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Título: CLASSICAL AXIS-DISPLACED DUAL-REFLECTOR ANTENNAS FOR OMNIDIRECTIONAL COVERAGE
Instituição: ---
Autor(es): FERNANDO JOSE DA SILVA MOREIRA
JOSE RICARDO BERGMANN
Colaborador(es): ---
Catalogação: 08 11:10:20.000000/04/2011
Tipo: PAPER Idioma(s): ENGLISH - UNITED STATES
Nota:
© 2005 IEEE. Reprinted, with permission, from IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 9, SEPTEMBER 2005. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Pontifícia Universidade Catolica do Rio de Janeiro’s. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing view this to document, you agree to all provisions of the copyright laws protecting it.
Referência [en]: https://www.maxwell.vrac.puc-rio.br/eletricaonline/serieConsulta.php?strSecao=resultado&nrSeq=17245@2
Resumo:
The aim of this work is to discuss the synthesis and performance of classical dual-reflector antennas suited for an omnidirectional coverage. The reflector arrangements are axially symmetric with surfaces of revolution generated by axis-displaced conic sections, established from geometrical-optics (GO) standpoints to achieve omnidirectional radiation characteristics. Closed-form equations are derived for the design of all possible reflector configurations. The vector GO aperture field is also obtained, yielding an approximate analysis by the aperture method. Some pertinent geometrical characteristics and efficiency curves are then presented and discussed for several antenna configurations fed by transverse electromagnetic coaxial horns (for vertical polarization). A practical antenna design is conducted and analyzed by the method-of-moments technique, demonstrating the accuracy of the efficiency analysis yield by the aperture method for moderately large antenna apertures.
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