accelerator

    Publication Year: 1960, Page(s):593 - 596
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (407 KB)

    The requirements for the RF system of the Cambridge Electron Accelerator are investigated and the choice of the major parameters of the system is discussed. The strongly coupled waveguide cavity system is analyzed and the performance of the system with various types of imperfections is calculated. View full abstract»

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  • Model Studies of a Strongly Coupled Synchrotron RF System

    Publication Year: 1960, Page(s):597 - 604
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    The strongly coupled multicavity synchrotron system proposed for the 6-bev Cambridge Electron Accelerator operates at 475 Mc and, because of its large size, presents complex problems of assembly and tuning. To achieve a better understanding of the characteristics of the system, a scaled model operating at 9000 Mc was constructed. The work was undertaken in two stages; first a simple single-cavity ... View full abstract»

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  • Operation of the Field Displacement Isolator in Rectangular Waveguide

    Publication Year: 1960, Page(s):605 - 611
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (702 KB)

    A field displacement isolator in WR-159 rectangular waveguide consisting of a full height ferrite slab having a resistive film on one face is treated analytically. The resultant transcendental equation was programmed for a computer and values of the propagation constant found in the frequency range 5.90 to 6.45 kMc for various film resistivities. Two TE modes are found to exist whose relative beha... View full abstract»

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  • Peak Internal Fields in Direct-Coupled-Cavity Filters

    Publication Year: 1960, Page(s):612 - 616
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (389 KB)

    Microwave filters are limited in their power-handling capacity by high fields generated inside the filter. Simple formulas are derived here for the peak fields inside each cavity of a direct-coupled-cavity filter at any frequency. The computed peak fields in each cavity of a three-cavity, a four-cavity, and a six-cavity filter as a function of frequency are reproduced up to several harmonics. Insi... View full abstract»

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  • Mismatch Errors in Microwave Phase Shift Measurements

    Publication Year: 1960, Page(s):617 - 622
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB)

    The phase difference between the incident and transmitted waves at the input and output ports, respectively, of a two-arm waveguide junction in a reflection free system is a characteristic of the waveguide junction and is defined as the "phase shift." The difference between the phase shift in a reflection free system and the "change of phase" observed in a system which is not reflection free will ... View full abstract»

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  • A Note on the Optimum Source Conductance of Crystal Mixers

    Publication Year: 1960, Page(s):622 - 627
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (513 KB)

    This paper describes an accurate and convenient technique for measuring the match of a crystal mixer. Use is made of the fact that with a proper RF drive level, the fundamental conductance of a mixer crystal may be made equal to the optimum source conductance of the crystal for mixer operation, The required drive level depends on certain crystal parameters and on the image frequency termination of... View full abstract»

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  • Microwave Switching with Low-Pressure Arc Discharge

    Publication Year: 1960, Page(s):628 - 633
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (575 KB)

    The characteristics of a low-pressure, hot cathode arc discharge have been studied and applied to microwave switching applications. The combination of rapid plasma build-up, low ignition voltage, and fairly rapid plasma decay, offers promise for the development of broad-band, high-power microwave switches which can be closed in tenths of microseconds and opened in a few microseconds or less. Exper... View full abstract»

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  • Characteristic Impedances of Broadside-Coupled Strip Transmission Lines

    Publication Year: 1960, Page(s):633 - 637
    Cited by:  Papers (92)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Formulas are given for the even- and odd-mode characteristic impedances of shielded coupled strip-transmission-line configurations that are especially useful when close coupling is desired. Applications may be made to wideband coupled-strip-line filters, 3-db directional couplers, and many other components. The cross sections considered are thin broadside-coupled strips either parallel or perpendi... View full abstract»

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  • Thickness Corrections for Capacitive Obstacles and Strip Conductors

    Publication Year: 1960, Page(s):638 - 644
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB)

    Capacitive thickness corrections are derived exactly for two basic geometries involving pairs of semi-infinite plates. In one arrangement the pair of plates are coplanar, while in the other they are parallel to each other. In each case the total capacitance per unit length between the pair of plates is infinite, but the incremental increase of capacitance when the thickness is increased from zero ... View full abstract»

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  • Inhomogeneous Quarter-Wave Transformers of Two Sections

    Publication Year: 1960, Page(s):645 - 649
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB)

    An inhomogeneous transformer is defined as one in which the guide wavelength is a function of position; for a homogeneous transformer, the guide wavelength is independent of position. A previous paper has dealt with inhomogeneous transformers of one section; the existence of an optimum design (which is never homogeneous) was demonstrated. The mathematical tools for inhomogeneous transformers of tw... View full abstract»

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  • Errors in Dielectric Measurements Due to a Sample Insertion Hole in a Cavity

    Publication Year: 1960, Page(s):650 - 653
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (490 KB)

    The measurement of complex permittivities of isotropic media at microwave frequencies is performed with high precision by means of cylindrical cavity resonators. However, a hole in the cavity wall, for inserting the sample causes a frequency pulling of the resonator, which in turn introduces an error in the measured dielectric constant. These effects are measured, and with perturbation theory as a... View full abstract»

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  • Measurement of Bandwidth of Microwave Resonator by Phase Shift of Signal Modulation (Correction)

    Publication Year: 1960, Page(s): 653
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    D. S. Lerner and H. A. Wheeler, authors of "Measurement of Bandwidth of Microwave Resonator by Phase Shift of Signal Modulation," which appeared on pages 343-345 of the May, 1960, issue of these Transactions, have brought the following to the attention of the Editor. View full abstract»

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  • A Pre-TR Tube for High Mean Power Duplexing

    Publication Year: 1960, Page(s):654 - 659
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (959 KB)

    A gas discharge tube for transmit-receive switching capable of handling average power levels up to at least 25 kw at 3000 Mc is described. The discharge is excited in the annular space between two concentric silica tubes and recovery time is controlled by the dimensions and gas pressure. In this way, a tube with constant characteristics during life has been achieved. The tube is mounted in a thick... View full abstract»

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  • Circular Electric Mode Directional Coupler

    Publication Year: 1960, Page(s):660 - 666
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (695 KB)

    This paper describes a circular electric mode directional coupler, composed of two coaxial bifurcations in circular waveguide. The coupling coefficient of the directional coupler depends on the separation between the two bifurcations, and a hybrid junction for the circular electric mode may be obtained at the proper separation. The analysis is carried out in terms of scattering matrix elements cha... View full abstract»

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  • An Equivalent Circuit of the Internal Cavity Reflex Klystron-Amplifier (Correspondence)

    Publication Year: 1960, Page(s):667 - 668
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB)

    The experimental results of microwave amplification by the reflex klystron 2K25 have been reported. An equivalent circuit of the 2K25 amplifier was developed and checked with the experimental results. View full abstract»

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  • Some Comments on the Method of Kyhl (Correspondence and Author's Reply)

    Publication Year: 1960, Page(s):668 - 669
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB)

    The purpose of this letter is not to criticize the philosophy of Kyhl's method nor even to engage in a debate as to whether his method is, or is not, more useful than ours. We find his proposals both interesting and meaningful. First, we would like to call attention to two errors in his letter and then to show the close relation of his method to ours. View full abstract»

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  • Scattering Matrix for an N-Port Power-Divider Junction (Correspondence)

    Publication Year: 1960, Page(s): 669
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    During the course of an investigation of a data-processing technique yielding effectively reduced sidelobes and beamwidth for a microwave radar antenna, the need arose for multiport power dividers. In order to avoid an undesirable decrease in the signal-to-noise ratio, it was necessary that these dividers waste no power. Consequently, a scattering matrix was sought which would have the obvious req... View full abstract»

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  • Lossy Resonant Slot Coupling (Correspondence and Authors' Reply)

    Publication Year: 1960, Page(s):669 - 671
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB)

    The paper by Allen and Kino suggests a novel method of combating troublesome cut-off oscillations in periodic slow-wave structures. The idea is to couple loss periodically into the system through slots which are resonant at the center of the (narrow) oscillation range. The high Q of the slots will effectively decouple the loss in the operating range of the pass band. View full abstract»

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  • Broad-Band Hybrid Junctions (Correspondence)

    Publication Year: 1960, Page(s):671 - 672
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A coaxial version of the wide-band stripIine magic T described by E. M. T. Jones in the March, 1960 issue of these Transactions was developed jointly at the Mullard Research Laboratories and the Laboratories of the General Electric Company, England, some years ago. It has proved a powerful component in the design of broad-band receiver circuits and has the advantage of small size and geometrical s... View full abstract»

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  • Lightweight Y-Junction Strip-Line Circulator (Correspondence)

    Publication Year: 1960, Page(s): 672
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (111 KB)

    In a recent issue, the practical realization of a Y-junction strip-line circulator was described which used disks of yttrium iron garnet located at the junction of the Y, magnetically biased above resonance at approximately 2200 gauss. By using a material with a lower saturation magnetization (magnesium, manganese, aluminum ferrite, 4piM=600) we have reduced the bias field required to approximatel... View full abstract»

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  • A Novel Broad-Band Balun (Correspondence)

    Publication Year: 1960, Page(s):672 - 673
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    Broad-band baluns have recently become the subject of renewed interest, particularly those suitable to couple spiral or planar log periodic antennas to the commonly used coaxial lines. 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