Accession Number : AD0777836

Title :   A Note on Radiation Patterns of Array Antennas,


Personal Author(s) : Cottony,Herman V.

Report Date : 13 SEP 1973

Pagination or Media Count : 20

Abstract : The radiation patterns of array antennas are usually expressed as an electric field in the form of a polynomial of complex terms with phases presented in exponential form. This form has certain drawbacks from the analytical standpoint and, in practice, results in limiting the analytical study of arrays to symmetric forms. In this note it is demonstrated that the radiation pattern of an array antenna, whether linear or planar, can be expressed in terms of power as a polynomial of real terms. This form of presentation is shown to have certain advantages; an asymmetry in the array, whether in the positions of the elements or in the current distribution or both, has no effect on the form of the polynomial; each term of the polynomial has a readily recognizable physical significance. Some of the characteristics of this form of radiation pattern representation suggest that it may be more suitable for beam shaping and illumination synthesis. (Author)

Descriptors :   *Antenna radiation patterns, *Antenna arrays, Power gain, Polynomials

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE