Short-pulse radiation by a sequentially excited semi-infinite periodic planar array of dipoles


  • Filippo Capolino,

    1. Department of Electric and Computer Engineering, University of Houston, Houston, Texas, USA
    2. Now at Department of Information Engineering, University of Siena, Siena, Italy.
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  • Leopold B. Felsen

    1. Department of Aerospace and Mechanical Engineering, Boston University, Boston, Massachusetts, USA
    2. Also at Polytechnic University, Brooklyn, New York, USA.
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[1] This paper deals with the fourth in a sequence of canonical problems aimed toward an understanding of the time domain (TD) behavior of wideband-excited sequentially pulsed planar periodic finite arrays of dipoles, which play an important role in a variety of practical applications. The present investigation of sequentially pulsed semi-infinite planar dipole arrays extends our previous studies of sequentially pulsed infinite and semi-infinite line dipole arrays and of infinite planar dipole arrays. The discrete element-by-element radiations are converted collectively to radiations from a series of Floquet wave (FW)-modulated truncated smooth equivalent aperture distributions, and to corresponding FW-modulated edge diffraction. After a summary of necessary results from the earlier studies, emphasis is placed on the new truncation-induced TD results and interpretations, which are extracted via phenomenology-matched high-frequency asymptotics from rigorous frequency and time domain formulations parameterized in terms of the dispersive FW instantaneous frequencies and wave numbers. As in our previous studies, the outcome is a numerically efficient, physically incisive algorithm whose accuracy is verified preliminarily by application to a pulsed planar strip array of dipoles.