Accession Number : AD0687744

Title :   BACKFIRE ANTENNAS.

Descriptive Note : Progress rept. no. 6, 1 Jul 67-31 Dec 68,

Corporate Author : TECHNICAL UNIV OF DENMARK LYNGBY LAB OF ELECTROMAGNETIC THEORY

Personal Author(s) : Nielsen,E. Drago ; Pontoppidan,K.

Report Date : 25 JAN 1969

Pagination or Media Count : 46

Abstract : A method for a theoretical investigation of arbitrary backfire antennas based upon the Yagi antenna structure was set up. The mutual impedances between the dipole elements of the antenna has been taken into account, and the field radiated due to a surface wave reflector of finite extent has been calculated using the method of physical optics. Numerical results obtained for Yagi backfire antennas, short-backfire antennas, and Yagi antennas using this theory were compared with numerical and experimental results obtained by others and with experimental results obtained in the Radio Anechoic Chamber of the Technical University of Denmark. (Author)

Descriptors :   (*YAGI ANTENNAS, REFLECTORS), ANTENNA RADIATION PATTERNS, NUMERICAL ANALYSIS, ELECTRICAL IMPEDANCE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE