Accession Number : AD0423185

Title :   RADIATION CHARACTERISTICS OF A SIDE FIRE HELICAL ANTENNA,

Corporate Author : SYRACUSE UNIV RESEARCH INST N Y

Personal Author(s) : Perini,J.

Report Date : OCT 1963

Pagination or Media Count : 21

Abstract : Radiation characteristics are presented for a side fire helical antenna. The antenna consists of a vertical conducting cylinder, 5 wavelengths long, and two conducting helices, of larger diameter, wrapped around it, withopposite pitches, starting at half of the cylinder length, the feed point, and progressing toward the ends. It radiates mostly a horizontal polarized field. The horizontal pattern is approximately circular and the vertical forms a beam of 12 degrees (gain 5). The bandwidth is over 10%. It has only one feed point on the 5 wavelength aperture. It is very easy to build, self supporting, easily stacked to form an array and can also be used as self-diplexing. An exponentially decaying traveling current is assumed on the helices. The Fourier transform method for reducing the problem to a two dimensional one was used successfully. Computed and experimental data are presented showing good agreement. (Author)

Descriptors :   (*ANTENNA RADIATION PATTERNS, HELICAL ANTENNAS), (*HELICAL ANTENNAS, ANTENNA RADIATION PATTERNS), ANTENNAS, CYLINDRICAL BODIES, HELIXES, ELECTROMAGNETIC FIELDS, POLARIZATION, ANTENNA FEEDS, EXPERIMENTAL DATA, INTEGRAL TRANSFORMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE