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Microwave Theory and Techniques, IRE Transactions on

Issue 2 • Date April 1956

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Displaying Results 1 - 18 of 18
  • [Front cover]

    Publication Year: 1956 , Page(s): f1 - f2
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  • H.A. Wheeler [Biography]

    Publication Year: 1956 , Page(s): 65
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  • Microwave Engineering - Is It Specialization or Diversification?

    Publication Year: 1956 , Page(s): 66 - 67
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  • Report of Advances in Microwave Theory and Techniques

    Publication Year: 1956 , Page(s): 68 - 74
    Cited by:  Papers (1)
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  • Coupled-Strip-Transmission-Line Filters and Directional Couplers

    Publication Year: 1956 , Page(s): 75 - 81
    Cited by:  Papers (205)  |  Patents (5)
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    This paper describes the theory of operation of coupled strip line tilt ers and directional couplers, and presents information from which these components may be easily designed. Low-pass, band-pass, all-pass, and all-stop filter characteristics are obtained from these coupled lines either by placing open or short circuits at two of the four available terminal pairs, or by interconnecting two of the terminal pairs. Directional couplers having perfect dk-ectivity and constant input impedance at all frequencies, and for all degrees of coupliig, are obtained by placing equal resistive loads at each of the four terminal pairs. View full abstract»

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  • Measurement of Receiver Noise Figures at UHF

    Publication Year: 1956 , Page(s): 81 - 85
    Cited by:  Papers (4)
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    Absolute measurements of noise-figures in the UHF range are described, using hot and cold thermal sources as standards. It was found that the noise temperature of the T-5 6 watt fluorescent tube is 16.1 kO.6 db above k T delta v. Noise diodes were found to be in error at these frequencies by approximately 1 db. View full abstract»

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  • Design and Development of Strip-Line Filters

    Publication Year: 1956 , Page(s): 86 - 93
    Cited by:  Papers (9)
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    Strip transmission lines offer an alternate medium in which microwave filters can be realized. Since bandpass filters designed in waveguide or coaxial lines would necessarily be large at ultra-high frequencies, strip lines provide a practical means of realizing filters which are simply fabricated and which represent an appreciable saving in size and weight. View full abstract»

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  • Measurement of Crystal Impedances at Low Levels

    Publication Year: 1956 , Page(s): 94 - 96
    Cited by:  Papers (2)
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    It is very important to know the impedances of crystal dilodes when constructing circuits such as mixers and detectors in which the crystals are used. It is always difficult to measure these impedances due to the nonlinear characteristics of the crystals but it is most difficult to make the measurements at minimum levels at which the crystals operate, since with such methods as the slotted line, the detector must operate at a still lower level to obtain the required probe decoupling. Thus, since the load whose impedance is being measured is itself a crystal operating at its minimum level, it is practically impossible to obtain a detector with sutlicient sensitivity to make the measurement. Crystal impedances at these minimum levels are of utmost importance as it is here that optimum matching is essential for maximum sensitivity. This paper describes practical tectilques which use only standard equipment to measure crystal impedances at low levels. The detector used is a crystal of the same type as that being measured. The method is capable of precise results and good measurements can be obtained at low levels with little more effort than is normally required in making careful impedance measurements. View full abstract»

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  • Long-Line Effect and Pulsed Magnetrons

    Publication Year: 1956 , Page(s): 97 - 110
    Cited by:  Papers (1)
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    A simplified theory of long-line effect is developed leading to expressions for maximum tolerable line length and vswr. The theory is verified experimentally and photographic evidence of the deleterious effect of long-line behavior is presented. The prevention of long-line effect by various methods, includkg decouplingthe magnetron, attenuation, phase shifter, and ferrite isolators, is discussed. View full abstract»

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  • The Use of Non-Euclidean Geometry in Measurements of Periodically Loaded Transmission Lines

    Publication Year: 1956 , Page(s): 111 - 115
    Cited by:  Papers (3)
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    Tire propagation characteristics of periodically loaded transmission lines can be deduced from impedance measurements taken with a series of dlff erent terminating configurations in a manner analogous to the "nodal shift" ]method of measuring microwave junction characteristics. The non-Euclidean properties of impedance transformations form a particularly simple approach for analyzing measurements in the case of the loaded line. View full abstract»

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  • A New Microwave Frequency Standard by Quenching Oscillator Control

    Publication Year: 1956 , Page(s): 116 - 121
    Cited by:  Papers (1)
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    This paper shows that in this new frequency standard system the multiplication is made by synchronizing oscillation, which is achieved by quenching a microwave oscillator with a standard quartz-crystal oscillator. The output frequency spectrum of this synchronizing oscillator includes only integral multiple frequencies of a quartz-crystal oscillator. Each spectrum can be utilized as standard frequencies. Theoretical calculations and experimental results are also described here. And to avoid the influence of noise voltage on the build-up of the quenching control microwave oscillator, the double modulation system is used, which is controlled and intermitted simultaneously by both f1 voltage (output of the low frequency standard) and n1 f1 voltage (n1 is an integer). By this double modulation method we can understand that the build-up and the stop of the microwave oscillation are exactly controlled by the constant phase of the waves from the standard generator, and also the experimental results of this are described. As an application of this new system, a method of precise frequency measurement is also described. View full abstract»

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  • Determining Attenuation of Waveguide from Electrical Measurements on Short Samples

    Publication Year: 1956 , Page(s): 122 - 129
    Cited by:  Papers (1)
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    improved method for accurately determining the attenuation of waveguide from measurements on very short samples is presented. First, two samples are measured separately and then in tandem. When the measurements are properly made, the sum of the attenuations when the samples are measured separately agrees with the attenuation when measured in tandem at each frequency of measurement. Second, the average effective resistivity is found over a band of frequencies. Using the average effective resistivity, the attenuation at any frequency in the band can be determined. Results for WR159 copper waveguide are shown. View full abstract»

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  • Correspondence 1 - April, 1956

    Publication Year: 1956 , Page(s): 130
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  • Correspondence 2 - April, 1956

    Publication Year: 1956 , Page(s): 130 - 131
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  • Correspondence 3 - April, 1956

    Publication Year: 1956 , Page(s): 131 - 132
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  • Correspondence 4 - April, 1956

    Publication Year: 1956 , Page(s): 132
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  • Contributors - April, 1956

    Publication Year: 1956 , Page(s): 133 - 134
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  • Institutional listings

    Publication Year: 1956 , Page(s): b1 - b2
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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