• DocumentCode
    847011
  • Title

    New approximations to J0 and J1 Bessel functions

  • Author

    Gross, Frank B.

  • Author_Institution
    Dept. of Electr. Eng., Florida State Univ., Tallahassee, FL, USA
  • Volume
    43
  • Issue
    8
  • fYear
    1995
  • fDate
    8/1/1995 12:00:00 AM
  • Firstpage
    904
  • Lastpage
    907
  • Abstract
    New approximate solutions to the 0th- and 1st order Bessel functions of the first kind are derived. The formulations are based upon using a new integral with no previously known solution. The new integral in the limiting case is identical to the 0th-order Bessel function integral. It is solved in closed form, and the solution is expressed as a simple even order polynomial with integer coefficients. The polynomial coefficients are all of integer value. The 1st-order Bessel function approximation can then be found through a simple derivative. Comparisons are made between the exact solution, classic solutions, and the new approximation. The new approximation proves to be much more accurate than the classic small argument approximation. It is also sufficiently accurate to bridge the gap between the classic large and small argument approximations and has potential applications in allowing one to analytically evaluate integrals containing Bessel functions
  • Keywords
    Bessel functions; electromagnetic wave scattering; function approximation; integral equations; polynomials; 0th-order Bessel function; 1st order Bessel function; J0 Bessel function; J1 Bessel function; approximate solutions; closed form; derivative; even order polynomial; function approximation; integer coefficients; integral; polynomial coefficients; small argument approximation; Antenna measurements; Antennas and propagation; Data mining; Dielectrics; Electromagnetic propagation; Frequency measurement; Polynomials; Radar antennas; Radar scattering; Resonance;
  • fLanguage
    English
  • Journal_Title
    Antennas and Propagation, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-926X
  • Type

    jour

  • DOI
    10.1109/8.402217
  • Filename
    402217