A hybrid perturbative technique to characterize the coupling between a corrugated horn and a reflector dish

In this paper the electromagnetic coupling between a corrugated horn and a reflector dish is analyzed with a new hybrid perturbative technique. This coupling may produce significant modifications especially in the return loss and in the cross-polar pattern of the feed. The hybrid perturbative approa...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2006-02, Vol.54 (2), p.595-603
Main Authors: Bolli, P., Gentili, G.G., Lucci, L., Nesti, R., Pelosi, G., Toso, G.
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Antennas
Applied sciences
Asymptotic properties
Bulging
Corrugating
Electromagnetic analysis
Electromagnetic coupling
Electromagnetic measurements
Exact sciences and technology
Gaussian beams (GBs)
Gaussian beams (optics)
Horn antennas
Horns
integral equations
Joining
Moment methods
Optical beams
perturbation methods
Physical optics
Radiocommunications
Reflector antennas
Reflectors
Telecommunications
Telecommunications and information theory
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Summary:In this paper the electromagnetic coupling between a corrugated horn and a reflector dish is analyzed with a new hybrid perturbative technique. This coupling may produce significant modifications especially in the return loss and in the cross-polar pattern of the feed. The hybrid perturbative approach combines three different techniques: a mode matching (MM) technique for the propagation inside the horn, a method of moments (MoM) technique for the radiation of the horn taking into account the external part of the horn itself, and a fast Gaussian beam asymptotic physical optics (FGBAPO) technique for the interactions between the feed and the reflector. Some measurements and the comparison with rigorous numerical results demonstrate the accuracy of the new hybrid technique and the effects of this electromagnetic coupling on the feed performance.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2005.863133