DocumentCode
1000817
Title
Radiation characteristics of corrugated 
-plane sectoral horns
Author
Narasimhan, M.S. ; Rao, V. Venkateswara
Author_Institution
Indian Institute of Technology, Madras, India
Volume
21
Issue
3
fYear
1973
fDate
5/1/1973 12:00:00 AM
Firstpage
320
Lastpage
327
Abstract
A study of the radiation characteristics of corrugated -plane sectoral horns is described. Assuming the corrugations to be infinitely thin and sufficiently close packed, impedance boundary conditions are imposed on the fields in the axial region of the horn and it is established that a separable modal solution of fields in terms of TE to 
modes is possible for this geometry. The horn aperture field is determined in terms of cylindrical wave functions and the vector diffraction formula is used to analyze the far-field radiation patterns. Excellent agreement is obtained between the theoretically derived pattern with experimental results for horns supporting the balanced 
mode with small flare angles ( 
), designed using the theory presented. Bandwidth properties of the horn have been studied which may be used to advantage in designing a corrugated -plane sectoral horn without much degradation of its radiation characteristics corresponding to the balanced made over a wide frequency bandwidth (1.5:1).
-plane sectoral horns is described. Assuming the corrugations to be infinitely thin and sufficiently close packed, impedance boundary conditions are imposed on the fields in the axial region of the horn and it is established that a separable modal solution of fields in terms of TE to modes is possible for this geometry. The horn aperture field is determined in terms of cylindrical wave functions and the vector diffraction formula is used to analyze the far-field radiation patterns. Excellent agreement is obtained between the theoretically derived pattern with experimental results for horns supporting the balanced mode with small flare angles ( ), designed using the theory presented. Bandwidth properties of the horn have been studied which may be used to advantage in designing a corrugated -plane sectoral horn without much degradation of its radiation characteristics corresponding to the balanced made over a wide frequency bandwidth (1.5:1).Keywords
Corrugated horn antennas; Horn antennas, corrugated; Apertures; Bandwidth; Boundary conditions; Degradation; Diffraction; Geometry; Impedance; Pattern analysis; Tellurium; Wave functions;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.1973.1140502
Filename
1140502
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