Accession Number : AD0607423

Title :   BALANCED BACKFIRE ZIGZAG ANTENNAS.

Descriptive Note : Technical rept. no. 82,

Corporate Author : ILLINOIS UNIV URBANA ENGINEERING EXPERIMENT STATION

Personal Author(s) : Mayes,Paul E.

Report Date : OCT 1964

Pagination or Media Count : 19

Abstract : Linearly polarized backfire antennas are described which have high front-to-back ratio and very low sidelobes. The backfire radiation is produced from a meandering conductor. The principal directional characteristics can be determined by using linear array theory. When the conductor is periodic this can be related to a series expansion of the fields in space harmonics. The radiation properties of periodic backfire zigzags are compared to the end-fire type previously reported. Bandwidth limitations on the backfire periodic zigzags are readily extended by tapering the structure to produce a log-periodic antenna. Measured patterns and impedance of several log-periodic zigzag antennas illustrate how the performance is related to that of the periodic structures. (Author)

Descriptors :   (*LOG PERIODIC ANTENNAS, THEORY), ANTENNAS, ANTENNA RADIATION PATTERNS, ANTENNA FEEDS, POLARIZATION, DESIGN, PERFORMANCE (ENGINEERING), BANDWIDTH, ULTRAHIGH FREQUENCY

Distribution Statement : APPROVED FOR PUBLIC RELEASE