E-plane analysis of a modified horn antenna with suppressed far-out sidelobe level

Author

Odendaal, Johann W. ; Pistorius, Carl W I

Author_Institution

Dept. of Electron. & Comput. Eng., Pretoria Univ., South Africa

Volume

40

Issue

6

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

620

Lastpage

627

Abstract

It is shown that the far-out sidelobes of a horn antenna can be suppressed by curving the edges in the aperture. A three-dimensional uniform geometrical theory of diffraction (UTD) analysis of the E -plane radiation pattern of the modified horn antenna was performed and compared with straight edges. This analysis indicates that the curvature of the edges does indeed influence the sidelobes to the effect that the modified horn antenna has significantly lower far-out sidelobes. The radiation patterns for modified horns were measured and compared with the calculated patterns and were found to be in good agreement

Keywords

antenna radiation patterns; waveguide antennas; 3-D analysis; E-plane radiation pattern; UTD analysis; edge curvature effect; far-out sidelobes suppression; modified horn antenna; uniform geometrical theory of diffraction; Antenna measurements; Antenna radiation patterns; Antenna theory; Aperture antennas; Horn antennas; Inductors; Pattern analysis; Performance analysis; Physical theory of diffraction; Slot antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.144595

Filename

144595