A dual polarized line source feed for cylindrical reflector antennas

Author

Shafai, L. ; Ittipiboon, A. ; Dobrowolski, J.A.

Author_Institution

Dept. of Electr. Eng., Manitoba Univ., Winnipeg, Man., Canada

Volume

12

Issue

3

fYear

1987

fDate

7/1/1987 12:00:00 AM

Firstpage

105

Lastpage

111

Abstract

A line source feed for an offset cylindrical parabolic reflector antenna is described. The line source consists of two transverse and longitudinal dipole arrays over a ground plane. The elements of each array are fed separately from a feed waveguide through a coaxial line which is connected to a probe inserted into the waveguide. Within each waveguide these probes form a tapered array. The probes are treated as an N-port network to determine their penetration depth for a required Taylor distribution along the line source. The line source is then constructed and tested for both aperture field distribution and the input impedance. Its performance as a feed for an offset cylindrical parabolic reflector antenna is also studied.

Keywords

antenna feeders; multiport networks; reflector antennas; waveguides; N-port network; Taylor distribution; aperture field distribution; coaxial line; dual polarized line source feed; feed waveguide; input impedance; longitudinal dipole arrays; offset cylindrical parabolic reflector antenna; penetration depth; transverse dipole arrays; Apertures; Coaxial cables; Equations; Feeds; Mathematical model; Probes; Reflector antennas;

fLanguage

English

Journal_Title

Electrical Engineering Journal, Canadian

Publisher

ieee

ISSN

0700-9216

Type

jour

DOI

10.1109/CEEJ.1987.6593829

Filename

6593829