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Improved diffraction model and numerical validation for horn antenna gain calculations
Author(s) -
MayhewRidgers Gordon,
Odendaal Johann W.,
Joubert Johan
Publication year - 2009
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20394
Subject(s) - french horn , horn antenna , diffraction , multipole expansion , optics , microwave , aperture (computer memory) , physics , antenna (radio) , acoustics , method of moments (probability theory) , directional antenna , feed horn , computer science , radiation pattern , slot antenna , mathematics , telecommunications , statistics , quantum mechanics , estimator , periscope antenna
In this study, the diffraction model for on‐axis gain calculations of rectangular horn antennas has been improved, mainly through refining the expressions for the aperture fields of the horn to more accurately reflect the astigmatic nature of the wave that emanates from the throat of the horn. As the availability of accurate swept‐frequency measurement results for horn antennas is very limited, the method of moments, employing the multilevel fast multipole method, has been used to validate the improved diffraction model for horn antennas with widely varying flare dimensions. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.