WorldCat Identities

Rippin, James

Overview
Works: 11 works in 15 publications in 1 language and 23 library holdings
Classifications: TK7872.A6,
Publication Timeline
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Most widely held works by James Rippin
Research studies on problems related to antennas( Book )

5 editions published between 1964 and 1965 in English and held by 5 WorldCat member libraries worldwide

Topics include: radiation from periodic structures, log-periodic covity-backed slot antennas, log-periodic magnetic current antennas, log-periodic zigzag antennas, logarithmic spiral antennas, multi-arm logarithmic spiral antennas, integrated antenna amplifier, wave propagation along helical conductors, investigation of periodic structures, investigation of a class of logperiodic structures, radiation lens illuminated from a goubau beam-waveguide, radiation from circular waveguides, omnidirectional and steerable beam antenna development at millimeter wavelengths, millimeter antenna test instrumentation, and components for millimeter wave antennas
Application of cross-correlation techniques to linear antenna array by Robert H MacPhie( Book )

1 edition published in 1963 in English and held by 4 WorldCat member libraries worldwide

The application of cross-correlation techniques to linear antenna arrays is studied. The basic cross-correlation system, which is considered, consists of two linear receiving arrays excited by a distribution of remote radio sources. The terminal voltage of each array is passed through a narrow- band RF filter and the two resulting signals are cross-correlated. It is demonstrated that this system can measure the mutual coherence function of the source distribution. A Fourier analysis shows that the cross-correlation sys tem's output is a filtered version of the mutual coherence function. From this output a three dimensional principal solution can be deduced; it is a generalization of the one-dimensional principal solution given by Bracewell and Roberts in connection with radio astronomy. (Author)
A study of wave propagation of helices by Paul William Klock( Book )

1 edition published in 1963 in English and held by 3 WorldCat member libraries worldwide

Measurement of the phase centers of antennas by John D Dyson( Book )

1 edition published in 1963 in English and held by 2 WorldCat member libraries worldwide

There are many antennas, including the logperiodic and log-spiral antennas, that do not have a unique phase center. For these antennas an 'apparent phase center' is defined over a limited range of space surrounding the antenna. A measurement technique has been developed that will permit automatic plotting of modified phase patterns from which the effective position of this 'apparent phase center' may be determined. This technique requires the use of only standard antenna pattern recording equipment and a detector which is sensitive to the amplitude and to the phase of the radiated field of the particular antenna under consideration. Deviations of these patterns from a unit circle on a polar plot or straight line on a rectangular plot (or as a modification, from the amplitude pattern), may be interpreted from curves supplied, to show the position of the phase center with respect to the known center of rotation used to obtain the patterns. (Author)
Relative convergence of the solution of a doubly infinite set of equations by Raj Mittra( Book )

1 edition published in 1963 in English and held by 2 WorldCat member libraries worldwide

Wide-band corrugated surface antenna by Marvin Lee Wahl( Book )

1 edition published in 1963 in English and held by 2 WorldCat member libraries worldwide

Research concerned a study of flush-mounted broadband antennas of LP (log-periodic) design. Some of the types of designs for flush-mounted antennas which have been attempted are shown. A typical example is given of a class of structures which is fabricated by starting with a planar LP structure which has a satisfactory but bidirectional pattern, i.e., it radiates symmetrically in both hemispheres above and below the antenna. In order to have the energy radiating in the top half alone, the lower portion is usually blocked off with a series of cavities or even a single cavity. Most of these have been found to exhibit poor performance as broad-band antennas. Another configuration is shown that seemingly looks like a dual of the LP dipole antenna. This will not work because the transmission line at the input would be essentially short-circuited by the shunt loops as they got smaller and smaller to satisfy the scaling conditions. There may be ways of getting around this, but a direct approach would be preferable and it is the purpose of this paper to outline one such approach. (Author)
Theoretical brillouin (k-[beta]) diagram for monopole and dipole arrays and their application to log-periodic antennas by Raj Mittra( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

On continously scaled and log-periodic structures by Raj Mittra( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

On maximizing the signal-to-noise ratio of a linear receiving antenna array by Robert H MacPhie( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

On the antenna noise and its minimization by Y. T Lo( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

In this investigation a method of estimating various antenna noises is discussed. In the general case when noise sources are in the near field of the antenna the problem become exceedingly difficult. For this only a high frequency approximation is suggested; it is similar to the general scattering theory of perfectly conducting scatterers. For a given antenna and a given noise temperature distribution in space, an optimum aperture distribution, discrete or continuous, can be obtained by maximizing the signal to noise ratio with a reasonable value of the antenna Q-factor. The solution to this problem is reduced to that of an eigen-value of a matrix equation. As an example, the antenna noise temperature of the University of Illinois Radio Telescope is approximately determined by the method discussed in Section 2. (Author)
A new technique for solving a class of boundary value problems by Raj Mittra( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

An exact solution, in a series form, is formu lated for a wide class of problems for which no such solutions are available at the present time. These problems are characterized by the fact that they are related to an auxiliary problem for which an exact solution in terms of Wiener-Hopf, function theoretic, or other methods, is avail able. It is shown that the solution of the given problem may be developed in a series form, the coefficients involved being expressible in terms of the known scattering coefficients of the auxiliary problem. (Author)
 
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English (15)