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[Keyword] trial function(2hit)

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  • An Efficient ICT Method for Analysis of Co-planar Dipole Antenna Arrays of Arbitrary Lengths

    Adam Icarus IMORO  Ippo AOKI  Naoki INAGAKI  Nobuyoshi KIKUMA  

     
    PAPER-Antennas and Propagation

      Vol:
    E81-B No:3
      Page(s):
    659-667

    A more judicious choice of trial functions to implement the Improved Circuit Theory (ICT) application to multi-element antennas is achieved. These new trial functions, based on Tai's modified variational implementation for single element antennas, leads to an ICT implementation applicable to much longer co-planar dipole arrays. The accuracy of the generalized impedance formulas is in good agreement with the method of moments. Moreover, all these generalized formulas including the radiation pattern expressions are all in closed-form. This leads to an ICT implementation which still requires much shorter CPU time and lesser computer storage compared to method of moments. Thus, for co-planar dipole arrays, the proposed implementation presents a relatively very efficient method and would therefore be found useful in applications such as CAD/CAE systems.

  • An Improved Circuit Theory for the Analysis of Longer Co-planar Dipole Antennas

    Adam Icarus IMORO  Yoshihisa KANI  Naoki INAGAKI  Nobuyoshi KIKUMA  

     
    LETTER-Antennas and Propagation

      Vol:
    E80-B No:2
      Page(s):
    389-394

    The valid region for the application of the conventional Improved Circuit Theory (ICT) in the analysis of wire antennas is established. To further extend the application of ICT to the analysis of much longer antennas, Tai's trial function is used to derive new formulas for the impedance matrix. Unlike the conventional ICT trial function, Tai's trial functions lead to input impedances which are finite irrespective of antenna length. Results of the new ICT impedance formulas are comparable in accuracy with the general method of moments. Moreover, since all the elements of the new formula have been expressed in closed-form, the resulting ICT algorithm is still superior in terms of computer running time with lesser storage requirement compared to other conventional methods like method of moments. This would enhance ICT applications in CAD/CAE systems.